CN209997229U - flue gas reheating system - Google Patents
flue gas reheating system Download PDFInfo
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- CN209997229U CN209997229U CN201920680833.5U CN201920680833U CN209997229U CN 209997229 U CN209997229 U CN 209997229U CN 201920680833 U CN201920680833 U CN 201920680833U CN 209997229 U CN209997229 U CN 209997229U
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- flue gas
- transfer medium
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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 an kind of flue gas reheating system, include the desulfurizing tower, install the chimney at desulfurizing tower top and connect in flue on the desulfurizing tower, be provided with flue gas condenser on the flue, be provided with the radiating part of flue gas reheater within the chimney, the flue gas reheater is located middle part, upper portion or the top of chimney, flue gas condenser with be equipped with the same heat transfer medium in the flue gas reheater, heat transfer medium passes through the pipeline and is in flue gas condenser with flue gas reheater mesocycle intercommunication, this flue gas reheating system reduces or eliminates white smoke plume problem through the flue gas after the heating dehumidification is handled.
Description
Technical Field
The utility model relates to a flue gas processing system especially indicates kinds of flue gas reheating systems.
Background
The temperature of flue gas at the inlet of a chimney, such as flue gas at the outlet of a wet desulphurization tower, is about 45-55 ℃, and contains a large amount of water vapor, the flue gas is basically saturated flue gas, a small amount of liquid water is carried in the flue gas, the flue gas is directly discharged into the atmosphere through the chimney, the atmospheric temperature is far lower than the temperature of the flue gas, and after the flue gas at the outlet of the chimney is mixed with the atmosphere, the temperature of the flue gas is sharply reduced, so that the saturated flue gas generates condensed liquid drops, and white smoke. At present, in order to eliminate the problem of white smoke plume, technical measures such as GGH (Gas-Gas Heater), MGGH (Mitsubishi Gas-Gas Heater) and the like are generally adopted to heat and raise the temperature of desulfurized smoke, and when the heated smoke is discharged out of a chimney, the temperature is difficult to reach the dew point temperature after encountering cold air, liquid drops are not easy to form, and the phenomenon of white smoke is avoided.
Also disclosed in CN208482211U is a kind of smoke and white smoke eliminating system, which comprises a th smoke condenser, a desulfurizing tower, a second smoke condenser, a fan, a demister, a smoke and air mixing flue and a chimney, wherein a smoke outlet of the th smoke condenser is connected to an inlet of the desulfurizing tower, an outlet of the desulfurizing tower is connected to a smoke inlet of the second smoke condenser, a smoke outlet of the second smoke condenser is connected to an inlet of the demister, an outlet of the demister is connected to a smoke inlet of the smoke and air mixing flue, an outlet of the smoke and air mixing flue is connected to the chimney, an outlet of the fan is connected to an air inlet of the second smoke condenser, an air outlet of the second smoke condenser is connected to an air inlet of the th smoke condenser, an air outlet of the th smoke condenser is connected to an air inlet of the smoke and air mixing flue, and an outlet of the smoke and air mixing flue is connected to the chimney.
In the th heat exchange between the flue gas and the cold air in the th flue gas condenser, the cooled flue gas enters the desulfurizing tower, the flue gas is desulfurized in the desulfurizing tower and then conveyed to the second flue gas condenser, the flue gas and the cold air in the second flue gas condenser carry out the second heat exchange, the flue gas cooled in the step is conveyed to the demister for dehumidification, the dehumidified flue gas is mixed with the hot air from the second flue gas condenser in the flue gas-air mixing flue, finally, the mixed flue gas is discharged through the chimney, in addition, , the cold air is conveyed to the second flue gas condenser through the fan to carry out the second heat exchange with the flue gas, the heated cold air enters the th flue gas condenser to absorb the heat in the flue gas again to form the hot air, the hot air is conveyed to the flue gas-air mixing flue gas from the demister, and finally, the mixed flue gas is discharged through the chimney.
SUMMERY OF THE UTILITY MODEL
The utility model provides an simple structure's flue gas reheating system, its aim at reduces or eliminates white plume problem through the flue gas after the heating process dehumidification.
The technical scheme of the utility model as follows:
flue gas reheating system comprises a desulfurizing tower, a chimney arranged at the top of the desulfurizing tower and a flue connected to the desulfurizing tower, and is characterized in that a flue gas condenser is arranged on the flue, a heat dissipation part of a flue gas reheater is arranged in the chimney, the flue gas reheater is positioned in the middle, the upper part or the top of the chimney, the flue gas condenser and the flue gas reheater are internally provided with the same heat transfer medium, and the heat transfer medium is circularly communicated in the flue gas condenser and the flue gas reheater through pipelines.
