CN218510692U - Ammonia discharge device of ammonia synthesis cold exchanger - Google Patents
Ammonia discharge device of ammonia synthesis cold exchanger Download PDFInfo
- Publication number
- CN218510692U CN218510692U CN202120738578.2U CN202120738578U CN218510692U CN 218510692 U CN218510692 U CN 218510692U CN 202120738578 U CN202120738578 U CN 202120738578U CN 218510692 U CN218510692 U CN 218510692U
- Authority
- CN
- China
- Prior art keywords
- ammonia
- flash tank
- pressure liquid
- cold
- cold exchanger
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Separation By Low-Temperature Treatments (AREA)
Abstract
The utility model provides a cold interchanger ammonia discharging device of ammonia synthesis, including cold interchanger, there is low pressure liquid ammonia flash tank bottom of cold interchanger through the tube coupling, the play liquid end of low pressure liquid ammonia flash tank is connected with the ammonia ball jar, the exhaust end of low pressure liquid ammonia flash tank is connected with washes the ammonia device, follow on the pipeline cold interchanger extremely the direction of low pressure liquid ammonia flash tank has set gradually trip valve, gas flowmeter and electromagnetic control valve, electromagnetic control valve connects in parallel and is provided with two, be provided with the level gauge in the cold interchanger, the signal output part of level gauge is connected with the controller through the wire, electromagnetic control valve, trip valve, gas flowmeter all with the controller electricity is connected. The automatic adjustment of ammonia discharge is realized, the hidden danger of high-pressure serial low pressure caused by judging ammonia discharge by the experience of operators is eliminated, the accident occurrence rate is reduced, the adjustment time is shortened by the automatic adjustment of the electromagnetic adjusting valve under the condition of abnormal liquid level, and the powerful guarantee is provided for the safe and stable operation of the system.
Description
Technical Field
The utility model belongs to the technical field of the cold exchanger of ammonia synthesis, specifically be a prevent device of liquid ammonia spherical tank superpressure.
Background
Ammonia is an important chemical raw material, is mainly used for producing various nitrogen-containing chemical fertilizers, such as urea, ammonium nitrate, ammonium sulfate, ammonium phosphate, ammonium chloride, ammonia water, various nitrogen-containing mixed fertilizers, compound fertilizers and the like, is mainly used for preparing ammonia water, liquid ammonia, nitric acid, ammonium salt and soda ash in an inorganic aspect, and is widely applied to synthetic fibers, plastics, dyes, urea and the like in an organic aspect.
In the process of synthesizing ammonia, a cold exchanger is used as a cooling separation device, more than 50% of liquid ammonia is separated at the cold exchanger, the separated liquid ammonia is conveyed to an ammonia ball tank for storage, the method for manually discharging the liquid ammonia from the cold exchanger at present is to manually operate the cold exchanger, but the pressure of ammonia synthesis gas contained in the cold exchanger is far greater than the storage pressure of the ammonia ball tank, the manual ammonia discharge can not observe the liquid level condition in the cold exchanger, the experience of an operator judges the ammonia discharge, and high-pressure gas in the cold exchanger can be caused to flow into the low-pressure ammonia ball tank due to the fact that the liquid level in the cold exchanger is too low when the ammonia discharge is not in time or the ammonia discharge is too much, so that the production risk and the probability of accidents are greatly increased, and the workload of the operator is increased by the manual ammonia discharge.
SUMMERY OF THE UTILITY MODEL
The utility model overcomes prior art's is not enough, provides a prevent device of liquid ammonia spherical tank superpressure, and the purpose is solved at present because of the manual untimely incident problem that perhaps the ammonia output too much caused of putting.
In order to achieve the above purpose, the present invention is achieved by the following technical solutions.
The utility model provides a cold interchanger jettison gear of ammonia synthesis, includes cold interchanger, there is low pressure liquid ammonia flash tank bottom of cold interchanger through the tube coupling, the play liquid end of low pressure liquid ammonia flash tank is connected with the ammonia ball jar, the exhaust end of low pressure liquid ammonia flash tank is connected with washes the ammonia device, follow on the pipeline cold interchanger extremely the direction of low pressure liquid ammonia flash tank has set gradually trip valve, gas flowmeter and electromagnetic control valve, electromagnetic control valve connects in parallel and is provided with two, be provided with the level gauge in the cold interchanger, the signal output part of level gauge has the controller through the wire connection, electromagnetic control valve, trip valve, gas flowmeter all with the controller electricity is connected.
Further, the low-pressure liquid ammonia flash tank is a low-pressure liquid ammonia flash tank with the storage pressure of less than 5 MPa.
The method is further characterized in that the cold exchanger comprises a heat exchanger arranged above and a separator arranged below, and the heat exchanger is a shell-and-tube heat exchanger.
