CN202284148U - Environment-friendly ammonium oxidation reactor - Google Patents
Environment-friendly ammonium oxidation reactor Download PDFInfo
- Publication number
- CN202284148U CN202284148U CN2011203721193U CN201120372119U CN202284148U CN 202284148 U CN202284148 U CN 202284148U CN 2011203721193 U CN2011203721193 U CN 2011203721193U CN 201120372119 U CN201120372119 U CN 201120372119U CN 202284148 U CN202284148 U CN 202284148U
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- catalytic bed
- housing
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- oxidation reactor
- casing
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- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The utility model discloses an environment-friendly ammonium oxidation reactor, which comprises an upper casing, a lower casing, a hydrogen inlet and an ammonia and air mixed gas inlet and a reaction gas outlet arranged at the bottom of a casing, wherein the upper casing and the lower casing are connected through a pair of bearings, and the hydrogen inlet and the ammonia and air mixed gas inlet are arranged at the top of the casing. The hydrogen inlet is connected with the upper end of a rotating igniter, and the lower end of the rotating igniter is inserted in the casing to be connected with a platinum net catalytic bed. A distributor is arranged above the platinum net catalytic bed in the casing, a reaction heat recovery section is arranged below the platinum net catalytic bed in the casing, and an N20 catalytic bed arranged in the casing through a supporting component is arranged between the platinum net catalytic bed and the reaction heat recovery section. By adding the N20 catalytic bed under the platinum net catalytic bed, the environment-friendly ammonium oxidation reactor effectively enables generated N20 passing through the platinum net catalytic bed to be dropped from 1500ppm to 50-100ppm, and reduces emission of high equivalent greenhouse gas. The reaction heat recovery section is simple and reasonable in structural design and has no central tubes and metal boxes, and capacity utilization rate of the reactor is high.
Description
Technical field
The utility model relates to chemical technology field, particularly a kind of environment-friendly type ammonia oxidation reactor that utilizes oxidation proceses of ammonia to make rare nitric acid.
Background technology
At present, 900 ton per days that China introduces and the oxidizer of 500 ton per days are made up of catalytic bed and recovery of heat (waste heat boiler) two portions, and mainly there is following problem in these oxidizers:
1, in aforesaid device, platinum-rhodium net catalytic bed is only arranged, the N of reaction gas
2About the common 1500ppm of O, N
2The emission concentration of O is high, and N
2O is a greenhouse gases, and the superficial heat effect of unit mass is CO
2310 times, be one of project of the main concern of CDM in the world.
2, mainly contain two kinds of structures for heat recovery section, wherein a kind of waste heat boiler is the multi-layer helical coil pipe of band central canal, complex structure, and the space availability ratio of reactor drum is low, and needs to adopt two pairs of big flanges; And another kind of waste heat boiler adopts vertical coiled pipe rectangle structure, need establish metal box and filler metal filler on every side, and the steam superheating section is placed on the high-temperature zone of catalyst outlet, and pipe surface temperature is high, and thermal expansion is big, and domestic have a distress.
3, the gas distributor that adopts on the present catalytic bed all adopts the structure of introducing, and all has the problem of intellecture property during use.
The utility model content
The goal of the invention of the utility model is: to the problem of above-mentioned existence, a kind of oxidation efficiency height is provided, can significantly reduces N
2The environment-friendly type ammonia oxidation reactor of O quantity discharged.
The technical scheme of the utility model is achieved in that a kind of environment-friendly type ammonia oxidation reactor; The reaction gas outlet that comprises housing, is arranged on hydrogen inlet and the ammonia and the import of Air mixing gas of case top and is arranged on housing bottom; Said hydrogen inlet is connected with turning point firearm upper end; Said turning point firearm lower end is inserted in the housing and is connected with the platinum guaze catalytic bed; In said housing, above the platinum guaze catalytic bed, be provided with sparger, in said housing, below the platinum guaze catalytic bed, be provided with the reaction heat recovery zone, it is characterized in that: in said platinum guaze catalytic bed and answer and be provided with the N that places enclosure interior through support unit between the heat-recovery section
20 catalytic bed.
The described environment-friendly type ammonia oxidation reactor of the utility model; Protection section, steam superheating section and evaporator section that its said reaction heat recovery zone is included in the housing and from top to bottom arranges successively, is made up of corresponding coil pipe respectively; The entrance end of the coil pipe of protection section is communicated with water inlet; Its exit end is communicated with the carbonated drink outlet, and the entrance end of the coil pipe of steam superheating section is communicated with steam inlet, and its exit end is communicated with the superheated vapour outlet; The entrance end of the coil pipe of evaporator section is communicated with water inlet, and its exit end is communicated with the carbonated drink outlet.
The described environment-friendly type ammonia oxidation reactor of the utility model, the coil pipe of its said protection section, steam superheating section and evaporator section is the S type structure of symmetric offset spread.
