CN103406018A - Method for recycling waste gas of thermal power plant - Google Patents
Method for recycling waste gas of thermal power plant Download PDFInfo
- Publication number
- CN103406018A CN103406018A CN2013103786929A CN201310378692A CN103406018A CN 103406018 A CN103406018 A CN 103406018A CN 2013103786929 A CN2013103786929 A CN 2013103786929A CN 201310378692 A CN201310378692 A CN 201310378692A CN 103406018 A CN103406018 A CN 103406018A
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- CN
- China
- Prior art keywords
- temperature
- waste gas
- reducing tower
- gypsum
- tower
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
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- Treating Waste Gases (AREA)
Abstract
The invention discloses a method for recycling waste gas of a thermal power plant. The method specifically comprises the following steps: 1. conveying smoke into a cooling tower to cool through a ventilation pipe; 2. feeding vapor in the cooling tower into a turbine generator special for the step to provide electric energy for a water pump; 3. introducing cooled waste gas into an absorbing tower, and meanwhile, pumping limestone powder, and adding water to prepare an absorbent of slurry, wherein the produced calcium sulfate is saturated and crystallized to form dihydrate gypsum; 4. condensing and dehydrating the gypsum slurry which is removed from the produced dihydrate gypsum through the absorbing tower and conveying the gypsum slurry to a gypsum bin through a conveyer to stack; 5. removing fog drips of desulfurized smoke through a demister, heating through a heat exchanger, then introducing the smoke into the cooling tower to cool and then discharging into the atmosphere. According to the method, the problem that the atmospheric temperature is raised by emission of waste heat into the atmosphere during treatment of the waste gas of the thermal power plant is solved.
Description
Technical field
The present invention relates to the energy-conserving and environment-protective field that a kind of waste gas is recycled, concrete, relate to the method that a kind of thermal power plant waste gas is recycled.
Technical background
The waste gas of coal-burning power plant is mainly derived from the middle grey storehouse exhaust of flue gas, pneumatic ash transmitting system of boiler combustion generation and the dust-laden exhaust gas that coal yard produces, and coal yard, raw coal fragmentation and coal are carried the coal dust produced, wherein, exhaust gas volumn and contained pollutant discharge amount that boiler combustion produces are far longer than other waste gas, and this is the emphasis of pollution control.Pollutant in the flue gas that boiler combustion produces has flying dust, SO
2, NO
X, CO
2, a small amount of fluoride and chloride, their shared ratio depends on that the mineral matter in coal forms, major pollutants are flying dust, coal dust, SO
2And NO
XThe smoke discharge amount that boiler combustion produces is large, and delivery temperature is high.
Summary of the invention
For problem recited above, the present invention proposes the method that a kind of thermal power plant waste gas is recycled.
The method that a kind of thermal power plant waste gas is recycled, its concrete method step comprises:
1, flue gas is delivered in temperature-reducing tower and lowered the temperature by breather pipe.Temperature-reducing tower is comprised of two-layer, and wherein the nexine of temperature-reducing tower is made by the metal material that thermal conductivity is good and corrosion-resistant, fusing point is high, and be used to filling recirculated water, skin is that the material of and corrosion-resistant and high-temperature resistant good by thermal insulation is made, for logical waste gas.The waste gas here and recirculated water isolation, the opposite direction that it flows, water (flow) direction is from bottom to top, and it is to provide kinetic energy by water pump, and waste gas is from top to bottom.
2, in temperature-reducing tower, steam enters in the steam turbine generator of this link special use, for water pump provides electric energy.Utilize the waste heat in waste gas to lower the temperature voluntarily to waste gas here, saved the energy from other, improved simultaneously follow-up desulfuration efficiency.
3, the waste gas after cooling is passed in absorption tower, pumps into simultaneously agstone and add the absorbent that water is made slurries, the calcium sulfate saturated crystallization of generation forms dihydrate gypsum.
The gypsum slurries that the dihydrate gypsum that 4, will generate is got rid of through absorption tower, through thickening, is delivered to gypsum by conveyer and is helped storehouse to stack.
5, the flue gas after desulfurization drips through the demister mist elimination, through the heat exchanger heat temperature raising, then is passed into temperature-reducing tower and lower the temperature and be discharged in atmosphere afterwards.Dust in so further purifying exhaust air, avoided the impact that atmospheric temperature is raise simultaneously on certain degree
The specific embodiment
Below the present invention is specifically described:
The method that a kind of thermal power plant waste gas is recycled, its concrete method step comprises:
1, flue gas is delivered in temperature-reducing tower and lowered the temperature by breather pipe.Temperature-reducing tower is comprised of two-layer, and wherein the nexine of temperature-reducing tower is made by the metal material that thermal conductivity is good and corrosion-resistant, fusing point is high, and be used to filling recirculated water, skin is that the material of and corrosion-resistant and high-temperature resistant good by thermal insulation is made, for logical waste gas.The waste gas here and recirculated water isolation, the opposite direction that it flows, water (flow) direction is from bottom to top, and it is to provide kinetic energy by water pump, and waste gas is from top to bottom.
2, in temperature-reducing tower, steam enters in the steam turbine generator of this link special use, for water pump provides electric energy.Utilize the waste heat in waste gas to lower the temperature voluntarily to waste gas here, saved the energy from other, improved simultaneously follow-up desulfuration efficiency.