When the flue gas cooling device is used, flue gas flows into a flue, the flue gas condenser exchanges heat with the flue gas by using a heat transfer medium with lower temperature, the temperature of the flue gas is reduced, water vapor in the flue gas is condensed, latent heat is released, meanwhile, the temperature of the heat transfer medium in the flue gas condenser is increased, the heat transfer medium is conveyed into a flue gas reheater to exchange heat with the flue gas subjected to dehumidification treatment, and then the heat transfer medium which completes heat exchange flows back into the flue gas condenser from the flue gas reheater by means of gravity to cool the flue gas passing through the flue again.
Therefore, the flue is provided with the flue gas condenser to exchange heat with flue gas (for example, saturated wet flue gas), water vapor in the condensed flue gas forms liquid drops when part of condensed water passes through the desulfurizing tower, the humidity of the flue gas is reduced, and the phenomenon of white smoke plume is reduced. In other words, the flue gas reheating system makes full use of the self heat source, and achieves the technical effect of reducing or eliminating the white smoke plume from two dimensions of dehumidifying the flue gas and heating the dehumidified flue gas.
In addition, because the flue gas reheater is positioned in the middle part, the upper part or the top part of the chimney, the cooled cooling medium in the flue gas reheater can naturally flow back to the flue gas condenser by means of gravity without consuming extra energy.
In a preferred embodiment, the heat transfer medium is a liquid heat transfer medium or a phase-change heat transfer medium, the heat transfer medium outlet of the flue gas condenser is connected to the heat transfer medium inlet of the flue gas reheater, the heat transfer medium outlet of the flue gas reheater is connected to the heat transfer medium inlet of the flue gas condenser, a pipeline connecting the heat transfer medium inlet of the flue gas reheater and the heat transfer medium outlet of the flue gas reheater forms the heat dissipation portion, and an circulation pump is disposed only on a pipeline through which the flue gas condenser conveys the heat transfer medium to the flue gas reheater.
Because the flue gas reheater sets up at the middle part of chimney, upper portion or top, consequently, only need set up the circulating pump at sides of carrying the heat transfer medium from the flue gas condenser to the flue gas reheater, and need not set up the circulating pump at sides of carrying the heat transfer medium from the flue gas reheater to the flue gas condenser, the circulating pump that the unilateral was set up can upwards carry the heat transfer medium of heat absorption in the flue gas condenser to flue gas reheater department, carry out the heat transfer at flue gas reheater and the flue gas that passes through cooling dehumidification processing, the heat transfer medium after the cooling flows back to the flue gas condenser under this circulating pump and gravity combined action, absorb heat again.
In a preferred embodiment, the flue gas condenser and the flue gas reheater form a gravity heat pipe heat exchange system, the flue gas condenser includes an evaporation section of each gravity heat pipe, the flue gas reheater includes a condensation section of each gravity heat pipe, the evaporation section and the condensation section of each gravity heat pipe are connected by a heat insulation pipeline, and the condensation section forms the heat dissipation portion; the heat transfer medium is a phase change heat transfer medium.
The utility model discloses in, combine flue gas condenser and flue gas reheater organically, form gravity heat pipe heat transfer system, set up the evaporation zone of gravity heat pipe in the flue gas condenser, after with the flue gas heat transfer, vapor in the flue gas is got off by the condensation, release latent heat, and simultaneously, coolant is heated the evaporation, and take away the heat, this heat is mainly coolant's evaporation latent heat, the condensation zone of the coolant flow direction gravity heat pipe of evaporation condenses into liquid, emit latent heat simultaneously, afterwards, under the effect of gravity, coolant liquid flows back in the flue gas condenser, flow back the evaporation zone of gravity heat pipe promptly.
In the recommended embodiment, the flue gas condenser is arranged on the flue before the inlet of the desulfurizing tower, and the structure is convenient for recovering condensed water in the flue gas and improves the economic benefit.
In the present invention, different mixed materials can be selected or the mixture ratio of the mixed materials can be changed according to the requirements of different phase transition temperatures or heat transfer efficiencies.
In a preferred embodiment, the heat transfer medium is selected from water, propanol or freon R134a, and the like.
In a preferred embodiment, the mixed substance is freon R407C or the like.
In a preferred embodiment, the evaporator end and the condenser end of each gravity heat pipe are each connected by the insulated conduit.
In a recommended embodiment, the evaporation section of each gravity heat pipe is longitudinally arranged, the cooling medium outlet at the top of each gravity heat pipe is connected with the cooling medium inlet of the th heat insulation buffer tank which is horizontally arranged, the cooling medium outlet of the th heat insulation buffer tank is connected with the cooling medium inlet of the second heat insulation buffer tank which is longitudinally arranged through the heat insulation pipeline, and the cooling medium outlet of the second heat insulation buffer tank is connected with the condensation section of each gravity heat pipe which is horizontally arranged.
Drawings
FIG. 1 is a schematic structural diagram of embodiment I.
FIG. 2 is a schematic structural diagram of example II.
Detailed Description
The following describes embodiments of the present invention with reference to the drawings.
Example I
kinds of flue gas reheating system, including desulfurizing tower 7, install chimney 2 at desulfurizing tower 7 top and connect the flue 1 on desulfurizing tower 7, be provided with flue gas condenser 3 on the flue 1, be provided with the heat dissipation part of flue gas reheater 4 within the chimney 2, flue gas reheater 4 is located the upper portion of chimney 2.
The desulfurizing tower 2 is arranged on the ground, and a flue gas condenser 3 is arranged on the flue 1 close to the front of the inlet of the desulfurizing tower 2 so as to facilitate the recovery of condensed water in flue gas.
The same heat transfer medium is arranged in the flue gas condenser 3 and the flue gas reheater 4, the heat transfer medium outlet of the flue gas condenser 3 is connected with the heat transfer medium inlet of the flue gas reheater 4 through the pipeline 5, the heat transfer medium outlet of the flue gas reheater 4 is connected with the heat transfer medium inlet of the flue gas condenser 3 through the pipeline 5, the pipeline connecting the heat transfer medium inlet of the flue gas reheater 4 and the heat transfer medium outlet of the flue gas reheater 4 forms the heat dissipation part of the flue gas reheater 4, the circulating pump is arranged on the pipeline only for conveying the heat transfer medium to the flue gas reheater 4 through the flue gas condenser 3, the circulating pump is not arranged on the pipeline at the side for conveying the heat transfer medium to the flue gas reheater 3 from the flue gas reheater 4, and the heat transfer medium is circularly communicated in the flue gas condenser.
In this example, freon R134a was used as the heat transfer medium.
In this embodiment, the relative humidity of the flue gas to be treated is 60% to 100%. Flue gas with relative humidity of 60% -100% can release more latent heat in the heat exchange process, and is easier to generate white smoke plume problems, so that after the flue gas is treated by the flue gas reheating system, more remarkable technical effects can be generated.
When the flue gas cooling device is used, flue gas to be treated flows into the flue 1, the flue gas condenser 3 cools the flue gas by using a heat transfer medium with lower temperature, the temperature of the flue gas is reduced, water vapor in the flue gas is condensed (part of condensed water drops when passing through a desulfurizing tower), latent heat is released, meanwhile, the temperature of the heat transfer medium in the flue gas condenser 3 is increased, the heat transfer medium is conveyed into the flue gas reheater 4 to exchange heat with the flue gas subjected to dehumidification treatment, and then the heat transfer medium which completes heat exchange flows back into the flue gas condenser 3 from the flue gas reheater 4 by means of gravity and a circulating pump to cool the flue gas passing through the flue 1 again.
Example II
flue gas reheating system, including desulfurizing tower 7a, install chimney 2a at desulfurizing tower 7a top and connect the flue 1a on desulfurizing tower 7a, be provided with flue gas condenser 3a on the flue 1a, be provided with the heat dissipation part of flue gas reheater 4a within the chimney 2a, flue gas reheater 4a is located the upper portion of chimney 2 a.
The desulfurizing tower 2a is arranged on the ground, and a flue gas condenser 3a is arranged on a flue 1a in front of the inlet of the desulfurizing tower 2a so as to facilitate the recovery of condensed water in flue gas.
The flue gas condenser comprises a flue gas condenser 3a, a plurality of gravity heat pipes 6, evaporation sections 61 of the gravity heat pipes 6 are arranged in the flue gas condenser 3a, and condensation sections 62 of the gravity heat pipes are arranged in the flue gas reheater 4 a. the evaporation sections 61 of the gravity heat pipes 6 are longitudinally arranged, a cooling medium outlet at the top of the evaporation sections are correspondingly connected with a plurality of cooling medium inlets of a heat insulation buffer tank 64 which is horizontally arranged, a cooling medium outlet of the heat insulation buffer tank 64 is connected with a cooling medium inlet of a second heat insulation buffer tank 65 which is longitudinally arranged through a heat insulation pipeline 63, a plurality of cooling medium outlets are arranged on the second heat insulation buffer tank 65, is correspondingly connected with the condensation sections 62 of the gravity heat pipes which are horizontally arranged, and the condensation sections 62 form a heat dissipation part of the flue gas.
In this embodiment, each gravity assisted heat pipe 6 uses freon R407C as a heat transfer medium.
In this embodiment, the relative humidity of the flue gas to be treated is 60% to 100%. The relative humidity of 60-100% can release more latent heat in the heat exchange process, and is easier to generate white smoke plume problems, and after the smoke is treated by the smoke reheating system, more remarkable technical effects can be generated.
During the use, the flue gas that awaits processing flows into flue 1a, evaporation zone 61 of gravity heat pipe 6 is after the heat transfer with the flue gas, and the vapor in the flue gas is condensed (partial comdenstion water drips when passing through the desulfurizing tower), releases latent heat, and simultaneously, the cooling medium is heated the evaporation, and takes away the heat, and this heat is the evaporation latent heat of cooling medium, and the cooling medium of evaporation flows to condensation zone 62 of gravity heat pipe 6 and condenses into liquid, emits latent heat simultaneously, and later, under the effect of gravity, in the evaporation zone 61 of gravity heat pipe 6 is returned to the cooling medium liquid.
The above-mentioned be the utility model discloses a concrete implementation way, nevertheless the utility model discloses a design concept is not limited to this, and the ordinary use of this design is right the utility model discloses carry out immaterial change, all should belong to the act of infringement the protection scope of the utility model.
Claims (9)
- The flue gas reheating system comprises a desulfurization tower, a chimney and a flue, wherein the chimney is installed at the top of the desulfurization tower, the flue is connected to the desulfurization tower, and the flue is characterized in that a flue gas condenser is arranged on the flue, a heat dissipation part of a flue gas reheater is arranged in the chimney, the flue gas reheater is located in the middle, the upper part or the top of the chimney, the flue gas condenser and the flue gas reheater are internally provided with the same heat transfer medium, and the heat transfer medium is circularly communicated in the flue gas condenser and the flue gas reheater through pipelines.
- 2. The kinds of flue gas reheating systems of claim 1, wherein the heat transfer medium is a liquid heat transfer medium or a phase-change heat transfer medium, the heat transfer medium outlet of the flue gas condenser is connected with the heat transfer medium inlet of the flue gas reheater, the heat transfer medium outlet of the flue gas reheater is connected with the heat transfer medium inlet of the flue gas condenser, a pipeline connecting the heat transfer medium inlet of the flue gas reheater and the heat transfer medium outlet of the flue gas reheater forms the heat dissipation portion, and a circulating pump is arranged on a pipeline only for conveying the heat transfer medium from the flue gas condenser to the flue gas reheater.
- 3. The flue gas reheating system of claim 1, wherein the flue gas condenser and the flue gas reheater form a gravity heat pipe heat exchange system, the flue gas condenser comprises an evaporation section of each gravity heat pipe, the flue gas reheater comprises a condensation section of each gravity heat pipe, the evaporation section and the condensation section of each gravity heat pipe are connected through a heat insulation pipeline, the condensation section forms the heat dissipation section, and the heat transfer medium is a phase change heat transfer medium.
- 4. The flue gas reheating system of claim 1, 2 or 3, wherein the flue gas condenser is disposed on the flue near the inlet of the desulfurizing tower.
- 5. The flue gas reheating systems of claim 1, 2 or 3, wherein the heat transfer medium is a single pure substance or a mixture of substances.
- 6. The flue gas reheating system of claim 5, wherein the heat transfer medium is selected from water, propanol or Freon R134 a.
- 7. The flue gas reheating systems of claim 5, wherein the mixed material is Freon R407C.
- 8. The flue gas reheating system of claim 3, wherein the evaporator section and the condenser section of each gravity assisted heat pipe are each connected by the insulated piping.
- 9. The flue gas reheating system of claim 3, wherein the evaporation section of each gravity heat pipe is arranged longitudinally, the cooling medium outlet at the top of each gravity heat pipe is connected with the cooling medium inlet of a heat insulation buffer tank arranged horizontally, the cooling medium outlet of the heat insulation buffer tank is connected with the cooling medium inlet of a second heat insulation buffer tank arranged longitudinally through the heat insulation pipeline, and the cooling medium outlet of the second heat insulation buffer tank is connected with the condensation section of each gravity heat pipe arranged horizontally.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920680833.5U CN209997229U (en) | 2019-05-13 | 2019-05-13 | flue gas reheating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920680833.5U CN209997229U (en) | 2019-05-13 | 2019-05-13 | flue gas reheating system |
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| CN209997229U true CN209997229U (en) | 2020-01-31 |
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| CN201920680833.5U Active CN209997229U (en) | 2019-05-13 | 2019-05-13 | flue gas reheating system |
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| CN (1) | CN209997229U (en) |
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- 2019-05-13 CN CN201920680833.5U patent/CN209997229U/en active Active
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