The utility model discloses produced beneficial effect does for prior art: the utility model discloses realized the automatically regulated completely and put the ammonia, eliminated the experience that relies on the operative employee and judged putting the ammonia, caused the hidden danger of high pressure cluster low pressure, reduced the incidence of accident to through electromagnetic control valve's automatically regulated under the liquid level abnormal conditions, shortened adjust time, provide strong guarantee for the safety and stability operation of system.
Drawings
The present invention will be further explained with reference to the accompanying drawings;
FIG. 1 is a schematic flow diagram of the present invention;
wherein, 1 is cold exchange, 2 is the trip valve, 3 is gas flowmeter, 4 are electromagnetic adjusting valve, 5 are low pressure liquid ammonia flash tanks, 6 are ammonia spherical tank, 7 are ammonia washing device.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clear, the present invention is further described in detail with reference to the accompanying embodiments and drawings, it should be understood that the specific embodiments described herein are only used for explaining the present invention, and are not used for limiting the present invention.
As shown in fig. 1, the utility model discloses 1 ammonia discharging device of synthetic cold exchanger of ammonia, including cold exchanger 1, cold exchanger 1 is including setting up the shell and tube type heat exchanger in the top and setting up the separator in the below, there is low pressure liquid ammonia flash tank 5 bottom of cold exchanger 1 through the tube coupling, the storage pressure of low pressure liquid ammonia flash tank 5 is less than 5MPa, liquid outlet of low pressure liquid ammonia flash tank 5 is connected with ammonia ball jar 6, the exhaust end of low pressure liquid ammonia flash tank 5 is connected with washes ammonia device 7, in order to avoid the ammonia to discharge aloft, the one end that low pressure liquid ammonia flash tank 5 kept away from cold exchanger 1 is connected with ammonia ball jar 6, the trip valve 2 has been set gradually along the direction of cold exchanger 1 to low pressure liquid ammonia flash tank 5 on the pipeline, gas flow meter 3 and electromagnetic control valve 4, electromagnetic control valve 4 connects in parallel and is provided with two, be provided with the level gauge in cold exchanger 1, the signal output part of level gauge is connected with the controller through the wire, electromagnetic control valve 4, trip valve 2, gas flow meter 3 all is connected with the controller electricity.
The working process is that the hydrogen-rich tail gas (8253 Nm3/h, the hydrogen content is 80%) which is the byproduct of the liquefaction of the LNG device, the hydrogen gas (7613 Nm3/h, the hydrogen content is 99.84%) sent by the purification device and the nitrogen gas (3213 Nm3/h) sent by an outdoor air separation device are taken as raw material gases, and a small amount of CO and CO in the raw material gases are removed through methanation reaction 2 The harmful substances are fed into an alkylation water separator to be separated from water, and used as fresh make-up gas to be mixed with circulating gas, then the mixture is pressurized to 15MPa by a compressor, fed into an oil separator, and fed into a synthesis tower after mechanical oil is removedThe reaction hot gas from the synthesis tower is cooled to 40 ℃ below zero through a waste heat recoverer, a feed water heater and a water cooler, then is subjected to heat exchange with cold air from an ammonia separator through a cold exchanger 1, the hot gas is cooled to 24 ℃ below zero and is cooled to about 12 ℃ below zero through an ammonia cooler, the mixture is mixed with fresh make-up gas from methanation and then enters an ammonia liquid separator to separate liquid ammonia, the cold air after the liquid ammonia separation enters a cold exchanger 1 tube to exchange heat with hot gas outside the tube, the cold gas after the cold energy recovery enters a circulator to be pressurized, and the pressurized gas is repeated.
Liquid ammonia separated from the bottom of a cold exchanger 1 is conveyed to an ammonia ball tank 6 through a low-pressure liquid ammonia flash tank 5 to be stored, high-pressure gas is arranged at the upper part in the cold exchanger 1, liquid ammonia is arranged at the lower part, when the height of the liquid ammonia in the cold exchanger 1 is lower than a set value, a signal is input to a controller by a liquid level meter, the controller opens a stop valve 2 to work so as to cut off a pipeline, so as to avoid the high-pressure gas from entering the low-pressure liquid ammonia flash tank 5, when the height of the liquid ammonia is higher than the set value, the stop valve 2 is closed, an electric regulating valve is opened, the pressure entering the low-pressure liquid ammonia flash tank 5 is regulated by the electric regulating valve, and because the low-pressure liquid ammonia flash tank 5 is arranged between the cold exchanger 1 and the ammonia ball tank 6, the high pressure in the cold exchanger 1 is prevented from directly entering the ammonia ball tank 6, and the ammonia ball tank 6 is protected, because two electric regulating valves connected in parallel are arranged, when the gas flow in the cold exchanger 1 is smaller than a set value, the gas flowmeter 3 inputs signals to the controller, the controller controls one of the electric regulating valves to open and the other electric regulating valve to close, the two electric regulating valves achieve the purpose of one for one use, when the gas flow in the cold exchanger 1 is larger than the set value, the gas flowmeter 3 inputs signals to the controller, and the controller controls the two electric regulating valves to open simultaneously, so that the cold exchanger 1 conveys liquid ammonia through two pipelines, the working efficiency is improved, in the whole working process, manual ammonia discharging by an operator is not needed, the manpower is saved, the automation of equipment is improved, the safety accident problem caused by untimely ammonia discharging or excessive ammonia discharging amount is avoided, and the production safety is improved.
The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.
Claims (3)
1. An ammonia discharge device of an ammonia synthesis cold exchanger is characterized by comprising the cold exchanger, the bottom of the cold exchanger is connected with a low-pressure liquid ammonia flash tank through a pipeline, the liquid outlet end of the low-pressure liquid ammonia flash tank is connected with an ammonia ball tank, the exhaust end of the low-pressure liquid ammonia flash tank is connected with an ammonia washing device, follow on the pipeline cold exchanger extremely the direction of low pressure liquid ammonia flash tank has set gradually trip valve, gas flowmeter and electromagnetic control valve, electromagnetic control valve connects in parallel and is provided with two, be provided with the level gauge in the cold exchanger, the signal output part of level gauge has the controller through the wire connection, electromagnetic control valve, trip valve, gas flowmeter all with the controller electricity is connected.
2. The ammonia release device of an ammonia synthesis cold exchanger of claim 1, wherein the low-pressure liquid ammonia flash tank is a low-pressure liquid ammonia flash tank with a storage pressure of less than 5 MPa.
3. The ammonia discharge device of the ammonia synthesis cold exchanger as claimed in claim 1, wherein the cold exchanger comprises a heat exchanger disposed at the upper part and a separator disposed at the lower part, and the heat exchanger is a shell-and-tube heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120738578.2U CN218510692U (en) | 2021-04-13 | 2021-04-13 | Ammonia discharge device of ammonia synthesis cold exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120738578.2U CN218510692U (en) | 2021-04-13 | 2021-04-13 | Ammonia discharge device of ammonia synthesis cold exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218510692U true CN218510692U (en) | 2023-02-21 |
Family
ID=85206091
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120738578.2U Active CN218510692U (en) | 2021-04-13 | 2021-04-13 | Ammonia discharge device of ammonia synthesis cold exchanger |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218510692U (en) |
-
2021
- 2021-04-13 CN CN202120738578.2U patent/CN218510692U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN207112362U (en) | Avoid the nitrogen fertilizer plant high-pressure carbon dioxide blowdown system of line clogging | |
| CN103524299A (en) | Synthesized methanol and synthesized methane co-production method and equipment | |
| CN201473330U (en) | Production system for super-high purity aqueous ammonia | |
| CN218510692U (en) | Ammonia discharge device of ammonia synthesis cold exchanger | |
| CN101249953A (en) | Technique and equipment for manufacturing super-clean high-pure electronic grade hydrogen peroxide | |
| CN205973827U (en) | Gas system is produced to synthetic ammonia steam | |
| CN212374896U (en) | System for retrieve low temperature methyl alcohol washing air | |
| CN209835650U (en) | Hydrogen-ammonia membrane recovery system for synthetic ammonia vent gas | |
| CN217367187U (en) | Low-temperature shift gas washing system for producing methanol | |
| CN104496624A (en) | Method and device for producing high tower nitryl compound fertilizer | |
| CN203790929U (en) | System for gas-liquid reaction | |
| CN205533159U (en) | Energy -conserving synthetic ammonia natural gas compression system | |
| CN207112347U (en) | Synthesize ammonia liquid ammonia ball tank | |
| CN210584343U (en) | Exhaust gas purification device | |
| CN202744506U (en) | Methanol synthesis and methane synthesis co-production device | |
| CN208218420U (en) | A kind of ammonium hydroxide process units | |
| CN208684412U (en) | A kind of preparation facilities of phosphine gas | |
| CN111017956B (en) | System for recycling low-temperature methanol washing air and operation method | |
| CN218510678U (en) | Device for preventing liquid ammonia spherical tank superpressure | |
| CN209872642U (en) | Synthetic ammonia low transformation gas technology condensate purification treatment system | |
| CN209778703U (en) | Low-pressure methanol synthesis system | |
| CN217208953U (en) | Compressor and cache tank structure for improving running efficiency of hydrogen booster compressor | |
| CN101219945A (en) | Technique for producing sodium formate with semiwater gas | |
| CN219273022U (en) | Gas conveying device of sodium methoxide production system | |
| CN203947087U (en) | For improving the equipment of coal slurry concentration |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |