SE537999C2 - Method, system and computer program to control a regeneration process for filters - Google Patents
Method, system and computer program to control a regeneration process for filters Download PDFInfo
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- SE537999C2 SE537999C2 SE1450591A SE1450591A SE537999C2 SE 537999 C2 SE537999 C2 SE 537999C2 SE 1450591 A SE1450591 A SE 1450591A SE 1450591 A SE1450591 A SE 1450591A SE 537999 C2 SE537999 C2 SE 537999C2
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- filter
- filter material
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- 238000000034 method Methods 0.000 title claims abstract description 122
- 230000008929 regeneration Effects 0.000 title claims abstract description 42
- 238000011069 regeneration method Methods 0.000 title claims abstract description 42
- 238000004590 computer program Methods 0.000 title claims abstract description 12
- 239000000463 material Substances 0.000 claims abstract description 66
- 238000001914 filtration Methods 0.000 claims abstract description 42
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 229940048207 predef Drugs 0.000 claims abstract description 10
- 230000004044 response Effects 0.000 claims abstract description 7
- ZOCUOMKMBMEYQV-GSLJADNHSA-N 9alpha-Fluoro-11beta,17alpha,21-trihydroxypregna-1,4-diene-3,20-dione 21-acetate Chemical compound C1CC2=CC(=O)C=C[C@]2(C)[C@]2(F)[C@@H]1[C@@H]1CC[C@@](C(=O)COC(=O)C)(O)[C@@]1(C)C[C@@H]2O ZOCUOMKMBMEYQV-GSLJADNHSA-N 0.000 claims abstract description 4
- 230000006870 function Effects 0.000 claims description 27
- 239000000428 dust Substances 0.000 claims description 21
- 239000002245 particle Substances 0.000 claims description 18
- 238000000746 purification Methods 0.000 claims description 13
- 238000010926 purge Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 4
- 230000001172 regenerating effect Effects 0.000 claims description 4
- 230000000977 initiatory effect Effects 0.000 claims description 3
- 238000007664 blowing Methods 0.000 claims description 2
- 239000007789 gas Substances 0.000 description 56
- 230000000694 effects Effects 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 4
- 230000008520 organization Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000005266 casting Methods 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- BCAARMUWIRURQS-UHFFFAOYSA-N dicalcium;oxocalcium;silicate Chemical compound [Ca+2].[Ca+2].[Ca]=O.[O-][Si]([O-])([O-])[O-] BCAARMUWIRURQS-UHFFFAOYSA-N 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000002028 premature Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/446—Auxiliary equipment or operation thereof controlling filtration by pressure measuring
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
- B01D35/14—Safety devices specially adapted for filtration; Devices for indicating clogging
- B01D35/143—Filter condition indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/444—Auxiliary equipment or operation thereof controlling filtration by flow measuring
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
SAMMANDRAG En metod, system och datorprogram for att styra ett regenereringsforlopp vid filter, dar metoden innefattar stegen att mata ett tryckfall (Ps) mellan ragaskammaren 3 och rengaskammaren 9, mata ett gasflode (q) for att bestamma en filtreringshastighet (vf), vilken är kvoten mellan gasflodet (q) och en filtreringsarea (Af) hos filtermaterialet (5), mata en temperatur (T) hos processgasen (1) for att bestamma dess densitet (p) och kinematisk viskositet (v). Darvid bestams en konstant (Ksdy) som fun ktion av filtreringsarean (Af) hos filtermaterialet (5) och en utstromningsarea (Ady) hos filtermaterialet (5) och en forutbestannd forlustfaktor (Kdy) hos utstromningsarean (Ady), ett utstromningstryckfall (P1 over utstromningsarean v sutstr, (Ady) som fun ktion av konstanten (Ksdy) och filtreringshastigheten (vf), ett reellt renodlat filtermotstand (Sweal) 1' som funkt ion av tryckfallet (Ps) och utstromnings- tryckfal let (Psutstr) och filtreringshastigheten (vf). Det reel la filtermotstandet (S1 mreal) jamfors med ett forutbestamt filtermotstand (Sm_predef), och ett regenereringsforlopp av filtermaterialet (5) startas som gensvar pa att det reellt filtermotstandet (Sweal) 1 SUMMARY A method, system and computer program for controlling a regeneration process at filters, the method comprising the steps of feeding a pressure drop (Ps) between the raga gas chamber 3 and the cleaning chamber 9, feeding 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), feed 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 (P1 over the outflow area v sutstr, (Ady) as a function of the constant (Ksdy) and the filtration rate (vf), a real pure filter resistance (Sweal) 1 'as a function of the pressure drop (Ps) and the outflow pressure drop (Psutstr) and the filtration speed (vf) The real filter resistance (S1 mreal) is compared with a predetermined filter resistance (Sm_predef), and a regeneration process of the filter material (5) is started in response to the real filter resistance (Sweal) 1
