CN211462615U - Methanol tail gas absorption treatment device - Google Patents
Methanol tail gas absorption treatment device Download PDFInfo
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- CN211462615U CN211462615U CN201922091029.6U CN201922091029U CN211462615U CN 211462615 U CN211462615 U CN 211462615U CN 201922091029 U CN201922091029 U CN 201922091029U CN 211462615 U CN211462615 U CN 211462615U
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Abstract
The utility model relates to a methyl alcohol tail gas absorbs processing apparatus, including workshop tail gas pipeline, total tail gas condenser, total tail gas buffer tank, second grade falling liquid film absorber, one-level absorption tower, second grade absorption tower and active carbon adsorption emptying devices. The utility model has the advantages that: the utility model discloses a methanol tail gas absorption treatment device, which comprises three systems of absorption, cooling and recovery, PBTC tail gas is respectively recovered by a main tail gas condenser to obtain a byproduct methanol; and part of methanol gas which is not condensed passes through the secondary falling film absorber, the primary absorption tower and the secondary absorption tower to be absorbed, the treated gas reaches the emission standard to be evacuated, the discharged wastewater directly enters the sewage station, and the waste activated carbon is treated as hazardous waste, so that the pollution to the environment can be reduced, and the purpose of recycling is achieved.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas treatment, in particular to methyl alcohol tail gas absorbs processing apparatus.
Background
A large amount of waste gas with peculiar smell is generated in the PBTC synthesis and hydrolysis process/carbazide synthesis, and general chemical engineering units directly discharge the waste gas to a cooling tower water pool, so that the environment is polluted, and the gas is not recycled.
Therefore, it is very necessary to develop a methanol tail gas absorption treatment device which can effectively reduce environmental pollution and recycle gas.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a methanol tail gas absorption processing apparatus that can effectively reduce environmental pollution and carry out recycle with gas.
In order to solve the technical problem, the utility model adopts the technical scheme that: the utility model provides a methanol tail gas absorbs processing apparatus which innovation point lies in: the system comprises a workshop tail gas pipeline, a total tail gas condenser, a total tail gas buffer tank, a secondary falling film absorber, a primary absorption tower, a secondary absorption tower and an active carbon adsorption emptying device;
the total tail gas condenser is communicated with a workshop tail gas pipeline, the total tail gas condenser is communicated with a total tail gas buffer tank through a methanol discharging pipeline, and the total tail gas buffer tank is also communicated with the workshop tail gas pipeline through a methanol feeding pipeline;
a gas inlet of the secondary falling film absorber is communicated with a methanol discharging pipeline through a gas feeding pipe A, a liquid outlet of the secondary falling film absorber is communicated with a liquid inlet through a circulating pipeline A, and the circulating pipeline A is also provided with a circulating pump A; the gas outlet of the secondary falling film absorber is communicated with the gas inlet of the primary falling film absorber through a gas feeding pipe B, the liquid outlet and the liquid inlet of the primary falling film absorber are communicated through a circulating pipeline B, and the circulating pipeline B is also provided with a circulating pump B;
the gas outlet of the primary falling film absorber is communicated with the gas inlet of the primary absorption tower through a gas feeding pipe C, the liquid outlet and the liquid inlet of the primary absorption tower are communicated through a circulating pipeline C, and the circulating pipeline C is also provided with a circulating pump C; the gas outlet of the first-stage absorption tower is communicated with the gas inlet of the second-stage absorption tower through a gas feeding pipe D, the liquid outlet and the liquid inlet of the second-stage absorption tower are communicated through a circulating pipeline D, a circulating pump D is further arranged on the circulating pipeline D, the gas inlet of the second-stage absorption tower is further communicated with the gas inlet of the active carbon adsorption emptying device through a gas feeding pipe E, and a draught fan is further arranged on the gas feeding pipe E in series;
wherein, the two-stage falling film absorber comprises a cylinder body, the cylinder body comprises a liquid distribution section, an absorption cooling section and a gas-liquid separation section which are sequentially connected by a flange plate from top to bottom, the liquid distribution section is provided with a liquid inlet, an absorption liquid inlet and a gas inlet, the upper part of the absorption cooling section is provided with a cooling water outlet, the lower part of the absorption cooling section is provided with a cooling water inlet, the upper part of the gas-liquid separation section is provided with a gas outlet, the lower part of the gas-liquid separation section is provided with a liquid outlet, the joint of the liquid distribution section and the absorption cooling section is provided with a first baffle plate, the joint of the absorption cooling section and the gas-liquid separation section is provided with a second baffle plate, the first baffle plate and the second baffle plate are both fixed on the inner wall of the cylinder body, a plurality of absorption tubes are arranged in the absorption cooling section, the absorption shell and tube is equipped with the liquid distribution pipe on the tubulation, and is located and is fixed with the liquid distribution board on the barrel inner wall between liquid distribution pipe and the absorption liquid entry, evenly be provided with V type through-hole on the liquid distribution board, the lower extreme and the liquid distribution pipe intercommunication setting that corresponds of this V type through-hole.
Further, the circulating pumps A are arranged in two and are arranged on the circulating pipeline A in parallel.
Further, the number of the circulating pumps B is two, and the circulating pumps B are arranged on the circulating pipeline B in parallel.
Further, the circulating pumps C are arranged in two and are arranged on the circulating pipeline C in parallel.
Further, the number of the circulating pumps D is two, and the circulating pumps D are arranged on the circulating pipeline D in parallel.
The utility model has the advantages that:
(1) the utility model discloses a methanol tail gas absorption treatment device, which comprises three systems of absorption, cooling and recovery, PBTC tail gas is respectively recovered by a main tail gas condenser to obtain a byproduct methanol; part of methanol gas which is not condensed is absorbed by a secondary falling film absorber, a primary absorption tower, a secondary absorption tower and an active carbon adsorption emptying device in sequence, the treated gas reaches the discharge standard and is emptied, the discharged wastewater directly enters a sewage station, and the waste active carbon is treated as hazardous waste, so that the pollution to the environment can be reduced, and the purpose of recycling is achieved;
(2) the utility model discloses methyl alcohol tail gas absorbs processing apparatus, wherein, second grade falling liquid film absorber passes through liquid distribution plate, and the liquid on the liquid distribution plate flows into V type through-hole to make the absorption liquid flow go into the absorption tubulation through dividing the liquid pipe, make the liquid velocity of flow stable, the distribution is even, and liquid becomes the membrane more complete even in absorbing the tubulation, has improved absorption efficiency, and then has improved methyl alcohol tail gas absorption processing apparatus's treatment effeciency greatly.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
Fig. 1 is a schematic structural diagram of the methanol tail gas absorption treatment device of the present invention.
Fig. 2 is a schematic diagram of a specific structure of the two-stage falling film absorber in fig. 1.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the scope of the present invention.
Examples
The methanol tail gas absorption treatment device of the embodiment, as shown in fig. 1, includes a workshop tail gas pipeline 1, a total tail gas condenser 2, a total tail gas buffer tank 3, a secondary falling film absorber 4, a primary falling film absorber 5, a primary absorption tower 6, a secondary absorption tower 7, and an activated carbon adsorption emptying device 8.
Total tail gas condenser 2 and 1 intercommunication settings of workshop tail gas pipeline, this total tail gas condenser 2 has total tail gas buffer tank 3 through methyl alcohol ejection of compact pipeline intercommunication, and total tail gas buffer tank 3 still through methyl alcohol charge-in pipeline and 1 intercommunication settings of workshop tail gas pipeline.
A gas inlet 41 of the secondary falling film absorber 4 is communicated with a methanol discharging pipeline through a gas feeding pipe A, a liquid outlet 42 of the secondary falling film absorber 4 is communicated with a liquid inlet 43 through a circulating pipeline A, and the circulating pipeline A is also provided with a circulating pump A9; in order to prevent the circulation pump A9 from being out of order during use, two circulation pumps A9 are arranged and are arranged on the circulation pipeline A in parallel.
The gas outlet 44 of the secondary falling film absorber 4 is communicated with the gas inlet of the primary falling film absorber 5 through a gas inlet pipe B, the liquid outlet and the liquid inlet of the primary falling film absorber 5 are communicated through a circulating pipeline B, and the circulating pipeline B is also provided with a circulating pump B10; in order to prevent the circulation pump B10 from malfunctioning during use, two circulation pumps B10 are provided and are arranged in parallel on the circulation pipe B.
