CN203159210U - Liquid nitrogen washing device - Google Patents
Liquid nitrogen washing device Download PDFInfo
- Publication number
- CN203159210U CN203159210U CN 201320046713 CN201320046713U CN203159210U CN 203159210 U CN203159210 U CN 203159210U CN 201320046713 CN201320046713 CN 201320046713 CN 201320046713 U CN201320046713 U CN 201320046713U CN 203159210 U CN203159210 U CN 203159210U
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- gas
- water cooler
- unstripped gas
- nitrogen
- pipeline
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Abstract
The utility model discloses a liquid nitrogen washing device which comprises a cooling box and a temperature control bypass, wherein a high-pressure nitrogen cooler, a first raw material gas cooler, a second raw material gas cooler, a raw material gas-liquid separator, a nitrogen wash tower and a plurality of pipelines are arranged in the cooling box; the temperature control bypass is arranged in a raw material gas pipeline and connected with a part of the raw material gas pipeline in parallel, which penetrates through the first raw material gas cooler, and the temperature control bypass comprises a temperature control valve; a temperature sensor is arranged on the raw material gas pipeline, which is in an inlet of the raw material gas-liquid separator; and the temperature sensor is in signal communication with the temperature control valve which responds to a signal sent by the temperature sensor so as to be opened or closed with the corresponding opening.
Description
Technical field
The utility model relates to a kind of device that purifies unstripped gas, relates more specifically to the liquid nitrogen washing device.
Background technology
The scrubbing with liquid nitrogen method is the technology of crude synthesis gas being carried out final purification.It is mainly used in removing CO, CH in the crude synthesis gas
4Deng minor component, also synthetic gas is joined nitrogen simultaneously and make it satisfy ammonia synthesis to H
2, N
2The requirement of ratio.The principle of its purification is: the high pressure nitrogen with having liquefied, wash unstripped gas in nitrogen wash column, thereby the minor components such as CO in the crude synthesis gas removed.The loss of refrigeration capacity of liquid nitrogen washing device (being heat transfer temperature loss and refrigerating loss) compensates for by the cold effect that unstripped gas is joined in the nitrogen process, the Joule-Thomson effect that takes place produces, Joule-Thomson effect produces cold and is not enough to compensate for cold damage when high pressure nitrogen pressure is low, also must lean on liquid nitrogen vaporization to replenish not enough cold.This purifying method has the degree of purification height that makes synthetic gas (as CO content about 2ppm) and the low characteristics of working cost.
But existing liquid nitrogen washing device, some device is at CH
4Content is the process gas of trace, for the high CH of the strange gasifying process generation in Shandong
4The process gas of content can't be handled, and works as CH
4The high process gas of content by the time CH can take place
4Freeze stifled situation, let alone reclaim and comprehensive utilization; The device that has can be handled the high CH that the strange gasifying process in Shandong produces
4The process gas of content, but technical process complexity, operation easier is big.
The utility model content
The purpose of this utility model provides the liquid nitrogen washing device, can handle high CH
4The process gas of content is at the CO that purifies trace comprehensive reutilization CH again simultaneously
4, flow process is simple, and operation is simple.
To achieve these goals, the utility model provides a kind of liquid nitrogen washing device, comprise ice chest, be provided with the high pressure nitrogen water cooler in the described ice chest, the first unstripped gas water cooler, the second unstripped gas water cooler, the unstripped gas gas-liquid separator, nitrogen wash column and a plurality of pipeline, unstripped gas pipeline from adsorber passes the first unstripped gas water cooler, pass the second unstripped gas water cooler again, and being connected to the unstripped gas gas-liquid separator again after drawing from the middle part of the second unstripped gas water cooler, the unstripped gas gas pipeline of drawing from the unstripped gas gas-liquid separator passes the intake that is connected to the nitrogen wash column bottom behind the second unstripped gas water cooler again; Pass the top that is connected to nitrogen wash column behind high pressure nitrogen water cooler, the first unstripped gas water cooler and the second unstripped gas water cooler from the high pressure nitrogen pipeline of battery limit (BL); After passing the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler successively, the nitrogen gas washing pipeline of being drawn by the nitrogen wash column top leaves ice chest; Wherein, comprise also being arranged on temperature control bypass in parallel with the unstripped gas pipe section that passes the first unstripped gas water cooler in the unstripped gas pipeline that temperature control bypass comprises the temperature control valve; And the unstripped gas pipeline in the ingress of unstripped gas gas-liquid separator is provided with temperature sensor; Temperature sensor is communicated with the temperature-sensing valve gating signal, and the signal that the temperature control valve sends in response to temperature sensor opens or closes to corresponding aperture.
Further, in ice chest, also be provided with hydrogen gas segregator, the pipeline that draw at hydrogen gas segregator and nitrogen wash column middle part is communicated with, and leaves ice chest after the Hydrogen Line of being drawn by the hydrogen gas segregator top passes the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler.
Further, also comprise the fluid pipeline of drawing from the hydrogen gas segregator bottom, fluid pipeline is connected to the fuel gas gas-liquid separator, leaves ice chest after the fuel gas pipeline of being drawn by fuel gas gas-liquid separator top passes the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler.
Further, also comprise the high methane gas liquid/gas separator, the fluid pipeline of being drawn by nitrogen wash column bottom and the fluid pipeline of being drawn by unstripped gas gas-liquid separator bottom connect the high methane gas liquid/gas separator, leave ice chest after the pipeline of being drawn by the high methane gas liquid/gas separator passes the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler.
Further, the nitrogen gas washing pipeline between the first unstripped gas water cooler and the second unstripped gas water cooler is provided with gas mixer, and gas mixer is communicated with the high pressure nitrogen pipeline.
The utlity model has following advantage:
By temperature control bypass is set at the first unstripped gas water cooler place, control the unstripped gas scale of construction that flows through the first unstripped gas water cooler, thereby can control the temperature that incoming stock gas gas-liquid is divided the unstripped gas of device, can prevent CH thus
4Occur solidifying.
By hydrogen recovery system is set, can reclaim the hydrogen in the liquid phase of leaving nitrogen wash column effectively.
And compare with existing liquid nitrogen wash process flow process, the utility model technical process is simple, flexible operation and effectively simple.
Description of drawings
Fig. 1 is the structural representation of an embodiment of liquid nitrogen washing device of the present utility model.
Embodiment
Be illustrated in figure 1 as according to a kind of liquid nitrogen washing device of the present utility model, comprise ice chest 7, be provided with high pressure nitrogen water cooler 3, the first unstripped gas water cooler 1, the second unstripped gas water cooler 2, unstripped gas gas-liquid separator 6, nitrogen wash column 4 and several pipelines in the ice chest 7.The unstripped gas pipeline of handling from molecular sieve adsorber is introduced into ice chest 1, at first introducing the first unstripped gas water cooler 1 cools off, then introducing the second unstripped gas water cooler 2 cools off, the unstripped gas pipeline is drawn from the middle part of the second unstripped gas water cooler 2, then introduce unstripped gas gas-liquid separator 6, with the liquid methane component in the separate raw materials gas.After unstripped gas pipeline after the separation of being drawn by unstripped gas gas-liquid separator 6 is introduced the second unstripped gas water cooler 2 again and is cooled off, draw from the bottom of the second unstripped gas water cooler 2, introduce the intake of the bottom of nitrogen wash column 4 at last, thereby in nitrogen wash column 4, wash.After passing high pressure nitrogen water cooler 3, the first unstripped gas water cooler 1 and the second unstripped gas water cooler 2 and carry out cooling liquid from the high pressure nitrogen pipeline of the air separation facility outside the battery limit (BL), introduce the top of nitrogen wash column 4, thereby utilize liquid nitrogen that unstripped gas is washed.The unstripped gas of introducing by nitrogen wash column 4 bottoms is further separated wherein liquid methane component in the nitrogen wash column tower reactor, gas phase enters the tower middle part by rising gas cap, the liquid nitrogen that contained impurity such as carbon monoxide, argon and methane are introduced by top in nitrogen wash column 4 in the unstripped gas removes, the purified gas that contains small amount of nitrogen after the purification is drawn from the nitrogen wash column cat head, and the nitrogen gas washing pipeline of being drawn by the nitrogen wash column cat head passes the second unstripped gas water cooler 2, the first unstripped gas water cooler 1 and high pressure nitrogen water cooler 3 successively and left ice chest 7 after the re-heat.
For the temperature of the unstripped gas of controlling incoming stock gas gas-liquid separator 6, prevent that CH4 from solidifying, the temperature control bypass in parallel with the unstripped gas pipe section that passes the first unstripped gas water cooler 1 is set, temperature control bypass comprises temperature control valve 5; Temperature control valve 5 is controlled the amount of the unstripped gas of the bypass of flowing through, thus the unstripped gas scale of construction that the first unstripped gas water cooler 1 is passed in control.Particularly, be provided with temperature sensor 13 at the imported materials gas pipeline that is connected to unstripped gas gas-liquid separator 6, temperature sensor 13 is for detection of the temperature of the unstripped gas of incoming stock gas gas-liquid separator 6; Temperature sensor 13 and temperature control valve 5 signal communication, temperature sensor 13 is sent to temperature control valve 5 with detected temperature signal.The signal that temperature control valve 5 sends in response to temperature sensor opens or closes corresponding aperture, by increasing or reduce the unstripped gas scale of construction through the first unstripped gas water cooler 1, control the unstripped gas temperature of incoming stock gas gas-liquid separator 6, thereby prevent CH
4Solidify.For example, when the temperature that detects unstripped gas gas-liquid separator 6 ingress when temperature sensor 13 is lower than design temperature, be arranged on the aperture that temperature control valve 5 in 1 bypass of the first unstripped gas water cooler will increase temperature control valve 5 automatically in response to the signal of temperature sensor 13 feedback, thereby reduce the unstripped gas scale of construction by the first unstripped gas water cooler 1, make the unstripped gas temperature of incoming stock gas gas-liquid separator 6 raise thus; Otherwise, when the temperature that detects unstripped gas gas-liquid separator 6 ingress when temperature sensor 13 is higher than design temperature, then be arranged on the aperture that temperature control valve 5 in 1 bypass of the first unstripped gas water cooler will reduce temperature control valve 5 automatically in response to the signal of temperature sensor 13 feedbacks; Thereby increase the unstripped gas scale of construction by the first unstripped gas water cooler 1, make the unstripped gas temperature of incoming stock gas gas-liquid separator 6 reduce thus.
Owing to always some H2 and other gas dissolving are arranged in the liquid that leaves nitrogen wash column 4, therefore in order to reclaim this part H
2, in another embodiment of the present utility model, in ice chest 7, can also be provided with hydrogen gas segregator 8.Hydrogen gas segregator 8 is communicated with the pipeline that draw at nitrogen wash column 4 middle parts, be provided with Liquid valve at this pipeline, when Liquid valve is opened, the liquid of being drawn by nitrogen wash column 4 middle parts through the valve decompression after, enter hydrogen gas segregator 8 and carry out flash distillation, the gas phase that flashes off namely is the hydrogen that will reclaim, and the Hydrogen Line that the hydrogen of recovery is drawn by hydrogen gas segregator 8 tops leaves ice chest 7 after introducing the second unstripped gas water cooler 2, the first unstripped gas water cooler 1 and 3 re-heats of high pressure nitrogen water cooler.
The fluid pipeline of liquid through drawing from the hydrogen gas segregator bottom by the discharge of hydrogen gas segregator 8 bottoms, after the Liquid valve decompression, introduce fuel gas gas-liquid separator 10, the fuel gas pipeline of being drawn by fuel gas gas-liquid separator 10 tops leaves ice chest 7 after through the second unstripped gas water cooler 2, the first unstripped gas water cooler 1 and 3 re-heats of high pressure nitrogen water cooler.
Also be provided with high methane gas liquid/gas separator 11 in the ice chest 7, the liquid pipe of being drawn by the nitrogen wash column tower reactor and introduce high methane gas liquid/gas separator 11 by the liquid that the liquid pipe that draw unstripped gas gas-liquid separator 6 bottoms is discharged their, and mix therein.Leave ice chest 7 after the fluid pipeline of being drawn by high methane gas liquid/gas separator 11 passes the second unstripped gas water cooler 2, the first unstripped gas water cooler 1 and 3 re-heats of high pressure nitrogen water cooler, use to reclaim.
Nitrogen gas washing pipeline between the first unstripped gas water cooler 1 and the second unstripped gas water cooler 2 is provided with gas mixer 12, and gas mixer 12 is communicated with the high pressure nitrogen pipeline.High pressure nitrogen is after high pressure nitrogen water cooler 3 and 1 cooling of the first unstripped gas water cooler, wherein major part is mixed gas mixer 12 through introducing gas mixer 12 nitrogen gas washings direct and that introduce from nitrogen gas washing pipeline after the throttling, substantially reach the hydrogen and nitrogen gas stoicheiometry after 3: 1, mixed gas is again through leaving ice chest 7 behind the first unstripped gas water cooler 1 and the high pressure nitrogen water cooler 3.
As a supplement, after liquid nitrogen process liquid nitrogen gas-liquid separator 9 separation from air separation facility, pass second feed gas chiller 2, first feed gas chiller 1 and high pressure nitrogen water cooler 3 for whole device replenishes cold by pipeline, leave ice chest 7 after the re-heat, use to reclaim.
The liquid nitrogen washing device that utilizes the utility model to provide is carried out following technical process.At first, the unstripped gas that the process adsorber is handled is introduced into the first unstripped gas water cooler and the second unstripped gas water cooler in the ice chest, and draw incoming stock gas gas-liquid separator separates liquid methane component at second unstripped gas water cooler middle part, unstripped gas after separating is flowed through behind the second unstripped gas water cooler again, enter nitrogen wash column, in nitrogen wash column after thereby scrubbing with liquid nitrogen has further separated the liquid methane component, drawn by the nitrogen wash column top, after the second unstripped gas water cooler and the first unstripped gas water cooler re-heat, send ice chest; Wherein, the material gas quantity that flows through the first unstripped gas water cooler by control is controlled the temperature of the unstripped gas of incoming stock gas gas-liquid separator, thereby prevents CH
4Solidify.The unstripped gas scale of construction that the first unstripped gas water cooler is flow through in control realizes that by with the unstripped gas pipe section that passes the first unstripped gas water cooler temperature control bypass in parallel is set in the unstripped gas pipeline temperature control bypass comprises the temperature control valve; The flow through unstripped gas scale of construction of bypass of temperature-sensing valve gate control, thus the unstripped gas scale of construction of the first unstripped gas water cooler is passed in control, and control the unstripped gas temperature of incoming stock gas gas-liquid separator thus.Be provided with temperature sensor in unstripped gas pipe connection to the ingress of unstripped gas gas-liquid separator, for detection of the temperature of the unstripped gas of incoming stock gas gas-liquid separator; Temperature sensor is communicated with the temperature-sensing valve gating signal, and temperature sensor is sent to the temperature control valve with the temperature signal that detects.The signal that the temperature control valve sends in response to temperature sensor opens or closes to corresponding aperture, thus by increasing or reduce the unstripped gas scale of construction through the first unstripped gas water cooler, control the unstripped gas temperature of incoming stock gas gas-liquid separator, thereby can prevent CH effectively
4Solidify.
And can also reclaim the hydrogen in the liquid in the nitrogen wash column by the device that the utility model provides.Hydrogen gas segregator is communicated with the pipeline that draw at the nitrogen wash column middle part, be provided with Liquid valve at this pipeline, when Liquid valve is opened, after the liquid process valve decompression of drawing in the middle part of the nitrogen wash column, enter hydrogen gas segregator and carry out flash distillation, the gas phase that flashes off namely is the hydrogen that will reclaim, and the Hydrogen Line that the hydrogen of recovery is drawn by the hydrogen gas segregator top leaves ice chest after introducing the second unstripped gas water cooler, the first unstripped gas water cooler and the re-heat of high pressure nitrogen water cooler.
