CN202898028U - Feeding system of device for producing nitric acid by oxidizing ammonia - Google Patents
Feeding system of device for producing nitric acid by oxidizing ammonia Download PDFInfo
- Publication number
- CN202898028U CN202898028U CN 201220598928 CN201220598928U CN202898028U CN 202898028 U CN202898028 U CN 202898028U CN 201220598928 CN201220598928 CN 201220598928 CN 201220598928 U CN201220598928 U CN 201220598928U CN 202898028 U CN202898028 U CN 202898028U
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- ammonia
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- heat exchanger
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Abstract
The utility model relates to a feeding system of a device for producing nitric acid by oxidizing ammonia. The system comprises an air filter, a steam turbine, an air compressor, a tail gas turbine, an air heat exchanger, a gas-ammonia heat exchanger, an ammonia-air mixer and an element magnetic tube filter. The outlet of the air filter is connected with the steam turbine and the air compressor inlet of the tail gas turbine, the outlet of the air compressor is connected with a shell pass inlet of the air heat exchanger, the shell pass outlet of the air heat exchanger is connected with an inlet at the bottom of the ammonia-air mixer, the tube pass of the air heat exchanger is connected with a circulating water tube, the outlet of the air compressor is connected with the shell pass inlet of the gas-ammonia heat exchanger at the same time, the tube pass inlet of the gas-ammonia heat exchanger is connected with a gas-ammonia feed tube, the tube pass outlet of the gas-ammonia heat exchanger is connected with the inlet in the middle of the ammonia-air mixer, the outlet at the top of the ammonia-air mixer is connected with the inlet of the element magnetic tube filter, and the outlet of the element magnetic tube filter is connected with the top inlet of the reactor. According to the system, the yield is improved by 7%.
Description
Technical field
The utility model relates to the feed system that nitric acid plant is produced in a kind of ammonia oxidation.
Background technology
Production of Nitric Acid is the most widely method of modern Application, and the process of Production of Nitric Acid can be divided into three steps, that is: ammonia oxidation on catalyzer generates nitrogen protoxide, and oxidation of nitric oxide becomes nitrogen peroxide, and water absorbs into nitric acid.
Use air and ammonia generation oxidizing reaction to produce the device of nitric acid, air enters reactor and gas ammonia generation oxidizing reaction after compressing through air compressor, reacts to be thermopositive reaction.After air and ammonia fully mix by the empty mixing tank of ammonia, enter reactor, temperature of reactor is controlled at 850 ℃～870 ℃, and it is two to the influential condition of temperature of reactor, one is compressed-air actuated temperature, and one is that ammonia and air mix the temperature that (being the empty ratio of ammonia) rear liberated heat of reaction produces according to a certain percentage.If compressed air temperature is high, the ratio of ammonia and air must reduce, and will inevitably impact output, if can reduce within the specific limits compressed air temperature, improves the ratio of ammonia and air mixed, just can improve the output of nitric acid.
The utility model content
The purpose of this utility model provides the feed system that nitric acid plant is produced in a kind of ammonia oxidation, basis at former feed system increases an air heat exchanger, utilizes recirculated water that it is carried out heat exchange, reduces the air themperature that enters in the empty mixing tank of ammonia, increase the air feed amount, increase nitric acid output.
The feed system that nitric acid plant is produced in ammonia oxidation described in the utility model comprises: air filter, steam turbines, air compressor, tail gas turbine machine, air heat exchanger, gas ammonia interchanger, the empty mixing tank of ammonia, biscuit porcelain pipe strainer; The outlet of air filter is connected with the air compressor inlet that is connected with steam turbines, tail gas turbine machine; The air compressor outlet is connected with the shell side entrance of air heat exchanger, and the shell side outlet of air heat exchanger is connected with the entrance that the empty mixing tank of ammonia is positioned at the bottom, and the tube side of air heat exchanger is connected with circulating pipe; The air compressor outlet is connected with the shell side entrance of gas ammonia interchanger simultaneously, and the tube side entrance of gas ammonia interchanger is connected with the gas ammonia feed-pipe, and the tube side outlet of gas ammonia interchanger is connected with the entrance that is positioned at the empty mixing tank of ammonia middle part; The outlet that is positioned at the empty mixing tank of ammonia top is connected with the entrance of biscuit porcelain pipe strainer, and the outlet of biscuit porcelain pipe strainer is connected with the top entrance of reactor.
Air enters air compressor after filtering by air filter, and under the driving of steam turbines, air is collapsed into 0.485Mpa (absolute pressure) by air compressor, and temperature is divided into two road air at 255 ℃.
One road air is through after entering together the empty mixing tank of ammonia and fully mix after the air heat exchanger cooling and by the gas ammonia of the second tunnel preheating of air, purify for the last time through bique pipe strainer again, then enter reactor, under catalyst action, carry out catalytic oxidation, generate nitric oxide gas and enter the oxidation absorption tower.
The feed system of nitric acid plant is produced in ammonia oxidation described in the utility model, reduces air themperature by increasing air heat exchanger; Increase air feed amount increase nitric acid output by reducing air themperature; Made output increased about 7%.
Description of drawings
The feed system synoptic diagram of nitric acid plant is produced in the oxidation of Fig. 1 ammonia.
Wherein: 1 reactor, 2 biscuit porcelain pipe strainers, the empty mixing tank of 3 ammonia, 4 air heat exchangers, 5 gas ammonia interchanger, 6 tail gas turbine machines, 7 air compressor, 8 steam turbiness, 9 air filters.
Embodiment
The feed system that nitric acid plant is produced in ammonia oxidation described in the utility model comprises: air filter 9, steam turbines 8, air compressor 7, tail gas turbine machine 6, air heat exchanger 4, gas ammonia interchanger 5, the empty mixing tank 3 of ammonia, biscuit porcelain pipe strainer 2; The outlet of air filter is connected with the air compressor inlet that is connected with steam turbines, tail gas turbine machine; The air compressor outlet is connected with the shell side entrance of air heat exchanger, and the shell side outlet of air heat exchanger is connected with the entrance that the empty mixing tank of ammonia is positioned at the bottom, and the tube side of air heat exchanger is connected with circulating pipe; The air compressor outlet is connected with the shell side entrance of gas ammonia interchanger simultaneously, and the tube side entrance of gas ammonia interchanger is connected with the gas ammonia feed-pipe, and the tube side outlet of gas ammonia interchanger is connected with the entrance that is positioned at the empty mixing tank of ammonia middle part; The outlet that is positioned at the empty mixing tank of ammonia top is connected with the entrance of biscuit porcelain pipe strainer, and the outlet of biscuit porcelain pipe strainer is connected with the top entrance of reactor 1.
Claims (1)
1. the feed system of an ammonia oxidation production nitric acid plant comprises: air filter, steam turbines, air compressor, tail gas turbine machine, air heat exchanger, gas ammonia interchanger, the empty mixing tank of ammonia, biscuit porcelain pipe strainer; It is characterized in that: the outlet of air filter is connected with the air compressor inlet that is connected with steam turbines, tail gas turbine machine; The air compressor outlet is connected with the shell side entrance of air heat exchanger, and the shell side outlet of air heat exchanger is connected with the entrance that the empty mixing tank of ammonia is positioned at the bottom, and the tube side of air heat exchanger is connected with circulating pipe; The air compressor outlet is connected with the shell side entrance of gas ammonia interchanger simultaneously, and the tube side entrance of gas ammonia interchanger is connected with the gas ammonia feed-pipe, and the tube side outlet of gas ammonia interchanger is connected with the entrance that is positioned at the empty mixing tank of ammonia middle part; The outlet that is positioned at the empty mixing tank of ammonia top is connected with the entrance of biscuit porcelain pipe strainer, and the outlet of biscuit porcelain pipe strainer is connected with the top entrance of reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220598928 CN202898028U (en) | 2012-11-14 | 2012-11-14 | Feeding system of device for producing nitric acid by oxidizing ammonia |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220598928 CN202898028U (en) | 2012-11-14 | 2012-11-14 | Feeding system of device for producing nitric acid by oxidizing ammonia |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202898028U true CN202898028U (en) | 2013-04-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220598928 Expired - Fee Related CN202898028U (en) | 2012-11-14 | 2012-11-14 | Feeding system of device for producing nitric acid by oxidizing ammonia |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202898028U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496680A (en) * | 2013-10-10 | 2014-01-08 | 中国海洋石油总公司 | Preparation method of NOx gas with ultrahigh concentration and method for producing concentrated nitric acid by using NOx gas with ultrahigh concentration |
| CN105217585A (en) * | 2014-06-04 | 2016-01-06 | 贵州芭田生态工程有限公司 | Double pressurized method nitric acid production plant |
-
2012
- 2012-11-14 CN CN 201220598928 patent/CN202898028U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496680A (en) * | 2013-10-10 | 2014-01-08 | 中国海洋石油总公司 | Preparation method of NOx gas with ultrahigh concentration and method for producing concentrated nitric acid by using NOx gas with ultrahigh concentration |
| CN105217585A (en) * | 2014-06-04 | 2016-01-06 | 贵州芭田生态工程有限公司 | Double pressurized method nitric acid production plant |
| CN105217585B (en) * | 2014-06-04 | 2017-06-23 | 贵州芭田生态工程有限公司 | Double pressurized method nitric acid production plant |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130424 Termination date: 20211114 |