CN113144801B - Device and method for treating waste gas containing organic volatile matters and device for drying adhesive coated product - Google Patents
Device and method for treating waste gas containing organic volatile matters and device for drying adhesive coated product Download PDFInfo
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- CN113144801B CN113144801B CN202110306450.3A CN202110306450A CN113144801B CN 113144801 B CN113144801 B CN 113144801B CN 202110306450 A CN202110306450 A CN 202110306450A CN 113144801 B CN113144801 B CN 113144801B
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- 239000002912 waste gas Substances 0.000 title claims abstract description 149
- 238000000034 method Methods 0.000 title claims abstract description 31
- 239000004819 Drying adhesive Substances 0.000 title description 2
- 239000007789 gas Substances 0.000 claims abstract description 177
- 238000004519 manufacturing process Methods 0.000 claims abstract description 125
- 239000000428 dust Substances 0.000 claims abstract description 99
- 238000010438 heat treatment Methods 0.000 claims abstract description 36
- 238000000926 separation method Methods 0.000 claims abstract description 20
- 239000003039 volatile agent Substances 0.000 claims description 35
- 238000001035 drying Methods 0.000 claims description 19
- 238000000197 pyrolysis Methods 0.000 claims description 18
- 239000007921 spray Substances 0.000 claims description 16
- 238000012546 transfer Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
- 238000005336 cracking Methods 0.000 claims description 12
- 239000000853 adhesive Substances 0.000 claims description 10
- 230000001070 adhesive effect Effects 0.000 claims description 10
- 150000003839 salts Chemical class 0.000 claims description 5
- 238000000746 purification Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000002245 particle Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 8
- 238000001179 sorption measurement Methods 0.000 description 7
- 239000011248 coating agent Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 239000003960 organic solvent Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 239000003292 glue Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000006303 photolysis reaction Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000903 blocking effect Effects 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 2
- 239000005416 organic matter Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000002028 Biomass Substances 0.000 description 1
- 206010044565 Tremor Diseases 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 150000003384 small molecules Chemical class 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
-
- 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
-
- 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
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/0036—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions by adsorption or absorption
-
- 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
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/74—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element
- B01D46/76—Regeneration of the filtering material or filter elements inside the filter by forces created by movement of the filter element involving vibrations
-
- 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
- B01D46/90—Devices for taking out of action one or more units of multi-unit filters, e.g. for regeneration or maintenance
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/005—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by heat treatment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D—PROCESSES FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05D3/00—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials
- B05D3/04—Pretreatment of surfaces to which liquids or other fluent materials are to be applied; After-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by exposure to gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/061—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases with supplementary heating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses an organic volatile matter-containing waste gas treatment device and method, wherein the device comprises a first waste gas treatment mechanism and a second waste gas treatment mechanism; the first exhaust gas treatment mechanism comprises a first exhaust gas collecting pipe and heating and purifying equipment for removing organic volatile matters; the second waste gas treatment mechanism comprises a second waste gas collecting pipe, dust separation equipment, a second waste gas discharge pipe and an air valve, wherein an air outlet of the second waste gas discharge pipe is used for being connected with a fresh air inlet of the first production section, and an air inlet of the second waste gas collecting pipe is used for being connected with an air outlet of the second production section. The exhaust gas treatment device can remove organic volatile matters in exhaust gas as fully as possible, improve the safety of exhaust gas treatment and reduce the cost of exhaust gas treatment.
Description
Technical Field
The invention relates to the technical field of waste gas treatment, in particular to a waste gas treatment device and method containing organic volatile matters and a drying device for adhesive coating products.
Background
The production process of adhesive tapes and the like generally requires a coating process. In particular, the coating process often involves transferring solvent-based glues to the substrate surface, and then evaporating the solvent therein through a high temperature oven and curing the tacky material therein. In this process, a large amount of exhaust gas containing organic volatile matter and even dust is generated, and there is no uniform way for treating the exhaust gas in the industry.
In the prior art, part of manufacturers perform activated carbon adsorption and photodecomposition treatment on waste gas generated in the drying process and then discharge the waste gas so as to avoid the waste gas from polluting the atmosphere. However, it is difficult to sufficiently remove the organic volatile matter in the exhaust gas in such a treatment mode, and the treated exhaust gas still contains a considerable amount of organic volatile matter, so that the emission does not reach the standard. There are also some traditional techniques for treating tail gas by adopting an incineration mode, but on one hand, the tail gas contains organic volatile matters and solid small particles, explosion is easily caused by careless operation in the actual operation process, on the other hand, the concentration of the organic volatile matters in the discharged tail gas is low, a large amount of gas is required to be directly subjected to incineration treatment, so that the gas is heated to the ignition point of the organic volatile matters, a large amount of energy is required to be consumed, and the actual operation cost is too high.
