CN209893366U - Steam-water circulating system for waste incineration power generation - Google Patents
Steam-water circulating system for waste incineration power generation Download PDFInfo
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- CN209893366U CN209893366U CN201920224833.4U CN201920224833U CN209893366U CN 209893366 U CN209893366 U CN 209893366U CN 201920224833 U CN201920224833 U CN 201920224833U CN 209893366 U CN209893366 U CN 209893366U
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Abstract
The utility model relates to a steam-water circulation system for msw incineration electricity generation. The utility model discloses a congeal the pump, with the feedwater heater who congeals the pump connection, the steam oxygen-eliminating device with the feedwater heater connection, with steam oxygen-eliminating device exit linkage's water-feeding pump, with the msw incineration boiler of water-feeding pump exit linkage, with the reheat over heater of msw incineration boiler main steam exit linkage, with the steam turbine of reheat over heater exit linkage, with the condenser of steam turbine steam exit linkage, it is connected with the condenser export to congeal the pump entry, the reheat over heater, the feedwater heater sets firmly in the biogas heating furnace flue, still include the oxygen evaporator that removes that is connected with the steam oxygen-eliminating device, the oxygen evaporator sets firmly in the biogas heating furnace flue. The utility model has the advantages of reasonable system configuration, high output and generating efficiency of the steam turbine, economic operation of the methane heating furnace and the like.
Description
Technical Field
The utility model relates to a steam-water circulation system for msw incineration power generation belongs to power plant boiler equipment technical field.
Background
With the continuous improvement of the Chinese urbanization level and the continuous increase of urban domestic garbage, the garbage incineration boiler is produced and widely applied to the field of thermal power generation. Because chloride salts contained in flue gas generated by waste incineration can cause high-temperature corrosion (an active region of the high-temperature corrosion is 400-600 ℃), the temperature of superheated steam of the waste incineration waste heat boiler is usually designed below 450 ℃, and when main steam below 450 ℃ is used for power generation, the output of a steam turbine and the power generation efficiency are lower. In order to improve the output and the generating efficiency of the steam turbine and simultaneously avoid the high-temperature corrosion of the heating surface of the waste incineration exhaust-heat boiler, the prior solution is as follows: and a biogas heating furnace for secondarily heating the main steam is arranged outside the waste incineration waste heat boiler, and the heated surface of the biogas heating furnace secondarily heats the main steam. When the steam-water circulation system (as shown in figure 1) composed of a waste incineration waste heat boiler, a methane heating furnace and a steam turbine operates, 450 ℃ superheated steam generated by heating feed water by the waste incineration boiler 5 is secondarily heated by a secondary heating superheater 6 fixed in a flue of the methane heating furnace 9, main steam is heated for the second time and then is heated to be higher than 480 ℃ and then is sent to the steam turbine 7 so as to improve the output and the power generation efficiency of the steam turbine 7, the steam after acting becomes condensed water in a condenser 8 and returns to a condensate pump 1, a feed water heater 2 and a steam deaerator 3 are arranged at the front end of a feed water inlet of the waste incineration boiler 5, the feed water heater 2 and the steam deaerator 3 provide heat sources by the steam turbine 7, feed water (condensed water and supplemented water) from the condensate pump 1 is heated by the feed water heater 2 and deaerated by the steam deaerator 3 and then is sent to the waste incineration boiler 5, the temperature of the feed water heated by the feed water heater 2 and deaerated by the steam deaerator 3 is not lower than 130 ℃ so as to avoid low-temperature corrosion of the heating surface of the low-temperature section of the waste incineration boiler 5.
Although the steam-water circulating system effectively solves the technical problems of low turbine output and low power generation efficiency caused by low temperature of main steam when used for waste incineration power generation, the steam-water circulating system also has the following defects:
1. the feed water heater 2 and the steam deaerator 3 need to extract steam from the steam turbine 7 as a heat source for feed water deaerating and heating, reducing the output and the power generation efficiency of the steam turbine 7.
2. The exhaust gas temperature of the biogas heating furnace is as high as 400 ℃, which causes energy waste.
Disclosure of Invention
The utility model discloses mainly the steam turbine that solves prior art existence is exerted oneself and the uneconomical technical defect of the higher operation of generating efficiency is lower, biogas heating furnace exhaust gas temperature, provides a steam-water circulation system that is used for the msw incineration electricity generation that the steam turbine is exerted oneself and generating efficiency is higher, the lower operation of biogas heating furnace exhaust gas temperature is more economical.
The utility model discloses to above-mentioned technical problem mainly can solve through following technical scheme: the utility model discloses a congeal the pump, the inlet with congeal the water heater of pump exit linkage, entry and water heater exit linkage's steam oxygen-eliminating device, entry and steam oxygen-eliminating device exit linkage's water-feeding pump, water inlet and water pump exit linkage's waste incineration boiler, entry and waste incineration boiler main steam exit linkage's reheat over heater, steam inlet and reheat over heater exit linkage's steam turbine, entry and steam turbine steam exit linkage's condenser, the marsh gas heating furnace, it is connected with the condenser export to congeal the pump inlet, the reheat over heater sets firmly in marsh gas heating furnace flue, a serial communication port: the device also comprises a deoxygenation evaporator connected with the steam deaerator, and the deoxygenation evaporator and the feed water heater are fixedly arranged in the flue of the methane heating furnace.
