CN216946814U - Production line for accelerating thermal state start of synthetic ammonia urea - Google Patents
Production line for accelerating thermal state start of synthetic ammonia urea Download PDFInfo
- Publication number
- CN216946814U CN216946814U CN202220074295.7U CN202220074295U CN216946814U CN 216946814 U CN216946814 U CN 216946814U CN 202220074295 U CN202220074295 U CN 202220074295U CN 216946814 U CN216946814 U CN 216946814U
- Authority
- CN
- China
- Prior art keywords
- buffer tank
- urea
- ammonia
- outlet
- tank
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/141—Feedstock
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The utility model is used for accelerating the production line of the thermal state start of the synthetic ammonia urea, the outlet of a methanol washing device is sequentially connected with a molecular sieve device, a liquid nitrogen washing device, a circulating gas compressor and a synthetic ammonia device, and the outlet of the synthetic ammonia device is simultaneously communicated with a first buffer tank and a second buffer tank; an auxiliary outlet of the second buffer tank is connected into the liquid ammonia storage tank, an outlet of the liquid ammonia storage tank is simultaneously connected into the first buffer tank and the second buffer tank after passing through the delivery pump, and the first buffer tank is communicated with the second buffer tank; the main outlet of the second buffer tank is connected into the urea synthesis tower through a booster pump and a high-pressure pump; the other outlet of the methanol washing device passes through CO2The rear part of the compressor is connected into a urea synthetic tower,the outlet E of the urea synthesis tower is a urea finished product outlet. The device can realize non-intermittent connection in the starting process, and shortens the starting process of the urea synthesis tower.
Description
Technical Field
The utility model belongs to the technical field of chemical equipment, and relates to a production line for accelerating the thermal-state start of synthetic ammonia urea.
Background
At present, according to the normal start procedures and flows of the synthetic ammonia urea synthesis tower, after the synthetic ammonia device is successfully started to produce ammonia in large quantity, the urea synthesis tower can be used for introducing ammonia and feeding, carbon dioxide raw material gas produced in a purification working section is completely emptied for a long time, equipment and public engineering are high in idle consumption, the start-up waiting time of the urea synthesis tower is long, adverse effects are caused on the aspects of production and operation economy and environmental protection, and the device needs to be optimized.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a production line for accelerating the thermal state start-up of synthetic ammonia urea, and solves the problems of long start-up waiting time, resource waste and high start-up cost of a urea synthesis tower in the prior art.
The utility model adopts the technical scheme that the production line for accelerating the thermal state start of the synthetic ammonia urea comprises a methanol washing device and a liquid ammonia storage tank, wherein an outlet A of the methanol washing device is connected with a molecular sieve device, the molecular sieve device is connected with a circulating gas compressor through a liquid nitrogen washing device, the circulating gas compressor is connected with a synthetic ammonia device, and an outlet of the synthetic ammonia device is simultaneously communicated with a first buffer tank and a second buffer tank.
An auxiliary outlet of the second buffer tank is connected into the liquid ammonia storage tank, an outlet C of the liquid ammonia storage tank is simultaneously connected into the first buffer tank and the second buffer tank after passing through the delivery pump, and a communicating pipe is also arranged between the first buffer tank and the second buffer tank; and the main outlet of the second buffer tank is connected into the urea synthesis tower through a booster pump and a high-pressure pump.
The other outlet B of the methanol washing device is connected with CO2Compressor, CO2The outlet of the compressor is connected to the inlet of the urea synthesizing tower, and the outlet E of the urea synthesizing tower is a urea finished product output port.
The utility model relates to a production line for accelerating the thermal state start of synthetic ammonia urea, which also comprises:
the first buffer tank is a medium-pressure ammonia storage tank provided for the ammonia synthesis device.
The second buffer tank is an ammonia collecting tank which is provided for the synthetic ammonia device during the production operation.
A one-way valve K1 is arranged on a pipeline between the first buffer tank and the delivery pump, a one-way valve K2 is arranged on a pipeline between the second buffer tank and the delivery pump, and a one-way valve K3 is arranged on an unloading pipeline between the second buffer tank and a filling port F of the liquid ammonia tank truck.
The molecular sieve device is used for adsorbing H from a low-temperature methanol washing section2Medium and trace amounts of carbon dioxide, methanol and water.
The utility model has the advantages that the existing synthetic ammonia, urea synthetic tower and liquid ammonia storage tank are utilized, after the carbon dioxide in the methanol washing section is qualified, the low-pressure non-emptying feeding of the urea synthetic tower and the starting of the synthetic ammonia device are synchronously carried out, when the synthetic ammonia device produces ammonia in large quantity, the discharging and system adjustment of the urea synthetic tower are realized, the load is synchronously improved, the non-intermittent connection can be realized on the starting process, the starting process of the urea synthetic tower is shortened, the material loss is reduced, the production benefit is improved, the operation cost is reduced, and the industrial production application and reference are facilitated.
Drawings
FIG. 1 is a schematic view of the overall layout of the production line apparatus of the present invention.
In the figure, 1, a methanol washing device, 2, a molecular sieve device, 3, a liquid nitrogen washing device, 4, a circulating gas compressor, 5, an ammonia synthesis device, 6, a first buffer tank, 7, a second buffer tank, 8, a liquid ammonia storage tank, 9, a delivery pump, 10, a booster pump, 11, a high-pressure pump, 12, CO2A compressor, 13, a urea synthesis tower,
further, K1, K2, and K3 are all check valves.
Detailed Description
The utility model is described in detail below with reference to the drawings and the detailed description.
Referring to fig. 1, the utility model comprises a methanol washing device 1 and a liquid ammonia storage tank 8, wherein an inlet of the methanol washing device 1 is connected with a pipeline of an internal low-temperature methanol circulation system, an outlet A of the methanol washing device 1 is connected with a molecular sieve device 2, the molecular sieve device 2 is connected with a circulating gas compressor 4 through a liquid nitrogen washing device 3, and the circulating gas compressor 4 and a synthetic ammonia device5, the outlet of the ammonia synthesis device 5 is simultaneously communicated with a first buffer tank 6 and a second buffer tank 7; an auxiliary outlet of the second buffer tank 7 is connected into the liquid ammonia storage tank 8, an outlet C of the liquid ammonia storage tank 8 is simultaneously connected into the first buffer tank 6 and the second buffer tank 7 after passing through a delivery pump 9, and a communicating pipe is also arranged between the first buffer tank 6 and the second buffer tank 7; the main outlet of the second buffer tank 7 is connected into a urea synthesis tower 13 through a booster pump 10 and a high-pressure pump 11; the other outlet B of the methanol washing device 1 is connected with CO2Compressor 12, CO2The outlet of the compressor 12 is connected to the inlet D of the urea synthesizing tower 13, and the outlet E of the urea synthesizing tower 13 is used for outputting synthetic urine to continue producing urea finished products in the later section.
A one-way valve K1 is arranged on a pipeline between the first buffer tank 6 and the delivery pump 9, a one-way valve K2 is arranged on a pipeline between the second buffer tank 7 and the delivery pump 9, and a one-way valve K3 is arranged on an unloading pipeline between the second buffer tank 7 and a filling opening F of the liquid ammonia tank truck.
The methanol washing device 1, the molecular sieve device 2, the liquid nitrogen washing device 3, the circulating gas compressor 4, the ammonia synthesis device 5 and the urea synthesis tower 13 all adopt the existing equipment.
The molecular sieve device 2 has the function of adsorbing H from the low-temperature methanol washing section2Medium and trace amounts of carbon dioxide, methanol and water.
