CN214581186U - Heat exchanger for high-temperature high-moisture denitration flue gas - Google Patents
Heat exchanger for high-temperature high-moisture denitration flue gas Download PDFInfo
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- CN214581186U CN214581186U CN202120123790.8U CN202120123790U CN214581186U CN 214581186 U CN214581186 U CN 214581186U CN 202120123790 U CN202120123790 U CN 202120123790U CN 214581186 U CN214581186 U CN 214581186U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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Abstract
The utility model discloses a heat exchanger for high temperature high moisture denitration flue gas, including the heat transfer room, the heat transfer room is equipped with flue gas inlet, air intlet, exhanst gas outlet and air outlet all around in proper order, is equipped with a plurality of heat exchange tubes in the heat transfer room, and flue gas inlet and exhanst gas outlet all communicate with the heat transfer room, between flue gas inlet and the heat transfer room, all be equipped with the shrouding between exhanst gas outlet and the heat transfer room, flue gas inlet and exhanst gas outlet all communicate with the heat exchange tube, and the heat transfer room below is equipped with the water catch bowl. This heat exchanger for high temperature high moisture denitration flue gas, through the heat exchange tube, give the low temperature air with the heat transfer of high temperature flue gas, reduce the flue gas temperature fast, make saturated vapor in the flue gas progressively obtain the cooling, become liquid from the gaseous state, the function that blocks of cooperation breakwater, water droplet in the flue gas after will cooling blocks and gathers, and collect the discharge through the water catch bowl, thereby reduce the steam content who takes off the round pin flue gas effectively, avoid taking off the round pin flue gas and discharge into the atmosphere after, condense rapidly, the aggravation haze forms.
Description
Technical Field
The utility model relates to a flue gas treatment field, concretely relates to heat exchanger is used to high temperature high moisture denitration flue gas.
Background
The chemical industry can produce a large amount of high temperature high moisture flue gas containing nitre in the production process, and the moisture content of the flue gas exhausted into the atmosphere from a chimney should be reduced after denitration and purification. Otherwise, the flue gas can be discharged from the chimney with a large amount of water vapor, and the formation of haze is aggravated.
Therefore, it is necessary to provide a new heat exchanger for high-temperature and high-moisture denitration flue gas to solve the above problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome the defect that exists among the prior art, provide a heat exchanger for high temperature high moisture denitration flue gas can reduce the steam content of taking off the round pin flue gas effectively, avoid taking off the round pin flue gas and emit into the atmosphere after, condense rapidly, the formation of aggravation haze.
For realizing above-mentioned purpose, the technical scheme of the utility model a heat exchanger is used to high temperature high moisture denitration flue gas is provided, including the heat transfer room, the heat transfer room is equipped with flue gas inlet, air intlet, exhanst gas outlet and air outlet all around in proper order, be equipped with a plurality of heat exchange tubes in the heat transfer room, flue gas inlet and exhanst gas outlet all communicate with the heat transfer room, between flue gas inlet and the heat transfer room, all be equipped with the shrouding between exhanst gas outlet and the heat transfer room, flue gas inlet and exhanst gas outlet all communicate with the heat exchange tube, the heat transfer room below is equipped with the water catch bowl.
The further preferred technical scheme is that the flue gas inlet, the air inlet, the flue gas outlet and the air outlet are in a table shape, and one end with a larger opening faces the heat exchange chamber.
According to a further preferred technical scheme, a plurality of smoke splitter plates are arranged in the smoke inlet, and a plurality of air splitter plates are arranged in the air inlet.
The further preferable technical scheme is that a plurality of radiating fins are arranged on the heat exchange tube.
The further preferred technical scheme is that the heat exchange tubes comprise stainless steel tubes with the specification of DN32, and the heat exchange tubes are densely and alternately arranged in the heat exchange chamber.
The further preferred technical scheme is that a water falling plate is arranged between the water collecting tank and the heat exchange chamber, a plurality of water falling holes are uniformly distributed on the water falling plate, and the aperture of each water falling hole is 15-25 mm.
The further preferred technical scheme is that the smoke inlet, the air inlet, the smoke outlet, the air outlet, the heat exchange chamber and the water collecting tank are all made of low-carbon steel, and the surfaces of the smoke inlet, the air inlet, the smoke outlet, the air outlet, the heat exchange chamber and the water collecting tank are coated with high-temperature-resistant anticorrosive paint.
According to a further preferable technical scheme, a plurality of baffle plates which are arranged in a staggered mode are arranged in the smoke outlet, and the baffle plates are made of 316L folded steel plates.
Further preferably, the flue gas flow velocity of the flue gas inlet is 15-20m/s, the flue gas flow velocity of the flue gas outlet is reduced to 10-15m/s, and the air flow velocity in the heat exchange pipe is 15-18 m/s.
The residence time of the high-temperature flue gas in the heat exchanger is generally controlled to be 5 seconds, the flow rate of the flue gas flowing through the inlet end of the heat exchange chamber is generally controlled to be 5m/s, and the outlet end of the heat exchange chamber is 3m/s, so that water drops are prevented from being carried away by the airflow. The flue gas flow velocity of the water baffle is generally 5m/s, so that condensed water drops are attached to the water baffle and then fall on the water falling plate due to gravity to be accumulated in the water collecting tank.
The further preferred technical scheme is that the water collecting tank is communicated with a drain valve.
The utility model has the advantages and the beneficial effects that: through the heat exchange tube, with the heat transfer of high temperature flue gas for the low temperature air, reduce flue gas temperature fast for saturated vapor in the flue gas gradually obtains the cooling, becomes liquid from the gaseous state, cooperates the function that blocks of breakwater, blocks and gathers the water droplet in the flue gas after the cooling, and collects the discharge through the water catch bowl, thereby reduces the steam content of taking off the round pin flue gas effectively, avoids taking off the round pin flue gas and discharges into the atmosphere after, condenses rapidly, aggravates the formation of haze.
Drawings
Fig. 1 is a schematic structural view of the heat exchanger for high-temperature high-moisture denitration flue gas of the utility model;
FIG. 2 is a cross-sectional view along AA of FIG. 1;
FIG. 3 is a cross-sectional view taken along line BB of FIG. 1;
fig. 4 is a schematic structural diagram of a water falling plate of the heat exchanger for high-temperature high-moisture denitration flue gas of the present invention;
in the figure: 1. the heat exchanger comprises a flue gas inlet, a heat exchange chamber 2, a flue gas outlet 3, an air inlet 4, an air outlet 5, a heat exchange pipe 6, a flue gas splitter 7, a water baffle 8, an air splitter 9, a water falling plate 10, a water collecting tank 11, a water discharging valve 12, a sealing plate 13 and a water falling hole 14.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings and examples. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The following provides a preferred embodiment: as shown in fig. 1-3, a heat exchanger for high temperature high moisture denitration flue gas, including heat transfer chamber 2, heat transfer chamber 2 is equipped with inlet for flue gas 1, air intlet 4, exhanst gas outlet 3 and air outlet 5 all around in proper order, be equipped with a plurality of heat exchange tubes 6 in the heat transfer chamber 2, inlet for flue gas 1 and exhanst gas outlet 3 all communicate with heat transfer chamber 2, between inlet for flue gas 1 and the heat transfer chamber 2, all be equipped with shrouding 13 between exhanst gas outlet 3 and the heat transfer chamber 2, inlet for flue gas 1 and exhanst gas outlet 3 all communicate with heat exchange tubes 6, heat transfer chamber 2 below is equipped with water catch bowl 11.
A plurality of flue gas splitter plates 7 are arranged in the flue gas inlet 1, and a plurality of air splitter plates 9 are arranged in the air inlet 4.
The heat exchange tube 6 is provided with a plurality of radiating fins.
The heat exchange tubes 6 comprise stainless steel tubes with the specification of DN32, and the heat exchange tubes 6 are densely and alternately arranged in the heat exchange chamber 2.
As shown in fig. 4, a water falling plate 10 is disposed between the water collecting tank 11 and the heat exchange chamber 2, a plurality of water falling holes 14 are uniformly distributed on the water falling plate 10, and the diameter of each water falling hole 14 is 20 mm.
The flue gas inlet 1, the air inlet 4, the flue gas outlet 3, the air outlet 5, the heat exchange chamber 2 and the water collecting tank 11 are all made of low-carbon steel, and the surfaces of the heat exchange chamber and the water collecting tank are coated with high-temperature-resistant anticorrosive paint.
A plurality of baffle plates which are arranged in a staggered mode are arranged in the smoke outlet 3, and the baffle plates are made of 316L folded steel plates.
The flue gas velocity of the flue gas inlet 1 is 17m/s, the flue gas velocity of the flue gas outlet 3 is reduced to 12m/s, and the air velocity in the heat exchange tube 6 is 16 m/s.
The residence time of the high-temperature flue gas in the heat exchanger is generally controlled to be 5 seconds, the flow speed of the flue gas flowing through the inlet end of the heat exchange chamber 2 is generally controlled to be 5m/s, and the outlet end of the flue gas is controlled to be 3m/s, so that water drops are prevented from being carried away by the airflow. The flue gas flow velocity of the water deflector 8 is typically 5m/s, so that condensation water droplets adhere to the water deflector 8 and subsequently fall by gravity onto the water fall plate 10, accumulating in the water collection sump 11.
The water collecting tank 11 is communicated with a drain valve 12.
The working principle of the heat exchanger for the high-temperature high-moisture denitration flue gas is as follows: the denitrated high-temperature flue gas enters the heat exchanger, the flue gas and low-temperature air are subjected to heat exchange under the action of the heat exchange tube 6 in the heat exchange chamber 2, the temperature is gradually reduced, saturated vapor in the flue gas is gradually cooled and is changed from a gas state to a liquid state, the saturated vapor is accumulated on the water baffle plate 8 through the obstruction of the water baffle plate 8, and the larger the liquid drop is, the liquid drop slides onto the water falling plate 10 at the lower part from the water baffle plate 8. The water falling plate 10 is provided with a plurality of small water leakage holes, accumulated water can be timely drained into the water collecting tank 11 at the lower part, and the accumulated water in the water collecting tank 11 is regularly drained for other use. As an air source for cooling high-temperature flue gas, clean external low-temperature air is blown into the heat exchange tube 6 from the air inlet 4 through the fan, and in the advancing process, the low-temperature air is heated to high-temperature air by the wall of the heat exchange tube 6 and is discharged from the air outlet 5. The high-temperature air can be used as a preheating air source for other processes and can also be discharged to the air.
This heat exchanger for high temperature high moisture denitration flue gas's advantage and beneficial effect lie in:
through heat exchange tube 6, give the low temperature air with the heat transfer of high temperature flue gas, reduce the flue gas temperature fast for saturated vapor in the flue gas gradually obtains the cooling, becomes liquid from the gaseous state, cooperates the function that blocks of breakwater 8, and the water droplet in the flue gas after will cooling blocks and gathers, and collects the discharge through water catch bowl 11, thereby reduces the steam content of taking off the round pin flue gas effectively, avoids taking off the round pin flue gas and discharges into the atmosphere after, condenses rapidly, the formation of aggravation haze.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the technical principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (10)
1. The utility model provides a heat exchanger for high temperature high moisture denitration flue gas, its characterized in that, includes the heat transfer room, the heat transfer room is equipped with flue gas inlet, air intlet, exhanst gas outlet and air outlet all around in proper order, be equipped with a plurality of heat exchange tubes in the heat transfer room, flue gas inlet and exhanst gas outlet all communicate with the heat transfer room, all be equipped with the shrouding between flue gas inlet and the heat transfer room, between exhanst gas outlet and the heat transfer room, flue gas inlet and exhanst gas outlet all communicate with the heat exchange tube, the heat transfer room below is equipped with the water catch bowl.
2. The heat exchanger for high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein the flue gas inlet, the air inlet, the flue gas outlet and the air outlet are in a table shape, and one end with a larger opening faces the heat exchange chamber.
3. The heat exchanger for high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein a plurality of flue gas splitter plates are arranged in the flue gas inlet, and a plurality of air splitter plates are arranged in the air inlet.
4. The heat exchanger for high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein a plurality of fins are arranged on the heat exchange tube.
5. The heat exchanger for high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein the heat exchange tubes comprise stainless steel tubes with specification DN32, and the heat exchange tubes are densely and alternately arranged in the heat exchange chamber.
6. The heat exchanger for the high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein a water falling plate is arranged between the water collecting tank and the heat exchange chamber, a plurality of water falling holes are uniformly distributed on the water falling plate, and the diameter of each water falling hole is 15 mm-25 mm.
7. The heat exchanger for high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein the flue gas inlet, the air inlet, the flue gas outlet, the air outlet, the heat exchange chamber and the water collection tank are all made of low carbon steel and the surfaces of the heat exchange chamber and the water collection tank are coated with high-temperature resistant anticorrosive paint.
8. The heat exchanger for the high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein a plurality of baffles which are arranged in a staggered manner are arranged in the flue gas outlet, and the baffles are made of 316L folded steel plates.
9. The heat exchanger for the high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein the flue gas flow velocity of the flue gas inlet is 15-20m/s, the flue gas flow velocity of the flue gas outlet is reduced to 10-15m/s, and the air flow velocity in the heat exchange pipe is 15-18 m/s.
10. The heat exchanger for the high-temperature high-moisture denitration flue gas as claimed in claim 1, wherein a drain valve is communicated with the water collection tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120123790.8U CN214581186U (en) | 2021-01-15 | 2021-01-15 | Heat exchanger for high-temperature high-moisture denitration flue gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120123790.8U CN214581186U (en) | 2021-01-15 | 2021-01-15 | Heat exchanger for high-temperature high-moisture denitration flue gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214581186U true CN214581186U (en) | 2021-11-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120123790.8U Active CN214581186U (en) | 2021-01-15 | 2021-01-15 | Heat exchanger for high-temperature high-moisture denitration flue gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214581186U (en) |
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2021
- 2021-01-15 CN CN202120123790.8U patent/CN214581186U/en active Active
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