The described environment-friendly type ammonia oxidation reactor of the utility model, it is said to be used to support N
2The support unit of 0 catalytic bed is a circular arc band steel supporting grating.
The described environment-friendly type ammonia oxidation reactor of the utility model, its said housing divide for the two portions up and down that connected by flange to form in platinum guaze catalytic bed corresponding position.
The described environment-friendly type ammonia oxidation reactor of the utility model, its said sparger are served as reasons and are gone up the bilayer structure of grid distributor and following grid distributor composition, and said upward grid distributor is the grid orifice plate, and following grid distributor is a porous plate.
The described environment-friendly type ammonia oxidation reactor of the utility model, it partly is provided with water wall in said inner walls, reaction heat recovery zone corresponding shell.
The utility model is through setting up N below the platinum guaze catalytic bed
20 catalytic bed can effectively make the N that produces through after the platinum guaze catalytic bed
20 drops to 50～100ppm from 1500ppm, significantly reduces the high equivalent weight greenhouse gas emission, answers the structure design of heat-recovery section simple more, rationally, does not have central canal also not have metal box, and the reactor volume utilization ratio is high.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation of coil pipe in the utility model.
Mark among the figure: 1 is housing, and 2 is hydrogen inlet, and 3 is ammonia and the import of Air mixing gas, and 4 are the reaction gas outlet, and 5 is the turning point firearm, and 6 is the platinum guaze catalytic bed, and 7 is sparger, and 8 is N
20 catalytic bed, 9 coil pipes for the protection section, 10 is water inlet, and 11 are the carbonated drink outlet, and 12 is the coil pipe of steam superheating section, and 13 is steam inlet, and 14 are the superheated vapour outlet, and 15 is the coil pipe of evaporator section, and 16 is flange, and 17 is water wall, and 18 is lighting-up tuyere.
Embodiment
Below in conjunction with accompanying drawing, the utility model is done detailed explanation.
For the purpose, technical scheme and the advantage that make the utility model is clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
As shown in Figure 1; A kind of environment-friendly type ammonia oxidation reactor; The reaction gas outlet 4 that comprises housing 1, is arranged on hydrogen inlet 2 and the ammonia and the Air mixing gas import 3 at housing 1 top and is arranged on housing 1 bottom; Said hydrogen inlet 2 is connected with turning point firearm 5 upper ends, and said turning point firearm 5 lower ends are inserted in the housing 1 and are connected with platinum guaze catalytic bed 6, between said platinum guaze catalytic bed and inner walls, are provided with lighting-up tuyere 18; In said housing 1, above the platinum guaze catalytic bed 6, be provided with sparger 7; Said sparger 7 is served as reasons and is gone up the bilayer structure of grid distributor and following grid distributor composition, and said upward grid distributor is the grid orifice plate, and following grid distributor is a porous plate; Adopt the gas distributor of quadratic distribution, gas distribution is even; In said housing 1, below the platinum guaze catalytic bed 6, be provided with the reaction heat recovery zone; Protection section, steam superheating section and evaporator section that said reaction heat recovery zone is included in the housing 1 and from top to bottom arranges successively, is made up of corresponding coil pipe respectively; The entrance end of the coil pipe 9 of protection section is communicated with water inlet 10, and its exit end is communicated with carbonated drink outlet 11, and the entrance end of the coil pipe 12 of steam superheating section is communicated with steam inlet 13; Its exit end is communicated with superheated vapour outlet 14; The entrance end of the coil pipe 15 of evaporator section is communicated with water inlet 10, and its exit end is communicated with carbonated drink outlet 11, and is as shown in Figure 2; The coil pipe of said protection section, steam superheating section and evaporator section is the S type structure of symmetric offset spread, and it can set the number of plies according to the heat transfer area needs.
Wherein, between said platinum guaze catalytic bed 6 and reaction heat recovery zone, be provided with the N that places housing 1 inside through support unit
20 catalytic bed 8 saidly is used to support N
2The support unit of 0 catalytic bed 8 is a circular arc band steel supporting grating; Said housing 1 divides for the two portions up and down that connected by flange 16 to form in platinum guaze catalytic bed 6 corresponding positions, be provided with water wall 17 at said housing 1 inwall, reaction heat recovery zone obverse.
The oxidizer that with the scale is 1200 tons of nitric acid of daily output is an example, and housing epimere internal diameter is Φ 6000mm, and the hypomere internal diameter is Φ 5000mm, working pressure 3.5～5MPa, 860～880 ℃ of platinum guaze temperature.Ammonia and air get into from reaction gas inlet, and through double-deck gas distributor uniform distribution and through the high temperature platinum guaze, ammonia and air generate NO under platinum catalyst, and temperature of reaction is 860～870 ℃, and the N that generates
20 is passing through N
2Reduce to 50～100ppm during 0 catalytic bed, the coil pipe through the overprotection section reclaims heat then, and behind the coil pipe recovery heat through the superheated vapour section, the coil pipe that gets into evaporator section again reclaims reaction heat, after the reactor outlet outflow again.