Description
4 3 SAMMANDRAG En metod, system och datorprogram for att styra ett regenereringsforlopp vid filter, dar metoden innefattar stegen att mata ett tryckfall (Ps) mellan ragaskammaren 3 och rengaskammaren 9, mata ett gasflode (q) for att bestamma en filtreringshastighet (vf), vilken är kvoten mellan gasflodet (q) och en filtreringsarea (Af) hos filtermaterialet (5), mata en temperatur (T) hos processgasen (1) for att bestamma dess densitet (p) och kinematisk viskositet (v). Darvid bestams en konstant (Ksdy) som fun ktion av filtreringsarean (Af) hos filtermaterialet (5) och en utstromningsarea (Ady) hos filtermaterialet (5) och en forutbestannd forlustfaktor (Kdy) hos utstromningsarean (Ady), ett utstromningstryckfall (P1 over utstromningsarean v sutstr, (Ady) som fun ktion av konstanten (Ksdy) och filtreringshastigheten (vf), ett reellt renodlat filtermotstand (Sweal) 1' som funkt ion av tryckfallet (Ps) och utstromnings- tryckfal let (Psutstr) och filtreringshastigheten (vf). Det reel la filtermotstandet (S1 mreal) jamfors med ett forutbestamt filtermotstand (Sm_predef), och ett regenereringsforlopp av filtermaterialet (5) startas som gensvar pa att det reellt filtermotstandet (Sweal) 1 är store an eller lika med det forutbestamda filtermotstandet (sm- predef)- METOD, SYSTEM OCH DATORPROG RAM FOR ATT STYRA ETT REGENERERINGSFORLOPP VID FILTER Tekniskt omrade SUMMARY A method, system and computer program for controlling a regeneration process at filters, the method comprising the steps of feeding a pressure drop (Ps) between the raga gas chamber 3 and the cleaning chamber 9, feeding 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), feeding 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 (P1 over the outflow area v sutstr, (Ady) as a function of the constant (Ksdy) and the filtration rate (vf), a real pure filter resistance (Sweal) 1 'as a function of the pressure drop (Ps) and the outflow pressure drop (Psutstr) and the filtration speed (vf) The real filter resistance (S1 mreal) is compared with a predetermined filter resistance (Sm_predef), and a regeneration process of the filter material (5) is started in response to the real filter resistance (Sweal) 1 being greater than or equal to the predetermined filter resistance (Sm-predef). predef) - METHOD, SYSTEM AND COMPUTER PROGRAM FRAMEWORK FOR CONTROLLING A REGENERATION PROCESS BY FILTER Technical area
[0001] Foreliggande uppfinning avser en metod, system och datorprogram for att styra ett regenereringsforlopp vid filter. The present invention relates to a method, system and computer program for controlling a regeneration process at filters.
Bakgrund Background
[0002]En reningsanlaggning innehaller filter for att rena processgas tan stoft- partiklar. Om denna orenade processgas skulle slappas ut i atnnosfaren kunde det ge upphov till stora miljoproblem. Processgasen fors via ett ragasinlopp in i en ragaskammare, dar den passerar ett filtermaterial och stoftpartiklar avsatts clarpa. Renad gas leds darefter genom ett rengasutlopp. Stoftpartiklar som har avsatts pa filtermaterialet kommer efter en viss tid da dessa har uppgatt till en alltfOr stor nnangd att utgora ett problem for en fortsatt reningsprocess. Darav anvander man sig traditionellt av regenereringsfOrlopp fOr att kontinuerligt rena filtermaterial i ren ing sanlagg ning a r. A purification plant contains filters for purifying process gas and dust particles. If this crude process gas were to be released into the atmosphere, it could give rise to major environmental problems. The process gas is conveyed via a raga gas inlet into a raga gas chamber, where it passes a filter material and dust particles are deposited clarpa. Purified gas is then passed through a purge gas outlet. Dust particles that have been deposited on the filter material will, after a certain time as these have amounted to an excessive amount, constitute a problem for a continued purification process. Of this, regeneration processes are traditionally used to continuously clean filter materials in cleaning plants.
[0003]Det är kant att ett traditionellt regenereringsforlopp av reningsanlagg- ningar kan styras av tryckfallet mellan ragasinlopp och rengasutlopp samt f6rs6k till avlasning av stoftbelaggningens omfattning pa och i filtermaterialet har gjorts. It is an edge that a traditional regeneration process of treatment plants can be controlled by the pressure drop between raga gas inlet and treatment gas outlet and attempts have been made to unload the extent of the dust coating on and in the filter material.
[0004] Trots existerande styrning av regenereringsforlopp uppkommer ofta felstyrning av filtermaterial i reningsanlaggningar. Felstyrning kan exempelvis ta formen av overrensning och underrensning av system. Vid felstyrning av regenereringsfOrlopp kan bland annat onOdigt hOga stoftemissionsnivaer uppsta. AlltfOr hoga tryckfall samt antic& korta tidsintervaller mellan regenereringarna i reningssystem kan uppkomma. Dessa effekter är bade kostsamma fOr organisationens ekonomi och on6digt miljobelastande da energikonsumtionen tikar. Andra problem sasom ontidigt slitage av filtermaterial och tivriga komponenter, samt inarbetning av stoftpartiklar i filtermaterial kan uppkomma vid felstyrning av regenereringsforlopp. Dessa effekter generar naturligtvis hogre driftskostnader och lagre reningseffekt. 1 Sammanfattning av uppfinningen Despite existing control of regeneration processes, incorrect control of filter material often occurs in treatment plants. Fault control can, for example, take the form of over-cleaning and under-cleaning of systems. In the event of incorrect control of the regeneration process, unnecessarily high dust emission levels can arise, among other things. Excessive pressure drops as well as antic & short time intervals between regenerations in treatment systems can occur. These effects are both costly for the organization's finances and unnecessarily damaging to the environment as energy consumption declines. Other problems such as premature wear of filter materials and tyrant components, as well as incorporation of dust particles into filter materials can arise from incorrect control of regeneration processes. These effects naturally generate higher operating costs and lower purification effect. Summary of the Invention
[0005] Ett andamal med foreliggande uppfinning är att astadkomma en metod, system och datorprogram for att styra regenereringsforloppet vid rensning av filter, som bygger pa insikten att man tidigare har bortsett fran att processgasen inte uppvisar en renodlad linjar stromning vid passagen genom stoftskikt och filter-material, och att styrsystennet aven nnaste ta hansyn till en turbulent strannning. Uppfinningen astadkommer darmed en mer noggrann berakning, gentemot kand teknik, gallande hur reningsprocessen ska styras. Uppfinningen har till andarnal att avhjalpa eller att reducera atminstone en av nackdelarna med kand teknik, eller atminstone astadkomma ett anvandbart alternativ till kand teknik. 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 pure linear flow at the passage through dust layers and filters. material, and that the steering system also next take into account a turbulent stranding. The invention thus provides a more accurate calculation, in relation to prior art, of how the purification process is to be controlled. The object of the invention is to remedy or reduce at least one of the disadvantages of prior art, or at least to provide a useful alternative to prior art.
Enligt en forsta aspekt av uppfinningen astadkommes en metod for att styra ett regenereringsforlopp av filter, dar regenereringsforloppet har foregatts av en reningsprocess innefattande stegen att tillfora processgas innefattande stoftpartiklar in i en ragaskammare via ett ragasinlopp hos ragaskammaren, bringa processgasen att passera genom ett filtermaterial hos ett filterelement hos ragaskammaren varvid stoftpartiklarna atminstone delvis avsatts pa filtermaterialet, leda processgasen pa en insida has filterelementet ut genom en utstromningsmynning hos filterelementet till en rengaskammare och vidare till ett rengasutlopp, varvid nnetoden for att styra regenereringsforloppet innefattar stegen att mata ett tryckfall nnellan ragasinloppet och rengasutloppet, mata ett gasflode for att bestamnna en filtreringshastighet, vilken är kvoten mellan gasflodet och en filtreringsarea hos filtermaterialet, mata en temperatur hos processgasen for att bestamma dess densitet och viskositet, varvid metoden kannetecknas av att vidare bestamma en konstant som funktion av filtreringsarean och en utstromningsarea hos filtermaterialet och en forutbestamd forlustfaktor hos utstromningsarean, bestamma ett utstromningstryckfall Over utstromningsarean som funktion av konstanten och filtreringshastigheten, bestamma ett renodlat filtermotstand kallat reellt filtermotstand som funktion av tryckfallet och utstromningstryckfallet och filtreringshastigheten, jannfora det reella filternnotstandet med ett forutbestannt filternnotstand, och starta ett regenereringsforlopp av filtermaterialet som gensvar pa om det reella filtermotstandet är storre an eller lika med det forutbestamda filtermotstandet. 2 According to a first aspect of the invention there is provided a method of controlling 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 ragas chamber via a ragasin inlet of the ragas chamber, passing a process gas of a filter gas filter element of the ragas chamber, the dust particles being at least partially deposited on the filter material, leading the process gas on an inside of the filter element out through an outflow mouth of the filter element to a cleaning chamber and further to a cleaning outlet, the method of controlling the regeneration process comprising the steps feeding a gas flow to determine a filtration rate, which is the ratio between the gas flow and a filtration area of the filter material, feeding a temperature of the process gas to determine its density and viscosity, wherein the method can be characterized by further determining 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, determining an outflow pressure drop over the outflow area as a function of constant and the filtration rate, 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. 2
[0006] Genom att bestamma det reella filtermotstandet astadkommes darmed en mer noggrann styrning av regenereringsforloppet. Felstyrning kan pa detta satt undvikas. Styrning med hjalp av ett reellt filtermotstand ger aven lagre emissionsnivaer, lagre tryckfall och energikonsumtion samt mer optimala tidsintervaller nnellan reningarna. Detta resulterar i en battre ekonomi fOr organ isationen som driver reningsanlaggningen samt en minskad milyipaverkan. By determining the real filter resistance, a more accurate control of the regeneration process is thus achieved. Error control can thus be avoided. Control with the help of a real filter resistance also gives lower emission levels, lower pressure drops and energy consumption as well as more optimal time intervals after the purifications. This results in a better economy for the organization that operates the treatment plant and a reduced environmental impact.
[0007]Det fOrutbestamda filtermotstandet kan ligga i intervallet 10- 1 Pa/mm/s, men aven utanfor detta intervall da filtermotstandet är processberoende. The predetermined filter resistance can be in the range 10- 1 Pa / mm / s, but also outside this range as the filter resistance is process dependent.
[0008] Enligt en andra aspekt av uppfinningen astadkommes ett system anordnat for att styra ett regenereringsforlopp av filter, dar regenereringsforloppet har fOregatts av en reningsprocess innefattande stegen att tillfOra processgas innefattande stoftpartiklar in i en ragaskammare via ett ragasinlopp hos ragaskammaren, bringa processgasen att passera genom ett filtermaterial hos ett filterelement hos ragaskammaren varvid stoftpartiklarna atminstone delvis avsatts pa filtermaterialet, leda processgasen pa en insida hos filterelementet ut genom en utstromningsmynning hos filterelementet till en rengaskammare och vidare till ett rengasutlopp, varvid systemet är konfigurerat att utfora stegen att mata ett tryckfall nnellan ragasinloppet och rengasutloppet, mata ett gasflode for att bestamma en filtreringshastighet, vilken är kvoten mellan gasflodet och en filtreringsarea hos filtermaterialet, mata en temperatur hos processgasen for att bestamma dess densitet och viskositet, varvid systemet kannetecknas av att det vidare är konfigurerat att bestannnna en konstant som funktion av filtreringsarean och en utstronnningsarea hos filtermaterialet och en forutbestamd forlustfaktor hos utstromningsarean, bestamma ett utstronnningstryckfall over utstromningsarean som funktion av konstanten och filtreringshastigheten, bestamma ett reellt filtermotstand7 som funktion av tryckfallet och utstromningstryckfallet och filtreringshastigheten, jamfora det reella filtermotstandet med ett forutbestamt filtermotstand, och starta ett regenereringsforlopp av filtermaterialet som gensvar pa om det reella filtermotstandet är storre an eller lika med det forutbestamda filtermotstandet. 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 ragas chamber via a ragasin inlet of the ragas gas chamber. a filter material of a filter element of the ragas 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 cleaning chamber and further to a cleaning outlet, the system configured to perform the steps of feeding a pressure drop. and the purge gas outlet, feeding a gas flow to determine a filtration rate, which is the ratio between the gas flow and a filtration area of the filter material, feeding a temperature of the process gas to determine its density and viscosity, wherein the system It can be further characterized in that it is further configured to determine a constant as a function of the filtration area and a discharge area of the filter material and a predetermined loss factor of the outflow area, to determine an outflow pressure drop across the outflow area as a function of the constant and filtration velocity. and the filtration rate, comparing the real filter resistance with a predetermined filter resistance, and starting 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.
[0009] Genom att med ett system bestamma det reella filtermotstandet astadkommes darmed en mer noggrann styrning av regenereringsfOrloppet. Felstyrning 3 kan pa detta satt undvikas. Styrning med hjalp av ett reellt filtermotstand ger aven lagre emissionsnivaer, lagre tryckfall och energikonsumtion samt mer optimala tidsintervaller mellan reningarna. Detta resulterar i en battre ekonomi fOr organisationen som driver reningsanlaggningen samt en minskad miljopaverkan. By determining the real filter resistance with a system, a more accurate control of the regeneration process is thus achieved. Fault control 3 can thus be avoided. Control with the help of a real filter resistance also gives 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.
