CN214552381U - Recovery unit of methanol tank district tank deck exhaust gas - Google Patents

Abstract

The utility model discloses a recovery device of the tank top exhaust gas of a methanol tank field, which comprises a water-sealed tank, the water-sealed tank is provided with an air inlet pipe, an exhaust pipe I, a liquid outlet pipe and an overflow pipe which are respectively communicated with the water-sealed tank, the air inlet pipe penetrates from the top of the water-sealed tank and extends to the position below the liquid level of the water-sealed tank, the liquid outlet pipe is positioned at the bottom of the water-sealed tank, the liquid outlet pipe is communicated with the underground main tank pipe, the overflow pipe is arranged below the liquid level defined by the water seal tank and is communicated with the underground main tank pipe, a part of gas phase escaping from the top of the methanol storage tank is introduced into the water seal tank for water washing, the methanol in the exhaust gas is absorbed by water by utilizing the principle that the methanol and the water can be mutually dissolved without proportion, the absorbed gas is discharged in a qualified mode, and the absorbed methanol water solution is recycled, so that the purposes of energy conservation and emission reduction are achieved.

Description

Recovery unit of methanol tank district tank deck exhaust gas

Technical Field

The utility model relates to a recovery field of methyl alcohol tank field tank deck vent gas specifically is a recovery unit of methyl alcohol tank field tank deck vent gas.

Background

The methanol production device is usually matched with a methanol synthesis device, a methanol rectification device and a methanol intermediate tank area, the vapor pressure of liquid methanol stored in a methanol storage tank at normal temperature (25-47 ℃) is 12.97kpa, the design pressure of a breather valve at the tank top of part of the storage tank is-0.3 kpa-1.8 kpa, so that part of gas phase escapes from the tank top of the storage tank at normal temperature, when the temperature rises, under the feeding working condition and the like, and the escaped gas phase not only causes methanol waste, but also causes pollution to the environment to a certain degree. With the increasing strong demands of pollutant discharge or emission organized recovery and the like, the gas-phase methanol needs to be recovered, the breathing valve of the methanol storage tank in the prior art directly discharges gas into the atmosphere, non-methane is always discharged in an unorganized mode, the environment is polluted, and no methanol recovery facility is provided, so that the methanol gas is wasted.

Disclosure of Invention

An object of the utility model is to provide a recovery unit of methyl alcohol tank field tank deck discharge, a serial communication port, including the water sealed tank, be equipped with intake pipe, blast pipe, drain pipe, the overflow pipe that is linked together with the water sealed tank respectively on the water sealed tank, the intake pipe penetrates and extends to the below of the liquid level of water sealed tank by the top of water sealed tank, the drain pipe is located the bottom of water sealed tank, the drain pipe is linked together with underground groove house steward, the overflow pipe is located the below of the liquid level that the water sealed tank injectd, the overflow pipe is linked together with underground groove house steward.

Preferably, the overflow pipe is provided with a second exhaust pipe communicated with the overflow pipe.

Preferably, a water inlet pipe is arranged on the water seal tank, a liquid inlet valve is arranged on the water inlet pipe, a liquid outlet valve is arranged on the liquid outlet pipe, an overflow valve is arranged on the overflow pipe, and an exhaust valve is arranged on the exhaust pipe II.

Preferably, an elbow pipeline is connected between the overflow pipe and the second exhaust pipe.

Preferably, a sight glass port is formed in the liquid level height limited in the water seal tank, and transparent explosion-proof glass is hermetically arranged in the sight glass port.

Preferably, the number of the intake pipes is at least one.

Preferably, the water inlet pipe is positioned above the liquid outlet pipe.

Preferably, the liquid outlet pipe and the overflow pipe are communicated with the underground tank main pipe through a three-way pipeline.

Compared with the prior art, the beneficial effects of the utility model are that:

1. a part of gas phase escaping from the top of the methanol storage tank is introduced into the water seal tank for water washing, the methanol in the exhaust gas is absorbed by water by utilizing the principle that the methanol and the water can be mutually dissolved without proportion, the absorbed gas is discharged in a qualified mode, and the absorbed methanol aqueous solution is sent back to the rectification system for refining, so that the purposes of energy conservation and emission reduction are achieved.

