• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    14 SUMMARY A method, system and computer program for controlling a regeneration process at filters, the method comprising the steps of measuring a pressure drop (PS) between the shrimp chamber 3 and the cleaning chamber 9, measuring a gas flow (q) to determine a filtration speed (vf ), which is the ratio between the gas flow (q) and a filtration area (Af) of the filter material (5), measuring a temperature (T) of the process gas (1) to determine its density (p) and kinematic viscosity (v). A constant (Ksdy) is determined as a function of the filtration area (Af) of the filter material (5) and an outflow area (Ady) of the filter material (5) and a predetermined loss factor (Kdy) of the outflow area (Ady), an outflow pressure drop (Psufsff) over the outflow area (Ady) as a function of the constant (Ksdy) and the filtration rate (vf), a real-purpose filter resistance (Smfeaf), as a function of the pressure drop (PS) and the outflow pressure drop (Psufsff) and the filtration rate (vf). The real filter resistance (Smfeaf) is compared with a predetermined filter resistance (Sfffpfedef), and a regeneration process of the filter material (5) is started in response to the real filter resistance (Smfeaf) being greater than or equal to the predetermined filter resistance (Sfffpfedef). (Fig. 3)
    公开号:SE1450591A1
    申请号:SE1450591
    申请日:2014-05-20
    公开日:2015-11-21
    发明作者:Staffan Jansson
    申请人:Envifront Holding Ab；
    IPC主号:
    专利说明:

    [5] An object of the present invention is to provide a method, system and computer program for controlling the regeneration process in filter cleaning, which is based on the insight that it has previously been disregarded that the process gas does not show a purely linear flow when passing through dust layers and filters. material, and that the control system must also take into account a turbulent flow.
    [6] By determining the real filter resistance, a more accurate control of the regeneration process is thus achieved. Fault control can be avoided in this way. Control with the help of a real filter resistor also results in lower emission levels, lower pressure drops and energy consumption as well as more optimal time intervals between the purifications. This results in a better economy for the organization that operates the treatment plant and a reduced environmental impact.
    [7] The predetermined filter resistance can be in the range 10 - 120 Pa / mm / s, but also outside this range when the filter resistance is process dependent.
    [8] According to a second aspect of the invention, there is provided a system arranged to control a regeneration process of filters, wherein the regeneration process has been preceded by a purification process comprising the steps of supplying process gas comprising dust particles into a raw gas chamber via a raw gas inlet of the raw gas chamber the process gas to pass through a filter material of a filter element of the raw gas chamber, the dust particles being at least partially deposited on the filter material, passing the process gas on an inside of the filter element out through an outflow mouth of the filter element to a purge chamber and further to a purge outlet. configured to perform the steps of measuring a pressure drop between the raw gas inlet and the purge gas outlet, measuring a gas flow to determine a filtration rate, which is the ratio between the gas flow and a filtration area of the filter material, measuring a temperature of the process gas to determine its density and viscosity. d the system is characterized in that it is further configured to determine a constant as a function of the filtration area and an outflow area of the filter material and a predetermined loss factor of the outflow area, determine an outflow pressure drop across the outflow area as a function of the constant and filtration rate, determine a real filter resistance - as a function of the pressure drop and the outflow pressure drop and the filtration speed, compare the real filter resistance with a predetermined filter resistance, and start a regeneration process of the filter material in response to whether the real filter resistance is greater than or equal to the predetermined filter resistance.
    [9] By determining the actual filter resistance with a system, a more accurate control of the regeneration process is thus achieved. Fault control can be avoided in this way. Control with the help of a real filter resistor also provides lower emission levels, lower pressure drops and energy consumption as well as more optimal time intervals between the purifications. This results in better finances for the organization that operates the treatment plant and a reduced environmental impact.
    [10] According to a third aspect of the invention, there is provided a computer program product comprising coded instructions for implementing a method as described above.
    [11] In a preferred embodiment, the method may comprise calculating the constant by the function constant = a second constant * (filtration area of the filter material / (outflow area of the filter material * the predetermined loss factor of the outflow area)) 2.
    [12] The second constant is a conversion factor for correcting the magnitude of the outflow loss from uPa to Pa, when the filtration rate is expressed in the variety mm / s, i.e. the other constant Kg is 0.000001 (106).
    [13] In a preferred embodiment, the method may comprise calculating the outflow pressure drop by the function outflow pressure drop = constant * filtration rate2 * density / 2.
    [14] In a preferred embodiment, the method may comprise calculating the real filter resistance by the function the real filter resistance = (pressure drop - the outflow pressure drop) / the filtration rate.
    [15] In a preferred embodiment, the method may comprise calculating a viscosity-adapted real filter resistor as a function of the real filter resistance and process gas temperature, whereby step comparison and step start may use a viscosity-adapted real filter resistor instead of a real filter resistor.
    [16] In a preferred embodiment, the method may comprise calculating the viscosity-adjusted real filter resistance by the function the viscosity-adjusted real filter resistance = the real filter resistance * (process gas temperature in K / 273) Z, where z is 1.73 for the gas air. For gases other than air, the formula is determined so that it expresses the compensation for the composition of the gas in question.
    [17] Through the five most recently preferred embodiments given above, used individually or in combination with each other, a real filter resistance is calculated which gives even more accurate control of the regeneration process. Fault control can be avoided even better in this way. Control by means of a carefully calculated real filter resistance also gives even lower emission levels, even lower pressure drops and energy consumption as well as even more optimal time intervals between the purifications. This results in an even better economy for the organization that operates the treatment plant and an even reduced environmental impact.
    [18] In a preferred embodiment, the method may comprise initiating a regeneration process of the filter material if the actual filter resistance is greater than or equal to the predetermined filter resistance for at least a predetermined time.
    [19] In a preferred embodiment, the method may comprise initiating a regeneration process of the filter material if the viscosity-adjusted real filter resistance is greater than or equal to the predetermined filter resistance for at least a predetermined time.
    [20] Through the two most recently preferred preferred embodiments, each used separately, it is possible to build in a certain inertia regarding starting a regeneration process after elevated values of the real filter resistance and the viscosity-adjusted real filter resistance have been measured. .
    [21] In a preferred embodiment, the method may comprise supplying dust particles into a plurality of raw gas chambers in a filter housing.
    [22] In a preferred embodiment, the method may comprise supplying dust particles into a plurality of filter elements with filter material in the form of filter hoses, filter bags or filter cassettes.
    [23] Through the two most recently preferred embodiments stated above, used individually or in combination with each other, it is possible to design and operate treatment plants with different sizes of treatment capacity, and these can thus be used for widely differing circumstances.
    [24] In a preferred embodiment, the method may comprise after the step of starting to regenerate the filter material by compressed air pulses, or regenerate the filter material by returning air blowing / reversing the air flow through the filter element, or regenerating the filter material by mechanical shaking, or regenerating the filter material by any other suitable method.
    [25] Through the most recent preferred embodiment given above, it is possible to regenerate the filter material by means of the most optimal method for each specific treatment plant.
    [26] According to a fourth aspect of the invention, there is provided a computer readable medium carrying a computer program product.
    [27] The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
    [28] Figure 1a, Figure 1b and Figure 1c show different cross-sectional views of constituent components of the system.
    [29] Figure 2 shows a block diagram of the system.
    [30] Figure 3 shows a flow chart of a method according to an embodiment of the invention.
    [31] In the following comes a detailed description of embodiments.
    [32] Figures 1a and 1b show overview views in cross section of a filter device with a shrimp chamber 3, to which a raw gas inlet 4 connects. The filter device has a plurality of filter elements 6 in the embodiment shown. A filter element 6 has a filter material 5, an inside 7 and an outflow mouth 8, where each outflow mouth 8 opens into a cleaning chamber 9, to which a cleaning outlet 10 connects.
    [33] Figure 1c shows a section through a filter element 6, where the filter element 6 has a filtration area Af and an outflow area Ady.
    [34] Figure 2 shows a block diagram of the system, comprising a filter housing 11, a shrimp chamber 3, a raw gas inlet 4, a cleaning gas chamber 9, a cleaning gas outlet 10 and a control system 12. The control system is e.g. arranged to perform calculations, i.a. to determine and compare different functions and values and to start regeneration processes. The system also includes sensors for measuring e.g. pressure drop, gas flow and temperature.
    [35] Figure 3 shows a flow chart illustrating a purification and regeneration process of a filter material. The various activities can be performed in other sequences than those shown in this flow chart in connection with this description. Some of the steps can also be performed in parallel.
    [36] Figure 4 shows a block diagram of a control system 12, comprising a processor 12.a, a user interface 12.b, a memory 12.c and communication ports 12.d. Via the communication ports, the control system can receive and send signals from and to other parts of the filter device, respectively. Via the user interface, the control system can communicate with the user, via e.g. a monitor, keyboard, mouse, printer, speaker, microphone, or other type of peripherals. The computer program product can be stored in memory, and executed in the processor.
    [37] In a step S100 process gas 1 comprising dust particles 2 is supplied into a shrimp chamber 3 via a raw gas inlet 4 of the shrimp chamber 3. In a step S110 the process gas 1 is passed through a filter material 5 of a filter element 6 of the shrimp chamber 3, the dust particles 2 at least partially deposited on the filter material 5. In a step S120 the process gas 1 on an inside 7 of the filter element 6 is led out through an outflow mouth 8 of the filter element 6 to a purge chamber 9 and further to a purge outlet 10. In steps S130-S160 a regeneration process is controlled by the filter material 5. In step S130 a pressure drop Ps is measured between the shrimp chamber 3 and the cleaning chamber 9, and a gas flow q is measured to determine a filtration rate vf, which is the ratio between the gas flow q and a filtration area Af of the filter material 5, and a temperature T is measured of the process gas 1 to determine its density p and kinematic viscosity v. In a step S140, a constant Ksdy is determined as a function of f the filtration area Af of the filter material 5, an outflow area Ady of the filter material 5 and a predetermined loss factor Kdy of the outflow area Ady. In a step S140, an outflow pressure drop Psufsff is also determined over the outflow area Ady as a function of the constant Ksdy and the filtration speed vf. In a step S140, a real filter resistance Sffffeai is also determined. As a function of the pressure drop Ps and the outflow pressure drop Psuisff and the filtration speed vf. In a step S150, the real filter resistance Smfeaf is compared with a predetermined filter resistance Sfffpfedef. In a step S160, a regeneration process of the filter material 5 is started in response to whether the real filter resistance Smfeaf differs from the predetermined filter resistance Smpfedef.
    [38] The loss factor Ksdy is thus calculated according to formula KS 2 dy = 10 "6 * <Af), where Ådy * Kdy Kdy is a predetermined loss factor, or more specifically the contraction coefficient for the outflow nozzle area Ady. It is determined e.g. laboratory measure it.
    [39] The values of density p and viscosity v (= the kinematic viscosity) measured in step S130 are used for correcting the calculated value of, Smfeaf, in particular in combustion processes where the temperature varies, e.g. in processes for drying, metal melting, casting, etc., where the temperature of the gas strongly affects the kinematic viscosity of the gas. The kinematic viscosity varies, in addition to the temperature, also with the composition of the gas. Such a correction can e.g. when the gas is air in the temperature range -40 - + 260 ° C look like this: T Z _.
    [40] Filters can consist of filter material which in turn can be included in a filter element.
    权利要求:
    Claims (13)
    [1]
    A method for controlling a regeneration process at filters, wherein the regeneration process has been preceded by a purification process comprising the steps of: supplying process gas (1) comprising dust particles (2) into a shrimp chamber (3) via a raw gas inlet (4) of the shrimp chamber (3) ; causing the process gas (1) to pass through a filter material (5) of a filter element (6) of the shrimp chamber (3), the dust particles (2) being at least partially deposited on the filter material (5); leading the process gas (1) on an inside (7) of the filter element (6) out through an outflow mouth (8) of the filter element (6) to a purge chamber (9) and further to a purge outlet (10); wherein the method of controlling the regeneration process comprises the steps of: measuring a pressure drop (PS) between the shrimp chamber 3 and the cleaning chamber 9; measuring a gas flow (q) to determine a filtration rate (vf), which is the ratio between the gas flow (q) and a filtration area (Af) of the filter material (5); measuring a temperature (T) of the process gas (1) to determine its density (p) and kinematic viscosity (v); characterized in that the method further comprises the steps of: determining a constant (Ksdy) as a function of the filtration area (Af) of the filter material (5) and an outflow area (Ady) of the filter material (5) and a predetermined loss factor (Kdy) of the outflow area ( Ady); determining an outflow pressure drop (Psufsff) over the outflow area (Ady) as a function of the constant (Ksdy) and the filtration rate (vf); determine a real filter resistance (Smfeaf), as a function of the pressure drop (PS) and the outflow pressure drop (Psutstr) and the filtration rate (vf); compare the real filter resistance (Smfeaf) with a predetermined filter resistance (Sm- predef AND start a regeneration process of the filter material (5) in response to whether the real filter resistance (Smfeaf) is greater than or equal to the predetermined filter resistance (Sfffpfede). 11
    [2]
    The method of claim 1, wherein the method comprises calculating the constant (Ksdy) by the function 2 K = 10-6 * (af) sdy Ady * Kdy, (af) the filtration area of the filter material (5) and (Ady) the outflow area of the filter material. the material (5) and (Kdy) the predetermined loss factor of the outflow area (AW) -
    [3]
    A method according to any one of the preceding claims, wherein the method comprises calculating the outflow pressure drop (Psutstr) by the function Ksdy * Vfz * P Psutstr _ f where (Ksdy) is the constant and (vf) the filtration rate and (p) the density.
    [4]
    A method according to any one of the preceding claims, wherein the method comprises calculating the real filter resistance (Smreê ) By the function (PS _ Psufm) "f where (Ps) is the pressure drop and (Pam) is the outflow pressure drop and (vf) is the filtration Smreal I the speed.
    [5]
    A method according to any one of the preceding claims, wherein the method comprises calculating a kinematic viscosity-adjusted real filter resistance (Smreaw) by means of a function of the real filter resistance (Smreal) and the temperature (T) of the process gas (1), wherein in step comparing and step start in claim 1 one uses (Smreaw) (Smreao.
    [6]
    A method according to claim 5, wherein the method comprises calculating the kinemically viscosity-adjusted real filter resistance (Smfeaiv) by the function T Smrealv = Smreal Z 12 where (Smreal) is the real filter resistance, T is the temperature of the process gas (1) in K, and z is a factor that varies with the composition and temperature of the gas according to normal physical relationships.
    [7]
    The method of claim 1, wherein the method comprises initiating a regeneration process of the filter material (5) about the real filter resistance (Smreal) z the predetermined filter resistance (Sm Edef) for at least a predetermined time which is preferably in the range of 2-20 seconds.
    [8]
    A method according to claims 1 and 6, wherein the method comprises starting a regeneration process of the filter material (5) about the viscosity-adjusted real filter resistance (Smreaiv) z the predetermined filter resistance (Smmdef) for at least a predetermined time, preferably in the range 2-20 seconds.
    [9]
    The method of claim 1, wherein the method comprises supplying dust particles into a plurality of raw gas chambers (3) in a filter housing (11).
    [10]
    A method according to claim 1, wherein the method comprises supplying dust particles into a plurality of filter elements (6) with filter material (5) in the form of filter hoses, filter pads or filter cassettes. The method of claim 1, wherein the method after the step of starting comprises: regenerating the filter material (5) by compressed air pulses; or regenerating the filter material (5) by returning air blowing / reversing the air flow through the filter element (6); or regenerate the filter material (5) by mechanical shaking.
    [11]
    A system arranged to control a regeneration process of filters, wherein the regeneration process has been preceded by a purification process comprising the steps of: supplying process gas (1) comprising dust particles (2) into a rye gas chamber (3) via a rye gas inlet (4) of the rye gas chamber; Causing the process gas (1) to pass through a filter material (5) of a filter element (6) of the raw gas chamber (3), the dust particles (2) being at least partially deposited on the filter material (5); leading the process gas (1) on an inside (7) of the filter element (6) out through an outflow mouth (8) of the filter element to a purge chamber (9) and further to a purge outlet (10); wherein the system is configured to perform the steps of: measuring a pressure drop (PS) between the raw gas chamber 3 and the cleaning gas chamber 9; measuring a gas flow (q) to determine a filtration rate (vf), which is the ratio between the gas flow (q) and a filtration area (Af) of the filter material (5); measuring a temperature (t) of the process gas (1) to determine its density (p) and kinematic viscosity (v); characterized in that the system is further configured to: determine a constant (Ksdy) as a function of a second constant (Kg) and the filtration area (Af) of the filter material (5) and an outflow area (Ady) of the filter material (5) and a predetermined loss factor ( Kdy) of the outflow area (Adyf determine an outflow pressure drop (Psuistf) over the outflow area (Ady) as a function of the constant (Ksdy) and the filtration rate (vf); determine a real filter resistance (Smreal), as a function of the pressure drop (PS) and the outflow pressure drop (Psutstr) comparing the real filter resistance (Smreal) with a predetermined filter resistance (smpredef and starting a regeneration process of the filter material (5) in response to whether the real filter resistance (Smreal) is greater than or equal to the predetermined filter resistance. the resistance (Sm edef).
    [12]
    A computer program product comprising coded instructions for implementing a method according to any one of claims 1 to 10 when the computer program product is executed in a processor arranged in the system according to claim 11.
    [13]
    A computer readable medium carrying a computer program product according to claim 12.
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    同族专利:
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4277255A|1979-03-01|1981-07-07|Aktiebolaget Svenska Flaktfabriken|Cleaning process control method for textile barrier filter material|
    DD228176A1|1984-10-09|1985-10-09|Freiberg Brennstoffinst|METHOD FOR MONITORING THE POLLUTION GRADE OF GAS STREAM FILTERS|
    JPH09206536A|1996-02-07|1997-08-12|Ngk Insulators Ltd|Method for backwashing filter in dust collector|
    US6711525B1|1999-04-17|2004-03-23|Pneumatic Products Corporation|Filter monitor|
    US6377171B1|1999-09-15|2002-04-23|Peerless Mfg. Co.|On-line filter monitoring system|
    DE10260784A1|2002-12-23|2004-07-01|Daimlerchrysler Ag|Method for monitoring the degree of contamination of a filter device|
    US7261762B2|2004-05-06|2007-08-28|Carrier Corporation|Technique for detecting and predicting air filter condition|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    SE1450591A|SE537999C2|2014-05-20|2014-05-20|Method, system and computer program to control a regeneration process for filters|SE1450591A| SE537999C2|2014-05-20|2014-05-20|Method, system and computer program to control a regeneration process for filters|
    EP15796654.0A| EP3145616A4|2014-05-20|2015-05-20|Method, system and computer program product for controlling a filter regeneration process|
    PCT/SE2015/050583| WO2015178848A1|2014-05-20|2015-05-20|Method, system and computer program product for controlling a filter regeneration process|
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