First buffer tank 6 (model V1904, volume 200 m)3) When the urea is normally opened, the liquid level of the second buffer tank 7 can be adjusted, namely when the ammonia yield is greater than the requirement of the urea, the one-way valve at the inlet of the first buffer tank 6 is automatically opened through a liquid level high signal of the second buffer tank 7, so that the liquid ammonia enters the first buffer tank 6. When the ammonia used by the urea is larger than the ammonia yield, the ammonia is sent to the second buffer tank 7 from the first buffer tank 6, so that the load change of the urea synthesis tower 13 and the ammonia synthesis device 5 is stabilized, and the long-term and stable production is facilitated. The pressure is controlled to be 1.05MPa-1.70MPa during normal operation.
Second buffer tank 7 (model V1902, volume 42 m)3) An ammonia collecting tank provided for the synthetic ammonia device 5 during the production operation, and the liquid ammonia is further decompressed, flashed and dissolved by the second buffer tank 7The qualified liquid ammonia is provided for the urea synthesis tower 13 by the hydrogen and the nitrogen in the urea synthesis tower. The control pressure during normal operation is 1.05MPa-1.70 MPa.
CO2The function of the compressor 12 is to provide CO only during the scrubbing process for purifying methanol2And performing impulse conversion and pressure boosting after the product is qualified.
The working process of the present invention is, as shown in FIG. 1, CO in methanol scrubbing apparatus 12After the analysis is qualified, the CO can be started2After the compressor 12 is flushed and boosted to 3MPa, the gas is guided to the urea synthesis tower 13 from the port B to the port D and the pressure is boosted to 3MPa (the process takes about 3.5 hours); meanwhile, the liquid ammonia of the liquid ammonia storage tank 8 is transferred to the first buffer tank 6 and the second buffer tank 7 by starting the delivery pump 9, precooling of the booster pump 10 and the high-pressure pump 11 is carried out (the process can be carried out in advance), after the two pumps are started in sequence, the urea synthesizing tower 13 is boosted to 3MPa, low-pressure non-emptying starting of the urea synthesizing tower 13 is carried out, when the pressure of the urea synthesizing tower 13 reaches 10MPa, discharging of finished products and operation adjustment of a rear system can be carried out after the urea synthesizing tower 13 generates liquid level, and after the ammonia synthesis device 5 normally produces ammonia, comprehensive recovery of the load of the urea synthesizing tower 13 is realized.
During the preliminary preparation, the check valve K1 is opened to fill the first buffer tank 6 with liquid in advance to compensate for the shortage of the ammonia amount after the second buffer tank 7 feeds ammonia into the urea. In the preparation process before the start of the urea synthesis tower 13, the one-way valve K2 is opened, and the liquid ammonia in the liquid ammonia storage tank 8 is directly sent to the second buffer tank 7 through the delivery pump 9 for the booster pump 10 and the high-pressure pump 11 to pre-cool equipment and pipelines in advance for the post system, or is directly sent to the second buffer tank 7 to send ammonia to the urea synthesis tower 13. When the storage of the liquid ammonia storage tank 8 is insufficient, the one-way valve K3 is opened, the liquid ammonia injected by the external liquid ammonia tank truck can be supplemented to the second buffer tank 7 through the unloading pipeline, or the liquid ammonia is sent to the liquid ammonia storage tank 8 through the second buffer tank 7 for standby, and meanwhile, the pipeline and equipment behind the second buffer tank 7 are precooled in advance.
According to the traditional mode, the normal start-up flow of the synthetic ammonia to the urea synthesis tower 13 is from an opening A to an opening D, after the purified methanol washing process gas is qualified, the molecular sieve precooling needs 4 hours, the liquid nitrogen washing process gas needs 2 hours, the gas guiding to the synthetic ammonia device 5 and the circulating gas compressor 4 normally need 2 hours, the ammonia discharging of the synthetic ammonia device 5 needs 2 hours, meanwhile, the high-pressure ring of the urea synthesis tower 13 is boosted to 10MPa, the feeding condition is met, and the whole process needs about 10 hours.