3, the waste gas after cooling is passed in absorption tower, pumps into simultaneously agstone and add the absorbent that water is made slurries, the calcium sulfate saturated crystallization of generation forms dihydrate gypsum.
The gypsum slurries that the dihydrate gypsum that 4, will generate is got rid of through absorption tower, through thickening, is delivered to gypsum by conveyer and is helped storehouse to stack.
5, the flue gas after desulfurization drips through the demister mist elimination, through the heat exchanger heat temperature raising, then is passed into temperature-reducing tower and lower the temperature and be discharged in atmosphere afterwards.Dust in so further purifying exhaust air, avoided the impact that atmospheric temperature is raise simultaneously on certain degree.
Here, temperature-reducing tower in step 1 is that waste gas is lowered the temperature, improve the stable and efficiency of the chemistry reflection of back, the temperature-reducing tower in step 5 is the waste gas cooling after purifying by the heat exchanger heat temperature raising, avoids waste heat discharge to raise to the atmospheric temperature caused in atmosphere.
Claims (3)
1. method that thermal power plant waste gas is recycled, its concrete method step comprises: 1, flue gas is delivered in temperature-reducing tower and lowered the temperature by breather pipe.2, in temperature-reducing tower, steam enters in the steam turbine generator of this link special use, for water pump provides electric energy.3, the waste gas after cooling is passed in absorption tower, pumps into simultaneously agstone and add the absorbent that water is made slurries, the calcium sulfate saturated crystallization of generation forms dihydrate gypsum.The gypsum slurries that the dihydrate gypsum that 4, will generate is got rid of through absorption tower, through thickening, is delivered to gypsum by conveyer and is helped storehouse to stack.5, the flue gas after desulfurization drips through the demister mist elimination, through the heat exchanger heat temperature raising, then is passed into temperature-reducing tower and lower the temperature and be discharged in atmosphere afterwards.
2. the temperature-reducing tower in step 1 and step 5 wherein according to claim 1.Temperature-reducing tower is comprised of two-layer, and wherein the nexine of temperature-reducing tower is made by the metal material that thermal conductivity is good and corrosion-resistant, fusing point is high, and be used to filling recirculated water, skin is that the material of and corrosion-resistant and high-temperature resistant good by thermal insulation is made, for logical waste gas.The waste gas here and recirculated water isolation, the opposite direction that it flows, water (flow) direction is from bottom to top, and it is to provide kinetic energy by water pump, and waste gas is from top to bottom.
3. according to claim 1, the temperature-reducing tower in step 1 and step 5 wherein, temperature-reducing tower in step 1 is that waste gas is lowered the temperature, improve the stable and efficiency of the chemistry reflection of back, temperature-reducing tower in step 5 is the waste gas cooling after purifying by the heat exchanger heat temperature raising, avoids waste heat discharge to raise to the atmospheric temperature caused in atmosphere.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103786929A CN103406018A (en) | 2013-08-27 | 2013-08-27 | Method for recycling waste gas of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013103786929A CN103406018A (en) | 2013-08-27 | 2013-08-27 | Method for recycling waste gas of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103406018A true CN103406018A (en) | 2013-11-27 |
Family
ID=49599087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013103786929A Pending CN103406018A (en) | 2013-08-27 | 2013-08-27 | Method for recycling waste gas of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103406018A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289232A (en) * | 2015-10-23 | 2016-02-03 | 深圳市广鸿海建筑工程有限公司 | Equipment capable of preparing gypsum while performing desulfurizing |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058230A (en) * | 1983-09-09 | 1985-04-04 | Babcock Hitachi Kk | Waste gas desulfurization and apparatus thereof |
| CN101898086A (en) * | 2010-06-25 | 2010-12-01 | 无锡迅德环保科技有限公司 | Power-generation and denitrification integrated device by residual heat of glass furnace and method thereof |
| CN102363095A (en) * | 2011-09-16 | 2012-02-29 | 莫沙纱 | Dry flue gas desulfurization process method and dry flue gas desulfurization system thereof |
-
2013
- 2013-08-27 CN CN2013103786929A patent/CN103406018A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6058230A (en) * | 1983-09-09 | 1985-04-04 | Babcock Hitachi Kk | Waste gas desulfurization and apparatus thereof |
| CN101898086A (en) * | 2010-06-25 | 2010-12-01 | 无锡迅德环保科技有限公司 | Power-generation and denitrification integrated device by residual heat of glass furnace and method thereof |
| CN102363095A (en) * | 2011-09-16 | 2012-02-29 | 莫沙纱 | Dry flue gas desulfurization process method and dry flue gas desulfurization system thereof |
Non-Patent Citations (1)
| Title |
|---|
| 望亭发电厂: "《660MW超超临界火力发电机组培训教材.脱硫脱硝分册》", 30 September 2011, article "石灰石-石膏湿法烟气脱硫工艺" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105289232A (en) * | 2015-10-23 | 2016-02-03 | 深圳市广鸿海建筑工程有限公司 | Equipment capable of preparing gypsum while performing desulfurizing |
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| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
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Application publication date: 20131127 |