Disclosure of Invention
In view of this, in order to improve the safety of exhaust gas treatment and reduce the cost of exhaust gas treatment while removing organic volatiles in the exhaust gas as sufficiently as possible, it is necessary to provide an exhaust gas treatment device containing organic volatiles, and further, to provide a specific application thereof and a corresponding exhaust gas treatment method containing organic volatiles.
An organic volatile matter-containing waste gas treatment device for treating an organic volatile matter-containing waste gas generated by a production facility having a first production section for discharging a first waste gas and a second production section for discharging a second waste gas; the device is characterized by comprising a first waste gas treatment mechanism and a second waste gas treatment mechanism;
The first waste gas treatment mechanism comprises a first waste gas collecting pipe and heating and purifying equipment for removing organic volatile matters, an air inlet of the first waste gas collecting pipe is used for being connected with an air outlet of the first production section, and an air outlet of the first waste gas collecting pipe is connected with an air inlet of the heating and purifying equipment;
The second waste gas treatment mechanism comprises a second waste gas collecting pipe, dust separation equipment, a second waste gas discharge pipe and a gas valve, wherein the second waste gas collecting pipe is provided with a first gas outlet and a second gas outlet, the second waste gas discharge pipe is provided with a first gas inlet and a second gas inlet, and the gas valve is used for controlling the flow direction of second waste gas; the first air outlet is connected with the first air inlet, the second air outlet is connected with the second air inlet, and the dust separation equipment is arranged between the second air outlet and the second air inlet;
the gas outlet of the second waste gas discharge pipe is used for being connected with the fresh air port of the first production section, and the gas inlet of the second waste gas collecting pipe is used for being connected with the gas outlet of the second production section.
In one embodiment, the dust separation device is selected from one or a combination of multiple devices of a dust filter, a spray tower and a centrifugal separator.
In one embodiment, the dust separation device comprises a dust filter and a spray tower which are connected, wherein the air inlet of the dust filter is connected with the second air outlet, and the air outlet of the spray tower is connected with the second air inlet.
In one embodiment, the heating and purifying device is a pyrolysis furnace or an incinerator.
In one embodiment, the first exhaust treatment mechanism further comprises a preheating device for preheating the first exhaust.
In one embodiment, the preheating device comprises a first heat exchanger for transferring heat of the heating and purifying device to the first exhaust gas collecting pipe.
In one embodiment, the first heat exchanger is further used for transferring or exchanging heat of the heating and purifying device to the first production section and/or the second production section for roasting heating.
In one embodiment, the first heat exchanger is selected from a heat transfer oil heat exchanger or a molten salt heat exchanger.
In one embodiment, the system further comprises a second heat exchanger and a gas supply pipe, wherein the gas supply pipe is used for connecting the second production section and supplying gas to the second production section, and the second heat exchanger is used for transferring heat in the gas discharged by the heating and purifying equipment to the gas supply pipe.
Further, an adhesive coated product drying device comprising a production facility and an organic volatile waste gas treatment device according to any of the above embodiments, the production facility having a second production section for discharging a second waste gas and a first production section for discharging a first waste gas, the second production section comprising a second oven and a second drying station arranged in the second oven, the first production section comprising a first oven and a first drying station arranged in the first oven.
A method of treating an organic volatile-containing waste gas comprising a second waste gas discharged from a second production section of a production facility and a first waste gas discharged from a first production section, the method comprising the steps of:
When the second waste gas contains dust, separating the dust in the second waste gas from the second waste gas, and then introducing the second waste gas after removing the dust into the first production section; when the second waste gas does not contain dust, the second waste gas is led into the first production section;
incinerating or cracking the first exhaust gas to remove organic volatiles in the first exhaust gas.
In one embodiment, the way to remove the organic volatiles in the first exhaust gas is pyrolysis or incineration.
In one embodiment, the method further comprises the following steps:
Preheating the first exhaust gas using heat generated in a process of incinerating or cracking the organic volatile substances; and/or
The second production section and the first production section are heated by heat generated by a process of incinerating or cracking the organic volatiles.
