CN203365212U - On-line measuring device for dilution concentration of high-concentration ammonia gas - Google Patents
On-line measuring device for dilution concentration of high-concentration ammonia gas Download PDFInfo
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- CN203365212U CN203365212U CN 201320467713 CN201320467713U CN203365212U CN 203365212 U CN203365212 U CN 203365212U CN 201320467713 CN201320467713 CN 201320467713 CN 201320467713 U CN201320467713 U CN 201320467713U CN 203365212 U CN203365212 U CN 203365212U
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Abstract
The utility model provides an on-line measuring device for the dilution concentration of high-concentration ammonia gas. The device comprises a primary mixer, a secondary mixer, a dilution fan and an ammonia gas concentration measuring instrument, wherein ammonia gas inlets, air inlets and mixed gas outlets are formed in both the primary mixer and the secondary mixer; the air inlets of the primary mixer and the secondary mixer are connected with the dilution fan; the mixed gas outlet of the primary mixer is connected with the ammonia gas inlet of the secondary mixer; the ammonia gas concentration measuring instrument is connected with the mixed gas outlet of the secondary mixer; and electric tracer heating systems are arranged on the primary mixer and the secondary mixer. According to the on-line measuring device, the high-concentration ammonia gas is diluted in a two-stage air supply manner, so that the ammonia gas can be directly measured on line by the instrument, and local vapor cannot be condensed due to high concentration; and the on-line measuring device has the advantages that the device is real-time, safe, convenient and efficient.
Description
Technical field
The utility model belongs to the air pollution control technique field, be specifically related to a kind of high concentration ammonia dilute concentration on-line measurement device, make the measurement of ammonia concentration after the technological process urea seeding hydrolysis reaction of coal-fired power plant denitrating flue gas for the ammonia that utilizes urea seeding hydrolysis to generate.
Background technology
Denitrating flue gas, refer to the technology that contained objectionable impurities-NOX in the flue gas that (comprises coal-burning boiler, oil-burning gas-fired boiler and some industrial furnaces) after high-temp combustion is removed, comprise two kinds of major technique schools of SCR and SNCR, wherein SCR is the mainstream technology of denitrating flue gas.So-called SCR technology, refer between the economizer of boiler and air preheater the SCR reactor is set, catalyzer is installed in reactor, is sprayed into reductive agent (containing ammonia gas) in the flue cross section before reactor, reductive agent and NOx react and remove NOX on catalyst surface.
The reductive agent that the SCR denitrating flue gas is used is ammonia essentially, and a set of device that can the continuous production ammonia need to be set at the scene.From raw material, the ammonia preparation system can be divided into anhydrous liquid ammonia system, ammoniacal liquor system and urea system.Wherein use the system of liquefied ammonia Evaporation preparation ammonia the most commonly used, reason is that its investment is the most cheap, and transportation, use cost is also minimum, but there is great potential safety hazard in the liquefied ammonia system, particularly its transportation and storing process, the harm that A leak of liquefied ammonia brings is very large, and security incident is of common occurrence; The investment of ammoniacal liquor system, operation and transportation cost are all very high, more safe than liquefied ammonia, but still have certain potential safety hazard; The investment of urea system and the operating cost height of comparing with the liquefied ammonia system, but transportation cost is suitable, and urea system there is no potential safety hazard, is safest ammonia technology of preparing.
In order to analyze the degree of hydrolysis of urea reaction, need be measured the outlet ammonia concentration.Discharge the total amount of ammonia by analyzing whole hydrolysis reaction, and urea raw material consumption contrast, draw the utilization factor of urea in whole hydrolysis reaction.Because ammonia concentration is too high, it need to be diluted, after dilution, have two kinds of equipment available: infrared ammonia detects and electrochemical ammonia detects.Need to consider two key factors during calculating: water vapor dewpoint temperature and apparatus measures scope, infrared ammonia detector measurement range is 0-6% or 0-100%, electrochemical ammonia detector measurement range is 0-5000ppm, therefore when calculating, infrared equipment is mainly considered dewpoint temperature, and electrochemical apparatus is mainly considered measurement range.
Due to urea seeding hydrolysis outlet ammonia gas volume concentrations, in 37% left and right, ammonia concentration is too high, and electrochemical ammonia detector measurement range is 0-5000ppm, temperature 70 degree, can't directly measure, so need the ammonia of first diluting reaction still outlet, temperature and concentration be lowered and measured.And the vapour-set problem of partial water easily appears in existing high concentration ammonia On-line Measuring Method.
The utility model content
The utility model provides a kind of high concentration ammonia dilution measurement device, can realize the dilution of ammonia is mixed, and reduces ammonia concentration, makes it can be directly by the on-line measurement of ammonia concentration measurement instrument.
For achieving the above object, the technical solution adopted in the utility model is as follows:
A kind of high concentration ammonia dilution measurement device, comprise one-level mixer, secondary mixer, dilution air and ammonia concentration measurement instrument; One-level mixer and secondary mixer are equipped with ammonia import, air in and mixed gas outlet; The air in of one-level mixer and secondary mixer is connected with dilution air by pipeline, and the mixed gas outlet of one-level mixer is connected with the ammonia import of secondary mixer, and the ammonia concentration measurement instrument is connected with the mixed gas outlet of secondary mixer.
Further, the air in pipeline place of one-level mixer and secondary mixer is provided with electric tracer heating system.
Further, the electric tracer heating system of one-level mixer is by air heat to 100-120 ℃, and air quantity is the 15-20% of dilution wind, and the electric tracer heating system of secondary mixer is by air heat to 30-40 ℃, and air quantity is the 85-80% of dilution wind.Can guarantee like this when I and II wind mixes not there will be the partial water vapor concentration too high and condense.
Further, the ammonia import of described one-level mixer is connected with the escape pipe that utilizes the urea seeding hydrolysis to generate the oil heating reactor of ammonia.
Further, also comprise a device for absorbing tail gas, be connected with the mixed gas outlet of described secondary mixer by pipeline.
Further, the pipeline that connects the mixed gas outlet of described device for absorbing tail gas and described secondary mixer is provided with reverse checkvalve.
Further, described device for absorbing tail gas is the watery hydrochloric acid tourie.
Further, described dilution air is roots blower.
Further, the pipeline that connects described dilution air and described one-level mixer and described secondary mixer is provided with gas meter.
Further, on the pipeline that connects described dilution air and described one-level mixer and described secondary mixer, and the pipeline that connects the mixed gas outlet of described secondary mixer is provided with Cutoff ball valve.
The utility model employing two-stage air-supply dilution mode is diluted the ammonia of high concentration, force one wind is 100-120 ℃ of hot blast, air quantity is the 15-20% of dilution wind, light breeze is 30-40 ℃ of hot blast, and air quantity, for the 85-80% of dilution wind, mixes by the dilution to ammonia, can reduce ammonia concentration, make it can be directly by the instrument on-line measurement, and can guarantee that I and II wind not there will be the partial water vapor concentration too high and condense while mixing, have real-time, safe, convenient, effective advantage.
The accompanying drawing explanation
Fig. 1 is the high concentration ammonia dilution measurement device schematic diagram of the utility model embodiment.
Number in the figure explanation: 1-one-level mixer, 2-secondary mixer, 3-roots blower, 4-ammonia concentration measurement instrument, 5-gas meter, the 6-electric tracer heating system, 7-reverse checkvalve, 8-Cutoff ball valve, 9-device for absorbing tail gas, the A-reactor carrys out gas, B-tail gas C-outside atmosphere, D-waste liquid.
Embodiment
Below by specific embodiments and the drawings, the utility model is described in detail.
Fig. 1 is the high concentration ammonia dilution measurement device schematic diagram of the present embodiment, comprises that one-level mixer 1, secondary mixer 2, dilution air 3(the present embodiment adopt roots blower) and ammonia concentration measurement instrument 4(be the ammonia detector).One-level mixer 1 and secondary mixer 2 are equipped with ammonia import, air in and mixed gas outlet.The air in of one-level mixer and secondary mixer is connected with dilution air 3 by pipeline, on the pipeline connected, is provided with gas meter 5.The mixed gas outlet of one-level mixer is connected with the ammonia import of secondary mixer, and the air in pipeline of one-level mixer and secondary mixer is provided with electric tracer heating system 6.The ammonia import of one-level mixer is connected with the escape pipe (the output-response still carrys out gas A) of the oil heating reactor of the ammonia that utilizes the urea seeding hydrolysis to generate, and connecting tube is provided with reverse checkvalve 7.On the pipeline be connected with described secondary mixer with the one-level mixer at dilution air, and be provided with Cutoff ball valve 8 on the pipeline be connected with the mixed gas outlet of secondary mixer.This high concentration ammonia dilution measurement device also comprises a device for absorbing tail gas 9, by pipeline, with the mixed gas outlet of described secondary mixer, is connected, and on the pipeline connected, is provided with reverse checkvalve 7.The present embodiment adopts the watery hydrochloric acid tourie to absorb tail gas.
Said apparatus, by the dilution of ammonia is mixed, can reduce ammonia concentration, makes it can be directly by the instrument on-line measurement, and can guarantee that I and II wind not there will be the partial water vapor concentration too high and condense while mixing.
Above embodiment is only in order to the technical solution of the utility model to be described but not be limited; those of ordinary skill in the art can modify or be equal to replacement the technical solution of the utility model; and not breaking away from spirit and scope of the present utility model, protection domain of the present utility model should be as the criterion so that claim is described.
Claims (10)
1. a high concentration ammonia dilution measurement device, is characterized in that, comprises one-level mixer, secondary mixer, dilution air and ammonia concentration measurement instrument; One-level mixer and secondary mixer are equipped with ammonia import, air in and mixed gas outlet; The air in of one-level mixer and secondary mixer is connected with dilution air by pipeline, and the mixed gas outlet of one-level mixer is connected with the ammonia import of secondary mixer, and the ammonia concentration measurement instrument is connected with the mixed gas outlet of secondary mixer.
