CN201139963Y

CN201139963Y - Pressured unpowered ammonia recovering device

Info

Publication number: CN201139963Y
Application number: CNU2007200283190U
Authority: CN
Inventors: 吴启
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-09-21
Filing date: 2007-09-21
Publication date: 2008-10-29
Anticipated expiration: 2017-09-21

Abstract

Disclosed is an unpowered ammonia recovery unit with tail gas under pressure. A heat exchanger A is composed of pipes B, O, L and I, and four heat exchanging devices, and a heat exchanger B is composed of pipes C, E, K and H and four heat exchanging devices. Mixed tail gas A under pressure passes through a heat exchanging device of the pipe B of the heat exchanger A, exits from the heat exchanger A to communicate with the pipe C of the heat exchanger B, and then exits from the heat exchanger B to communicate with an inlet of a separator, exits from the upper side outlet of the separator to communicate with the pipe E of the heat exchanger B, then exits from the heat exchanger B to communicate with the expansion end F of an expansion component, and exits from the expansion component to sequentially communicate with the heat exchanger B, the pipes H and I of the heat exchanger A, thereby forming the ammonia recovery unit. An outlet of the lower portion of the separator is connected with a throttle valve, the mixed tail gas A exits from the throttle valve to communicate with the heat exchanger B and the pipes K and L of the heat exchanger A, exits from the pipe L heat exchanging device of the heat exchanger A to communicate with a gas inlet pipe of the blasting end of the expansion component, then exits from the expansion component and the system. Finally, gas under pressure in pipe N exits from the heat exchanger A and is communicate with a gas inlet pipe of the expansion end of the expansion component.

Description

Band is pressed tail gas unpowered ammonia retracting device

Technical field:

The utility model relates to the chemical gases retracting device, relates in particular to band and presses tail gas unpowered ammonia retracting device.

Background technology:

At present, some contains the mixed tail gas of ammonia the synthetic ammonia chemical industry, and wherein the content of ammonia is higher, because recovery difficult is big, what have does altitude combustion, and what have directly makes high altitude discharge, has both wasted resource, has polluted environment again.In order to reduce cost, enterprise generally adopts the latent heat of liquefied ammonia, and is tentatively freezing, after small part reclaims, send the combustion furnace use that acts as a fuel, although reduced pollution, but and greatly reduce the use value of ammonia in the gaseous mixture, and in removal process, can increase the freezing load in enterprise's production system.The enterprise that has has also adopted the unpowered ammonia recovery, but band is pressed the tail gas total amount very little after the separation of ammonia, can not satisfy the needs of expansion unit refrigeration, causes the device ammonia recovery relatively low.The company that also has tested introducing external source band and pressed tail gas, behind first heat exchanger, directly removed the unit that expands, because it is too high to go out the outlet pressure medium of heat exchanger channel, caused the whole device rate of recovery on the low side.

The utility model content:

The purpose of this utility model is, overcome the deficiencies in the prior art part, provide a kind of band to press tail gas unpowered ammonia retracting device, can improve the use value that band is pressed the ammonia in the gaseous mixture preferably, reduce the freezing load in enterprise's production system, improve the rate of recovery of ammonia in the gaseous mixture.

Band described in the utility model is pressed tail gas unpowered ammonia retracting device, includes expansion unit, heat exchanger, separator and choke valve and forms.Use band described in the utility model to press tail gas unpowered ammonia retracting device, can press the ammonia in the mixed tail gas all to reclaim on band.In order to improve the rate of recovery of ammonia, increase the static energy that band is pressed tail gas, introduce the external source compressed gas by pipeline N, package unit all is to have utilized enterprise's production system band to press the overbottom pressure of tail gas, does not consume any power.The embodiment of taking of the present utility model is: band is pressed mixed tail gas A, by heat exchanger first channel B heat-exchanger rig, go out the heat exchanger first and connect heat exchanger second channel C, go out heat exchanger second and connect separator inlet, go out that side outlet meets heat exchanger second passage E on the separator, go out heat exchanger second and meet swollen lead aircraft group expanding end F, go out passage H, I that the decompressor expanding end connects heat exchanger second, heat exchanger first successively, connect enterprise's production system then.The N pipeline is the external source compressed gas, by meeting expansion unit expanding end F behind the heat exchanger first passage O.Side outlet connects choke valve under the separator, go out passage K, L heat-exchanger rig that choke valve connects heat exchanger second and heat exchanger first successively, go out heat exchanger first passage L heat-exchanger rig, connect expansion unit air blast end admission line, the unit that goes out to expand goes out system, connects enterprise's production system then.The heat exchanger first comprises channel B, O, L, I and quadruplet heat-exchanger rig and combines, and heat exchanger second comprises channel C, E, K, H and quadruplet heat-exchanger rig and combines, and the expansion unit has expanding end and air blast end to combine.Band presses mixed tail gas A to connect heat exchanger first channel B heat-exchanger rig, go out the channel C heat-exchanger rig that the heat exchanger first connects heat exchanger second, go out heat exchanger second and connect separator inlet, go out that side outlet meets heat exchanger second pipeline E on the separator, go out heat exchanger second and meet expansion unit expanding end F, the unit that goes out to expand connects heat exchanger second successively, and heat exchanger first passage H, I go out device then.The separator lower part outlet connects choke valve, go out choke valve and connect heat exchanger second and heat exchanger first passage K, L heat-exchanger rig successively, go out the heat exchanger first and connect expansion unit air blast end admission line, go out decompressor and go out system, the pipe pressurized gas of N connects heat exchanger first passage O heat-exchanger rig, go out heat exchanger first passage L heat-exchanger rig, connect expansion unit air blast end admission line.The unit that goes out to expand goes out system, and pipeline N compressed gas goes out the heat exchanger first, connects expansion unit expanding end admission line.Said heat exchanger is one or two, and any one heat exchanger channel number and heat-exchanger rig can be two, three or four, and the expansion unit can be that one to three grade of serial connection forms.The N gas pipeline can with enter the decompressor group after the E gas pipeline mixes, also can separately enter every cover expansion unit.