The inventors have specifically devised the treatment device for practical features such as during the coating and drying of adhesive products. In particular, since the adhesive product coating and drying process is typically an in-line process, the evaporation of the organic solvent mainly occurs in the forward portion of the line, and solidification of the solute therein does not substantially occur, so that the concentration of organic volatiles in the exhaust gas of this portion is higher and the dust content is lower. The solidification of the solute mainly takes place in the latter part of the line, whereby the concentration of organic volatiles in the exhaust gas of this part is low, but may contain dust. The equipment for generating the waste gas by the waste gas treatment device containing the organic volatile matters is divided into the first production section and the second production section, the concentration of the organic volatile matters in the first waste gas is high, the concentration of the organic volatile matters in the second waste gas is low, and the second waste gas treatment mechanism and the first waste gas treatment mechanism are designed in a targeted manner.
The exhaust gas treatment device containing the organic volatile matters has at least the following beneficial effects:
The second waste gas is firstly screened, and the second waste gas containing dust is introduced into the first production section through the second waste gas discharge pipe after passing through the dust separation equipment, so that the second waste gas can be used as the original gas in the first production section and is mixed with the organic volatile matters generated in the first production section to form the first waste gas. Compared with directly introducing air as the original gas, on one hand, the second waste gas contains a certain amount of organic volatile matters, the concentration of the organic volatile matters is obviously improved in the process of forming the first waste gas, and on the other hand, the temperature of the second waste gas is obviously higher than the room temperature, and no further heating treatment is needed.
More importantly, the waste gas generating equipment is not divided into a second production section and a first production section in the prior art, which is equivalent to that one part of gas is respectively introduced into the second production section and the first production section to take away organic volatile matters. The waste gas treatment device is equivalent to containing all organic volatile matters in the second waste gas and the first waste gas by only adopting one part of input gas, and the device for selectively separating dust is also designed according to the characteristics of the second waste gas, so that the finally generated first waste gas does not contain dust, the concentration of the organic volatile matters in the finally generated first waste gas is obviously higher, and the energy source required for heating the first waste gas can be effectively saved.
Drawings
FIG. 1 is a schematic diagram of an embodiment of an exhaust treatment device containing organic volatiles;
wherein, each reference sign and explanation are as follows:
10. A first production section; 110. a first exhaust gas collection pipe; 120. heating the purifying device; 20. a second production section; 210. a second exhaust gas collection pipe; 211. a first air outlet; 212. a second air outlet; 220. a dust separation device; 221. a dust filter; 222. a spray tower; 230. a second exhaust gas discharge pipe; 231. a first air inlet; 232. a second air inlet; 240. an air valve; 250. an air supply pipe; 310. a first heat exchanger; 320. and a second heat exchanger.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. As used herein, "multiple" includes two and more items. As used herein, "above a certain number" should be understood to mean a certain number and a range of numbers greater than a certain number.
According to one embodiment of the present invention, an organic volatile matter-containing waste gas treatment apparatus for treating an organic volatile matter-containing waste gas produced by a production facility having a first production section for discharging a first waste gas and a second production section for discharging a second waste gas; which includes a first exhaust treatment mechanism and a second exhaust treatment mechanism. It will be appreciated that the first and second production sections require exhaust gas to be vented during production and thus have vents; at the same time, it also needs to be aerated, so it also has a fresh air port.
The first waste gas treatment mechanism comprises a first waste gas collecting pipe and heating and purifying equipment for removing organic volatile matters, an air inlet of the first waste gas collecting pipe is used for being connected with an air outlet of the first production section, and the air outlet of the first waste gas collecting pipe is connected with the air inlet of the heating and purifying equipment;
the second waste gas treatment mechanism comprises a second waste gas collecting pipe, dust separation equipment, a second waste gas discharge pipe and an air valve, wherein the second waste gas collecting pipe is provided with a first air outlet and a second air outlet, the second waste gas discharge pipe is provided with a first air inlet and a second air inlet, the first air outlet is connected with the first air inlet, and the second air outlet is connected with the second air inlet and is provided with the dust separation equipment; the air valve is used for controlling the flow direction of the second waste gas, in particular controlling the second waste gas to flow out of the first air outlet or the second air outlet; the air inlet of the second exhaust gas collecting pipe is used for being connected with the air outlet of the second production section, and the air outlet of the second exhaust gas discharging pipe is used for being connected with the fresh air outlet of the first production section.
