CN203803378U - Rotary type HC-SCR (Hydrocarbon-Selective Catalytic Reduction) denitration reactor - Google Patents
Rotary type HC-SCR (Hydrocarbon-Selective Catalytic Reduction) denitration reactor Download PDFInfo
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- CN203803378U CN203803378U CN201420185545.XU CN201420185545U CN203803378U CN 203803378 U CN203803378 U CN 203803378U CN 201420185545 U CN201420185545 U CN 201420185545U CN 203803378 U CN203803378 U CN 203803378U
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Abstract
The utility model relates to a rotary type HC-SCR (Hydrocarbon-Selective Catalytic Reduction) denitration reactor. The rotary type HC-SCR denitration reactor comprises a cylindrical catalyst body structure and a shell outside the catalyst body structure, wherein the catalyst body structure comprises a center shaft rotor and a plurality of circular catalyst layers which can rotate around the center shaft rotor; each circular catalyst layer is divided into an adsorption region and a reduction region by a radial sealing plate and an axial sealing plate; a transition region is arranged between each adsorption region and the corresponding reduction region; the adsorption region, the reduction region and the transition region are different sector-shaped regions on each circular catalyst layer; the adsorption regions of the circular catalyst layers are communicated with one another up and down; the reduction regions of the circular catalyst layers are communicated with one another up and down; the shell is provided with air inlets and air outlets which correspond to the adsorption regions and the reduction regions, respectively. The adsorption regions and the reduction regions are separated so as to be good for improving the efficiencies of adsorption and reduction processes, and furthermore, the denitration efficiency of the whole reactor is improved.
Description
Technical field
The utility model relates to the fume treatment auxiliary of power plant or other coal-burning boiler, is specifically related to a kind of swinging HC-SCR Benitration reactor, belongs to coal-fired flue-gas pollution reduction technological innovation field.
Background technology
Nitrogen oxide (NOx) is one of Air Pollutants, can form acid rain or acid mist be combined with hydrocarbon form photochemical fog, damage the ozone layer etc.At present, more than 60% nitrogen oxide comes from the flue gas that coal combustion produces.At present application at most in the world, the most ripe and the most fruitful a kind of gas denitrifying technology is the selective catalysis reducing NOx technology (NH taking ammonia as reducing agent
3-SCR).NH
3-SCR technology denitration efficiency is high, mature and reliable, and strong adaptability, is particularly suitable for that ature of coal is changeable, unit load variation is frequent and air quality is required on the coal-fired unit in more sensitive region, use.But SCR technology is reducing agent because employing sprays into ammonia, can produce corrosion to pipeline; Control the improper problem such as obstruction that easily makes the escaping of ammonia produce secondary pollution and cause air preheater.
As NH
3the substitute technology of-SCR, the SCR denitration technology (HC-SCR) taking hydrocarbon as reducing agent is just becoming the focus of domestic research.Reducing agent can be selected methane, ethane, ethene, ethanol, propane, one or several of a series of hydrocarbons such as propylene.Total denitration reaction equation as the formula (1).Can effectively avoid the escaping of ammonia problem using hydrocarbon as reducing agent, reducing agent is with low cost simultaneously, has more wide market prospects.
NO+HC+O
2→N
2+CO
2+H
2O （1）
At present, a major reason that affects HC-SCR technology denitration efficiency is the negative effect to NOx reduction reaction of oxygen in flue gas.For most HC-SCR reactions, more generally acknowledged reaction mechanism is: first, the NO in flue gas is oxidized by oxygen into NO
2, be adsorbed to catalyst surface simultaneously.Be adsorbed to the NO of catalyst surface
2reduced by hydrocarbon, generate N
2, CO
2and H
2o.Meanwhile, can also be by the O in flue gas as the hydrocarbon of reducing agent
2be oxidized to CO
2and H
2o, has so just greatly reduced the reducing agent share that can be effective to reducing NOx.So the oxygen concentration in flue gas is higher, the share of the hydrocarbon being oxidized by oxygen is just more, and hydrocarbon just more can not effectively be used in reducing NOx, and the denitration efficiency of entirety will be lower.Therefore, need a kind of novel HC-SCR Benitration reactor, rationally avoid the inhibitory action of oxygen to NOx reduction reaction, improve overall denitration efficiency.
Utility model content
The purpose of this utility model is to provide a kind of swinging HC-SCR Benitration reactor, taking hydrocarbon as reducing agent, and the inhibitory action of the oxygen during this reactor can remove smoke to HC-SCR denitration reaction, the overall denitration efficiency of raising Benitration reactor.
The technical solution adopted in the utility model is:
A kind of swinging HC-SCR Benitration reactor, comprise the housing of catalyst body structure and catalyst body structure outside, catalyst body structure is cylindrical, comprise central shaft rotor, can be around the circular catalyst layer of the multilayer of central shaft rotor, the circular catalyst layer of multilayer is divided into adsorption zone and reducing zone by radial seal plate and axial sealing plate, between adsorption zone and reducing zone, there is transition region, adsorption zone, reducing zone, transition region shows as different sector regions on every layer of circular catalyst layer, the adsorption zone of each layer of circular catalyst layer communicates up and down, the reducing zone of each layer of circular catalyst layer communicates up and down, housing is provided with the air inlet corresponding with adsorption zone and reducing zone difference, air outlet.
Described circular catalyst layer is on circular frame, to load the honeycombed catalyst layer that can have full communication between the higher and lower levels.Described catalyst adopts the non-precious metal catalysts such as Fe or Cu, and this metal can be carried on the sieve and silica-sesquioxide such as molecular sieve, aluminium oxide carrier, and cost is lower.
On described circular catalyst layer, the sector region of adsorption zone is 180 °-240 °, and the sector region of reducing zone is 120 °-160 °, and the sector region of transition region is 30 °.
The type of drive of described catalyst body structure can adopt peripheral drive or central shaft to drive.
The logical flue gas of described adsorption zone.
Described reducing zone passes into reducing agent, and reducing agent can adopt methane (CH
4), ethane (C
2h
6), ethene (C
2h
4), propane (C
3h
8), propylene (C
3h
6), butane (C
4h
10), butylene (C
4h
8) etc. a series of hydrocarbon (C
nh
m) one or several combination, this reducing agent can be diluted with nitrogen, the concentration range of hydrocarbon is 1-20%.
The volume flow ratio scope of described reducing agent and flue gas is 1:20～1:400.The inlet temperature of flue gas is 200～500 DEG C.Reducing agent inlet temperature is identical with input gas temperature or slightly high, with the temperature difference scope of flue gas be 0～50 DEG C.
The catalyst body structure of loading catalyst continues rotation, in the alternate cycles of adsorption zone and reducing zone.First catalyst rotates to adsorption zone, and the NOx in flue gas is attracted to catalyst surface at adsorption zone.Catalyst continues to select to reducing zone, and reducing agent will be adsorbed on the NOx reduction of catalyst surface and remove from catalyst surface.The catalyst of NO_x removal will continue to rotate back to adsorption zone with reactor, carry out next round absorption-reduction process.Axial sealing plate and radial seal plate can reduce leaking out between each region.
In reactor of the present utility model, adsorption zone circulation flue gas, carries out the absorption of NOx; Reducing zone circulation reducing agent, carries out the reduction reaction of NOx, and the reaction atmosphere in this process is controlled, can reach optimum response situation.The separating of adsorption zone and reducing zone is conducive to improve respectively the efficiency of absorption and reduction process, and then improves the denitration efficiency of whole reactor, and Expected Results is 1.5～2 times of popular response device, and overall denitration efficiency can reach 85%～100%.
Brief description of the drawings
Fig. 1 is the structure cutaway view of the utility model Benitration reactor;
Fig. 2 is the structure top view of the utility model Benitration reactor;
Fig. 3 is that circular catalyst layer distributes.
Wherein, 1. housing, 2. central shaft rotor, 3. radial seal plate, 4. circular catalyst layer, 5. adsorption zone, 6. transition region, 7. reducing zone, 8. flue gas air inlet, 9. flue gas air outlet, 10. reducing agent air inlet, 11. reducing agent air outlets.
Detailed description of the invention
Further illustrate below in conjunction with detailed description of the invention.
A kind of swinging HC-SCR Benitration reactor, comprise the housing 1 of catalyst body structure and catalyst body structure outside, catalyst body structure is cylindrical, comprise central shaft rotor 2, the circular catalyst layer 4 of multilayer that can rotate around central shaft rotor 2, the circular catalyst layer 4 of multilayer is divided into adsorption zone 5 and reducing zone 7 by radial seal plate 3 and axial sealing plate, between adsorption zone 5 and reducing zone 7, there is transition region 6, adsorption zone 5, reducing zone 7, transition region 6 shows as different sector regions on every layer of circular catalyst layer 4, the adsorption zone of each layer of circular catalyst layer communicates up and down, the reducing zone of each layer of circular catalyst layer communicates up and down, housing is provided with the air inlet corresponding with adsorption zone and reducing zone difference, air outlet, as flue gas air inlet 8 in figure, flue gas air outlet 9, reducing agent air inlet 10, reducing agent air outlet 11.
