CN220834951U - Ammonia water gasification system of organic heat carrier furnace - Google Patents
Ammonia water gasification system of organic heat carrier furnace Download PDFInfo
- Publication number
- CN220834951U CN220834951U CN202322539258.6U CN202322539258U CN220834951U CN 220834951 U CN220834951 U CN 220834951U CN 202322539258 U CN202322539258 U CN 202322539258U CN 220834951 U CN220834951 U CN 220834951U
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- ammonia water
- ammonia
- storage box
- water storage
- heat carrier
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- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 title claims abstract description 137
- 235000011114 ammonium hydroxide Nutrition 0.000 title claims abstract description 137
- 238000002309 gasification Methods 0.000 title claims abstract description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000010438 heat treatment Methods 0.000 claims abstract description 24
- 238000002347 injection Methods 0.000 claims abstract description 7
- 239000007924 injection Substances 0.000 claims abstract description 7
- 229910021529 ammonia Inorganic materials 0.000 claims description 29
- 229910001220 stainless steel Inorganic materials 0.000 claims description 8
- 239000010935 stainless steel Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 16
- 239000003546 flue gas Substances 0.000 abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000007921 spray Substances 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000006200 vaporizer Substances 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 1
- 239000004202 carbamide Substances 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 239000008236 heating water Substances 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- Chimneys And Flues (AREA)
Abstract
The utility model relates to the technical field of SCR flue gas denitration, and mainly discloses an ammonia water gasification system of an organic heat carrier furnace, which comprises an ammonia water storage tank, an ammonia water pump, a metering controller and an ammonia water gasifier which are sequentially connected, wherein the ammonia water gasifier is horizontally arranged on a vertical section of a high-temperature flue, the ammonia water gasifier comprises an ammonia water storage box, a heating fin group and a top plate, an ammonia water injection hole is formed in the ammonia water storage box, the metering controller is connected with the ammonia water injection hole, the heating fin group is arranged at the bottom of the ammonia water storage box, the top of the ammonia water storage box is provided with the top plate with uniformly distributed top emission holes, ammonia water is injected into the ammonia water storage box through the ammonia water pump and the metering controller, the temperature of high-temperature flue gas of the high-temperature flue is increased after being heated to reach the gasification temperature of the ammonia water, the gasified ammonia gas is uniformly dispersed and overflowed through the top emission holes, the flue gas and the ammonia gas are well dispersed and uniformly mixed in the flue are guaranteed, and stable output of the ammonia gas is facilitated to be realized, and stable operation of a denitration system is ensured.
Description
Technical Field
The utility model relates to the technical field of SCR flue gas denitration, in particular to an ammonia water gasification system of an organic heat carrier furnace.
Background
When ammonia water is used as the SCR denitration reducing agent, the ammonia water has the advantages of being safer than liquid ammonia and lower than urea cost, so that the ammonia water is increasingly used as the reducing agent of the SCR denitration system. When ammonia water is used as a reducing agent for the SCR denitration system, the ammonia water is gasified into ammonia gas, and the ammonia gas participates in the SCR denitration reaction. Generally, ammonia water with 20% concentration is used as a reducing agent of the SCR denitration system.
In the SCR denitration process using ammonia water as a reducing agent, an ammonia water evaporator is a key device, in the prior art, a tubular heat exchanger or electric heating is mostly adopted, and the ammonia water is indirectly heated through a heat medium such as steam, so that the ammonia water is gasified into ammonia gas, the heating mode can adopt an existing mature heat exchange device, the existing device for heating the ammonia water by steam is limited although the device is used in many ways, the defects are great, the device is limited by various aspects, the device is limited by the size of the steam, condensed water exists or not, the heating temperature is limited, and when the ammonia amount is changed, the flow and the temperature of the ammonia gas are difficult to realize the cooperative and consistent control, the subsequent catalytic reduction reaction is not facilitated, meanwhile, once condensate is generated, the temperature of the steam has a large influence on the ammonia gas in the evaporator, and the ammonia gas is not stably and continuously supplied to react, so that the NOx of an organic heat carrier furnace is continuously over-standard, and an environment-friendly accident occurs.
In the prior art, ammonia water is directly heated by a flue, the ammonia water is sprayed into the flue through a spray gun by a pressurizing device, the vaporous ammonia water is gasified by the heat of the flue, a special gasifying device and any external heat source are not needed in the form, the ammonia water is gasified by completely utilizing the self heat of the flue gas to be denitrified, the process is simple, the implementation is convenient, the investment and the operation cost are extremely low, but the spray gun or other spraying devices are blocked after being used for a long time, the spray gun or other spraying devices are required to be produced after maintenance and replacement, and thus the time and the operation cost are increased undoubtedly.
Disclosure of utility model
The utility model aims to provide an ammonia water gasification system of an organic heat carrier furnace, which is favorable for realizing stable output of ammonia gas and guaranteeing stable operation of a denitration system.
The technical scheme of the utility model for achieving the purpose is that an ammonia water gasification system of an organic heat carrier furnace is connected with a high-temperature flue in front of a denitration reactor, the system comprises an ammonia water storage tank, an ammonia water pump, a metering controller and an ammonia water gasifier, the ammonia water storage tank, the ammonia water pump, the metering controller and the ammonia water gasifier are sequentially connected, the ammonia water gasifier is horizontally arranged on a vertical section of the high-temperature flue, the ammonia water pump is a plunger pump and is used for pumping ammonia water in the ammonia water storage tank into the ammonia water gasifier, the metering controller comprises a regulating valve and a flowmeter and is used for monitoring and controlling the flow of ammonia water, the ammonia water gasifier comprises an ammonia water storage box, a heating fin group and a top plate, the metering controller is connected with the ammonia water storage box through a pipeline, the bottom of the ammonia water storage box is provided with the heating fin group and is used for increasing the heat exchange surface area of the storage box, the top plate is provided with a top emission hole, the ammonia water storage box, the ammonia water and the heating water pump are made of heat-resistant stainless steel materials, and the ammonia water storage box and the ammonia water can be uniformly dispersed and evenly distributed into the flue gas through the ammonia water pump and the top plate through the metering controller, and the ammonia water can be well dispersed and the temperature of the ammonia water can reach the temperature after the ammonia water storage box and the flue is uniformly gasified through the high temperature and the flue, and the ammonia gas is well dispersed and the temperature can reach the temperature after the ammonia gas is well dispersed and the temperature and the high temperature and the flue is well vaporized through the high temperature and the temperature through the ammonia gas.
Further, the ammonia water storage box is a flat box body with an opening at the upper part.
Further, one side of roof be provided with the venthole, the top of venthole be provided with the semicircle pipe, the top of semicircle pipe also be provided with the top and distribute the hole, the both ends of semicircle pipe be provided with both ends and distribute the hole. Through above-mentioned technical scheme, when flue gas heating aqueous ammonia storage box, ammonia can follow the venthole simultaneously and send out the hole blowout through the both ends at semicircle pipe both ends to the top at semicircle pipe top, and a plurality of direction openings make ammonia can be better mix in the flue.
Further, the heating fin group comprises 5-10 groups of fins, the fins are vertically welded at the bottom of the ammonia water storage box, and the direction of the fins is consistent with the flow direction of high-temperature flue gas in the high-temperature flue.
Furthermore, the air outlet holes are arranged on two sides of the top plate, and semicircular pipes are arranged above the two air outlet holes, so that the emission direction of ammonia can be further increased;
Further, 2-6 air outlets are formed, each air outlet is uniformly distributed on the top plate, and each air outlet is provided with a semicircular tube, so that the emission rate and the emission direction of ammonia can be further increased;
Further, the ammonia water storage box is made of a 310S heat-resistant stainless steel plate, and the thickness of the stainless steel plate is 6mm-10mm;
further, the heating fin group is made of a 310S heat-resistant stainless steel plate;
Further, the length of the ammonia water storage box is 60cm-100cm, the width of the ammonia water storage box is 60cm-100cm, and the height of the ammonia water storage box is 6cm-10cm;
further, the diameter of the top emission hole is 6mm-10mm.
Compared with the prior art, the utility model has the beneficial effects that:
The utility model adopts the mode of directly heating the device by high-temperature hot air to realize stable and continuous gasification of ammonia water, and can control the output ammonia flow through the flow of the ammonia water plunger pump, and under the condition of complete gasification of the ammonia water, the output flow control does not depend on other factors, thereby converting complex output flow control into simple flow control of input fluid, thereby simplifying the control mode and being beneficial to improving the control precision and accuracy; meanwhile, the heat energy in the hot air can be utilized more effectively by adopting a direct heating mode of high-temperature hot air, and favorable conditions are provided for improving the utilization rate and the utilization efficiency of the heat energy. In addition, the ammonia water with the concentration of 20% is adopted as an ammonia source, and the ammonia water sprayed from the ammonia water injection pipe is rapidly mixed with high-temperature hot air to form ammonia gas with the required concentration, so that the gasification rate of the ammonia water is greatly improved, and the requirements are more effectively met.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a diagram showing the overall construction of the ammonia gasification system and denitration reactor of the present utility model,
FIG. 2 is an enlarged schematic view of the ammonia vaporizer of the present utility model,
FIG. 3 is a perspective view of the ammonia vaporizer of the present utility model.
In the figure: 1. high temperature flue, 2, aqueous ammonia holding vessel, 3, ammonia pump, 4, aqueous ammonia metering controller, 5, aqueous ammonia vaporizer, 6, denitration reactor, 7, heating fin group, 8, aqueous ammonia storage box, 9, roof, 10, top and give off the hole, 11, venthole, 12, semicircle pipe, 13, aqueous ammonia injection hole, 14, both ends give off the hole.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Example 1
As shown in FIG. 1, an organic heat carrier furnace ammonia gasification system, be connected with high temperature flue 1 before denitration reactor 6, according to prior art knows, denitration reactor 6 top-down has set gradually three-layer catalyst, and all be provided with the soot blower in the top of catalyst, this system includes ammonia water holding vessel 2, ammonia water pump 3, measurement controller 4 and ammonia water gasifier 5, ammonia water holding vessel 2, ammonia water pump 3, measurement controller 4 and ammonia water gasifier 5 connect gradually, ammonia water gasifier 5 level set up in the vertical section of high temperature flue 1, ammonia water pump 3 is the plunger pump for with ammonia water pump 3 in holding vessel 2 go into ammonia water gasifier 5, measurement controller 4 includes governing valve and flowmeter for monitor and control the flow of ammonia water, ammonia water storage vessel 8, heating ammonia water set 7 and roof 9, ammonia water storage vessel 8 on be provided with ammonia water 13, measurement controller 4 pass through the pipeline and be connected with 13, ammonia water storage vessel 2, ammonia water pump 3 be provided with the injection hole set up for heating the ammonia water set of 7, ammonia water storage vessel 8 has the heat-resisting material of heat exchange fin set 9 to be the top of filling hole, the roof plate 8 is provided with the top rust box 8, the top is provided with the heat-resistant material of ammonia water storage 9.
The utility model adopts the mode of directly heating the device by high-temperature hot air to realize stable and continuous gasification of ammonia water, and can control the output ammonia flow through the flow control of the ammonia water pump, and the output flow control is independent of other factors under the condition of complete gasification of the ammonia water, thereby converting complex output flow control into simple flow control of input fluid, simplifying the control mode and being beneficial to improving the control precision and accuracy.
Example 2
This embodiment is based on example 1, as shown in figures 2-3,
Further, the ammonia water storage box 8 is a flat box body with an opening at the upper part, so as to increase the heating area of the ammonia water. The length of the ammonia water storage box 8 is 100cm, the width of the ammonia water storage box 8 is 60cm, and the height of the ammonia water storage box 8 is 6cm; the diameter of the top emission hole 10 is 6mm ammonia gasification hole, the size of the ammonia storage box 8 is determined according to the size of the ammonia storage box 8, the size of the ammonia storage box 8 is determined by combining the length and the width of a flue, the purpose is to enable ammonia gas to be uniformly dispersed in the whole flue gas pipeline, the heating fin group 7 comprises 5-10 groups of fins, the fins are vertically welded at the bottom of the ammonia storage box 8, and the direction of the fins is consistent with the flow direction of high-temperature flue gas in the high-temperature flue 1. The ammonia water storage box 8 is made of a 310S heat-resistant stainless steel plate, and the thickness of the stainless steel plate is 6mm; the heating fin group 7 is made of a 310S heat-resistant stainless steel plate; the gas outlet holes 11 are arranged on two sides of the top plate 9, the semicircular pipes 12 are arranged above the two gas outlet holes 11, so that the ammonia gas emission direction can be further increased, the top of the semicircular pipe 12 is also provided with a top emission hole 10, and two ends of the semicircular pipe 12 are provided with two end emission holes 14. When the flue gas heats the ammonia water storage box 8, ammonia can flow out from the air outlet hole 11 and be sprayed out through the top emission holes 10 at the top of the semicircular tube 12 and the two emission holes 14 at the two ends of the semicircular tube 12, and the ammonia can be better mixed in the flue due to the openings in multiple directions.
Example 3
Based on the embodiment 1 and the embodiment 2, in order to further increase the emission rate and the emission direction of the ammonia gas, 2 to 6 air outlet holes 11 are arranged, each air outlet hole 11 is uniformly distributed on the top plate 9, and each air outlet hole 11 is provided with a semicircular tube 12.
The using process comprises the following steps:
According to the technical scheme, ammonia water is injected into the ammonia water storage box 8 through the ammonia water pump 3 and the metering controller 4, the high-temperature flue gas of the high-temperature flue 1 of the organic heat carrier furnace is used for heating, then the temperature of the ammonia water storage box 8 is increased, the gasification temperature of the ammonia water is reached, the ammonia water is gasified, the gasified ammonia gas is uniformly dispersed and overflowed through the top emission holes 10, the flue gas and the ammonia gas are well dispersed and uniformly mixed in the flue, and the ammonia water storage box is beneficial to realizing flow regulation and control of the ammonia gas and saving the use amount of the ammonia water. The ammonia water can be continuously heated by utilizing the temperature of the high-temperature flue gas, the reaction rate is improved, the gasification effect is ensured, the ammonia gas is taken as a denitration agent to enter a high-temperature flue gas denitration device, NO X in the flue gas is decomposed into N 2 and H 2 O under the action of a catalyst, and the aim of denitration is achieved.
Compared with a spray gun, the ammonia water gasifier of the system has longer service life, can not cause blockage, reduces the times of maintenance and replacement, and improves the production efficiency.
It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present utility model may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. An organic heat carrier furnace ammonia gasification system is connected with a high-temperature flue (1) in front of a denitration reactor (6), and is characterized in that: the system comprises an ammonia water storage tank (2), an ammonia water pump (3), a metering controller (4) and an ammonia water gasifier (5) which are sequentially connected, wherein the ammonia water gasifier (5) is horizontally arranged on a vertical section of a high-temperature flue (1), the ammonia water gasifier (5) comprises an ammonia water storage box (8), a heating fin group (7) and a top plate (9), an ammonia water injection hole (13) is formed in the ammonia water storage box (8), the metering controller (4) is connected with the ammonia water injection hole (13) through a pipeline, a heating fin group (7) is arranged at the bottom of the ammonia water storage box (8), the top of the ammonia water storage box (8) is provided with the top plate (9), and top emission holes (10) are uniformly distributed in the top plate (9).
2. An organic heat carrier furnace ammonia gasification system according to claim 1 wherein: the ammonia water storage box (8) is a flat box body with an opening at the upper part.
3. An organic heat carrier furnace ammonia gasification system according to claim 2 wherein: the top plate (9) on be provided with venthole (11), the top of venthole (11) be provided with semicircle pipe (12), the top of semicircle pipe (12) also be provided with top and distribute hole (10), the both ends of semicircle pipe (12) be provided with both ends and distribute hole (14).
4. An organic heat carrier furnace ammonia gasification system according to claim 3 wherein: the heating fin group (7) comprises 5-10 groups of fins, and the fins are vertically welded at the bottom of the ammonia water storage box (8).
5. An organic heat carrier furnace ammonia gasification system according to any one of claims 1 to 4 wherein: the ammonia water storage box (8) and the heating fin group (7) are made of 310S heat-resistant stainless steel plates.
6. An organic heat carrier furnace ammonia gasification system according to claim 1 wherein: the ammonia water pump (3) is a plunger pump, and the metering controller (4) comprises a regulating valve and a flowmeter.
7. An organic heat carrier furnace ammonia gasification system according to claim 2 wherein: the length of the ammonia water storage box (8) is 60cm-100cm, the width of the ammonia water storage box (8) is 60cm-100cm, and the height of the ammonia water storage box (8) is 6cm-10cm; the diameter of the top emission hole (10) is 6mm-10mm.
8. An organic heat carrier furnace ammonia gasification system according to claim 3 wherein: the air outlet holes (11) are arranged on two sides of the top plate (9), and semicircular pipes (12) are arranged above the two air outlet holes (11).
9. An organic heat carrier furnace ammonia gasification system according to claim 3 wherein: the number of the air outlet holes (11) is 2-6, each air outlet hole (11) is uniformly distributed on the top plate (9), and each air outlet hole (11) is provided with a semicircular tube (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322539258.6U CN220834951U (en) | 2023-09-18 | 2023-09-18 | Ammonia water gasification system of organic heat carrier furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322539258.6U CN220834951U (en) | 2023-09-18 | 2023-09-18 | Ammonia water gasification system of organic heat carrier furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220834951U true CN220834951U (en) | 2024-04-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322539258.6U Active CN220834951U (en) | 2023-09-18 | 2023-09-18 | Ammonia water gasification system of organic heat carrier furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220834951U (en) |
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2023
- 2023-09-18 CN CN202322539258.6U patent/CN220834951U/en active Active
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