By using the device of the utility model, the gas of the high-pressure system of the urea synthesizing tower 13 is guided and pressurized to 3.0MPa, the urea synthesizing tower 13 is started at low pressure without emptying, the urea synthesizing tower 13 feeds ammonia, and the control amount is only 1/3 of the traditional feeding amount of ammonia fed under 40% load at the beginning. Compared with the traditional method that the pressure is increased to 10MPa, the high-pressure feeding-discharging time of the urea synthesizing tower 13 is saved by about 2.0 hours when the low-pressure non-emptying operation is carried out. After the urea synthesis tower 13 is fed, a large amount of CO can be discharged into the air in the purification section2The device is used for driving the device, and the emptying loss and the environmental noise are reduced.
By utilizing the device, the feeding mode and time of the urea synthesis tower 13 are advanced according to the liquid ammonia storage capacity in the liquid ammonia storage tank 8, the ammonia pouring work of the liquid ammonia storage tank 8 to the two buffer tanks and the cold pump and starting operation of the booster pump 10 and the high-pressure pump 11 are carried out through the delivery pump 9 before the feeding of the urea synthesis tower 13. The urea synthesis tower 13 needs 17t/h ammonia amount for low-pressure non-emptying start-up under 40% load, and CO in the methanol washing device 1 under the condition of 150-200 tons of liquid ammonia reserve2And after the urea synthesis tower 13 is qualified, starting and feeding of the urea synthesis tower 13 can be carried out without being limited by a time node for discharging a large amount of ammonia from the ammonia synthesis device 5, and if the ammonia storage amount of the system is limited, the starting and feeding node of the urea synthesis tower 13 is adjusted and arranged according to the ammonia consumption amount per hour.
In conclusion, in the process of driving the original synthetic ammonia methanol washing section for 10 hours, the device of the utility model has 10000 Nm/hour when the methanol washing section operates at 40% load3Qualified CO2Emptying process gas, namely accelerating the start-up process of the urea synthesis tower, removing the system pressure rise and preparation time before feeding of nearly 3.5 hours of the urea synthesis tower 13 after the low-pressure non-emptying start-up of the urea synthesis tower 13, and emptying CO2The process gas is used for production, the urea synthesis tower 13 is started by utilizing the device, and the whole starting progress of the urea synthesis tower 13 can be advanced for more than 6 hours.
Claims (5)
1. A production line for accelerating the thermal state start of synthetic ammonia urea is characterized in that: the device comprises a methanol washing device (1) and a liquid ammonia storage tank (8), wherein an outlet A of the methanol washing device (1) is connected with a molecular sieve device (2), the molecular sieve device (2) is connected with a circulating gas compressor (4) through a liquid nitrogen washing device (3), the circulating gas compressor (4) is connected with a synthetic ammonia device (5), and an outlet of the synthetic ammonia device (5) is simultaneously communicated with a first buffer tank (6) and a second buffer tank (7);
an auxiliary outlet of the second buffer tank (7) is connected into a liquid ammonia storage tank (8), an outlet C of the liquid ammonia storage tank (8) is connected into the first buffer tank (6) and the second buffer tank (7) through a delivery pump (9), and a communicating pipe is arranged between the first buffer tank (6) and the second buffer tank (7); the main outlet of the second buffer tank (7) is connected into a urea synthesis tower (13) through a booster pump (10) and a high-pressure pump (11);
the other outlet B of the methanol washing device (1) is connected with CO2Compressor (12), CO2The outlet of the compressor (12) is connected into the inlet of the urea synthesizing tower (13), and the outlet E of the urea synthesizing tower (13) is a urea finished product output port.
2. The production line for accelerating the thermal state start-up of urea for synthesis of ammonia according to claim 1, characterized in that: the first buffer tank (6) is a medium-pressure ammonia storage tank provided for the ammonia synthesis device (5).
3. The production line for accelerating the thermal state start-up of urea for synthesis of ammonia according to claim 1, characterized in that: the second buffer tank (7) is an ammonia collecting tank which is provided for the synthetic ammonia device (5) during the production operation.