Because the utility model has utilized static energy that band presses tail gas by the expansion unit, freezing recovery ammonia has been introduced the external source band and has been pressed tail gas, and has structurally taked L channel media go into the to expand form of unit air blast end, can realize with the unpowered ammonia recovery of pressing tail gas.Not only improved band and pressed the rate of recovery of ammonia in the tail gas, and do not consume the freezing load in enterprise's production system in removal process, device can the long period safe and stable operation.The utility model overall structure is simple, installation and easy for operation.

Description of drawings:

Accompanying drawing is the structural representation that the utility model band is pressed tail gas unpowered ammonia retracting device.1, heat exchanger first 2, heat exchanger second 3, separator 4, choke valve 5, expansion unit

The specific embodiment:

Referring now to accompanying drawing, be described as follows in conjunction with example: band described in the utility model is pressed tail gas unpowered ammonia retracting device, includes pipeline A, B, C, E, F, H, I, K, L, M, N, O, heat exchanger first 1, heat exchanger second 2, separator 3, choke valve 4 and expansion unit 5 and forms.Use band described in the utility model to press tail gas unpowered ammonia retracting device, can press the ammonia in the mixed tail gas all to reclaim on band.In order to improve the rate of recovery of ammonia, increase band and press the static energy of tail gas, pipeline L outlet medium connects expansion unit 5 air blast end inlet pipelines, introduces the external source compressed gas by pipeline N, package unit all is to have utilized enterprise's production system band to press the overbottom pressure of tail gas, does not consume any power.The technical scheme that the utility model is taked is: band presses mixed tail gas A to be connected with heat exchanger first 1, goes out the pipeline B of heat exchanger first 1, goes into heat exchanger second 2, connects the inlet of separator 3, goes out side outlet on the separator 3, meets the pipeline E of heat exchanger second 2.By pipeline E, go out heat exchanger second 2, connect expansion unit 5, expanding end admission line F, the unit 5 that goes out to expand meets pipeline H, the I of heat exchanger second 2 and hot device first 1 successively, goes out ammonia recovery unit described in the utility model then, connects enterprise's production system.Among the pipeline N external source compressed gas, by meeting the expanding end F of expansion unit 5 after the heat exchanger first 1.3 times side outlets of separator connect choke valve 4, go out pipeline K, L that choke valve 4 connects heat exchanger second 2 and hot device first 1 successively.Go out the pipeline L of hot device first 1, connect expansion unit 5 air blast ends, the unit 5 air blast ends that go out to expand connect enterprise's production system, and band presses tail gas unpowered ammonia retracting device to have one or two heat exchanger, primary separator, expansion unit, choke valve and pipeline thereof to be formed by connecting.Hot device first 1 comprises channel B, O, L, I and quadruplet heat-exchanger rig and combines, and heat exchanger 2 comprises channel C, E, K, H and quadruplet heat-exchanger rig and combines.Heat exchanger is one or two, and any one heat exchanger channel and heat-exchanger rig can be two, three or four, and expansion unit 5 can be that one to three grade of serial connection forms.Because the utility model has utilized static energy that band presses tail gas by the expansion unit, freezing recovery ammonia has been introduced the external source band and has been pressed tail gas, and has structurally taked L channel media go into the to expand form of unit air blast end, can realize with the unpowered ammonia recovery of pressing tail gas.Not only improved band and pressed the rate of recovery of ammonia in the tail gas, and do not consume the freezing load in enterprise's production system in removal process, device can the long period safe and stable operation.The utility model overall structure is simple, installation and easy for operation.

Claims

1, a kind of with the unpowered ammonia retracting device of pressing tail gas, it is characterized in that heat exchanger first (1) contains pipeline B, O, L, I, form with the quadruplet heat-exchanger rig, heat exchanger second (2) contains pipeline C, E, K, H, combine with the quadruplet heat-exchanger rig, band is pressed mixed tail gas A, by heat exchanger first 1 channel B heat-exchanger rig, go out heat exchanger first (1) and connect heat exchanger second (2) channel C, go out heat exchanger second (2) and connect separator (3) inlet, go out separator (3) and go up the pipeline E that side outlet connects heat exchanger second (2), go out heat exchanger second (2) and meet expansion unit (5) expanding end F, the unit (5) that goes out to expand connects heat exchanger second (2) successively, the pipeline H of heat exchanger first (1), I goes out ammonia recovery unit described in the utility model then; Separator (3) lower part outlet connects choke valve (4), go out pipeline K, L that choke valve (4) connects heat exchanger second (2) and heat exchanger first (1) successively, go out heat exchanger first (1) passage L heat-exchanger rig, connect expansion unit (5) air blast end admission line, the unit (5) that goes out to expand goes out system, pipeline N compressed gas goes out heat exchanger first (1), connects expansion unit (5) expanding end admission line.

2, band according to claim 1 is pressed tail gas unpowered ammonia retracting device, it is characterized in that, heat exchanger is one or two, and any one heat exchanger channel number and heat-exchanger rig can be two, three or four, and expansion unit (5) can be that one to three grade of serial connection forms.