[0010] Enligt en tredje aspekt av uppfinningen astadkommes en datorprogramprodukt innefattande kodade instruktioner for att implementera en enligt ovan beskriven metod. 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.
[0011] Vid en foredragen utforingsform kan metoden innefatta att berakna konstanten genom funktionen konstanten= en andra konstant*(filtreringsarean hos filtermaterialet / (utstr6mningsarean hos filtermaterialet *den forutbestamda fOrlustfaktorn hos utstrOmningsarean))2. 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.
[0012] Den andra konstanten är en omrakningsfaktor for korrigering av storleken pa utstrOmningsfOrlusten -Iran pPa till Pa, nar filtreringshastigheten uttrycks i sorten mm/s, dvs. den andra konstanten K2 är 0,000001 (101. The second constant is a shaking factor for correcting the magnitude of the outflow loss -Iran pPa to Pa, when the filtration rate is expressed in the variety mm / s, i.e. the other constant K2 is 0.000001 (101.
[0013] Vid en foredragen utforingsform kan metoden innefatta att berakna utstromningstryckfallet genom funktionen utstromningstryckfallet = konstanten *filtreringshastigheten2* densiteten/2. In a preferred embodiment, the method may comprise calculating the outflow pressure drop by the outflow pressure drop function = constant * filtration rate2 * density / 2.
[0014] Vid en foredragen utforingsform kan metoden innefatta att berakna det reella filtermotstandet genom funktionen det reella filtermotstandet= (tryckfallet - utstrom n ingstryckfal let)/fi ltreringshastig heten In a preferred embodiment, the method may comprise calculating the real filter resistance by the function the real filter resistance = (pressure drop - outflow pressure drop) / filtration rate
[0015] Vid en f6redragen utforingsform kan metoden innefatta att berakna ett viskositetsanpassat reellt filtermotstand som en funktion av det reella filtermotstandet och processgasens temperatur, varvid steget jamfora och steget starta kan anvanda sig av ett viskositetsanpassat reellt filtermotstand istallet for ett reellt filtermotstand. In a preferred embodiment, the method may comprise calculating a viscosity-adjusted real filter resistance as a function of the real filter resistance and the process gas temperature, wherein the step comparing and the step start may use a viscosity-adjusted real filter resistance instead of a real filter resistance.
[0016] Vid en foredragen utforingsform kan metoden innefatta att berakna det viskositetsanpassade reella filtermotstandet genom funktionen det viskositetsanpassade reella filtermotstandet = det reella filtermotstandet * (processgasens 4 temperatur i K/273)z, varvid z är 1,73 fOr gasen luft. For andra gaser an luft bestams formeln sá att den uttrycker kompensationen for den aktuella gasens sammansattning. 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 * (the temperature of the process gas 4 in K / 273) z, where z is 1.73 for the gas air. For other gases than air, the formula is determined so that it expresses the compensation for the composition of the gas in question.
[0017] Genom de fern ovan senast angivna foredragna utforingsformerna, anvanda var och en for sig eller i kombination med varandra, beraknas ett reellt filtermotstand som ger an noggrannare styrning av regenereringsforloppet. Felstyrning kan pa detta satt undvikas an battre. Styrning med hjalp av ett en nog-grant beraknat reellt filtermotstand ger aven an lagre emissionsnivaer, an lagre tryckfall och energikonsumtion samt an mer optimala tidsintervaller mellan reningarna. Detta resulterar i en an battre ekonomi for organisationen som driver reningsanlaggningen samt en an minskad miljopaverkan. By the four most recently preferred preferred embodiments, used individually or in combination with each other, a real filter resistance is calculated which gives a more accurate control of the regeneration process. Fault control can thus be avoided better. Control with the help of a accurately calculated real filter resistance also gives 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.
[0018] Vid en f6redragen utf6ringsform kan metoden innefatta att starta ett regenereringsforlopp av filtermaterialet om det reella filtermotstandet är stOrre an eller lika med det forutbestamda filtermotstandet under atminstone en -brutbestamd tid. 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 one predetermined time.
[0019] Vid en foredragen utf6ringsform kan metoden innefatta att starta ett regenereringsforlopp av filtermaterialet om det viskositetsanpassade reella filternnotstandet är st6rre an eller lika med det forutbestamda filtermotstandet under atminstone en forutbestamd tid. 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.
[0020] Genom de tva ovan senast angivna f6redragna utf6ringsformerna, anvanda var och en fOr sig, ges mojlighet att bygga in en viss trOghet gallande att starta ett regenereringsforlopp efter det att forhojda varden av det reella filtermotstandet respektive det viskositetsanpassade reella filtermotstandet har uppmatts. Denna forutbestamda tid eller alternativt uttryckt den inbyggda trogheten kan ligga inom intervallet 2-20 sekunder, men aven utanfor detta intervall beroende pa hur snabba eller toga reglercyklerna är. Through the two most recently preferred embodiments, each used separately, it is possible to build in a certain inertia gallant to start a regeneration process after increasing the value of the real filter resistance and the viscosity-adjusted real filter resistance, respectively, have been fed. This predetermined time or alternatively expressed the built-in fidelity can be within the interval 2-20 seconds, but also outside this interval depending on how fast or slow the control cycles are.
[0021] Vid en foredragen utforingsform kan metoden innefatta att tillfora stoftpartiklar in i ett flertal ragaskammare i ett filterhus. In a preferred embodiment, the method may comprise supplying dust particles into a plurality of raga gas chambers in a filter housing.
[0022] Vid en foredragen utforingsform kan metoden innefatta att tillfOra stoftpartiklar in i ett flertal filterelement med filtermaterial i form av filterslangar, filterpasar eller filterkassetter. 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 passes or filter cassettes.
[0023] Genom de tva ovan senast angivna foredragna utforingsformerna, anvanda var och en for sig eller i kombination med varandra, ges mojlighet att konstruera och driva reningsanlaggningar med olika stora reningskapacitet, och dessa kan darmed nyttjas till vitt skilda omstandigheter. The two most recently preferred preferred embodiments, used individually or in combination with each other, make it possible to design and operate treatment plants with different sizes of treatment capacity, and these can thus be used for widely differing conditions.
[0024] Vid en foredragen utforingsform kan metoden innefatta efter steget att starta att regenerera filtermaterialet genom tryckluftspulser, eller regenerera filtermaterialet genom returluftblasning/reversering av luftflodet genom filterelementet, eller regenerera filtermaterialet genom mekanisk skakning, eller regenerera filtermaterialet med hjalp av nagot annan lamplig metod. 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 other method.
[0025] Genom den senast ovan angivna fOredragna utforingsformen, ges mOjlighet till att regenerera filtermaterialet med hjalp av den mest optimala metoden f6r vane specifik reningsanlaggning. Through the above-mentioned Preferred embodiment, it is possible to regenerate the filter material with the aid of the most optimal method for habit-specific treatment plants.
[0026] Enligt en fjarde aspekt av uppfinningen astadkommes ett datorlasbart medium barande en datorprogramprodukt. According to a fourth aspect of the invention, there is provided a computer readable medium carrying a computer program product.
Kortfattad beskrivning av ritningarna Brief description of the drawings
[0027] Uppfinningen kommer nu att beskrivas, sasonn exempel, med hanvisning till bifogade ritningar, pa vilka: The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
[0028]Figur la, Figur lb och Figur lc visar olika tvarsnittsvyer Over ingaende komponenter av systemet. Figure 1a, Figure 1b and Figure 1c show different cross-sectional views of components of the system.
[0029] Figur 2 visar ett blockschema Over systemet. Figure 2 shows a block diagram of the system.
[0030] Figur 3 visar ett flodesschema Over en metod enligt en utforingsform av uppfinningen. Figure 3 shows a flow chart of a method according to an embodiment of the invention.
Beskrivning av utforingsformer Description of embodiments
[0031]I det foljande kommer en detaljerad beskrivning av utforingsformer. 6 [0031] The following is a detailed description of embodiments. 6
[0032]Figur 1a och lb visar Oversiktsvyer i tvarsnitt av en filteranordning med en ragaskammare 3, till vilket ett ragasinlopp 4 ansluter. Filteranordningen uppvisar ett flertal filterelement 6 i den visade utforingsformen. Ett filterelement 6 uppvisar ett filtermaterial 5, en insida 7 samt en utstromningsmynning 8, dar varje utstrOmningsmynning 8 utmynnar i en rengaskammare 9, till vilket ett rengasutlopp 10 ansluter. Figures 1a and 1b show overview views in cross section of a filter device with a raga gas chamber 3, to which a raga 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.
[0033]Figur lc visar ett snitt genom ett filterelement 6, dar filterelementet 6 har en filtreringsarea Af och en utstromningsarea Ady. 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.
[0034]Figur 2 visar ett blockschema over systemet, innefattande ett filterhus 11, en ragaskammare 3, ett ragasinlopp 4, en rengaskammare 9, ett rengasutlopp 10 samt ett styrsystem 12. Styrsystemet är t.ex. anordnat att utfOra berakningar, bl.a. att bestamma och jamfora olika funktioner och varden samt att starta regenereringsfOrlopp. Systemet innefattar aven sensorer fOr att mata bl.a. tryckfall, gasflOde och temperatur. Figure 2 shows a block diagram of the system, comprising a filter housing 11, a raga gas chamber 3, a raga 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 a regeneration process. The system also includes sensors for feeding e.g. pressure drop, gas flow and temperature.
[0035]Figur 3 visar ett flOdesschema vilket illustrerar ett renings- och regenere- ringsforlopp av ett filtermaterial. De olika aktiviteterna kan utforas i andra foljder an vad som visas i detta flOdesschema med anknytning till denna beskrivning. Nagra av stegen kan aven utforas parallellt. 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.
[0036] Figur 4 visar ett blockschema Over ett styrsystem 12, innefattande en processor 12.a, ett anvandargranssnitt 12.b, ett minne 12.c och kommunikationsportar 12.d. Via kommunikationsportarna kan styrsystemet ta emot och sanda signaler Than respektive till andra delar av filteranordningen. Via anvandargranssnittet kan styrsystemet kommunicera med anvandaren, via t.ex. en bildskarm, tangentbord, mus, skrivare, hogtalare, mikrofon eller andra typer av kringutrustning. Datorprogramprodukten kan lagras i minnet, och exekveras i processorn. 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 Than respectively to other parts of the filter device. 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.
[0037]I ett steg S100 tillfors processgas 1 innefattande stoftpartiklar 2 in i en ragaskammare 3 via ett ragasinlopp 4 hos ragaskammaren 3. I ett steg S110 bringas processgasen 1 att passera genom ett filtermaterial 5 hos ett filterelement 6 hos ragaskammaren 3 varvid stoftpartiklarna 2 atminstone delvis avsatts pa 7 filtermaterialet 5. I ett steg S120 leds processgasen 1 pa en insida 7 hos filterelementet 6 ut genom en utstromningsmynning 8 hos filterelementet 6 till en rengaskammare 9 och vidare till ett rengasutlopp 10. I steg S130-S160 styrs ett regenereringsforlopp av filtermaterialet 5. I steg S130 mats ett tryckfall Ps mellan ragaskammaren 3 och rengaskammaren 9, och ett gasflOde q mats fOr att bestamma en filtreringshastighet vf, vilken är kvoten mellan gasflodet q och en filtreringsarea Af hos filtermaterialet 5, och en temperatur T mats hos processgasen 1 f6r att bestamma dess densitet p och kinematisk viskositet v. I ett steg S140 bestams en konstant Ksdy som funktion av filtreringsarean Af hos filtermaterialet 5, en utstromningsarea Ady hos filtermaterialet 5 och en forutbestamd forlustfaktor Kdy hos utstromningsarean Ady. I ett steg S140 bestams aven ett utstromningstryckfall P - sutstr over utstromningsarean Ady som funktion av konstanten Ksdy och filtreringshastigheten vf. I ett steg S140 bestams aven ett reellt filtermotstand Smreal som funktion av tryckfallet Ps och utstronnningstryckfallet Psutstr och filtreringshastigheten vf. I ett steg S150 jamfors det reella filtermotstandet Smreal med ett forutbestamt filtermotstand Sm-predef• I ett steg S160 startas ett regenereringsforlopp av filtermaterialet 5 som gensvar pa om det reella filtermotstandet Smreal skiljer sig gentemot det forutbestamda filtermotstandet smpredef• In a step S100 process gas 1 comprising dust particles 2 is supplied into a raga gas chamber 3 via a raga gas inlet 4 of the raga gas chamber 3. In a step S110 the process gas 1 is passed through a filter material 5 of a filter element 6 of the raga gas 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 of the filter material is controlled In step S130, a pressure drop Ps is fed between the raga gas chamber 3 and the purge chamber 9, and a gas flow q is fed 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 fed 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 file 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 P - 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 Smreal is also determined as a function of the pressure drop Ps and the ejection pressure drop Psutstr and the filtration speed vf. In one step S150 the real filter resistance Smreal is compared with a predetermined filter resistance Sm-predef • In a step S160 a regeneration process of the filter material 5 is started in response to whether the real filter resistance Smreal differs from the predetermined filter resistance smpredef •
[0038]Forlustfaktorn Ksdy framraknas salunda enligt formel Ksay = -6 ( Af )2 , dar Ady*Kdy Kdy är en forutbestannd forlustfaktor, eller narmare bestamt kontraktionskoefficienten for utstromningsdysans utstromningsarea Ady. Den bestams t.ex. genom att laboratoriemassigt mata fram den. The loss factor Ksdy is thus calculated according to formula Ksay = -6 (Af) 2, where Ady * Kdy Kdy is a predetermined loss factor, or more precisely the contraction coefficient for the outflow nozzle area of the outflow nozzle Ady. It is determined e.g. by feeding it in a laboratory.