Preferably, the steam deaerator comprises a deaerating head, a steam drum with an inlet connected with an outlet of the deaerating head, wherein the inlet of the deaerating head is connected with an outlet of the feed water heater, an outlet of the steam drum is connected with an inlet of the feed water pump, the deaerating evaporator is connected with the steam drum, feed water in the steam drum exchanges heat with flue gas through the deaerating evaporator, and heat circulation is formed between the steam drum and the deaerating evaporator.
Preferably, the secondary heating superheater is positioned at the high-temperature section of the flue of the methane heating furnace, the feed water heater is positioned at the low-temperature section of the flue of the methane heating furnace, and the oxygen removal evaporator is positioned between the feed water heater and the secondary heating superheater.
Therefore, the utility model discloses simple structure, the configuration is reasonable, has following advantage:
the utility model discloses in, the feedwater heater sets up in the biogas heating furnace flue, and the feedwater heater improves the feedwater temperature through the flue gas heat transfer with in the flue, still sets up the oxygen removal evaporimeter in the flue and provides the deoxidization heat source for the steam oxygen-eliminating device to avoided feedwater heater and steam oxygen-eliminating device to need follow the steam turbine and extract the high-quality steam as the heat source of feedwater deoxidization and intensification, realized exerting oneself of steam turbine and generating efficiency's improvement.
The utility model discloses in, except that oxygen evaporator and feed water heater arrange in marsh gas heating furnace flue, through except that the flue gas heat transfer in oxygen evaporator and feed water heater and the flue, make flue gas temperature greatly reduced, marsh gas heating furnace's exhaust gas temperature can fall to about 80 ℃ at least to improve energy utilization greatly, promoted the economic nature of marsh gas heating furnace operation.
The utility model discloses an among the preferred scheme, the steam oxygen-eliminating device includes deoxidization head and steam pocket, and the deoxidization evaporimeter is connected with the steam pocket, and the steam pocket is got back to after feedwater entering deoxidization evaporimeter and flue gas heat transfer in the steam pocket, and feedwater forms thermal cycle and produces steam between steam pocket and deoxidization evaporimeter in the steam pocket, and steam rises to the deoxidization head and is used for the deoxidization, and the feedwater that comes from the feedwater heater gets into the steam pocket after through deoxidization head deoxidization, and the msw incineration boiler is sent into to the rethread water supply valve.
Therefore, the utility model discloses compare in prior art, it is simple reasonable to have the system, and the steam turbine is exerted oneself and generating efficiency is high, moves energy-conserving efficient advantage.
Drawings
FIG. 1 is a schematic diagram of the prior art;
fig. 2 is a schematic diagram of a preferred embodiment of the present invention.
Description of reference numerals: 1. a coagulation pump; 2. a feedwater heater; 3. a steam deaerator; 31. an oxygen removal head; 32. a steam drum; 4. a feed pump; 5. a garbage incinerator; 6. a secondary heating superheater; 7. a steam turbine; 8. a condenser; 9. a biogas heating furnace; an oxygen removal evaporator.
Detailed Description
The technical solution of the present invention is further specifically described below by way of examples and with reference to the accompanying drawings.
Example 1: as shown in the attached figure 2, the utility model discloses a congeal pump 1, the entry with congeal pump 1 exit linkage's feed water heater 2, entry and feed water heater 2 exit linkage's steam oxygen-eliminating device 3, entry and the feed water pump 4 of 3 exit linkage of steam oxygen-eliminating device, feed water entry and the msw incineration boiler 5 of 4 exit linkage of feed water pump, entry and the msw incineration boiler 5 main steam exit linkage's secondary heating over heater 6, steam inlet and the steam turbine 7 of 6 exit linkage of secondary heating over heater, entry and the condenser 8 of 7 steam exit linkage of steam turbine, marsh gas heating furnace 9, congeal pump 1 entry and condenser 8 exit linkage, still include the oxygen removal evaporimeter 10 who sets firmly in marsh gas heating furnace 9 flues, oxygen removal evaporimeter 10 is connected with steam oxygen-eliminating device 3;
the secondary heating superheater 6 is fixedly arranged at the high-temperature section of the flue of the methane heating furnace 9;
the feed water heater 2 is positioned at the low-temperature section of a flue of the biogas heating furnace 9, and the oxygen removal evaporator 10 is positioned between the feed water heater 2 and the secondary heating superheater 6;
the steam deaerator 3 comprises a deaerating head 31, a steam pocket 32 with an inlet connected with an outlet of the deaerating head 31, the inlet of the deaerating head 31 is connected with an outlet of the feed water heater 2, and the outlet of the steam pocket 32 is connected with an inlet of the feed water pump 4;
the oxygen removal evaporator 10 is connected with the steam drum 32 through a connecting pipe, and the feed water in the steam drum 32 exchanges heat with the flue gas through the oxygen removal evaporator 10 and forms a heat cycle between the oxygen removal evaporator 10 and the steam drum 32.