Further, referring to fig. 1, a specific implementation of an exhaust gas treatment device containing organic volatiles according to the present invention is shown, which includes a first exhaust gas treatment mechanism and a second exhaust gas treatment mechanism. The concentration of organic volatiles in the second exhaust gas is lower than the concentration of organic volatiles in the first exhaust gas.
Specifically, the second exhaust gas treatment mechanism includes a second exhaust gas collection pipe 210, a dust separation device 220, a second exhaust gas discharge pipe 230, and an air valve 240, the second exhaust gas collection pipe 210 having a first air outlet 211 and a second air outlet 212, the second exhaust gas collection pipe 210 for receiving the second exhaust gas generated from the second production section 20. The second exhaust gas in the second exhaust gas collecting pipe 210 may flow out from the first gas outlet 211 and/or out from the second gas outlet 212, and the gas valve 240 is used to control the outflow port of the second exhaust gas.
In one specific example, the air valve 240 is a three-way valve disposed in the second exhaust pipe, two outlet ends of the three-way valve are respectively connected with branch pipes of the second exhaust gas collecting pipe 210, wherein one branch pipe is terminated by the first air outlet 211, and the other branch pipe is terminated by the second air outlet 212. One of the outlets of the three-way valve directs the gas to the first gas outlet 211 and the other outlet directs the gas to the second gas outlet 212. Referring to fig. 1, a three-way valve is shown closing a manifold having a first gas outlet 211 and directing gas to a manifold having a second gas outlet 212.
The second exhaust gas discharge pipe 230 has a first air inlet 231 and a second air inlet 232, and the first air outlet 211 is connected to the first air inlet 231. As shown in fig. 1, the first air outlet 211 is directly connected to the first air inlet 231, and then the first air outlet 211 coincides with the actual position of the first air inlet 231, which is marked with brackets in the reference numerals.
The second air outlet 212 is connected to the second air inlet 232 with the dust separating apparatus 220 disposed therebetween. Specifically, the second air outlet 212 is connected to an air inlet of the dust separation device 220, so that the second exhaust air can flow into the dust separation device 220, and the dust separation device 220 is used for removing dust particles in the second exhaust air. The second exhaust gas passing through the dust separating device 220 enters the second exhaust gas discharge pipe 230 through the second air inlet 232.
It will be appreciated that when the second exhaust gas does not contain dust, the second exhaust gas should be controlled to flow out of the first air outlet 211, but may also flow out of the second air outlet 212, in consideration of cost and the like.
The second exhaust gas discharge pipe 230 is used for leading out the treated or untreated second exhaust gas. Specifically, the outlet end of the second exhaust gas discharge pipe 230 is used to connect the first production section 10 to introduce the second exhaust gas into the first production section 10.
It will be appreciated that the concentration of organic volatiles in the second offgas is relatively low and the concentration of organic volatiles in the first offgas is relatively high, so that after the second offgas has flowed into the first production stage 10, the organic volatiles produced in the first production stage 10 are mixed into the second offgas to form the first offgas. On the one hand, the amount of organic volatiles produced in the first production section 10 is substantially higher than the amount of organic volatiles produced in the second production section 20, and on the other hand, the concentration of organic volatiles in the first exhaust gas obtained by introducing the second exhaust gas as ambient atmosphere into the first production section 10 can be further increased compared to the first exhaust gas obtained by introducing air into the first production section 10. In the subsequent purification treatment, the amount and the purification speed at which the first exhaust gas having a higher concentration of organic volatiles is purified can be significantly increased as compared with the case where the second exhaust gas and the first exhaust gas are treated separately or mixed and then treated.
In one specific example, the dust separation device 220 is selected from one or a combination of multiple devices of a dust filter 221, a spray tower 222, and a centrifugal separator. For example, the dust separation device 220 may be a separate dust filter 221, a spray tower 222, a centrifugal separator, a combination of the dust filter 221 and the spray tower 222, or the like.
It will be appreciated that the dust filter 221 is a device that removes solid particles from the exhaust gas by adsorption or blocking. For example, the dust filter 221 may be a filter using a filter mesh as a blocking material, or may be a filter using activated carbon as an adsorption material. The spray tower 222 is a device that separates dust in the second exhaust gas from the exhaust gas by spraying a liquid. The centrifugal separator is a device for separating solid dust with high density from waste gas in a centrifugal way.