The stove water that drum comes gets into from water inlet, gets into evaporator section coil pipe and protection section coil pipe respectively, and behind the recovery heat, vapour and water are from carbonated drink outlet back-steam bag; The saturation steam that drum produces gets into the coil pipe of steam superheating section from steam inlet, through being flowed out by the superheated vapour outlet after the heat exchange.
Wherein, apparatus casing is the stainless steel vessel of low pressure, and coil pipe is a seamless steel tube for boiler, makes simple.
The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection domain of the utility model.
Claims (7)
1. environment-friendly type ammonia oxidation reactor; The reaction gas outlet (4) that comprises housing (1), is arranged on hydrogen inlet (2) and the ammonia and the Air mixing gas import (3) at housing (1) top and is arranged on housing (1) bottom; Said hydrogen inlet (2) is connected with turning point firearm (5) upper end; Said turning point firearm (5) lower end is inserted in the housing (1) and is connected with platinum guaze catalytic bed (6); In said housing (1), platinum guaze catalytic bed (6) top is provided with sparger (7); In said housing (1), platinum guaze catalytic bed (6) below is provided with the reaction heat recovery zone, it is characterized in that: between said platinum guaze catalytic bed (6) and reaction heat recovery zone, be provided with the N that places housing (1) inside through support unit
20 catalytic bed (8).
2. environment-friendly type ammonia oxidation reactor according to claim 1; It is characterized in that: protection section, steam superheating section and evaporator section that said reaction heat recovery zone is included in the housing (1) and from top to bottom arranges successively, is made up of corresponding coil pipe respectively; The entrance end of the coil pipe (9) of protection section is communicated with water inlet (10); Its exit end is communicated with carbonated drink outlet (11), and the entrance end of the coil pipe of steam superheating section (12) is communicated with steam inlet (13), and its exit end is communicated with superheated vapour outlet (14); The entrance end of the coil pipe of evaporator section (15) is communicated with water inlet (10), and its exit end is communicated with carbonated drink outlet (11).
3. environment-friendly type ammonia oxidation reactor according to claim 2 is characterized in that: the coil pipe of said protection section, steam superheating section and evaporator section is the S type structure of symmetric offset spread.
4. environment-friendly type ammonia oxidation reactor according to claim 1 is characterized in that: saidly be used to support N
2The support unit of 0 catalytic bed (8) is a circular arc band steel supporting grating.
5. environment-friendly type ammonia oxidation reactor according to claim 1 is characterized in that: said housing (1) divides for the two portions up and down that connected by flange (16) to form in platinum guaze catalytic bed (6) corresponding position.
6. according to any described environment-friendly type ammonia oxidation reactor in the claim 1 to 5, it is characterized in that: said sparger (7) is served as reasons and is gone up the bilayer structure of grid distributor and following grid distributor composition, and said upward grid distributor is the grid orifice plate, and following grid distributor is a porous plate.
7. environment-friendly type ammonia oxidation reactor according to claim 6 is characterized in that: partly be provided with water wall (17) in said housing (1) inwall, reaction heat recovery zone corresponding shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203721193U CN202284148U (en) | 2011-09-30 | 2011-09-30 | Environment-friendly ammonium oxidation reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203721193U CN202284148U (en) | 2011-09-30 | 2011-09-30 | Environment-friendly ammonium oxidation reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202284148U true CN202284148U (en) | 2012-06-27 |
Family
ID=46295676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203721193U Expired - Lifetime CN202284148U (en) | 2011-09-30 | 2011-09-30 | Environment-friendly ammonium oxidation reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202284148U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523760A (en) * | 2013-10-30 | 2014-01-22 | 欧萨斯能源环境设备(南京)有限公司 | Ammonium oxidation furnace distributor |
| CN103803514A (en) * | 2014-01-28 | 2014-05-21 | 中海油太原贵金属有限公司 | Method for producing nitric acid |
| WO2020161558A1 (en) * | 2019-02-07 | 2020-08-13 | Deepak Nitrite Limited | Apparatus and process for conversion of ammonia into oxides of nitrogen |
-
2011
- 2011-09-30 CN CN2011203721193U patent/CN202284148U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103523760A (en) * | 2013-10-30 | 2014-01-22 | 欧萨斯能源环境设备(南京)有限公司 | Ammonium oxidation furnace distributor |
| CN103803514A (en) * | 2014-01-28 | 2014-05-21 | 中海油太原贵金属有限公司 | Method for producing nitric acid |
| WO2020161558A1 (en) * | 2019-02-07 | 2020-08-13 | Deepak Nitrite Limited | Apparatus and process for conversion of ammonia into oxides of nitrogen |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120627 |
|
| CX01 | Expiry of patent term |