When the unit is operated, about 45 ℃ condensed water and supplemented water from a condenser 8 enter a feed water heater 2 through a condensate pump 1, the condensed water and the supplemented water are heated to about 100 ℃ through heat exchange with flue gas, then the heated water enters a deaerating head 31 for deaerating, the deaerated feed water enters a steam drum 32, the feed water in the steam drum 32 is subjected to heat exchange with the flue gas through a deaerating evaporator 10, the temperature is raised to 130 ℃ through heat exchange with the flue gas, steam is generated, the steam in the steam drum 32 rises to the deaerating head 31 for deaerating the feed water, the deaerated and heated feed water is sent to a waste incineration boiler 5 through a feed water pump 4, main steam at 450 ℃ is formed after the waste incineration boiler 5 absorbs heat, the main steam is heated to 480 ~ 540 ℃ through a secondary heating superheater 6 and then sent to a steam turbine 7 for power generation, the steam after power generation forms condensed water through the.
In the running process of the unit, the oxygen removal evaporator 10 and the feed water heater 2 exchange heat with the flue gas in the flue of the biogas heating furnace 9, so that the temperature of the flue gas is greatly reduced, the lowest temperature of the flue gas discharged by the biogas heating furnace 9 can be reduced to about 80 ℃, the energy utilization rate is greatly improved, and the running of the biogas heating furnace 9 is more economical; meanwhile, the feed water heater 2 and the oxygen removal evaporator 10 obtain heat required by feed water temperature rise and oxygen removal through heat exchange with flue gas in the biogas heating furnace 9, so that steam extraction from the steam turbine 7 is avoided, and the output and the power generation efficiency of the steam turbine 7 are improved better.
Of course, the drawings and examples are only for the purpose of illustrating and explaining the present invention and should not be taken as unduly limiting the invention. All the technical solutions obtained by making equivalent adjustments and changes according to the present invention fall within the protection scope of the present invention.
Claims (3)
1. A steam-water circulation system for waste incineration power generation comprises a condensing pump (1), a feed water heater (2) with an inlet connected with an outlet of the condensing pump (1), a steam deaerator (3) with an outlet of the feed water heater (2), a feed water pump (4) with an inlet connected with an outlet of the steam deaerator (3), a waste incineration boiler (5) with an outlet of the feed water pump (4), a secondary heating superheater (6) with an inlet connected with a main steam outlet of the waste incineration boiler (5), a steam turbine (7) with an outlet of the secondary heating superheater (6), a condenser (8) with a steam outlet of the steam turbine (7) and a methane heating furnace (9), wherein the inlet of the condensing pump (1) is connected with an outlet of the steam condenser (8), and the secondary heating superheater (6) is fixedly arranged in a flue of the methane heating furnace (9), the method is characterized in that: the methane heating furnace is characterized by further comprising a deoxygenation evaporator (10) connected with the steam deaerator (3), wherein the deoxygenation evaporator (10) and the feed water heater (2) are fixedly arranged in a flue of the methane heating furnace (9).
2. The steam-water circulation system for waste incineration power generation according to claim 1, characterized in that: steam deaerator (3) include deoxidization head (31), the entry with deoxidization head (31) exit linkage's steam pocket (32), deoxidization head (31) entry with feedwater heater (2) exit linkage, steam pocket (32) export with feedwater pump (4) entry linkage, deoxidization evaporimeter (10) with steam pocket (32) are connected, feedwater passes through in steam pocket (32) deoxidization evaporimeter (10) and flue gas heat transfer and steam pocket (32) with form heat cycle between the deoxidization evaporimeter (10).
3. The steam-water circulation system for waste incineration power generation according to claim 2, characterized in that: the secondary heating superheater (6) is positioned at the high-temperature section of the flue of the biogas heating furnace (9), the feed water heater (2) is positioned at the low-temperature section of the flue of the biogas heating furnace (9), and the oxygen removal evaporator (10) is positioned between the feed water heater (2) and the secondary heating superheater (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920224833.4U CN209893366U (en) | 2019-02-22 | 2019-02-22 | Steam-water circulating system for waste incineration power generation |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920224833.4U CN209893366U (en) | 2019-02-22 | 2019-02-22 | Steam-water circulating system for waste incineration power generation |
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| CN209893366U true CN209893366U (en) | 2020-01-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838776A (en) * | 2019-02-22 | 2019-06-04 | 东方菱日锅炉有限公司 | Steam-water circulation system for waste incineration and generating electricity |
| CN113432110A (en) * | 2021-06-29 | 2021-09-24 | 无锡华光环保能源集团股份有限公司 | Garbage waste heat boiler with external superheater for improving main steam parameters |
-
2019
- 2019-02-22 CN CN201920224833.4U patent/CN209893366U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109838776A (en) * | 2019-02-22 | 2019-06-04 | 东方菱日锅炉有限公司 | Steam-water circulation system for waste incineration and generating electricity |
| CN113432110A (en) * | 2021-06-29 | 2021-09-24 | 无锡华光环保能源集团股份有限公司 | Garbage waste heat boiler with external superheater for improving main steam parameters |
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