2. high concentration ammonia dilution measurement device as claimed in claim 1, it is characterized in that: the pipeline place of the air in of described one-level mixer and described secondary mixer is provided with electric tracer heating system.
3. high concentration ammonia dilution measurement device as claimed in claim 2 is characterized in that: the electric tracer heating system of described one-level mixer is by air heat to 100-120 ℃, and air quantity is the 15-20% of dilution wind; The electric tracer heating system of described secondary mixer is by air heat to 30-40 ℃, and air quantity is the 85-80% of dilution wind.
4. high concentration ammonia dilution measurement device as claimed in claim 1 or 2 is characterized in that: the ammonia import of described one-level mixer is connected with the escape pipe that utilizes the urea seeding hydrolysis to generate the oil heating reactor of ammonia.
5. high concentration ammonia dilution measurement device as claimed in claim 1 or 2, is characterized in that: also comprise a device for absorbing tail gas, be connected with the mixed gas outlet of described secondary mixer by pipeline.
6. high concentration ammonia dilution measurement device as claimed in claim 5, it is characterized in that: the pipeline that connects the mixed gas outlet of described device for absorbing tail gas and described secondary mixer is provided with reverse checkvalve.
7. high concentration ammonia dilution measurement device as claimed in claim 5, it is characterized in that: described device for absorbing tail gas is the watery hydrochloric acid tourie.
8. high concentration ammonia dilution measurement device as claimed in claim 1 or 2, it is characterized in that: described dilution air is roots blower.
9. high concentration ammonia dilution measurement device as claimed in claim 1 or 2, it is characterized in that: the pipeline that connects described dilution air and described one-level mixer and described secondary mixer is provided with gas meter.
10. high concentration ammonia dilution measurement device as claimed in claim 1 or 2, it is characterized in that: on the pipeline that connects described dilution air and described one-level mixer and described secondary mixer, and the pipeline that connects the mixed gas outlet of described secondary mixer is provided with Cutoff ball valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320467713 CN203365212U (en) | 2013-08-01 | 2013-08-01 | On-line measuring device for dilution concentration of high-concentration ammonia gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320467713 CN203365212U (en) | 2013-08-01 | 2013-08-01 | On-line measuring device for dilution concentration of high-concentration ammonia gas |
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| Publication Number | Publication Date |
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| CN203365212U true CN203365212U (en) | 2013-12-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320467713 Expired - Lifetime CN203365212U (en) | 2013-08-01 | 2013-08-01 | On-line measuring device for dilution concentration of high-concentration ammonia gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374610A (en) * | 2014-11-14 | 2015-02-25 | 华能国际电力股份有限公司 | Gas phase separation sampling system and sampling method of urea hydrolysis reactor |
| CN112781969A (en) * | 2019-11-06 | 2021-05-11 | 中国石油化工股份有限公司 | Gas dilution device and method for online monitoring |
| CN115032339A (en) * | 2022-05-31 | 2022-09-09 | 中国矿业大学 | High-concentration flue gas dilution measuring device and method |
-
2013
- 2013-08-01 CN CN 201320467713 patent/CN203365212U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104374610A (en) * | 2014-11-14 | 2015-02-25 | 华能国际电力股份有限公司 | Gas phase separation sampling system and sampling method of urea hydrolysis reactor |
| CN112781969A (en) * | 2019-11-06 | 2021-05-11 | 中国石油化工股份有限公司 | Gas dilution device and method for online monitoring |
| CN115032339A (en) * | 2022-05-31 | 2022-09-09 | 中国矿业大学 | High-concentration flue gas dilution measuring device and method |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee after: DATANG ENVIRONMENT INDUSTRY GROUP Co.,Ltd. Patentee after: China Datang Technologies & Engineering Co.,Ltd. Address before: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee before: DATANG TECHNOLOGY INDUSTRY GROUP CO.,LTD. Patentee before: China Datang Technologies & Engineering Co.,Ltd. Address after: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee after: DATANG TECHNOLOGY INDUSTRY GROUP CO.,LTD. Patentee after: China Datang Technologies & Engineering Co.,Ltd. Address before: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee before: DATANG TECHNOLOGY INDUSTRY Co.,Ltd. Patentee before: China Datang Technologies & Engineering Co.,Ltd. Address after: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee after: DATANG TECHNOLOGY INDUSTRY Co.,Ltd. Patentee after: China Datang Technologies & Engineering Co.,Ltd. Address before: 100097 Beijing Haidian District Zizhuyuan Road No. 120 Patentee before: CHINA DATANG GROUP ENVIRONMENT TECHNOLOGY CO.,LTD. Patentee before: China Datang Technologies & Engineering Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20131225 |
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| CX01 | Expiry of patent term |