CN202785659U - System for controlling content of nitrogen dioxide - Google Patents
System for controlling content of nitrogen dioxide Download PDFInfo
- Publication number
- CN202785659U CN202785659U CN201220436986.3U CN201220436986U CN202785659U CN 202785659 U CN202785659 U CN 202785659U CN 201220436986 U CN201220436986 U CN 201220436986U CN 202785659 U CN202785659 U CN 202785659U
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- Prior art keywords
- gas cooler
- nitrogen
- acid
- valve
- nitric acid
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Abstract
The utility model discloses a system for controlling content of nitrogen dioxide. The system comprises a finished product acid tank and a gas cooler, wherein a valve is arranged on the gas cooler, a gas distributor is arranged in the finished product acid tank, an input end of the gas distributor is connected with a connector at an output end of the gas cooler, and the input end of the gas cooler is respectively connected with output ends of a compressed air main pipe and a nitrogen main pipe. According to the system for controlling the content of the nitrogen dioxide, the problem that the nitrogen dioxide decomposed from nitric acid because of high temperature exceeds the standard in the production of finished product nitric acid is effectively solved and controlled, so that the production requirements are met.
Description
Technical field
The utility model relates to the Controlling System in a kind of finished product nitric acid production technique, the specifically a kind of Controlling System that can control nitrogen peroxide content in the finished acid.
Background technology
Nitric acid is one of most important Chemicals, nitric acid industrial mainly with oxidation proceses of ammonia production, in order to make chemical fertilizer, explosive, nitrate etc.Pure nitric acid is colourless transparent liquid, and the industrial goods concentrated nitric acid shows brown because being dissolved with nitrogen peroxide.According to the requirement of GB/T 337.1-2002 industrial nitric acid, the concentrated nitric acid technical indicator is established 98 acid and two kinds of specifications of 97 acid, the massfraction of the nitrous acid that these two kinds of specifications are contained, and 98 acid are for being not more than 0.5%, 97 acid for being not more than 1.0%.Its desired value is for guaranteeing index, but in the device of existing production nitric acid, because bleaching not in producing, temperature is high or the various reasons such as diluted acid pollution, causes outbound finished product nitric acid nitrogen peroxide to exceed standard, and do not reach customer requirement.
The utility model content
The purpose of this utility model is to provide a kind of Controlling System that can control nitrogen peroxide content in the finished acid production.
The utility model has adopted following technical scheme: a kind of Controlling System of nitrogen peroxide content, this system comprises finished acid tank and gas cooler, described gas cooler is provided with valve, described finished acid tank is built-in with gas distributor, the input terminus of described gas distributor is connected with the output terminal interface of described gas cooler, and the input terminus of described gas cooler is connected output terminal with pneumatic manifold respectively and is connected with nitrogen header pipe; The external negative pressure device of described finished acid tank is equipped with valve on the pipe connecting between described each device.
Principle: air can be bleached nitric acid, makes nitrogen peroxide in the acid (nitric acid and nitrogen peroxide bonding force are weak) overflow HNO
3-NO
2==HNO
3+ 4NO
2, the nitrogen peroxide content that while nitric acid at high temperature decomposes is more, and next less at low temperature or normal temperature, concentrated nitric acid is at light and the lower decomposition reaction equation 4HNO that is heated
3==2H
2O+4NO
2+ O
2
Beneficial effect: the utility model is put into the finished acid tank with gas cooler with cooled gas, can bleach nitric acid, make nitrogen peroxide effusion in the acid, simultaneously can reduce and keep temperature in the finished acid tank, reduce the content that the finished product acid-respons generates nitrogen peroxide with this, control the nitrogen peroxide content in the finished acid tank, solved the problem of nitrogen peroxide content overproof.
Description of drawings
Fig. 1 is connection diagram of the present utility model.
Among the figure: 1, finished acid tank, 2, gas cooler, 3, gas distributor, 4.1, pneumatic manifold, 4.2, nitrogen header pipe, 5.1, valve a,
5.2, valve b, 5.3, valve c, 5.4, valve d, 5.5, valve e,
6, negative pressure device.