Claims (5)
1. liquid nitrogen washing device, comprise ice chest, be provided with the high pressure nitrogen water cooler in the described ice chest, the first unstripped gas water cooler, the second unstripped gas water cooler, the unstripped gas gas-liquid separator, nitrogen wash column and a plurality of pipeline, unstripped gas pipeline from adsorber passes the first unstripped gas water cooler, pass the second unstripped gas water cooler again, and being connected to the unstripped gas gas-liquid separator again after drawing from the middle part of the second unstripped gas water cooler, the Primordial Qi gas pipeline of drawing from the unstripped gas gas-liquid separator passes the intake that is connected to the nitrogen wash column bottom after second feed cooler again; Pass the top that is connected to nitrogen wash column behind high pressure nitrogen water cooler, the first unstripped gas water cooler and the second unstripped gas water cooler from the high pressure nitrogen pipeline of battery limit (BL); After passing the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler successively, the nitrogen gas washing pipeline of being drawn by the nitrogen wash column top leaves ice chest; It is characterized in that also comprise being arranged on temperature control bypass in parallel with the unstripped gas pipe section that passes the first unstripped gas water cooler in the unstripped gas pipeline, temperature control bypass comprises the temperature control valve; And the unstripped gas pipeline in the ingress of unstripped gas gas-liquid separator is provided with temperature sensor; Temperature sensor is communicated with the temperature-sensing valve gating signal, and the signal that the temperature control valve sends in response to temperature sensor opens or closes to corresponding aperture.
2. liquid nitrogen washing device as claimed in claim 1, it is characterized in that, in ice chest, also be provided with hydrogen gas segregator, the pipeline that draw at hydrogen gas segregator and nitrogen wash column middle part is communicated with, and leaves ice chest after the Hydrogen Line of being drawn by the hydrogen gas segregator top passes the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler.
3. liquid nitrogen washing device as claimed in claim 2, it is characterized in that, also comprise the fluid pipeline of drawing from the hydrogen gas segregator bottom, fluid pipeline is connected to the fuel gas gas-liquid separator, leaves ice chest after the fuel gas pipeline of being drawn by fuel gas gas-liquid separator top passes the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler.
4. liquid nitrogen washing device as claimed in claim 1, it is characterized in that, also comprise the high methane gas liquid/gas separator, the fluid pipeline of being drawn by nitrogen wash column bottom and the fluid pipeline of being drawn by unstripped gas gas-liquid separator bottom connect the high methane gas liquid/gas separator, leave ice chest after the pipeline of being drawn by the high methane gas liquid/gas separator passes the second unstripped gas water cooler, the first unstripped gas water cooler and high pressure nitrogen water cooler.
5. liquid nitrogen washing device as claimed in claim 1 is characterized in that, the nitrogen gas washing pipeline between the first unstripped gas water cooler and the second unstripped gas water cooler is provided with gas mixer, and gas mixer is communicated with the high pressure nitrogen pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320046713 CN203159210U (en) | 2013-01-29 | 2013-01-29 | Liquid nitrogen washing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320046713 CN203159210U (en) | 2013-01-29 | 2013-01-29 | Liquid nitrogen washing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203159210U true CN203159210U (en) | 2013-08-28 |
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ID=49020413
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320046713 Expired - Lifetime CN203159210U (en) | 2013-01-29 | 2013-01-29 | Liquid nitrogen washing device |
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| Country | Link |
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| CN (1) | CN203159210U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112824A (en) * | 2013-01-29 | 2013-05-22 | 北京新峰泰克工程技术有限公司 | Liquid nitrogen wash device and method for purifying raw material gas |
-
2013
- 2013-01-29 CN CN 201320046713 patent/CN203159210U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103112824A (en) * | 2013-01-29 | 2013-05-22 | 北京新峰泰克工程技术有限公司 | Liquid nitrogen wash device and method for purifying raw material gas |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130828 |
|
| DD01 | Delivery of document by public notice | ||
| DD01 | Delivery of document by public notice |
Addressee: Lu Xinyan Document name: Notice of termination of patent right |