In one specific example, the dust separation apparatus 220 includes a dust filter 221 and a spray tower 222 connected, the air inlet of the dust filter 221 is connected to the second air outlet 212, and the air outlet of the spray tower 222 is connected to the second air inlet 232. It will be appreciated that the dust filter 221 is connected to the spray tower 222 via an air duct, and that the second exhaust gas passes through the dust filter 221 and then through the spray tower 222. The dust filter 221 can remove dust with larger particles, and the spray tower 222 can further remove small particle dust that is difficult to filter by the filter.
In one specific example, the dust filter 221 includes an air inlet switching valve, a plurality of dust chambers, and a tremble motor and filter provided corresponding to each of the dust chambers; the dust chamber is provided with an air inlet and an air outlet, a dust collecting part is also arranged in the dust chamber, and a filter is arranged in the dust chamber and is positioned above the air inlet and the dust collecting part; the shake motor is connected with the filter and is used for shaking off dust adsorbed on the filter; the air inlet switching valve is arranged at the air inlet of each dust removing chamber and used for controlling the opening of the air inlet in each dust removing chamber.
The traditional filter can adsorb a large amount of dust gradually in the use, and the filter effect can reduce gradually along with the increase of adsorption dust volume. And still need manual taking out to wash after certain time, waste time and energy, still need stop the operation of dust remover, reduce work efficiency.
The dust filter 221 has a plurality of dust chambers, and in actual operation, the air inlet switching valve can be switched according to the operation time length to switch the dust chambers communicated with the air inlet pipe. At the moment, one of the dust chambers is communicated with the air inlet pipe, so that the dust remover can still work normally. And the air inlet of the other dust removing chamber is closed, the shake motor corresponding to the closed dust removing chamber is started and shakes off dust adsorbed on the filter, and the automatic cleaning of the filter in the closed dust removing chamber is completed.
Further, the filter component is a filter screen, and a plurality of groups of filter holes with different pore diameters are arranged in the filter screen. In the adjacent group of filter holes, the aperture of the filter hole close to the air inlet is larger than that of the filter hole close to the air outlet. After dust enters the dust removal chamber along with the waste gas, the dust firstly contacts with the filter holes with larger aperture, the dust of larger particles in the waste gas is firstly adsorbed and blocked by the filter holes with larger aperture and is adsorbed on the filter screen at the filter holes with larger aperture, and then the smaller particles are blocked by the filter holes with smaller aperture and are adsorbed on the filter screen at the filter holes with smaller aperture. Through setting up the netted filter that has specific filtration pore structure, can improve the filtration efficiency and the cleaning efficiency of filter in the dust remover room, simplify the inside structural design of dust remover.
In one specific example, the first exhaust gas treatment mechanism comprises a first exhaust gas collecting pipe 110 and a heating and purifying device 120, an air inlet of the first exhaust gas collecting pipe 110 is used for being connected with an air outlet of the first production section 10, and an air outlet of the first exhaust gas collecting pipe 110 is connected with an organic volatile matter purifier;
in one specific example, the heating and purifying apparatus 120 is a pyrolysis furnace or an incinerator.
Pyrolysis is a treatment means that breaks bonds of organic matter by high temperature and breaks down the organic matter into gaseous small molecules, which can be further oxidized into carbon dioxide and water. Incineration is a treatment means for directly oxidizing and bond-breaking organic matters to form carbon dioxide and water. Whether cracking or incineration, requires treatment in a relatively high temperature environment. For example, the temperatures required for pyrolysis may need to be above 700 ℃ and the temperatures required for incineration are relatively low, but generally need to be performed in an oxygen or oxygen-containing environment. Incinerator and cracker furnaces typically require an external heat source to heat up during operation. The heating mode can be an electric heating mode, a natural gas heating mode, a coal heating mode or a biomass heating mode.
It will be appreciated that in actual operation, the first exhaust gas is in a state of continuous discharge, and thus it is necessary to ensure that the first exhaust gas is rapidly reacted and removed while passing through the incinerator or the pyrolysis furnace, otherwise organic volatiles in the first exhaust gas are difficult to be sufficiently purified and discharged.
In a specific example, the first exhaust treatment mechanism further comprises a preheating device for preheating the first exhaust.
Further, the preheating device includes a first heat exchanger 310, and the first heat exchanger 310 is used to transfer heat of the pyrolysis furnace or the incinerator to the first exhaust gas collection pipe 110.