2. The connecting elbow pipe is arranged between the overflow pipe and the second exhaust pipe, and the second exhaust pipe is provided with the exhaust valve which is arranged in the water distribution pipeline and used for largely discharging air aggregated in the pipe or discharging trace air aggregated at the higher part of the pipe into the atmosphere so as to improve the pipeline and the exhaust pipeWater pumpThe use efficiency is high, and once negative pressure is generated in the pipe, the valve can rapidly suck the outside air so as to protect the damage of the pipe line caused by the negative pressure.

3. The water seal tank exhausts and easily takes liquid, easily causes the water seal tank liquid level unstability, leads to the storage tank pressure unstability, needs to last the moisturizing, guarantees liquid level balance, has seted up the sight glass mouth through the liquid level height department of injecing inside the water seal tank, the sealed installation has transparent explosion-proof glass in the sight glass mouth, is favorable to monitoring the inside liquid level height of water seal tank.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a recovery device for the top vent gas of a methanol tank field;

description of reference numerals:

1-water-sealed tank, 2-air inlet pipe, 3-first exhaust pipe, 4-water inlet pipe, 5-sight glass port, 6-liquid outlet pipe, 7-overflow pipe, 8-underground tank main pipe, 9-second exhaust pipe, 10-liquid inlet valve, 11-liquid outlet valve, 12-overflow valve, 13-exhaust valve and 14-transparent explosion-proof glass.

Detailed Description

In the following, the technical solutions in the embodiments of the present invention are clearly and completely described with reference to the drawings in the embodiments of the present invention, but it should be understood that the scope of the present invention is not limited by the specific embodiments.

Example (b):

as shown in figure 1, the recovery device of the tank top exhaust gas in the methanol tank area is characterized by comprising a water-sealed tank 1, wherein the water-sealed tank 1 is provided with an air inlet pipe 2, an exhaust pipe 3, a liquid outlet pipe 6 and an overflow pipe 7 which are respectively communicated with the water-sealed tank 1, the air inlet pipe 2 penetrates from the top of the water-sealed tank 1 and extends to the position below the liquid level of the water-sealed tank 1, the liquid outlet pipe 6 is positioned at the bottom of the water-sealed tank 1, the liquid outlet pipe 6 is communicated with an underground main pipe 8, the overflow pipe 7 is arranged below the liquid level defined by the water-sealed tank 1, the overflow pipe 7 is communicated with the underground main pipe 8, the vapor pressure of liquid methanol stored in the methanol storage tank at normal temperature (25-47 ℃) is 12.97kpa, the design pressure of a tank top breather valve of part of the storage tank is-0.3 kpa-1.8 kpa, so that a part of the vapor phase on the top of the storage tank escapes under the conditions of normal temperature, rising, feeding tank top and the like, set for 1.5KPa with water seal tank pressure, cause partial escaping gas to wash in water seal tank 1 through intake pipe 2, liquid flows into underground groove house steward 8 from drain pipe 6 and gets into the underground groove and recycle after washing, gas after 1 washing absorption of water seal tank passes through 3 qualified discharges of blast pipe, set up overflow pipe 7 on water seal tank 1 in order to flow into underground groove house steward 8 from overflow pipe 7 with the liquid that exceeds the liquid level height that water seal tank 1 prescribed a limit, prevent to lead to the storage tank pressure height because of 1 liquid level of water seal tank too high.

And a second exhaust pipe 9 communicated with the overflow pipe 7 is arranged on the overflow pipe 7, so that redundant gas in the pipeline is removed, the service efficiency of the pipeline is improved, and the energy consumption is reduced.

The water-sealed tank 1 is provided with a water inlet pipe 4, the water inlet pipe 4 is provided with a liquid inlet valve 10, the liquid outlet pipe 6 is provided with a liquid outlet valve 11, the overflow pipe 7 is provided with an overflow valve 12, the exhaust pipe two 9 is provided with an exhaust valve 13, and the on-off of each pipeline is controlled by arranging valves on each pipeline.

An elbow pipeline is connected between the overflow pipe 7 and the second exhaust pipe 9, and when the exhaust valve 13 on the second exhaust pipe 9 is used, the exhaust valve is installed at a height-control point or an elbow and the like, so that redundant gas in the pipeline is discharged, the use efficiency of a pipeline is improved, and the energy consumption is reduced.

The liquid level height department that water seal tank 1 is inside injectd has seted up and has looked mirror mouth 5, look mirror mouth 5 internal seal and install transparent explosion-proof glass 14, be favorable to monitoring the liquid level height of water seal tank inside at any time.

The number of intake pipe 2 is one at least, sets up a plurality of intake pipes 2 in the top of water sealed tank 1 and makes this recovery unit of methyl alcohol tank field tank deck exhaust gas's work efficiency higher.

The water inlet pipe 4 is positioned above the liquid outlet pipe 6 and is used for discharging methanol in the escaped gas from the liquid outlet pipe 6 after water washing.

The liquid outlet pipe 6 and the overflow pipe 7 are communicated with an underground tank main pipe 8 through a three-way pipeline, and in order to introduce the absorbed methanol water solution into the underground tank main pipe 8.

The utility model discloses a theory of operation and use flow: the pressure of the water seal tank is set to be 1.5KPa, the tank top of the methanol storage tank is introduced to the water seal tank 1 for water washing through the air inlet pipe 2, liquid flows into the underground tank main pipe 8 from the liquid outlet pipe 6 after water washing and enters the underground tank for recycling, the gas absorbed by the water seal tank 1 through water washing is discharged through the exhaust pipe I5 in a qualified mode, the overflow valve 12 of the water seal tank 1 controls the liquid level height of the water seal tank 1, the liquid higher than the liquid level height limited by the water seal tank 1 flows into the underground tank main pipe 8 from the overflow pipe 7, the situation that the pressure of the storage tank is high due to the fact that the liquid level of the water seal tank 1 is too high is prevented, the gas in the overflow pipe 7 is discharged from the exhaust pipe II 9, redundant gas in a pipeline can be discharged, the use efficiency of the pipeline is improved, and energy consumption is reduced.

Finally, the description is as follows: the above disclosure is only one specific embodiment of the present invention, however, the present invention is not limited thereto, and any changes that can be considered by those skilled in the art should fall within the protection scope of the present invention.

Claims (8)

1. The utility model provides a recovery unit of methyl alcohol tank field tank deck discharge, a serial communication port, including water seal tank (1), be equipped with intake pipe (2), blast pipe (3), drain pipe (6), overflow pipe (7) that are linked together with water seal tank (1) respectively on water seal tank (1), intake pipe (2) penetrate and extend to the below of the liquid level of water seal tank (1) by the top of water seal tank (1), drain pipe (6) are located the bottom of water seal tank (1), drain pipe (6) are linked together with underground groove house steward (8), the below of the liquid level height that water seal tank (1) was injectd is located in overflow pipe (7), overflow pipe (7) are linked together with underground groove house steward (8).

2. The methanol tank farm tank top vent gas recovery device of claim 1, wherein: and a second exhaust pipe (9) communicated with the overflow pipe (7) is arranged on the overflow pipe (7).

3. The methanol tank farm tank top vent gas recovery device of claim 1, wherein: be equipped with inlet tube (4) on water-sealed tank (1), be equipped with feed liquor valve (10) on inlet tube (4), be equipped with out liquid valve (11) on drain pipe (6), be equipped with overflow valve (12) on overflow pipe (7), be equipped with discharge valve (13) on blast pipe two (9).

4. The recovery device of the methanol tank farm tank top vent gas as set forth in claim 2, wherein: an elbow pipeline is connected between the overflow pipe (7) and the second exhaust pipe (9).

5. The methanol tank farm tank top vent gas recovery device of claim 1, wherein: the liquid level height department that water sealed tank (1) inside was injectd has seted up and has looked mirror mouth (5), see mirror mouth (5) internal seal and install transparent explosion-proof glass (14).

6. The methanol tank farm tank top vent gas recovery device of claim 1, wherein: the number of the air inlet pipes (2) is at least one.

7. The methanol tank farm tank top vent gas recovery device of claim 3, wherein: the water inlet pipe (4) is positioned above the liquid outlet pipe (6).

8. The methanol tank farm tank top vent gas recovery device of claim 1, wherein: the liquid outlet pipe (6) and the overflow pipe (7) are communicated with the underground tank main pipe (8) through a three-way pipeline.

Images