Embodiment
Be described in further detail below in conjunction with accompanying drawing:
As shown in Figure 1, this system comprises finished acid tank 1, gas cooler 2 and gas distributor 3, it is interior from bottom 20cm place that gas distributor 1 is built in finished acid tank 1, finished acid tank 1 an external negative pressure device 6, gas distributor 1 links to each other with pipeline with the output terminal of gas cooler 2, gas cooler 2 respectively with the linking to each other of pneumatic manifold 4.1 and nitrogen header pipe 4.2, pneumatic manifold 4.1 and nitrogen header pipe 4.2 are the output terminal of last operation, be respectively equipped with valve d5.4 and the valve e5.5 of control pneumatic manifold 4.1 and nitrogen header pipe 4.2 switches on the connection line of pneumatic manifold 4.1 and nitrogen header pipe 4.2 and gas cooler 2, gas cooler 2 bottom line are provided with valve a5.1, valve when system quits work shown in the figure all is in closing condition, when finished product nitric acid enters finished acid tank 1, opening valve d5.4 provides gas to cool off with pneumatic manifold 4.1 to gas cooler 2, when rainy day or wet weather, open valve e5.5 valve-off d5.4, provide nitrogen for its cooling for gas cooler 2 with nitrogen header pipe 4.2, pressurized air or nitrogen are opened valve a5.1 the water of condensation that produces are discharged from gas cooler 2 bottoms after cooling off by gas cooler 2.Be provided with valve b5.2 and valve c5.3 in the gas cooler 2, the temperature of gas cooler 2 cooling gases is controlled by valve b5.2 and valve c5.3, through air (from bottom 20cm place) intermediate gas sparger 3 that enters 1 end of finished acid tank of dehydration and cooling, gas distributor 3 NO in the drive nitric acid that evenly distributes
2Desorb, make in the acid nitrogen peroxide effusion emptying to negative pressure device 6, namely with air or nitrogen bleaching concentrated nitric acid, air or the nitrogen of cooling are lowered the temperature concentrated nitric acid simultaneously, better suppress the nitric acid decomposes, nitrogen peroxide content in the control finished acid tank 1, pipeline and gas distributor 3 materials of wherein entering the tank field are rafifinal, and are corrosion-resistant.
Claims (3)
1. the Controlling System of a nitrogen peroxide content, it is characterized in that: this system comprises finished acid tank and gas cooler, described finished acid tank is built-in with gas distributor, the output terminal of the gas cooler that described finished acid tank is outer is connected with the input terminus of described gas distributor, the input terminus of described gas cooler is connected with the output terminal of pneumatic manifold, the external negative pressure device of described finished acid tank.
2. the Controlling System of nitrogen peroxide content according to claim 1, it is characterized in that: the input terminus of described gas cooler also is connected with the output terminal of nitrogen header pipe.
3. the Controlling System of nitrogen peroxide content according to claim 1 and 2, it is characterized in that: described gas cooler is provided with valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220436986.3U CN202785659U (en) | 2012-08-30 | 2012-08-30 | System for controlling content of nitrogen dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220436986.3U CN202785659U (en) | 2012-08-30 | 2012-08-30 | System for controlling content of nitrogen dioxide |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202785659U true CN202785659U (en) | 2013-03-13 |
Family
ID=47812966
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220436986.3U Withdrawn - After Issue CN202785659U (en) | 2012-08-30 | 2012-08-30 | System for controlling content of nitrogen dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202785659U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826521A (en) * | 2012-08-30 | 2012-12-19 | 安徽淮化股份有限公司 | Control system of nitrogen dioxide content |
| CN104986743A (en) * | 2015-07-09 | 2015-10-21 | 安徽淮化股份有限公司 | Bleaching process and device used in nitric acid preparation process |
-
2012
- 2012-08-30 CN CN201220436986.3U patent/CN202785659U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102826521A (en) * | 2012-08-30 | 2012-12-19 | 安徽淮化股份有限公司 | Control system of nitrogen dioxide content |
| CN104986743A (en) * | 2015-07-09 | 2015-10-21 | 安徽淮化股份有限公司 | Bleaching process and device used in nitric acid preparation process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20140312 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20130313 Effective date of abandoning: 20140312 |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |