CN214222759U

CN214222759U - Methanol synthesis purge gas washing system

Info

Publication number: CN214222759U
Application number: CN202022790634.5U
Authority: CN
Inventors: 王图钦; 袁社路; 韩永亮; 秦伟; 刘晓刚; 杨鹏; 李忠勇
Original assignee: Shaanxi Changqing Energy & Chemical Co ltd
Current assignee: Shaanxi Changqing Energy & Chemical Co ltd
Priority date: 2020-11-26
Filing date: 2020-11-26
Publication date: 2021-09-17
Anticipated expiration: 2030-11-26

Abstract

The utility model discloses a methanol synthesis purge gas washing system, which relates to the technical field of coal chemical industry, and comprises a washing tower and a sub-high pressure boiler, wherein one side of the washing tower is connected with a liquid inlet pipe, one side of the bottom of the washing tower is connected with an air inlet pipe, one end of the liquid inlet pipe relative to the washing tower is connected with a desalted water booster pump, one side position of the liquid inlet pipe close to the washing tower is connected with a connecting pipe, and the liquid inlet pipe is provided with a second cut-off hand valve, the utility model adopts the sub-high pressure boiler feed water as purge gas washing liquid to replace the desalted water booster pump feed water, thereby realizing that the electricity charge can be saved by about 12 ten thousand yuan each year, simultaneously, the pipeline switching is simple and convenient, the switching difficulty of the desalted water booster pump is effectively reduced, and the adverse factors caused by the hydrogen recovery stable operation because of the switching difficulty of the desalted water booster pump are greatly reduced, to facilitate stable operation of hydrogen recovery.

Description

Methanol synthesis purge gas washing system

Technical Field

The utility model belongs to the technical field of the coal chemical industry, concretely relates to methanol synthesis purge gas washing system.

Background

The methanol synthesis reaction mainly comprises the reaction of carbon monoxide, carbon dioxide and hydrogen under the action of a catalyst to generate methanol. The conversion per pass of methanol synthesis is low, reacted gas is recycled, and methane, nitrogen, argon and other inert gases in the synthesis gas do not participate in the reaction and are called methanol synthesis reaction inert gases, the pressure of an accumulation system of the inert gases in the system is higher and higher, the effective partial pressure of effective gases is reduced, the whole synthesis reaction is unfavorable, therefore, a part of inert gases needs to be discharged through purge gas to achieve balance of the inert gases in the system, the part of purge gas has effective gases with high content, the hydrogen-carbon ratio of the system needs to be regulated through recycling of a hydrogen recycling device, methanol carried in the purge gas is recycled before entering the hydrogen recycling device, methanol loss is avoided, and stable operation of the hydrogen recycling device is facilitated. Because methanol can be well dissolved with water, the methanol is generally washed and recovered by desalted water, and because the pressure of desalted water of a pipe network is only about 0.7Mpa and can not enter a system, two desalted water booster pumps (one is opened and the other is prepared) are arranged to boost the desalted water so as to achieve the purpose of washing.

However, at present, the washing water of the synthesis purge gas washing tower is provided by two plunger pumps (single power is 30KW, one is opened and the other is prepared), and because the two pumps are difficult to switch on line in the operation process, the hydrogen recovery system is forced to stop if the switching is unsuccessful, and adverse effects are caused on the synthesis and the stable operation of the hydrogen recovery system.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a methanol synthesis speed of releasing washing system to solve the problem that proposes in the above-mentioned background art, reach and practice thrift the charges of electricity, reduce the switching degree of difficulty of plunger pump, the effect of the hydrogen of being convenient for is retrieved.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a synthetic gassing washing system of dying of methyl alcohol, includes scrubbing tower and inferior high pressure boiler, one side of scrubbing tower is connected with the feed liquor pipe, and is connected with the intake pipe in bottom one side of scrubbing tower, the feed liquor pipe is connected with the desalinized water booster pump for the one end of scrubbing tower, one side position department that the feed liquor pipe is close to the scrubbing tower is connected with the connecting pipe, and installs the second on the feed liquor pipe and cut off the hand valve, bottom one side of inferior high pressure boiler is connected with the feed pipe, and is connected with the conveyer pipe between feed pipe and the connecting pipe, the conveyer pipe is close to one side position department of inferior high pressure boiler and installs the first hand valve that cuts off, and one side position department that the conveyer pipe is close to the scrubbing tower installs flow control valve.

Preferably, first connecting flanges are installed at the two ends of the conveying pipe, the two first connecting flanges extend outwards to form positioning convex rings relative to one side of the conveying pipe, the water feeding pipe and one end of the connecting pipe are fixed with second connecting flanges, one sides of the two second connecting flanges are recessed inwards to form positioning grooves, and the positioning grooves correspond to the two positioning convex rings one to one respectively.

Preferably, a flow meter is further installed on the liquid inlet pipe, and the flow meter is located between the second cut-off hand valve and the desalted water pressurizing pump.

Preferably, a sealing gasket is arranged inside the positioning groove in a padded mode, and the cross section shape of the sealing gasket is matched with that of the positioning groove.

Preferably, the outer circumference of location bulge loop is gone up to extend outward and is formed with four stoppers, and four stoppers are the annular array and distribute, positioning groove's inner wall is seted up with the spacing groove of four stopper one-to-one.

Preferably, the opposite corners of one end of the limiting block, which is far away from the positioning convex ring, are transited by arc chamfers to form an arc part with a smooth surface wall.

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

(1) the utility model discloses a inferior high-pressure boiler feedwater is as the washing liquid of bleeding to replace the demineralized water booster pump feedwater, thereby realize can practice thrift about 12 ten thousand yuan of charges of electricity each year (30KW power 8000h 0.5 yuan/Kw 12 ten thousand yuan), the pipeline switches portably simultaneously, the effectual switching degree of difficulty that reduces the demineralized water booster pump, great reduction because of the demineralized water booster pump switch the degree of difficulty give the hydrogen greatly retrieve the unfavorable factor that steady operation caused, so that the steady operation of hydrogen recovery.

(2) The utility model can realize the quick positioning of the first connecting flange and the second connecting flange through the arrangement of the first connecting flange, the second connecting flange, the positioning convex ring and the positioning groove, thereby realizing the quick installation of the conveying pipe, effectively improving the installation efficiency of the conveying pipe and being convenient for the conveying of the feeding water of the secondary high-pressure boiler;

in addition, through the setting of stopper and spacing groove, can realize location bulge loop and positioning groove's spacing for firm grafting between location bulge loop and the positioning groove, thereby the quick assembly disassembly of the conveyer pipe of further being convenient for.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic structural view of a first connecting flange of the present invention;

fig. 3 is a schematic structural view of a second connecting flange of the present invention;

FIG. 4 is a schematic structural view of the second coupling flange after the seal ring of the present invention is removed;

in the figure: 1-time high pressure boiler; 2-a water supply pipe; 3-first shut-off hand valve; 4-a conveying pipe; 5-flow regulating valve; 6-a washing tower; 7-a first connecting flange; 8-a second connecting flange; 9-connecting pipe; 10-a liquid inlet pipe; 11-a second shut-off hand valve; 12-a flow meter; 13-desalted water booster pump; 14-positioning convex ring; 15-a limiting block; 16-a sealing gasket; 17-a positioning groove; 18-a limiting groove; 19-air inlet pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the present invention provides the following technical solutions: the utility model provides a synthetic purge gas washing system of methyl alcohol, including scrubbing tower 6 and inferior high pressure boiler 1, one side of scrubbing tower 6 is connected with feed liquor pipe 10, and bottom one side of scrubbing tower 6 is connected with intake pipe 19, feed liquor pipe 10 is connected with desalinized water booster pump 13 for the one end of scrubbing tower 6, one side position department that feed liquor pipe 10 is close to scrubbing tower 6 is connected with connecting pipe 9, and install the second on the feed liquor pipe 10 and cut off hand valve 11, bottom one side of inferior high pressure boiler 1 is connected with feed pipe 2, and be connected with conveyer pipe 4 between feed pipe 2 and the connecting pipe 9, conveyer pipe 4 is close to one side position department of inferior high pressure boiler 1 and installs first hand valve 3 that cuts off, and conveyer pipe 4 is close to one side position department of scrubbing tower 6 and installs flow control valve 5.

Specifically, when the purge gas is washed, the purge gas is discharged into the washing tower 6 through the gas inlet pipe 19, at this time, a worker can open the first cut-off valve 3 to connect the water feed pipe 2 and the delivery pipe 4, and the next-time high-pressure boiler 1 discharges the next-time high-pressure boiler feed water into the delivery pipe 4 through the water feed pipe 2, and then the delivery pipe 4 feeds the next-time high-pressure boiler feed water into the liquid inlet pipe 10 through the connection pipe 9, and then feeds the next-time high-pressure boiler feed water into the washing tower 6 through the liquid inlet pipe 10 to wash the purge gas, and at the same time, the worker can adjust the flow rate of the washing liquid through the flow rate adjustment valve 5 to prevent the waste of the washing liquid and facilitate the washing of the purge gas;

in the washing process, a worker closes the second cut-off hand valve 11 and stops the desalted water booster pump 13 to realize that the feed water of the secondary high-pressure boiler is taken as the washing liquid of the purge gas without the desalted water booster pump 13, so that the energy consumption of the purge gas in washing is effectively reduced, and the electric charge is greatly saved;

in addition, when the delivery pipe 4 is out of order, a worker may close the first cutoff hand valve 3 and open the second cutoff hand valve 11, and deliver the desalted water into the liquid inlet pipe 10 through the desalted water pressurizing pump 13 to deliver the desalted water into the washing tower 6 through the liquid inlet pipe 10, thereby achieving switching of the piping to facilitate stable operation of hydrogen recovery.

In this embodiment, preferably, first connecting flanges 7 are all installed at the both ends of conveyer pipe 4, and two first connecting flanges 7 all outwards extend for one side of conveyer pipe 4 and are formed with location bulge loop 14, and feed pipe 2 all is fixed with second connecting flange 8 with the one end of connecting pipe 9, and one side of two second connecting flange 8 all inwards caves in and is formed with positioning groove 17, and two positioning groove 17 respectively with two location bulge loops 14 one-to-one.

Specifically, when conveyer pipe 4 installs, the workman can dock conveyer pipe 4 with second flange 8 on feed pipe 2 and the connecting pipe 9 respectively through first flange 7 at its both ends, this moment, the location bulge loop 14 of first flange 7 one end injects in the positioning groove 17 of second flange 8 one side, realize first flange 7 and second flange 8's quick location with this, then the workman fastens first flange 7 and second flange 8 through fastening bolt, realize conveyer pipe 4's quick installation with this, the effectual installation effectiveness who improves conveyer pipe 4, so that conveyer pipe 4's use.

In this embodiment, preferably, a flow meter 12 is further installed on the liquid inlet pipe 10, and the flow meter 12 is located between the second shut-off hand valve 11 and the desalted water pressurizing pump 13.

Specifically, when the desalted water booster pump 13 feeds the desalted water into the washing tower 6 through the liquid inlet pipe 10, the flow meter 12 can detect the flow rate of the desalted water in the liquid inlet pipe 10 so as to be grasped by a worker in real time.

In this embodiment, it is preferable that the inside of the positioning groove 17 is padded with a sealing gasket 16, and the cross-sectional shape of the sealing gasket 16 matches the cross-sectional shape of the positioning groove 17.

Specifically, when the positioning convex ring 14 and the positioning groove 17 are inserted, the sealing washer 16 can seal the joint of the positioning convex ring 14 and the positioning groove 17, so that the sealing is ensured when the conveying pipe 4 is connected, and the conveying of the feed water of the sub-high pressure boiler is facilitated.

In this embodiment, preferably, the outer circumference of the positioning convex ring 14 extends outwards to form four limiting blocks 15, the four limiting blocks 15 are distributed in an annular array, and the inner wall of the positioning groove 17 is provided with limiting grooves 18 corresponding to the four limiting blocks 15 one to one.

Specifically, when the positioning convex ring 14 is inserted into the positioning groove 17, the limiting block 15 is inserted into the limiting groove 18, so that the limiting of the positioning convex ring 14 and the positioning groove 17 is realized, the positioning convex ring 14 and the positioning groove 17 are stably inserted, and the conveying pipe 4 is further convenient to disassemble and assemble.

In this embodiment, preferably, opposite corners of one end of the limiting block 15 away from the positioning convex ring 14 are all transited by circular arc chamfers to form a smooth arc portion of the surface wall.

Specifically, the arc portion with smooth surface wall can facilitate the rapid insertion of the limiting block 15 into the limiting groove 18, so that the rapid insertion of the limiting block 15 and the limiting groove 18 is realized.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A methanol synthesis purge gas washing system is characterized in that: comprises a washing tower (6) and a secondary high-pressure boiler (1), one side of the washing tower (6) is connected with a liquid inlet pipe (10), and one side of the bottom of the washing tower (6) is connected with an air inlet pipe (19), one end of the liquid inlet pipe (10) opposite to the washing tower (6) is connected with a desalted water booster pump (13), a connecting pipe (9) is connected at one side of the liquid inlet pipe (10) close to the washing tower (6), a second cut-off hand valve (11) is arranged on the liquid inlet pipe (10), one side of the bottom end of the secondary high-pressure boiler (1) is connected with a water supply pipe (2), a delivery pipe (4) is connected between the water supply pipe (2) and the connecting pipe (9), a first cut-off hand valve (3) is arranged at one side of the conveying pipe (4) close to the secondary high-pressure boiler (1), and a flow regulating valve (5) is arranged at one side of the conveying pipe (4) close to the washing tower (6).

2. The methanol synthesis purge gas scrubbing system of claim 1, wherein: first flange (7) are all installed at the both ends of conveyer pipe (4), and two first flange (7) all outwards extend for one side of conveyer pipe (4) and are formed with location bulge loop (14), feed pipe (2) all are fixed with second flange (8) with the one end of connecting pipe (9), and one side of two second flange (8) all inwards cave in and are formed with positioning groove (17), two positioning groove (17) respectively with two location bulge loops (14) one-to-one.

3. The methanol synthesis purge gas scrubbing system of claim 1, wherein: and a flowmeter (12) is further installed on the liquid inlet pipe (10), and the flowmeter (12) is positioned between the second cut-off hand valve (11) and the desalted water booster pump (13).

4. The methanol synthesis purge gas scrubbing system of claim 2, wherein: and a sealing gasket (16) is arranged in the positioning groove (17) in a cushioning manner, and the cross section shape of the sealing gasket (16) is matched with that of the positioning groove (17).

5. The methanol synthesis purge gas scrubbing system of claim 2, wherein: the outer circumference of location bulge loop (14) is gone up and is outwards extended and be formed with four stopper (15), and four stopper (15) are the annular array and distribute, spacing groove (18) with four stopper (15) one-to-one are seted up to the inner wall of positioning groove (17).

6. The methanol synthesis purge gas scrubbing system of claim 5, wherein: the opposite corners of one end of the limiting block (15) far away from the positioning convex ring (14) are in arc chamfer transition to form smooth arc parts of the surface wall.