CN201959720U - Ammonia making reactor for flue gas denitrification and nitrogen urea solution hydrolyzation - Google Patents
Ammonia making reactor for flue gas denitrification and nitrogen urea solution hydrolyzation Download PDFInfo
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- CN201959720U CN201959720U CN2011200387321U CN201120038732U CN201959720U CN 201959720 U CN201959720 U CN 201959720U CN 2011200387321 U CN2011200387321 U CN 2011200387321U CN 201120038732 U CN201120038732 U CN 201120038732U CN 201959720 U CN201959720 U CN 201959720U
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Abstract
The utility model discloses an ammonia making reactor for flue gas denitrification and nitrogen urea solution hydrolyzation. The ammonia making reactor for the flue gas denitrification and the nitrogen urea solution hydrolyzation is a vertical columnar structure and comprises an upper product mixing air outlet region (1), a middle gas-liquid separating region (2) and a lower hydrolyzing reacting region (3) that are connected and fixed in sequence from the top to bottom. In the reactor, the vertical columnar structure is adopted, the structure is capable of effectively reducing the escaping degree of amine in the denitration process; when the quantity demanded of the amine is reduced, the reaction degree can be reduced in time to respond the change of the load of a gas denitration (nitrogen) device in time by reducing the feeding flow of urea solution or changing the total amount of the urea solution in the reactor so that the escaping degree of the amine is reduced; when the device is stopped, the production of gas can be quickly stopped; as the liquid storage amount in the vertical reactor is little, the heat energy is stopped to supply when no gas is required, and the temperature in the device is reduced in time; therefore, the escape of the amine is restrained, and the safety of the following gas denitration (nitrogen) device is enhanced.
Description
Technical field
The utility model belongs to denitrating flue gas (nitrogen) field, specifically, relates to a kind of fossil feedstock denitration of boiler smoke, nitrogen urea liquid hydrolysis system ammonia reactor.
Background technology
At present, the measure of control fossil feedstock boiler NOx discharging divides two big classes.One class is that the improvement (comprise adopt advanced low-NOx combustor) by combustion technology reduces the NOx discharge capacity, another kind of be boiler tail install additional remove the nitrogen oxide device promptly-denitrating flue gas (nitrogen) device.Along with the strictness control of country to the NOx emission control standard, therefore the former can not satisfy emission request, and installing denitrating flue gas (nitrogen) additional at boiler tail, install-promptly to adopt selective catalytic reduction (being SCR) to remove NOx in the flue gas be the peak of industry from now on.
Selective catalytic reduction is meant under the effect of catalyst, with NH
3Be reducing agent, with the nitrogen oxide (NO in the flue gas
X) nontoxic, the free of contamination N of reaction generation
2And H
2O.Industrially can produce denitration (nitrogen) reducing agent NH
3Material three kinds in liquefied ammonia, ammoniacal liquor and urea is arranged.
Anhydrous ammonia has another name called liquefied ammonia.Liquefied ammonia leaks in the air, forms cloud with airborne water, is difficult for diffusion, and near people life safety is worked the mischief.The explosion limit of ammonia steam and air mixture is 15.7% ~ 27.4%, and ammonia and air mixture reach above-mentioned concentration range and naked light can burn and explode, and exists if any oils and other inflammable substances, and then danger is higher.Ammoniacal liquor also belongs to dangerous material, and the ammonia concn that is used for denitration (nitrogen) is generally 20% ~ 29%, and ammoniacal liquor is comparatively safe than liquefied ammonia, has explosion danger too but airborne ammonia reaches above-mentioned explosion limit.Therefore liquefied ammonia and ammoniacal liquor have strict provisions of laws and regulations in country aspect storage, transportation and the use.
With respect to liquefied ammonia and ammoniacal liquor, urea is nontoxic, harmless chemicals, is convenient to transportation and storage, available train or automobile transportation, and transportation and storage process do not need special safety measure.Urea liquid causes danger as the raw material of producing denitration (nitrogen) reducing agent in the time of can avoiding leaking in storage, conveying and use.Therefore, more and more using fossil-fuel boiler enterprise wishes to adopt urea liquid as denitration (nitrogen) reducing agent.
The utility model content
Technical problem to be solved in the utility model provides a kind of denitrating flue gas, nitrogen urea liquid hydrolysis system ammonia reactor, and this reacts facility, can be under the effect of thermal source with aqueous solution of urea, and the quick a large amount of cleaning flue gases denitrations of output (nitrogen) reducing agent; And can need the variation of reduction dosage and rapid adjustment amonia yield (minimizing the escaping of ammonia) along with denitrating flue gas (nitrogen) device.
The technical scheme in the invention for solving the above technical problem is:
Denitrating flue gas, nitrogen urea liquid hydrolysis system ammonia reactor, described reactor is a vertical type cylinder type structure, comprises by last upper product mixed gas outlet district, middle part gas-liquid separation zone, the bottom hydrolysis reaction zone that is connected and fixed at least successively constituting.
Urea is produced denitration (nitrogen) reducing agent, two kinds of methods is arranged usually: pyrolysis and hydrolysis.Pyrolysismethod is that the urea liquid after the direct Fast Heating atomizing decomposes, and decomposes not exclusively but pyrolysismethod is frequent, influences the efficient of denitrating flue gas (nitrogen).Hydrolyze method is in the certain reaction facility, and aqueous solution of urea is decomposed under the effect of thermal source, and to produce denitrating flue gas (nitrogen) reducing agent, this facility is denitrating flue gas (nitrogen) urea liquid hydrolysis system ammonia reactor.The utility model adopts vertical type cylinder type structure.Vertical type cylinder type structure can effectively reduce the degree of the escaping of ammonia in the denitrification process: when the ammonia demand reduces, can be in time by feed rate that reduces urea liquid or the total amount that changes urea liquid in the reaction facility, thereby reduce the degree of reaction, the variation of response denitrating flue gas (nitrogen) device load in time, thereby the escapement ratio of reduction ammonia.The utility model adopts vertical type cylinder type structure, when facility stops, can stop the production of product gas fast.Because the storage liquid measure is few in the vertical reactor, when not needing product gas, stops the heat energy supply, temperature can lower timely in the facility.Thereby suppress the escape of ammonia, increase the security of follow-up denitrating flue gas (nitrogen) device.
Described upper product mixed gas outlet district is made up of fixedly connected product mixed gas outlet and product gas reheater, and product gas reheater and middle part gas-liquid separation zone are connected and fixed.The utility model facility designs product gas reheat machine before product gas outlet.This design is a purpose with the degree of superheat that guarantees product gas, prevents that product gas from back reaction taking place when condensation, and reduces the purity and the concentration of product gas.
Described middle part gas-liquid separation zone is made up of Disengagement zone outer cylinder body and the demister that is fixed in the outer cylinder body of Disengagement zone.The utility model design has demister, makes product gas not be with drop, guarantees the cleaning of product gas.
Described bottom hydrolysis reaction zone comprises the reaction zone outer cylinder body, places the heater in the reaction zone outer cylinder body, and the reaction zone outer cylinder body is provided with urea liquid feed arrangement, urea reaction raffinate discharging opening, bottom blow-down mouth, sight glass, manhole and external liquid level gauge.The utility model is provided with heater in hydrolysis reaction zone.Because need absorb a large amount of heats during the aqueous solution of urea hydrolysis, this utility model can satisfy this requirement at the heater of hydrolysis reaction zone; Heater guarantees that urea liquid fully contacts with thermal source when design, and it is fast to conduct heat, thereby can produce product gas fast, shortens the response time.
Described middle part gas-liquid separation zone is connected with the interval inverted pyramidal structures that adopts of bottom hydrolysis.
Described inverted pyramidal structures and reaction zone outer cylinder body are integrative-structure.
The beneficial effects of the utility model are:
1, the utility model adopts vertical type cylinder type structure, this structure can effectively reduce the degree of the escaping of ammonia in the denitrification process: when the ammonia demand reduces, can be in time by feed rate that reduces urea liquid or the total amount that changes urea liquid in the reaction facility, thereby reduce the degree of reaction, the variation of response denitrating flue gas (nitrogen) device load in time, thereby the escapement ratio of reduction ammonia.
2, the utility model adopts vertical type cylinder type structure, when facility stops, can stop the production of product gas fast.Because the storage liquid measure is few in the vertical reactor, when not needing product gas, stops the heat energy supply, temperature can lower timely in the facility.Thereby suppress the escape of ammonia, increase the security of follow-up denitrating flue gas (nitrogen) device.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
Referring to shown in Figure 1, present embodiment as shown in the figure, present embodiment is a vertical type cylinder type structure, includes upper product mixed gas outlet district 1, middle part gas-liquid separation zone 2, bottom hydrolysis reaction zone 3 three parts and forms.Middle part gas-liquid separation zone 2 adopts an inverted pyramidal structures 4 to be connected with 3 of bottom hydrolysis reaction zones, inverted pyramidal structures 4 adopts flange to be connected with middle part gas-liquid separation zone 2, inverted pyramidal structures 4 relies on bottom hydrolysis reaction zone 3 and is welded into a whole, be convenient to moulding, middle part gas-liquid separation zone 2 adopts flange to be connected with product mixed gas outlet district 1.Form by product mixed gas outlet 11 and product gas reheater 12 in upper product mixed gas outlet district; Middle part gas-liquid separation zone 2 is made up of Disengagement zone outer cylinder body 21 and demister 22; Bottom hydrolysis reaction zone 3 is made up of reaction zone outer cylinder body 31, heater 32, urea liquid feed arrangement 33, urea reaction raffinate discharging opening 34, bottom blow-down mouth 35, sight glass 36, manhole 37 and external liquid level gauge 38.Whole facility is provided with three supporting legs, is shelved on ground.
As mentioned above, just can realize the utility model preferably.
Claims (6)
1. denitrating flue gas, nitrogen are with urea liquid hydrolysis system ammonia reactor, it is characterized in that, described denitrating flue gas, nitrogen are vertical type cylinder type structure with urea liquid hydrolysis system ammonia reactor, comprise by the last upper product mixed gas outlet district (1) that is connected and fixed at least successively, middle part gas-liquid separation zone (2), bottom hydrolysis reaction zone (3) constituting.
2. denitrating flue gas according to claim 1, nitrogen urea liquid hydrolysis system ammonia reactor, it is characterized in that, described upper product mixed gas outlet district (1) is made up of fixedly connected product mixed gas outlet (11) and product gas reheater (12), and product gas reheater (12) is connected and fixed with middle part gas-liquid separation zone (2).
3. denitrating flue gas according to claim 1, nitrogen urea liquid hydrolysis system ammonia reactor, it is characterized in that described middle part gas-liquid separation zone (2) is made up of Disengagement zone outer cylinder body (21) and the demister (22) that is fixed in the Disengagement zone outer cylinder body (21).
4. denitrating flue gas according to claim 1, nitrogen urea liquid hydrolysis system ammonia reactor, it is characterized in that, described bottom hydrolysis reaction zone (3) comprises reaction zone outer cylinder body (31), places the heater (32) in the reaction zone outer cylinder body (31), and reaction zone outer cylinder body (31) is provided with urea liquid feed arrangement (33), urea reaction raffinate discharging opening (34), bottom blow-down mouth (35), sight glass (36), manhole (37) and external liquid level gauge (38).
5. denitrating flue gas according to claim 1, nitrogen is characterized in that with urea liquid hydrolysis system ammonia reactor, and employing one inverted pyramidal structures (4) is connected between described middle part gas-liquid separation zone (2) and bottom hydrolysis reaction zone (3).
6. denitrating flue gas according to claim 1, nitrogen is characterized in that with urea liquid hydrolysis system ammonia reactor described inverted pyramidal structures (4) is integrative-structure with reaction zone outer cylinder body (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200387321U CN201959720U (en) | 2011-02-15 | 2011-02-15 | Ammonia making reactor for flue gas denitrification and nitrogen urea solution hydrolyzation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200387321U CN201959720U (en) | 2011-02-15 | 2011-02-15 | Ammonia making reactor for flue gas denitrification and nitrogen urea solution hydrolyzation |
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| Publication Number | Publication Date |
|---|---|
| CN201959720U true CN201959720U (en) | 2011-09-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200387321U Expired - Lifetime CN201959720U (en) | 2011-02-15 | 2011-02-15 | Ammonia making reactor for flue gas denitrification and nitrogen urea solution hydrolyzation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016374A (en) * | 2014-04-29 | 2014-09-03 | 大唐科技产业集团有限公司 | Novel urea pyrolysis furnace for denitrifying flue gas |
| CN104909386A (en) * | 2015-05-25 | 2015-09-16 | 成都锐思环保技术股份有限公司 | Urea hydrolysis ammonia-production equipment and method |
| CN111963283A (en) * | 2020-08-11 | 2020-11-20 | 航天环境工程有限公司 | Novel urea hydrolysis system with product gas treatment device and application |
-
2011
- 2011-02-15 CN CN2011200387321U patent/CN201959720U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104016374A (en) * | 2014-04-29 | 2014-09-03 | 大唐科技产业集团有限公司 | Novel urea pyrolysis furnace for denitrifying flue gas |
| CN104909386A (en) * | 2015-05-25 | 2015-09-16 | 成都锐思环保技术股份有限公司 | Urea hydrolysis ammonia-production equipment and method |
| CN111963283A (en) * | 2020-08-11 | 2020-11-20 | 航天环境工程有限公司 | Novel urea hydrolysis system with product gas treatment device and application |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20110907 |