4. The production line for accelerating the thermal state start-up of urea for synthesis of ammonia according to claim 1, characterized in that: a one-way valve K1 is arranged on a pipeline between the first buffer tank (6) and the delivery pump (9), a one-way valve K2 is arranged on a pipeline between the second buffer tank (7) and the delivery pump (9), and a one-way valve K3 is arranged on an unloading pipeline between the second buffer tank (7) and a filling port F of the liquid ammonia tank truck.
5. The production line for accelerating the thermal start-up of urea for synthesis ammonia according to claim 1, characterized in that: the molecular sieve device (2) is used for adsorbing H from the low-temperature methanol washing section2Medium and trace amounts of carbon dioxide, methanol and water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220074295.7U CN216946814U (en) | 2022-01-12 | 2022-01-12 | Production line for accelerating thermal state start of synthetic ammonia urea |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220074295.7U CN216946814U (en) | 2022-01-12 | 2022-01-12 | Production line for accelerating thermal state start of synthetic ammonia urea |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216946814U true CN216946814U (en) | 2022-07-12 |
Family
ID=82315869
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220074295.7U Active CN216946814U (en) | 2022-01-12 | 2022-01-12 | Production line for accelerating thermal state start of synthetic ammonia urea |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216946814U (en) |
-
2022
- 2022-01-12 CN CN202220074295.7U patent/CN216946814U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109185699B (en) | Hydrogenation method and system simultaneously suitable for filling pressure of 70MPa and 35MPa | |
| CN101418907B (en) | High-pressure hydrogen supply system for exterior hydrogen feeding hydrogenation stations | |
| CN113586948B (en) | Optimization control method for efficient hydrogenation of hydrogenation station | |
| CN112705132A (en) | Gas hydrate rapid and continuous generation and cake making device and method | |
| CN111545015A (en) | Intelligent start-stop pressure swing adsorption hydrogen production system and start-stop method thereof | |
| CN216946814U (en) | Production line for accelerating thermal state start of synthetic ammonia urea | |
| CN201031676Y (en) | Boiler flue gas pressurization absorption CO2 gaseous state pouring well oil production device | |
| CN116697272A (en) | Hydrogen production hydrogenation station in organic liquid station and control method thereof | |
| CN213643154U (en) | Low-temperature methanol washing medium-pressure flash evaporation device | |
| CN209835650U (en) | Hydrogen-ammonia membrane recovery system for synthetic ammonia vent gas | |
| CN202876637U (en) | Double-tower ammonia washing system for membrane separation treatment | |
| CN210012339U (en) | Pulverized coal pressure methanol gasification device CO2System for recovering and automatically adjusting purified gas | |
| CN104370700B (en) | The reclaiming system of thick alcohol solution gas and method in coke-oven gas methanol technics | |
| CN210065599U (en) | Methanol synthesis system and component for optimizing materials in driving process for methanol synthesis system | |
| CN216113353U (en) | Supply system of hydrogen production and hydrogenation integrated hydrogenation station | |
| CN201596467U (en) | Concentrated water reuse system for reverse osmosis unit | |
| CN2818463Y (en) | Ultra-filter pretreater of reverse osmosis water purifier | |
| CN216296265U (en) | Methanol synthesis loop | |
| CN214892166U (en) | Device for maintaining operation of synthetic ammonia system during jumping of air separation system | |
| CN214032106U (en) | Gasification section grey water treatment device for porous ammonium nitrate production | |
| CN1223511C (en) | Novel process for producing calcium nitrite | |
| CN211998827U (en) | Vehicle-mounted membrane separation high-pressure nitrogen making device | |
| CN117861598A (en) | Continuous depressurization decomposing device for hydrate slurry and hydrate slurry reaction system | |
| CN220726506U (en) | Two-stage compression drainage balance system | |
| CN221570237U (en) | Liquid argon storage tank evaporation gas recycling and back filling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |