CN210814585U - Methanol-containing tail gas washing device - Google Patents
Methanol-containing tail gas washing device Download PDFInfo
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- CN210814585U CN210814585U CN201921548767.2U CN201921548767U CN210814585U CN 210814585 U CN210814585 U CN 210814585U CN 201921548767 U CN201921548767 U CN 201921548767U CN 210814585 U CN210814585 U CN 210814585U
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Abstract
The utility model relates to a coal chemical industry technical field discloses a tail gas washing device who contains methyl alcohol, including liquid seal tank (12) and scrubbing tower (14), liquid seal tank (12) have can hold liquid seal cavity (120) of the liquid seal liquid that dissolves methyl alcohol, liquid seal cavity (120) have respectively supply tail gas import and the tail gas export that contains methyl alcohol entering and discharge, be provided with on the jar body of liquid seal tank (12) can to the liquid feed mouth that constantly leads to liquid seal liquid in liquid seal cavity (120); the device is characterized in that a washing gas inlet communicated with the tail gas outlet is formed in the tower body of the washing tower (14), a washing gas outlet for discharging washed tail gas is further formed in the tower body of the washing tower (14), and the washing tower (14) is arranged to be capable of washing the tail gas entering the washing tower (14) so as to remove methanol in the tail gas. The methanol-containing tail gas washing device can greatly reduce the methanol content in the washed tail gas.
Description
Technical Field
The utility model relates to a coal chemical industry technical field specifically relates to a tail gas washing device who contains methyl alcohol.
Background
The low-temperature methanol washing is to remove acid gas in raw material gas such as tail gas of coal chemical industry by taking cold methanol as an absorption solvent and utilizing the excellent characteristic that the methanol has extremely high solubility to the acid gas at low temperature. The low-temperature methanol washing process has high purification degree of raw material gas, can selectively absorb components in the raw material gas, and has the advantages of energy consumption saving and the like, thereby having wide application in tail gas purification such as coal chemical tail gas purification. Since the tail gas contains methanol after the low-temperature methanol washing, the tail gas can be discharged after the methanol in the tail gas is washed by using the tail gas washing tower. Currently, although the tail gas is washed, the methanol in the tail gas discharged into the atmosphere still exceeds the standard.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the problem that the tail gas after the low temperature methanol washing that prior art exists still contains more methyl alcohol after the washing, providing a tail gas washing device who contains methyl alcohol, this tail gas washing device who contains methyl alcohol can the significantly reduced methanol content in the tail gas after the washing.
In order to achieve the above object, an aspect of the present invention provides a methanol-containing tail gas washing device, which includes:
the liquid seal tank is provided with a liquid seal cavity capable of containing liquid seal liquid for dissolving methanol, the liquid seal cavity is provided with a tail gas inlet and a tail gas outlet for respectively allowing tail gas containing methanol to enter and discharge, and a tank body of the liquid seal tank is provided with a liquid supplementing port capable of continuously introducing the liquid seal liquid into the liquid seal cavity; and
the washing tower is characterized in that a washing gas inlet communicated with the tail gas outlet is formed in the tower body of the washing tower, a washing gas outlet for discharging washed tail gas is further formed in the tower body of the washing tower, and the washing tower is arranged to be capable of washing the tail gas entering the washing tower so as to remove methanol in the tail gas.
In the technical scheme, the liquid supplementing port capable of continuously introducing the liquid seal liquid into the liquid seal cavity is formed in the liquid seal tank, so that the volume concentration of the methanol in the liquid seal cavity is kept within a certain range, such as not more than 0.2%, the methanol in the liquid seal liquid in the liquid seal cavity is not easy to volatilize, the probability that the volatilized methanol enters the washing tower when tail gas containing the methanol passes through the liquid seal liquid is reduced, the washing effect and the washing efficiency of the washing tower are improved, and the content of the methanol in the tail gas discharged from the washing gas outlet is greatly reduced.
Preferably, the liquid supplementing port is arranged at the bottom of the tank body of the liquid seal tank.
Preferably, a washing liquid inlet for a washing liquid for washing methanol-containing tail gas to enter is arranged on the tower body of the washing tower;
the tail gas washing device who contains methyl alcohol is including leading-in with the washing liquid feed liquor pipe subassembly in the scrubbing tower, feed liquor pipe subassembly including connect in the feed liquor pipe and the setting of washing liquid import are in valve group on the feed liquor pipe, the valve group sets up to be able to control the circulation state of the intraductal liquid of feed liquor.
Preferably, the valve block comprises a plurality of liquid inlet control valves arranged in series on the liquid inlet pipe.
Preferably, the methanol-containing tail gas washing device comprises a liquid supplementing pipe assembly, the liquid supplementing pipe assembly comprises a liquid supplementing pipe and a liquid supplementing control valve, the two ends of the liquid supplementing pipe are respectively connected to the liquid inlet pipe and the liquid supplementing port, the liquid supplementing control valve is arranged on the liquid supplementing pipe, and the liquid supplementing control valve is arranged to be capable of controlling the flowing state of liquid in the liquid supplementing pipe.
Preferably, the port of the liquid replenishing pipe connected to the liquid inlet pipe is arranged between two adjacent liquid inlet control valves.
Preferably, a tank body of the liquid seal tank is provided with a liquid seal liquid inlet;
the methanol-containing tail gas washing device comprises a liquid guide pipe assembly capable of guiding liquid sealing liquid into the liquid sealing tank, wherein the liquid guide pipe assembly comprises a liquid guide pipe and a liquid sealing liquid control valve, the two ends of the liquid guide pipe are respectively connected with the liquid inlet pipe and the liquid sealing liquid inlet, the liquid sealing liquid control valve is arranged on the liquid guide pipe, and the liquid sealing liquid control valve is arranged to be capable of controlling the circulation state of the liquid in the liquid guide pipe.
Preferably, a washing liquid outlet for discharging washing liquid after washing tail gas is arranged on the tower body of the washing tower;
the methanol-containing tail gas washing device comprises a rectification unit, the rectification unit comprises a rectification tower, the rectification tower is provided with a rectification liquid inlet for a rectification liquid to enter, the rectification liquid inlet is communicated with a washing liquid outlet, and the rectification tower is arranged to be capable of rectifying washing liquid after washing tail gas.
Preferably, the methanol-containing tail gas washing device comprises a heat exchanger, wherein the heat exchanger is arranged to receive the washed washing liquid discharged from the washing liquid outlet, heat the washed washing liquid and discharge the heated washing liquid into the rectification liquid inlet.
Preferably, the heat exchanger is provided with a heating liquid inlet and a heating liquid outlet for respectively allowing a heating medium to enter and discharge, and one end of the liquid inlet pipe, which is far away from the washing liquid inlet, is communicated with the heating liquid outlet.
Drawings
Fig. 1 is a schematic diagram of the overall structure of a methanol-containing tail gas scrubbing device according to a preferred embodiment of the present invention.
Description of the reference numerals
10-a methanol-containing tail gas washing device; 12-liquid sealing the tank; 120-liquid seal chamber; 14-a washing column; 160-a liquid inlet pipe; 162-a liquid inlet control valve; 17-a tail gas discharge cylinder; 180-a liquid supplementing pipe; 182-a fluid infusion control valve; 190-a catheter; 192-liquid seal liquid control valve; 20-a rectification unit; 200-a rectifying tower; 21-a reboiler; 22-a heat exchanger; 24-a first delivery pump; 26-second delivery pump.
Detailed Description
In the present invention, the use of directional terms such as "upper, lower, left and right" in the absence of a contrary explanation generally means that the terms "inside and outside" refer to the inside and outside of the outline of the component in consideration of the orientation of the drawings and the practical application.
The utility model provides a tail gas washing device who contains methyl alcohol, tail gas washing device 10 who contains methyl alcohol include liquid seal tank 12 and scrubbing tower 14. Wherein: the liquid seal tank 12 is provided with a liquid seal chamber 120 capable of containing liquid seal liquid such as water for dissolving methanol, the liquid seal chamber 120 is provided with a tail gas inlet and a tail gas outlet for respectively allowing tail gas containing methanol to enter and discharge, after the tail gas containing methanol enters the liquid seal chamber 120 from the tail gas inlet, methanol contained in the tail gas can be dissolved in the liquid seal liquid such as water, the tail gas containing methanol is discharged from the tail gas outlet after passing through the liquid seal liquid, a liquid replenishing port capable of continuously introducing the liquid seal liquid into the liquid seal chamber 120 is arranged on a tank body of the liquid seal tank 12, namely the liquid seal liquid is replenished into the liquid seal tank 12 through the liquid replenishing port, so that the volume concentration of the methanol in the liquid seal chamber 120 can be ensured to be kept within a certain range such as not more than 0.2%, the methanol in the liquid seal liquid is not easy to volatilize, and the probability that the methanol volatilized when the tail gas containing methanol passes through the liquid seal liquid and enters the washing tower 14 is reduced, it should be noted that after the tail gas containing methanol passes through the liquid seal liquid in the liquid seal chamber 120, a part of the liquid seal liquid can be taken away, so that the liquid level of the liquid seal liquid in the liquid seal chamber 120 is ensured when the liquid seal liquid is continuously introduced into the liquid seal chamber 120 from the liquid replenishing port; the washing tower 14 is provided with a washing gas inlet communicated with the tail gas outlet, the washing tower 14 is further provided with a washing gas outlet for discharging the washed tail gas, the washing tower 14 is configured to wash the tail gas entering the washing tower 14 to remove methanol in the tail gas, the tail gas passing through the liquid seal tank 12 enters the washing tower 14 through the washing gas inlet and is discharged through the washing gas outlet after being washed by a washing liquid, such as water, in a countercurrent manner, the washing gas inlet can be arranged on the side wall of the tower body, and the washing gas outlet can be arranged on the top wall of the tower body. The liquid supplementing port capable of continuously communicating the liquid seal liquid into the liquid seal chamber 120 is formed in the liquid seal tank 12, so that the volume concentration of methanol in the liquid seal chamber 120 is kept within a certain range, for example, is not more than 0.2%, methanol in the liquid seal liquid in the liquid seal chamber 120 is not easy to volatilize, the probability that methanol-containing tail gas enters the washing tower 14 when being carried and volatilized when passing through the liquid seal liquid is reduced, the washing effect and the washing efficiency of the washing tower 14 are improved, the methanol content in the tail gas discharged from the washing gas outlet is greatly reduced, and the methanol content in the tail gas can be lower than 115ppm, for example. In addition, it should be noted that the tail gas containing methanol may refer to the coal chemical industry acidic tail gas after low-temperature methanol washing.
In order to replenish the liquid seal chamber 120 with the liquid seal liquid, the liquid replenishing port may be disposed at the bottom of the tank body of the liquid seal tank 12, so that the liquid seal liquid can enter the liquid seal tank 12 from the bottom of the liquid seal pipe 12.
It should be noted that, a washing liquid inlet for entering a washing liquid, such as water, for washing the methanol-containing tail gas may be arranged on the tower body of the washing tower 14, the washing liquid inlet may be arranged on the side wall of the washing tower 14, and the washing liquid inlet may be higher than the washing gas inlet; the methanol-containing off-gas scrubbing apparatus 10 may include a liquid inlet pipe assembly capable of introducing a scrubbing solution into the scrubbing tower 14, as shown in fig. 1, the liquid inlet pipe assembly may include a liquid inlet pipe 160 connected to the scrubbing solution inlet and a valve block disposed on the liquid inlet pipe 160, the valve block being configured to control a flow state of a liquid, i.e., a scrubbing solution, in the liquid inlet pipe 160. The structure of the liquid inlet pipe 160 is not particularly limited as long as the washing liquid can be introduced into the washing tower 14.