On the one hand, the cracking furnace or the incinerator is in a higher temperature state; on the other hand, the reaction of cracking or incinerating the organic volatile substances in the cracking furnace or the incinerator is exothermic, and can continuously emit heat. Therefore, the embodiment of the invention also provides a technical scheme for recovering the heat of the cracking furnace or the incinerator.
A heat exchanger is a device that can transfer heat from a hot fluid to a cold fluid to meet specified process requirements, and is an industrial application of convective heat transfer and thermal conduction. Typically, heat exchangers are both conductive fluids and containers containing the conductive fluids. The vessel containing the thermally conductive fluid may be tubular. Specifically, the first heat exchanger 310 may be selected from the group consisting of a divided wall type first heat exchanger 310.
Further, the first heat exchanger 310 may be selected from a conduction oil heat exchanger or a molten salt heat exchanger. The heat transfer oil heat exchanger refers to a heat exchanger using heat transfer oil as a heat transfer medium, and the molten salt heat exchanger refers to a heat exchanger using molten salt as a heat transfer medium.
One end of the first heat exchanger 310 may be disposed near or in contact with the pyrolysis furnace or the incinerator, and the other end may be disposed near or in contact with the first exhaust gas collection pipe 110 to achieve preheating of the first exhaust gas. The first waste gas is preheated, so that the initial temperature of the first waste gas when entering the incinerator or the cracking furnace is effectively improved, the reaction rate of organic volatile matters in the first waste gas is accelerated, and the treatment efficiency of the organic volatile matters is improved.
Further, the first heat exchanger 310 is also used to transfer the heat of the pyrolysis furnace or incinerator to the second production section 20 for heating the second production section 20, gasifying the organic volatiles in the second production section 20 and entering the second exhaust gas, which is carried out with the second exhaust gas. There are a number of practical ways to transfer the heat of the pyrolysis furnace or incinerator to the second production section 20.
In one particular example, such as that shown in fig. 1, the first heat exchanger 310 that would otherwise be used to preheat the first exhaust gas can be extended to the second production section 20, and the first heat exchanger 310 can be used to preheat not only the first exhaust gas, but also the second production section 20.
Further, the first heat exchanger 310 is also used to transfer the heat of the pyrolysis furnace or incinerator to the first production section 10 for heating the first production section 10, so that the organic volatile in the first production section 10 enters the second exhaust gas and is carried out with the second exhaust gas. The first heat exchanger 310 may be additionally provided or the piping of the first heat exchanger 310 for preheating the first exhaust gas may be extended to the first production section 10.
In one particular example, the first heat exchanger 310, which would otherwise be used to preheat the first exhaust gas, may be extended to the first production section 10 and/or the second exhaust gas discharge pipe 230 to transfer the heat of the pyrolysis furnace or incinerator to the first production section 10.
In one specific example, the exhaust gas treatment device further comprises a second heat exchanger 320 and a gas supply pipe 250, wherein the gas outlet of the gas supply pipe 250 is connected to the gas inlet of the second production section 20, and the second heat exchanger 320 is used for transferring heat in the gas discharged from the heating and purifying apparatus 120 to the gas supply pipe 250. For example, a second heat exchanger 320 is disposed between the gas supply pipe 250 and the chimney of the heating and purifying apparatus 120, and the second heat exchanger 320 can transfer heat contained in the gas discharged from the pyrolysis furnace or the incinerator to the gas in the gas supply pipe 250, and the heated gas is then introduced into the second production section 20.
In the drying process after application of glue, such as adhesive products, it is common to carry out the drying process on a line which is entirely placed in an oven. In the drying process, the solvent-type glue can volatilize an organic solvent, solidify the solute and the like, and a large amount of organic volatile matters, solid small particles and the like can be generated frequently. In the prior art, the method is either left alone or directly adsorbed or photodecomposition to remove the organic volatile matters and dust, so that the pollutants cannot be removed sufficiently, and the adsorption effect of the adsorption medium is gradually deteriorated along with the use time.
The tail gas is usually treated by adopting an adsorption or photodecomposition mode in the prior art, on one hand, because the tail gas contains organic volatile matters and small solid particles, explosion is easily caused by careless operation in the actual operation process. On the other hand, because the concentration of the organic volatile matters in the discharged tail gas is low, a large amount of gas needs to be heated to the ignition point for the direct incineration treatment, and a large amount of energy is consumed.
