CN112076584A - High-temperature high-humidity gas whitening component and method and DMF (dimethyl formamide) and toluene recovery device - Google Patents
High-temperature high-humidity gas whitening component and method and DMF (dimethyl formamide) and toluene recovery device Download PDFInfo
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- CN112076584A CN112076584A CN202010762153.5A CN202010762153A CN112076584A CN 112076584 A CN112076584 A CN 112076584A CN 202010762153 A CN202010762153 A CN 202010762153A CN 112076584 A CN112076584 A CN 112076584A
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- waste gas
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- adsorption tank
- temperature
- recovery
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 title claims abstract description 58
- 238000011084 recovery Methods 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 9
- 230000002087 whitening effect Effects 0.000 title claims description 17
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 title abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 50
- 238000001179 sorption measurement Methods 0.000 claims abstract description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 22
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 15
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 11
- 230000000630 rising effect Effects 0.000 claims abstract description 10
- 239000000498 cooling water Substances 0.000 claims abstract description 5
- 239000002912 waste gas Substances 0.000 claims description 58
- 238000001035 drying Methods 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 20
- QKIUAMUSENSFQQ-UHFFFAOYSA-N dimethylazanide Chemical compound C[N-]C QKIUAMUSENSFQQ-UHFFFAOYSA-N 0.000 claims description 8
- 238000007664 blowing Methods 0.000 claims description 4
- 238000009833 condensation Methods 0.000 claims description 4
- 230000005494 condensation Effects 0.000 claims description 4
- 241000276489 Merlangius merlangus Species 0.000 claims 1
- 230000000007 visual effect Effects 0.000 abstract description 2
- 235000019504 cigarettes Nutrition 0.000 abstract 1
- 230000008030 elimination Effects 0.000 abstract 1
- 238000003379 elimination reaction Methods 0.000 abstract 1
- 238000003795 desorption Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 210000000697 sensory organ Anatomy 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
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- 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
- B01D53/002—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 condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0033—Other features
- B01D5/0054—General arrangements, e.g. flow sheets
-
- 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
- B01D53/02—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 adsorption, e.g. preparative gas chromatography
- B01D53/04—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 adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0438—Cooling or heating systems
-
- 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
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
-
- 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
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention discloses a high-temperature high-humidity gas de-whitening component, a method and a DMF (dimethyl formamide) and methylbenzene recovery device. Utilize one-level cooler bin (cooling water), second grade cooler bin (refrigerated water) or with the moisture content in the vapor cooling gets rid of gas through mechanical type defroster again, insert the active carbon adsorption jar after the debugging of rising the temperature again, so circulate many times make gas can reach emission temperature and humidity rapidly, the visual effect of the white cigarette that produces during the gas emission of elimination.
Description
Technical Field
The invention relates to a high-temperature high-humidity gas de-whitening assembly and method and a DMF (dimethyl formamide) and methylbenzene recovery device.
Background
Due to steam desorption of the activated carbon adsorption organic solvent, a large amount of water vapor is generated in the drying and cooling process after the steam desorption is finished and is directly discharged into the atmosphere, so that the air is polluted visually and organoleptically. Therefore, the white removal treatment needs to be performed before the exhaust gas (steam) is discharged, but the conventional white removal treatment device has a single structure and can only be used for white removal, and each part does not fully play a role.
Disclosure of Invention
The invention aims to provide a multi-mode high-temperature high-humidity gas whitening component.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides a gaseous white subassembly that takes off of high temperature high humidity for it is white to make the high temperature high humidity gas in the adsorption tank take off, the white subassembly that takes off includes one-level cooling tank, second grade cooling tank, mechanical type defroster, intensification ware and blows cool drying blower in proper order, the export of blowing cool drying blower with the waste gas entry of adsorption tank is connected, the upper end of adsorption tank is equipped with waste gas and directly arranges mouth and waste gas back flow, the waste gas back flow is connected to the waste gas entry of one-level cooling tank.
The invention also provides a whitening method based on the whitening component, which is characterized by comprising the following steps:
a. a cooling and drying fan is used for providing power, so that vapor gas with the temperature higher than 100 ℃ in the adsorption tank is blown out and then enters a primary cooling box and a secondary cooling box for cooling, water drops are separated out after condensation, the water drops are removed through a mechanical demister, and the water drops are heated through a temperature rising device to rise the temperature and reduce the humidity;
b. the drying gas from the temperature rising device enters the adsorption tank through the blowing and cooling drying fan to carry out high-temperature moisture again, then enters the circulating cooling and whitening component, and the steps are repeated until the temperature of the carbon tank is reduced to be within 45 ℃;
c. and when the temperature of the carbon tank is reduced to be within 45 ℃, the carbon tank enters an adsorption state.
The invention also provides a device for recovering dimethyl amide and toluene, which comprises an air pipe for collecting buffer waste gas, a recovery tower for recovering DMF waste gas, an air cooler for cooling, a cooling water-cooling assembly, a toluene recovery tank, an adsorption tank, a primary fan for feeding the waste gas in the air pipe into the recovery tower, and a de-whitening assembly, wherein the de-whitening assembly sequentially comprises a primary cooling tank, a secondary cooling tank, a mechanical demister, a temperature rising device and a cooling and drying fan, an outlet of the cooling and drying fan is connected with a waste gas inlet of the adsorption tank, a waste gas straight discharge port and a waste gas return pipe are arranged at the upper end of the adsorption tank, and the waste gas return pipe is connected to the waste gas inlet of the primary cooling tank.
Preferably, the inlet of the primary fan is connected with the waste gas outlet of the air pipe, the waste gas outlet of the primary fan is respectively connected with the waste gas inlet of the recovery tower and the waste gas outlet of the air cooler, the waste gas outlet at the top of the recovery tower is connected with the waste gas inlet of the air cooler, and the waste gas outlet of the air cooler is connected with the waste gas inlet of the adsorption tank.
Preferably, the adsorption tank is also connected with a fire pipeline and/or a steam pipeline.
Preferably, a condensed water outlet at the bottom of the air cooler is connected with the lower end part of the recovery tower.
Preferably, a plurality of recovery layers are arranged on the recovery tower, and the connection position of a condensed water outlet at the bottom of the air cooler and the lower end part of the recovery tower is lower than the recovery layer positioned at the lowest part.
Preferably, the adsorption tank is a carbon tank.
Preferably, the mechanical demister is a baffle-type demister or a wire mesh-type demister.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention adds a circulating cooling and whitening component, utilizes a primary cooling tank (cooling water), a secondary cooling tank (freezing water) or cools water vapor, removes moisture in gas through a mechanical demister, is connected to an activated carbon adsorption tank after being heated and debugged, and circulates for many times to enable the gas to rapidly reach the emission temperature and humidity and eliminate the visual effect of white smoke generated when the gas is emitted.
Drawings
FIG. 1 is a schematic structural view of a toluene recovery apparatus according to the present invention.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiments in many different forms than those described herein and that modifications may be made by one skilled in the art without departing from the spirit and scope of the application and it is therefore not intended to be limited to the specific embodiments disclosed below.
In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature. It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
As shown in fig. 1, the high-temperature high-humidity gas whitening component comprises an air pipe 1 for collecting cache waste gas, a recovery tower 2 for recycling DMF waste gas, an air cooler 3 for cooling, a cooling water-cooling component 4, a toluene recovery tank 0, an adsorption tank 5, a first-level fan 9 for sending the waste gas in the air pipe 1 into the recovery tower 2, and a circulating cooling whitening component 6 connected to the adsorption tank 5. The adsorption tank 5 is also connected with a fire-fighting pipeline 7 and/or a steam pipeline 8.
The inlet of the primary fan 9 is connected with the waste gas outlet of the air pipe 1, the waste gas outlet of the primary fan is respectively connected with the waste gas inlet of the recovery tower 2 and the waste gas outlet of the air cooler 3, the waste gas outlet at the top of the recovery tower 2 is connected with the waste gas inlet of the air cooler 3, the waste gas outlet of the air cooler 3 is connected with the waste gas inlet of the adsorption tank 5,
the circulating cooling and whitening component 6 sequentially comprises a primary cooling box 61, a secondary cooling box 62, a mechanical demister 63, a temperature rising device 64 and a cooling and drying fan 65, an outlet of the cooling and drying fan 65 is connected with a waste gas inlet of the adsorption tank 5, a waste gas straight discharge port 51 and a waste gas return pipe 52 are arranged at the upper end of the adsorption tank 5, and the waste gas return pipe 52 is connected to the waste gas inlet of the primary cooling box 61.
The condensed water outlet at the bottom of the air cooler 3 is connected with the lower end part of the recovery tower 2. The recovery tower 2 is provided with a plurality of recovery layers 21, and the connection position of a condensed water outlet at the bottom of the air cooler 3 and the lower end part of the recovery tower 2 is lower than the lowest recovery layer 21.
The DMF and toluene recovery method based on the device comprises the following steps:
a. the primary fan sends the gas into the recovery tower from the wind pipe;
b. the gas after DMF recovery enters an air cooler;
c. the gas cooled by the air cooler directly enters the adsorption tank, the toluene is adsorbed, the recovery of DMF and toluene is completed, and the adsorption tank is in an adsorption state at the moment.
When the adsorption tank reaches saturation, need the desorption, let in high temperature steam (100 ℃ -130 ℃) through steam conduit 9 in 5 to the adsorption tank and desorb toluene and send into cooling water cooling component 4 in and carry out the condensation and retrieve, and high temperature steam is if the contaminated air in the direct discharge then vision sense organ in 5 adsorption tank this moment, consequently need to carry out the whitening to adsorption tank 5, and the whitening method is:
A. a cooling and drying fan is used for providing power to blow out high-temperature water vapor in the adsorption tank, the water vapor gas with the temperature higher than 100 ℃ enters a 61-stage cooling box (cooling water) and a 62-stage cooling box (chilled water) in sequence to be cooled to 30 ℃, water drops are separated out after condensation, the water drops are removed through a 63-stage mechanical demister (which can be in a baffle type or a wire mesh type or other forms), and the water drops are heated to 40 ℃ through a 64-temperature rising device to reduce the relative humidity of the adsorption tank from 100% to 60%;
B. the drying gas from the temperature rising device enters the adsorption tank through the blowing and cooling drying fan to carry out high-temperature moisture again, then enters the circulating cooling and whitening component, and the steps are repeated until the temperature of the carbon tank is reduced to be within 45 ℃;
C. when the carbon tank is cooled to be within 45 ℃, the whitening and drying are finished, and the adsorption tank is switched to an adsorption state.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (9)
1. A high temperature and high humidity gas whitening component for whitening high temperature and high humidity gas in an adsorption tank is characterized in that: the whiting component sequentially comprises a primary cooling box, a secondary cooling box, a mechanical demister, a temperature rising device and a cooling drying fan, wherein an outlet of the cooling drying fan is connected with a waste gas inlet of an adsorption tank, a waste gas straight discharge port and a waste gas return pipe are arranged at the upper end of the adsorption tank, and the waste gas return pipe is connected to the waste gas inlet of the primary cooling box.
2. A debanding method based on the debanding assembly of claim 1, comprising the steps of:
a. a cooling and drying fan is used for providing power, so that vapor gas with the temperature higher than 100 ℃ in the adsorption tank is blown out and then enters a primary cooling box and a secondary cooling box for cooling, water drops are separated out after condensation, the water drops are removed through a mechanical demister, and the water drops are heated through a temperature rising device to rise the temperature and reduce the humidity;
b. the drying gas from the temperature rising device enters the adsorption tank through the blowing and cooling drying fan to carry out high-temperature moisture again, then enters the circulating cooling and whitening component, and the steps are repeated until the temperature of the carbon tank is reduced to be within 45 ℃;
c. and when the temperature of the carbon tank is reduced to be within 45 ℃, the carbon tank enters an adsorption state.
3. The utility model provides a recovery unit of dimethyl amide and toluene, its is including the tuber pipe that is used for collecting buffer memory waste gas for DMF waste gas recovery's recovery tower is used for refrigerated air cooler, cooling water cooling module, toluene collection box, adsorption tank, and is used for sending the waste gas in the tuber pipe into the primary fan of recovery tower, its characterized in that: the recovery unit still includes and takes off white subassembly, it includes one-level cooler bin, second grade cooler bin, mechanical type defroster, intensification ware and blows cool drying blower in proper order to take off white subassembly, the export that blows cool drying blower with the waste gas entry of adsorption tank is connected, the upper end of adsorption tank is equipped with waste gas and directly arranges mouth and waste gas back flow, the waste gas back flow is connected to the waste gas entry of one-level cooler bin.
4. The apparatus for recovering dimethylamide and toluene according to claim 3, wherein: the inlet of the primary fan is connected with the waste gas outlet of the air pipe, the waste gas outlet of the primary fan is respectively connected with the waste gas inlet of the recovery tower and the waste gas outlet of the air cooler, the waste gas outlet at the top of the recovery tower is connected with the waste gas inlet of the air cooler, and the waste gas outlet of the air cooler is connected with the waste gas inlet of the adsorption tank.
5. The apparatus for recovering dimethylamide and toluene according to claim 3, wherein: the adsorption tank is also connected with a fire-fighting pipeline and/or a steam pipeline.
6. The apparatus for recovering dimethylamide and toluene according to claim 3, wherein: and a condensed water outlet at the bottom of the air cooler is connected with the lower end part of the recovery tower.
7. The apparatus for recovering dimethylamide and toluene according to claim 6, wherein: and a plurality of recovery layers are arranged on the recovery tower, and the connection position of a condensed water outlet at the bottom of the air cooler and the lower end part of the recovery tower is lower than the recovery layer positioned at the lowest part.
8. The apparatus for recovering dimethylamide and toluene according to claim 3, wherein: the adsorption tank is a carbon tank.
9. The apparatus for recovering dimethylamide and toluene according to claim 3, wherein: the mechanical demister is a baffle-type demister or a wire mesh-type demister.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010762153.5A CN112076584A (en) | 2020-07-31 | 2020-07-31 | High-temperature high-humidity gas whitening component and method and DMF (dimethyl formamide) and toluene recovery device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010762153.5A CN112076584A (en) | 2020-07-31 | 2020-07-31 | High-temperature high-humidity gas whitening component and method and DMF (dimethyl formamide) and toluene recovery device |
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| CN112076584A true CN112076584A (en) | 2020-12-15 |
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| CN202010762153.5A Pending CN112076584A (en) | 2020-07-31 | 2020-07-31 | High-temperature high-humidity gas whitening component and method and DMF (dimethyl formamide) and toluene recovery device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114307225A (en) * | 2021-12-30 | 2022-04-12 | 苏州赢众环保有限公司 | Steam condensation method |
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