Circular catalyst layer is on circular frame, to load the honeycombed catalyst layer that can have full communication between the higher and lower levels.Adsorption zone leads to flue gas, and reducing zone passes into reducing agent, and reducing agent can adopt methane (CH
4), ethane (C
2h
6), ethene (C
2h
4), propane (C
3h
8), propylene (C
3h
6), butane (C
4h
10), butylene (C
4h
8) etc. a series of hydrocarbon (C
nh
m) one or several combination, this reducing agent can be diluted with nitrogen, the concentration range of hydrocarbon is 1-20%.
The volume flow ratio scope of reducing agent and flue gas is 1:20～1:400.The inlet temperature of flue gas is 200～500 DEG C.Reducing agent inlet temperature is identical with input gas temperature or slightly high, with the temperature difference scope of flue gas be 0～50 DEG C.
The catalyst body structure of loading catalyst continues rotation, in the alternate cycles of adsorption zone and reducing zone.
Claims (5)
1. a swinging HC-SCR Benitration reactor, it is characterized in that, comprise the housing of catalyst body structure and catalyst body structure outside, catalyst body structure is cylindrical, comprise central shaft rotor, can be around the circular catalyst layer of the multilayer of central shaft rotor, the circular catalyst layer of multilayer is divided into adsorption zone and reducing zone by radial seal plate and axial sealing plate, between adsorption zone and reducing zone, there is transition region, adsorption zone, reducing zone, transition region shows as different sector regions on every layer of circular catalyst layer, the adsorption zone of each layer of circular catalyst layer communicates up and down, the reducing zone of each layer of circular catalyst layer communicates up and down, housing is provided with the air inlet corresponding with adsorption zone and reducing zone difference, air outlet.
2. a kind of swinging HC-SCR Benitration reactor according to claim 1, is characterized in that, described circular catalyst layer is on circular frame, to load the honeycombed catalyst layer that can have full communication between the higher and lower levels.
3. a kind of swinging HC-SCR Benitration reactor according to claim 1 and 2, it is characterized in that, on described circular catalyst layer, the sector region of adsorption zone is 180 °-240 °, and the sector region of reducing zone is 120 °-160 °, and the sector region of transition region is 30 °.
4. a kind of swinging HC-SCR Benitration reactor according to claim 1, is characterized in that, the type of drive of described catalyst body structure adopts peripheral drive or central shaft to drive.
5. a kind of swinging HC-SCR Benitration reactor according to claim 1, is characterized in that, the logical flue gas of described adsorption zone, and described reducing zone passes into reducing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420185545.XU CN203803378U (en) | 2014-04-17 | 2014-04-17 | Rotary type HC-SCR (Hydrocarbon-Selective Catalytic Reduction) denitration reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420185545.XU CN203803378U (en) | 2014-04-17 | 2014-04-17 | Rotary type HC-SCR (Hydrocarbon-Selective Catalytic Reduction) denitration reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203803378U true CN203803378U (en) | 2014-09-03 |
Family
ID=51442190
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420185545.XU Withdrawn - After Issue CN203803378U (en) | 2014-04-17 | 2014-04-17 | Rotary type HC-SCR (Hydrocarbon-Selective Catalytic Reduction) denitration reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203803378U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103908892A (en) * | 2014-04-17 | 2014-07-09 | 山东大学 | Rotary HC-SCR (Hydrocarbon Selective Catalyst Reduction) denitration reactor |
| CN112588111A (en) * | 2020-12-28 | 2021-04-02 | 西安交通大学 | Flue gas denitration system for burning and power generation by using semi-coke tail gas |
-
2014
- 2014-04-17 CN CN201420185545.XU patent/CN203803378U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103908892A (en) * | 2014-04-17 | 2014-07-09 | 山东大学 | Rotary HC-SCR (Hydrocarbon Selective Catalyst Reduction) denitration reactor |
| CN112588111A (en) * | 2020-12-28 | 2021-04-02 | 西安交通大学 | Flue gas denitration system for burning and power generation by using semi-coke tail gas |
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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: 20140903 Effective date of abandoning: 20150812 |
|
| RGAV | Abandon patent right to avoid regrant |