[0039] De i steg S130 uppmatta vardena pa densitet p och viskositet v (= den kinematiska viskositeten) anvands for korrigering av frannraknat varde pa, Smreal, framfor alit vid forbranningsprocesser dar temperaturen varierar, t.ex. vid processer for torkning, metallsmaltning, gjutning etc., dar gasens temperatur kraftigt paverkar gasens kinematiska viskositet. Den kinematiska viskositeten varierar, 8 fiirutom med temperauren, ocksa med gasens sammansattning. En sadan korrektion kan t.ex. nar gasen är luft inom temperaturomradet -40 - + 260°C se ut enligt fOljande: Smrealv = Smreal * (273,) , dar z = 1,73 The values of density p and viscosity v (= the kinematic viscosity) measured in step S130 are used to correct the deducted value of, Smreal, rather than alite 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, 8 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 as follows: Smrealv = Smreal * (273,), where z = 1.73
[0040]Filter kan besta av filtermaterial som i sin tur kan inga i ett filterelement. 9 Filters can consist of filter materials which in turn can not be present in a filter element. 9
Claims (12)
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1450591A SE537999C2 (en) | 2014-05-20 | 2014-05-20 | Method, system and computer program to control a regeneration process for filters |
| EP15796654.0A EP3145616A4 (en) | 2014-05-20 | 2015-05-20 | Method, system and computer program product for controlling a filter regeneration process |
| PCT/SE2015/050583 WO2015178848A1 (en) | 2014-05-20 | 2015-05-20 | Method, system and computer program product for controlling a filter regeneration process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE1450591A SE537999C2 (en) | 2014-05-20 | 2014-05-20 | Method, system and computer program to control a regeneration process for filters |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE1450591A1 SE1450591A1 (en) | 2015-11-21 |
| SE537999C2 true SE537999C2 (en) | 2016-02-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE1450591A SE537999C2 (en) | 2014-05-20 | 2014-05-20 | Method, system and computer program to control a regeneration process for filters |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP3145616A4 (en) |
| SE (1) | SE537999C2 (en) |
| WO (1) | WO2015178848A1 (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN118341412B (en) * | 2024-06-05 | 2024-09-17 | 徐州华睿炭材料科技有限公司 | Waste activated carbon recovery, washing and regeneration device |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4277255A (en) * | 1979-03-01 | 1981-07-07 | Aktiebolaget Svenska Flaktfabriken | Cleaning process control method for textile barrier filter material |
| DD228176A1 (en) * | 1984-10-09 | 1985-10-09 | Freiberg Brennstoffinst | METHOD FOR MONITORING THE POLLUTION GRADE OF GAS STREAM FILTERS |
| JPH09206536A (en) * | 1996-02-07 | 1997-08-12 | Ngk Insulators Ltd | Method for backwashing filter in dust collector |
| US6711525B1 (en) * | 1999-04-17 | 2004-03-23 | Pneumatic Products Corporation | Filter monitor |
| US6377171B1 (en) * | 1999-09-15 | 2002-04-23 | Peerless Mfg. Co. | On-line filter monitoring system |
| DE10260784A1 (en) * | 2002-12-23 | 2004-07-01 | Daimlerchrysler Ag | Method for monitoring the degree of contamination of a filter device |
| US7261762B2 (en) * | 2004-05-06 | 2007-08-28 | Carrier Corporation | Technique for detecting and predicting air filter condition |
-
2014
- 2014-05-20 SE SE1450591A patent/SE537999C2/en unknown
-
2015
- 2015-05-20 WO PCT/SE2015/050583 patent/WO2015178848A1/en not_active Ceased
- 2015-05-20 EP EP15796654.0A patent/EP3145616A4/en not_active Withdrawn
Also Published As
| Publication number | Publication date |
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| EP3145616A4 (en) | 2018-03-07 |
| EP3145616A1 (en) | 2017-03-29 |
| WO2015178848A1 (en) | 2015-11-26 |
| SE1450591A1 (en) | 2015-11-21 |
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