The gas outlet of the primary falling film absorber 5 is communicated with the gas inlet of the primary absorption tower 6 through a gas feeding pipe C, the liquid outlet and the liquid inlet of the primary absorption tower 6 are communicated through a circulating pipeline C, and the circulating pipeline C is also provided with a circulating pump C11; in order to prevent the circulation pump C11 from malfunctioning during use, two circulation pumps C11 are provided and are arranged in parallel on the circulation pipe C.
The gas outlet of one-level absorption tower 6 still communicates the setting through the gas inlet of gas inlet pipe D with second grade absorption tower 7, set up through circulating line D intercommunication between the liquid outlet of second grade absorption tower 7 and the inlet, and still be provided with circulating pump D12 on the circulating line D, in order to prevent the use, circulating pump D12 breaks down, circulating pump D12 is provided with two, and parallelly connected the setting on circulating line D, the gas inlet of second grade absorption tower 7 still communicates the setting through gas inlet pipe E and the gas inlet of active carbon adsorption emptying devices 8, and still establish ties on the gas inlet pipe E and be provided with draught fan 13.
In the implementation process, in order to stabilize the flow rate and uniformly distribute the liquid in the secondary falling film absorber 4 and improve the absorption efficiency, the liquid distribution mechanism of the secondary falling film absorber 4 is improved, as shown in fig. 2, the secondary falling film absorber 4 comprises a cylinder 45, the cylinder comprises a liquid distribution section, an absorption cooling section and a gas-liquid separation section which are sequentially connected from top to bottom through flanges, the liquid distribution section is provided with a liquid inlet 43, an absorption liquid inlet 46 and a gas inlet 41, the upper part of the absorption cooling section is provided with a cooling water outlet 47, the lower part of the absorption cooling section is provided with a cooling water inlet 48, the upper part of the gas-liquid separation section is provided with a gas outlet 44, the lower part of the gas-liquid separation section is provided with a liquid outlet 42, the joint of the liquid distribution section and the absorption cooling section is provided with a first partition 491, the joint of the absorption cooling section and the gas-liquid separation section is provided with a second partition 492, a plurality of absorption tubes 493 are arranged in the absorption cooling section, two ends of each absorption tube 493 penetrate through a first partition 491 and a second partition 492, a liquid distribution pipe 494 is arranged on each absorption tube 493, a liquid distribution plate 495 is fixed on the inner wall of the cylinder body between the liquid distribution pipe 494 and an absorption liquid inlet 46, V-shaped through holes 4951 are uniformly arranged on the liquid distribution plate 495, the lower ends of the V-shaped through holes 4951 are communicated with the corresponding liquid distribution pipe 494, absorption liquid enters from the absorption liquid inlet 46 under the vacuum and negative pressure condition, gas enters from a gas inlet 41, the absorption liquid enters from the V-shaped through holes 4951 of the liquid distribution plate 495 and enters into the absorption tubes 494, a liquid film flows down in the absorption tubes 493, the absorption liquid and the gas are in full contact absorption in the absorption tubes 493 after absorption, the gas-liquid separation section is finished, a small amount of gas is discharged from a gas outlet 44 to enter into the next absorption device, and the absorption liquid is discharged from the liquid outlet 42, during absorption, cooling water enters through cooling water inlet 48 and exits through cooling water outlet 47, carrying away heat from the outer walls of absorption tubes 493.
In the methanol tail gas absorption treatment device, the PBTC tail gas is respectively subjected to recovery of byproduct methanol through the total tail gas condenser 2; and part of methanol gas which is not condensed is absorbed by the secondary falling film absorber 4, the primary falling film absorber 5, the primary absorption tower 6, the secondary absorption tower 7 and the active carbon adsorption emptying device 8 in sequence, the treated gas reaches the emission standard and is emptied, the discharged wastewater directly enters a sewage station, and the waste active carbon is treated as hazardous waste.
The basic principles and main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The utility model provides a methyl alcohol tail gas absorbs processing apparatus which characterized in that: the system comprises a workshop tail gas pipeline, a total tail gas condenser, a total tail gas buffer tank, a secondary falling film absorber, a primary absorption tower, a secondary absorption tower and an active carbon adsorption emptying device;
the total tail gas condenser is communicated with a workshop tail gas pipeline, the total tail gas condenser is communicated with a total tail gas buffer tank through a methanol discharging pipeline, and the total tail gas buffer tank is also communicated with the workshop tail gas pipeline through a methanol feeding pipeline;
a gas inlet of the secondary falling film absorber is communicated with a methanol discharging pipeline through a gas feeding pipe A, a liquid outlet of the secondary falling film absorber is communicated with a liquid inlet through a circulating pipeline A, and the circulating pipeline A is also provided with a circulating pump A; the gas outlet of the secondary falling film absorber is communicated with the gas inlet of the primary falling film absorber through a gas feeding pipe B, the liquid outlet and the liquid inlet of the primary falling film absorber are communicated through a circulating pipeline B, and the circulating pipeline B is also provided with a circulating pump B;
the gas outlet of the primary falling film absorber is communicated with the gas inlet of the primary absorption tower through a gas feeding pipe C, the liquid outlet and the liquid inlet of the primary absorption tower are communicated through a circulating pipeline C, and the circulating pipeline C is also provided with a circulating pump C; the gas outlet of the first-stage absorption tower is communicated with the gas inlet of the second-stage absorption tower through a gas feeding pipe D, the liquid outlet and the liquid inlet of the second-stage absorption tower are communicated through a circulating pipeline D, a circulating pump D is further arranged on the circulating pipeline D, the gas inlet of the second-stage absorption tower is further communicated with the gas inlet of the active carbon adsorption emptying device through a gas feeding pipe E, and a draught fan is further arranged on the gas feeding pipe E in series;
wherein, the two-stage falling film absorber comprises a cylinder body, the cylinder body comprises a liquid distribution section, an absorption cooling section and a gas-liquid separation section which are sequentially connected by a flange plate from top to bottom, the liquid distribution section is provided with a liquid inlet, an absorption liquid inlet and a gas inlet, the upper part of the absorption cooling section is provided with a cooling water outlet, the lower part of the absorption cooling section is provided with a cooling water inlet, the upper part of the gas-liquid separation section is provided with a gas outlet, the lower part of the gas-liquid separation section is provided with a liquid outlet, the joint of the liquid distribution section and the absorption cooling section is provided with a first baffle plate, the joint of the absorption cooling section and the gas-liquid separation section is provided with a second baffle plate, the first baffle plate and the second baffle plate are both fixed on the inner wall of the cylinder body, a plurality of absorption tubes are arranged in the absorption cooling section, the absorption shell and tube is equipped with the liquid distribution pipe on the tubulation, and is located and is fixed with the liquid distribution board on the barrel inner wall between liquid distribution pipe and the absorption liquid entry, evenly be provided with V type through-hole on the liquid distribution board, the lower extreme and the liquid distribution pipe intercommunication setting that corresponds of this V type through-hole.
2. The methanol off-gas absorption treatment device according to claim 1, characterized in that: and two circulating pumps A are arranged and are arranged on the circulating pipeline A in parallel.
3. The methanol off-gas absorption treatment device according to claim 1, characterized in that: and two circulating pumps B are arranged and are arranged on the circulating pipeline B in parallel.
4. The methanol off-gas absorption treatment device according to claim 1, characterized in that: and two circulating pumps C are arranged and are arranged on the circulating pipeline C in parallel.
5. The methanol off-gas absorption treatment device according to claim 1, characterized in that: and two circulating pumps D are arranged and are arranged on the circulating pipeline D in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922091029.6U CN211462615U (en) | 2019-11-28 | 2019-11-28 | Methanol tail gas absorption treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922091029.6U CN211462615U (en) | 2019-11-28 | 2019-11-28 | Methanol tail gas absorption treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211462615U true CN211462615U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922091029.6U Active CN211462615U (en) | 2019-11-28 | 2019-11-28 | Methanol tail gas absorption treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211462615U (en) |
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2019
- 2019-11-28 CN CN201922091029.6U patent/CN211462615U/en active Active
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