The inventor designs the processing device in a targeted way according to the practical characteristics of the adhesive product in the coating and drying process. In particular, since the adhesive product coating and drying process is typically an in-line process, the evaporation of the organic solvent mainly occurs in the forward portion of the line, and solidification of the solute therein does not substantially occur, so that the concentration of organic volatiles in the exhaust gas of this portion is higher and the dust content is lower. The solidification of the solute mainly takes place in the latter part of the line, whereby the concentration of organic volatiles in the exhaust gas of this part is low, but may contain dust. In view of this feature, the inventors split the apparatus for generating the exhaust gas containing the organic volatile matter into the first production section 10 and the second production section 20, the second exhaust gas having a low concentration of the organic volatile matter and the first exhaust gas having a high concentration of the organic volatile matter, and purposely designed the first exhaust gas treatment mechanism and the second exhaust gas treatment mechanism.
The exhaust gas treatment device containing the organic volatile matters has at least the following beneficial effects:
The second waste gas is first screened, and the second waste gas containing dust is introduced into the first production section 10 through the second waste gas discharge pipe 230 after passing through the dust separation device 220, and the second waste gas can be used as raw gas in the first production section 10 and is mixed with organic volatile matters generated in the first production section 10 to form first waste gas. Compared with directly introducing air as the original gas, on one hand, the second waste gas contains a certain amount of organic volatile matters, the concentration of the organic volatile matters is obviously improved in the process of forming the first waste gas, and on the other hand, the temperature of the second waste gas is obviously higher than the room temperature, and no further heating treatment is needed.
More importantly, the conventional technology does not divide the waste gas generating device into the second production section 20 and the first production section 10, which is equivalent to introducing a part of gas into each of the first production section 10 and the second production section 20 to carry away the organic volatile matters. The waste gas treatment device is equivalent to containing all organic volatile matters in the second waste gas and the first waste gas by only adopting one part of input gas, and the device for selectively separating dust is also designed according to the characteristics of the second waste gas, so that the finally generated first waste gas does not contain dust, the concentration of the organic volatile matters in the finally generated first waste gas is obviously higher, and the energy source required for heating the first waste gas can be effectively saved.
Further, the above-mentioned exhaust gas treatment device containing organic volatile matter also provides a preferred implementation scheme with an energy recovery device.
The energy recovery device includes a first heat exchanger 310 to preheat the first exhaust gas by using heat of a heating pyrolysis furnace or an incinerator and heat generated by pyrolysis or combustion of organic volatiles, thereby improving pyrolysis combustion efficiency of the first exhaust gas. Further, the energy recovery device can heat the first production section 10 and the second production section 20, so as to accelerate the volatilization of the organic solvent therein and reduce the energy required by external heating of the first production section 10 and the second production section 20. With the above arrangement, after the initial start-up heat is provided, stable operation of the system can be maintained without inputting heat to the first production section 10 and the second production section 20.
Furthermore, the invention also provides application of the organic volatile waste gas treatment device in the drying process of the adhesive coating product.
Specifically, the invention also provides an adhesive coated product drying device, which comprises production equipment and the organic volatile matter waste gas treatment device according to the embodiment, wherein the production equipment is provided with a first production section for discharging first waste gas and a second production section for discharging second waste gas, the first production section comprises a first oven and a first drying station arranged in the first oven, and the second production section comprises a second oven and a second drying station arranged in the second oven.
It will be appreciated that the second oven and the first oven may be separate ovens or may be two sections within one oven that are spaced apart without substantial change.
An embodiment of the present invention also provides a method for treating an organic volatile-containing waste gas including a first waste gas discharged from a first production section and a second waste gas discharged from a second production section of a production apparatus, the method comprising the steps of:
when the second waste gas contains dust, separating the dust in the second waste gas from the second waste gas, and then introducing the second waste gas after dust removal into the first production section; when the second waste gas does not contain dust, the second waste gas is led into the first production section;
the first exhaust gas is heated to remove organic volatiles from the first exhaust gas.
Further, the method also comprises the following steps:
the production equipment for producing the waste gas containing the organic volatile matters is divided into a second production section and a first production section, the second production section produces the second waste gas, the first production section produces the first waste gas, and the concentration of the organic volatile matters in the second waste gas is lower than that in the first waste gas.
In one specific example, the way to remove the organic volatiles in the first exhaust gas is pyrolysis or incineration.