As shown in fig. 1, the valve set may include a plurality of liquid inlet control valves 162 serially connected to the liquid inlet pipe 160, and by providing the plurality of liquid inlet control valves 162, the liquid in the liquid inlet pipe 160 may be better controlled to allow stable delivery of the washing liquid.
It is understood that a fluid replacement pipe assembly may be provided to supply a fluid such as water into the fluid sealed tank 12, the fluid replacement pipe assembly may include a fluid replacement pipe 180 having both ends connected to the fluid inlet pipe 160 and the fluid replacement port, respectively, and a fluid replacement control valve 182 provided on the fluid replacement pipe 180, and the fluid replacement control valve 182 may be provided to control a flow state of the fluid in the fluid replacement pipe 180. It should be noted that the washing liquid in the liquid inlet pipe 160 may be introduced into the liquid seal tank 12 as a liquid seal liquid.
In order to further stabilize the introduction of the liquid in the liquid inlet pipe 160 and to facilitate the control of the flow state of the liquid in the liquid supplement pipe 180, the port of the liquid supplement pipe 180 connected to the liquid inlet pipe 160 is disposed between the adjacent two liquid inlet control valves 162.
In addition, a liquid seal liquid inlet can be formed on the tank body of the liquid seal tank 12; a conduit assembly capable of directing the liquid seal liquid into the liquid seal tank 12 may be provided to establish the liquid level in the liquid seal tank 12. The catheter assembly may include a catheter 190 having two ends respectively connected to the inlet tube 160 and the inlet of the liquid sealing solution, and a liquid sealing solution control valve 192 disposed on the catheter 190, and the liquid sealing solution control valve 192 may be configured to control a flow state of the liquid in the catheter 190.
It should be noted that a washing liquid outlet for discharging the washing liquid after washing the tail gas may be disposed on the tower body of the washing tower 14, wherein the washing liquid outlet may be disposed at the bottom of the washing tower 14.
In addition, a rectifying unit 20 capable of separating the solute such as methanol and the solvent such as water phase in the scrubbing liquid may be provided, so that the scrubbing liquid after scrubbing the off-gas can be recovered and the separated solvent such as water can be continuously introduced as the scrubbing liquid into the scrubbing tower 14 to scrub the off-gas containing methanol, thereby saving energy greatly.
As shown in fig. 1, the rectification unit 20 may include a rectification column 200, the rectification column 200 having a rectification liquid inlet into which a liquid to be rectified enters, the rectification liquid inlet communicating with the washing liquid outlet, the rectification liquid inlet into which the washing liquid discharged from the washing liquid outlet enters, the rectification column 200 being configured to rectify the washing liquid after washing the off-gas. It should be noted that the rectifying tower 200 has a rectifying vapor outlet through which vapor of the solute obtained by rectification, such as methanol vapor, is discharged, and a rectifying liquid discharge outlet through which liquid of the solute obtained by rectification, such as water, is discharged. Alternatively, it may be in rectifying column 200The reboiler 21 is provided at the bottom to supply energy to the rectifying column 200 so that the rectifying column 200 performs rectifying operation. It is to be noted that 13 ten thousand Nm of methanol can be cumulatively recovered in 3 months3。
Additionally, a heat exchanger 22 may be provided, and the heat exchanger 22 may be configured to receive the washed scrubbing liquid discharged from the scrubbing liquid outlet and heat the washed scrubbing liquid, and discharge the heated scrubbing liquid into the rectification liquid inlet, it being understood that the scrubbing liquid outlet may be in communication with the rectification liquid inlet through the heat exchanger 22, and the scrubbing liquid discharged from the scrubbing liquid outlet first enters the heat exchanger 22 to be heated and then enters the rectification column 200 for rectification. In order to efficiently discharge the washing liquid after washing the off-gas into the heat exchanger 22, a first transfer pump 24 may be provided to pump the washing liquid after washing the off-gas into the heat exchanger 22.
It should be noted that the heat exchanger 22 has a heating liquid inlet and a heating liquid outlet for respectively allowing the heating medium to enter and discharge, in order to save energy, the rectification liquid such as water discharged from the rectification liquid outlet of the rectification tower 200 may be discharged into the heating liquid inlet as the heating medium to heat the washing liquid after washing the tail gas, and one end of the liquid inlet pipe 160 away from the washing liquid inlet may be communicated with the heating liquid outlet, that is, the heating medium for heating the washing liquid after washing the tail gas may be poured into the liquid inlet pipe 160 as the washing liquid of the washing liquid tail gas. In addition, in order to efficiently discharge the rectification liquid into the heating liquid inlet, a second transfer pump 26 may be provided to pump the rectification liquid into the heating liquid inlet of the heat exchanger 22.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. The technical idea of the utility model within the scope, can be right the utility model discloses a technical scheme carries out multiple simple variant, makes up with any suitable mode including each concrete technical feature. In order to avoid unnecessary repetition, the present invention does not separately describe various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.
Claims (10)
1. A methanol-containing off-gas scrubbing apparatus, characterized in that the methanol-containing off-gas scrubbing apparatus (10) comprises:
the device comprises a liquid seal tank (12), wherein the liquid seal tank (12) is provided with a liquid seal cavity (120) capable of containing liquid seal liquid for dissolving methanol, the liquid seal cavity (120) is provided with a tail gas inlet and a tail gas outlet for respectively allowing tail gas containing methanol to enter and discharge, and a tank body of the liquid seal tank (12) is provided with a liquid supplementing port capable of continuously introducing the liquid seal liquid into the liquid seal cavity (120); and
the washing tower comprises a washing tower (14), wherein a washing gas inlet communicated with a tail gas outlet is formed in the tower body of the washing tower (14), a washing gas outlet for discharging washed tail gas is further formed in the tower body of the washing tower (14), and the washing tower (14) is arranged to be capable of washing the tail gas entering the washing tower (14) so as to remove methanol in the tail gas.
2. The methanol-containing tail gas washing device according to claim 1, wherein the liquid supplementing port is arranged at the bottom of the tank body of the liquid seal tank (12).
3. The methanol-containing tail gas washing device according to claim 1, wherein a washing liquid inlet for a washing liquid for washing the methanol-containing tail gas is arranged on the tower body of the washing tower (14);
tail gas washing device (10) including methyl alcohol can be with the washing liquid leading-in the feed liquor pipe subassembly in scrubbing tower (14), the feed liquor pipe subassembly is including connecting in feed liquor pipe (160) and the setting of washing liquid import are in valve group on feed liquor pipe (160), the valve group sets up to be able to control the circulation state of the liquid in feed liquor pipe (160).
4. The methanol-containing off-gas scrubbing apparatus of claim 3, wherein said valve block comprises a plurality of inlet control valves (162) disposed in series on said inlet pipe (160).
5. The methanol-containing tail gas scrubbing device according to claim 4, wherein the methanol-containing tail gas scrubbing device (10) comprises a liquid supplementing pipe assembly, the liquid supplementing pipe assembly comprises a liquid supplementing pipe (180) with two ends respectively connected to the liquid inlet pipe (160) and the liquid supplementing port, and a liquid supplementing control valve (182) arranged on the liquid supplementing pipe (180), and the liquid supplementing control valve (182) is arranged to control the flowing state of liquid in the liquid supplementing pipe (180).
6. The methanol-containing off-gas scrubbing apparatus according to claim 5, wherein the port of the liquid replenishing pipe (180) connected to the liquid inlet pipe (160) is disposed between two adjacent liquid inlet control valves (162).
7. The methanol-containing tail gas washing device according to claim 3, wherein a liquid seal liquid inlet is formed on the tank body of the liquid seal tank (12);
the methanol-containing tail gas washing device (10) comprises a liquid guide pipe assembly capable of guiding liquid sealing liquid into the liquid sealing tank (12), wherein the liquid guide pipe assembly comprises a liquid guide pipe (190) and a liquid sealing liquid control valve (192), the two ends of the liquid guide pipe are respectively connected to the liquid inlet pipe (160) and a liquid sealing liquid inlet, the liquid sealing liquid control valve (192) is arranged on the liquid guide pipe (190), and the liquid sealing liquid control valve (192) is arranged to be capable of controlling the circulation state of liquid in the liquid guide pipe (190).
8. The methanol-containing tail gas washing device according to any one of claims 3 to 7, wherein a washing liquid outlet for discharging a washing liquid after washing the tail gas is arranged on the tower body of the washing tower (14);
the tail gas washing device (10) containing the methanol comprises a rectifying unit (20), the rectifying unit (20) comprises a rectifying tower (200), the rectifying tower (200) is provided with a rectifying liquid inlet for allowing a rectifying liquid to enter, the rectifying liquid inlet is communicated with a washing liquid outlet, and the rectifying tower (200) is set to be capable of rectifying and washing liquid after tail gas.
9. A methanol-containing off-gas scrubbing apparatus according to claim 8, wherein said methanol-containing off-gas scrubbing apparatus (10) comprises a heat exchanger (22), said heat exchanger (22) being configured to receive scrubbed scrubbing liquid exiting from said scrubbing liquid outlet and to heat the scrubbed scrubbing liquid and to discharge the heated scrubbing liquid into said rectification liquid inlet.
10. The methanol-containing tail gas washing device according to claim 9, wherein the heat exchanger (22) has a heating liquid inlet and a heating liquid outlet for respectively feeding and discharging a heating medium, and an end of the liquid inlet pipe (160) away from the washing liquid inlet communicates with the heating liquid outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921548767.2U CN210814585U (en) | 2019-09-17 | 2019-09-17 | Methanol-containing tail gas washing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921548767.2U CN210814585U (en) | 2019-09-17 | 2019-09-17 | Methanol-containing tail gas washing device |
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| Publication Number | Publication Date |
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| CN210814585U true CN210814585U (en) | 2020-06-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921548767.2U Active CN210814585U (en) | 2019-09-17 | 2019-09-17 | Methanol-containing tail gas washing device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250103A (en) * | 2020-10-19 | 2021-01-22 | 攀钢集团钒钛资源股份有限公司 | Titanium tetrachloride preparation system and tail gas treatment thereof |
-
2019
- 2019-09-17 CN CN201921548767.2U patent/CN210814585U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112250103A (en) * | 2020-10-19 | 2021-01-22 | 攀钢集团钒钛资源股份有限公司 | Titanium tetrachloride preparation system and tail gas treatment thereof |
| CN112250103B (en) * | 2020-10-19 | 2022-07-08 | 攀钢集团钒钛资源股份有限公司 | Titanium tetrachloride preparation system and tail gas treatment thereof |
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Address after: Block C, Shenhua building, 16 ande Road, Dongcheng District, Beijing, 100011 Patentee after: CHINA SHENHUA COAL TO LIQUID AND CHEMICAL Co.,Ltd. Patentee after: Guoneng Xinjiang Chemical Co.,Ltd. Address before: Block C, Shenhua building, 16 ande Road, Dongcheng District, Beijing, 100011 Patentee before: CHINA SHENHUA COAL TO LIQUID AND CHEMICAL Co.,Ltd. Patentee before: SHENHUA XINJIANG CHEMICAL Co.,Ltd. |