In one specific example, the method for treating the exhaust gas containing the organic volatile matter further comprises:
preheating the first exhaust gas by using heat generated in a process of heating the organic volatile matter; and/or
The second production section and the first production section are heated using heat generated by the process of heating the organic volatiles.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (9)
1. An organic volatile matter-containing waste gas treatment device for treating an organic volatile matter-containing waste gas generated by a production facility having a first production section for discharging a first waste gas and a second production section for discharging a second waste gas; the device is characterized by comprising a first waste gas treatment mechanism and a second waste gas treatment mechanism;
The first waste gas treatment mechanism comprises a first waste gas collecting pipe and heating and purifying equipment for removing organic volatile matters, an air inlet of the first waste gas collecting pipe is used for being connected with an air outlet of the first production section, and an air outlet of the first waste gas collecting pipe is connected with an air inlet of the heating and purifying equipment; the first exhaust treatment mechanism further comprises a preheating device for preheating the first exhaust, the preheating device comprising a first heat exchanger for transferring heat of the heating purification device to the first exhaust collection pipe;
The second waste gas treatment mechanism comprises a second waste gas collecting pipe, dust separation equipment, a second waste gas discharge pipe and a gas valve, wherein the second waste gas collecting pipe is provided with a first gas outlet and a second gas outlet, the second waste gas discharge pipe is provided with a first gas inlet and a second gas inlet, and the gas valve is used for controlling the flow direction of second waste gas; the first air outlet is connected with the first air inlet, the second air outlet is connected with the second air inlet, and the dust separation equipment is arranged between the second air outlet and the second air inlet;
The air outlet of the second waste gas discharge pipe is used for being connected with a fresh air outlet of the first production section, and the air inlet of the second waste gas collecting pipe is used for being connected with an air outlet of the second production section;
The exhaust gas treatment device containing organic volatile matters further comprises a second heat exchanger and a gas supply pipe, wherein the gas supply pipe is used for connecting the second production section and supplying gas to the second production section, and the second heat exchanger is used for transferring heat in the gas exhausted by the heating and purifying equipment to the gas supply pipe.
2. The exhaust gas treatment device containing organic volatiles according to claim 1, wherein said dust separation means is selected from one or a combination of a plurality of means of a dust filter, a spray tower and a centrifugal separator.
3. The exhaust gas treatment device containing organic volatiles according to claim 2, wherein said dust separating means comprises a dust filter and a spray tower connected, said dust filter having an air inlet connected to said second air outlet, said spray tower having an air outlet connected to said second air inlet.
4. The exhaust gas treatment device containing organic volatiles according to claim 1, characterized in that the heating and purifying means is a pyrolysis furnace or an incinerator.
5. The exhaust gas treatment device containing organic volatiles according to any one of claims 1 to 4, characterized in that the first heat exchanger is further used for transferring or exchanging heat of the heating and purifying apparatus to the first production section and/or the second production section for baking and heating.
6. The exhaust gas treatment device containing organic volatiles according to claim 5, characterized in that the first heat exchanger is selected from a heat transfer oil heat exchanger or a molten salt heat exchanger.
7. An adhesive coated product drying device, characterized by comprising production equipment and the organic volatile matter-containing waste gas treatment device according to any one of claims 1-6, wherein the production equipment is provided with a second production section for discharging second waste gas and a first production section for discharging first waste gas, the second production section comprises a second oven and a second drying station arranged in the second oven, and the first production section comprises a first oven and a first drying station arranged in the first oven.
8. A method for treating an exhaust gas containing an organic volatile matter, characterized in that the exhaust gas containing an organic volatile matter according to any one of claims 1 to 6 is used, the exhaust gas containing an organic volatile matter including a second exhaust gas discharged from a second production section and a first exhaust gas discharged from a first production section of a production apparatus, the method comprising the steps of:
When the second waste gas contains dust, separating the dust in the second waste gas from the second waste gas, and then introducing the second waste gas after removing the dust into the first production section; when the second waste gas does not contain dust, the second waste gas is led into the first production section;
incinerating or cracking the first exhaust gas to remove organic volatiles in the first exhaust gas.
9. The method for treating exhaust gas containing organic volatiles according to claim 8, further comprising the step of:
Preheating the first exhaust gas using heat generated in a process of incinerating or cracking the organic volatile substances; and/or
The second production section and the first production section are heated by heat generated by a process of incinerating or cracking the organic volatiles.
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