CN214536192U - Waste incineration power plant furnace cooling system - Google Patents
Waste incineration power plant furnace cooling system Download PDFInfo
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- CN214536192U CN214536192U CN202120577965.2U CN202120577965U CN214536192U CN 214536192 U CN214536192 U CN 214536192U CN 202120577965 U CN202120577965 U CN 202120577965U CN 214536192 U CN214536192 U CN 214536192U
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Abstract
The utility model relates to a msw incineration power plant furnace cooling system, include: compressed air supply system, industrial water supply system, leachate supply system, medium injection system: including the flue injection subassembly, the flue injection subassembly includes gas side pipeline, water side pipeline, gas side governing valve, water side governing valve and spray gun, and gas side pipeline intercommunication compressed air feed system and spray gun, water side pipeline intercommunication industrial water feed system, filtration liquid feed system and spray gun, gas side governing valve set up on gas side pipeline, and water side governing valve sets up on water side pipeline, and the spray gun is used for stretching into exhaust-heat boiler flue, temperature measurement system. The utility model utilizes the industrial water and the landfill leachate to spray water in a coordinated manner, and reasonably arranges the spray gun position to cool the hearth, thereby effectively solving the problems of coking of the hearth, continuous standard exceeding of NOx emission of a unit and high-temperature corrosion of a heating surface; and the furnace hearth cooling system is suitable for the reconstruction of a furnace hearth cooling system of a power plant which is put into operation, the reconstruction period is effectively shortened, and the reconstruction effect is good.
Description
Technical Field
The utility model belongs to the technical field of msw incineration, especially, relate to a msw incineration power plant furnace cooling system.
Background
Along with the improvement of the living standard of residents and the gradual popularization of garbage classification, the heat value of household garbage is higher and higher, and the situation that the heat value of the household garbage which is fed into a furnace is far higher than the designed heat value of the garbage which is fed into the furnace exists in part of garbage incineration power stations, so that the phenomena that the heat load of a unit reaches a design value and the mechanical load (namely the garbage treatment capacity) is lower than the design value exist in the operation process of the unit; meanwhile, for a waste incineration power station, the waste treatment capacity is a key index of the operation of the waste incineration power station. In order to complete the indexes of the garbage treatment capacity, the unit inevitably runs under the condition of super heat load, and the following three problems exist: 1. coking of a boiler hearth is serious; 2. the furnace temperature is too high, the NOx emission of the unit continuously exceeds the standard, and the unit can only be operated by reducing the load; 3. the high-temperature corrosion of the heated surface (water-cooled wall and superheater) of the boiler is serious, and the phenomenon of tube explosion is easy to occur.
The Chinese patent application with the publication number of CN110701620A discloses a water spray cooling system of a garbage incinerator and an automatic control method thereof, which comprises the steps of arranging thermocouples at an outlet of the incinerator and an inlet of a high-temperature superheater at the same time; the novel two-fluid spray gun is arranged at the outlet position of the incinerator and used for cooling the hearth through industrial water spraying; and controlling the back-spraying flow of the industrial water through DCS logical operation. However, the patent has the following disadvantages: 1. only one water source of industrial water is used as a means for cooling the hearth, so that the cost is high, and if the hearth is cooled by the cooperation of the industrial water and the landfill leachate, the cost can be saved; 2. the two-fluid spray gun is only arranged on the left side wall and the right side wall of the outlet of the incinerator, and the temperature drop of the flue gas in the hearth is small.
In addition, in the industry, a case that a hearth water spray cooling system is newly added in a delivered waste incineration generator set at present, particularly a delivered waste incineration power station, and because the system is not added in the later period during design, the constraint problems of operation optimization such as the main facilities of waste incineration, the collaborative spraying of industrial water and leachate and the like exist.
In summary, a system for cooling a hearth and optimizing the arrangement of a spray gun by cooperatively spraying industrial water and landfill leachate and a method for performing related transformation on the existing garbage power station are needed.
Disclosure of Invention
The utility model aims at providing a msw incineration power plant furnace cooling system.
In order to achieve the above purpose, the utility model adopts the technical scheme that:
a waste incineration power plant furnace cooling system includes:
a compressed air supply system for providing compressed air,
an industrial water supply system for supplying industrial water,
a percolate supply system for supplying percolate,
the medium injection system is used for injecting a medium to a flue of the waste heat boiler and comprises a flue injection assembly, the flue injection assembly comprises a gas side pipeline, a water side pipeline, a gas side regulating valve, a water side regulating valve and a spray gun, the gas side pipeline is communicated with the compressed air supply system and the spray gun, the water side pipeline is communicated with the industrial water supply system, the percolate supply system and the spray gun, the gas side regulating valve is arranged on the gas side pipeline, the water side regulating valve is arranged on the water side pipeline, and the spray gun is used for extending into the flue of the waste heat boiler,
the temperature measuring system comprises a first temperature measuring component and a second temperature measuring component, wherein the first temperature measuring component is used for measuring the temperature of smoke at the outlet of the flue of the waste heat boiler, and the second temperature measuring component is used for measuring the temperature of smoke at the inlet of the superheater.
Preferably, the medium injection system comprises a first medium injection system, a second medium injection system and a third medium injection system, the first medium injection system is used for injecting a medium to a first flue of the waste heat boiler, the second medium injection system is used for injecting a medium to a second flue of the waste heat boiler, and the third medium injection system is used for injecting a medium to a third flue of the waste heat boiler.
Further preferably, the first medium injection system comprises a first on-flue medium injection system and a first off-flue medium injection system, and the first on-flue medium injection system and the first off-flue medium injection system are arranged up and down.
Further preferably, the spray guns of the first medium injection system and the third medium injection system are horizontally arranged in a downward inclined manner; and the spray gun of the second medium injection system is horizontally arranged upwards in an inclined mode.
Further preferably, the inclination angles of the spray guns of the first medium injection system, the second medium injection system and the third medium injection system are 10-20 degrees.
Preferably, the flue injection assembly further comprises a flow meter, and the flow meter is arranged on the water side pipeline; further preferably, the flow meter is an electromagnetic flow meter.
Preferably, the compressed air supply system comprises a compressed air storage tank, a compressed air pipeline and a pressure gauge, the compressed air pipeline is communicated with the compressed air storage tank and the air side pipeline, and the pressure gauge is arranged on the compressed air pipeline.
Further preferably, the outlet pressure of the compressed air storage tank is 0.3MPa-0.5 MPa.
Preferably, the industrial water supply system comprises an industrial water tank, an industrial water pipeline, a back-spray pump and a water tank regulating valve, wherein the industrial water tank is provided with a liquid level meter, the industrial water pipeline is communicated with the industrial water tank and the water side pipeline, and the back-spray pump and the water tank regulating valve are arranged on the industrial water pipeline.
Preferably, the percolate supply system comprises a percolate tank, a percolate pipeline, a back-spraying pump and a percolate regulating valve, wherein the percolate tank is provided with a liquid level meter, the percolate pipeline is communicated with the percolate tank and the water side pipeline, and the back-spraying pump and the percolate regulating valve are arranged on the percolate pipeline.
Further preferably, the outlet pressure of the back-injection pump is 0.3MPa-0.5 MPa.
Preferably, the material of the spray gun nozzle is hastelloy.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the utility model utilizes the industrial water and the landfill leachate to spray water in a coordinated manner, and reasonably arranges the spray gun position to cool the hearth, thereby effectively solving the problems of coking of the hearth, continuous exceeding of NOx emission of a unit, and high-temperature corrosion of a heating surface (a water-cooled wall and a superheater); and the furnace hearth cooling system is suitable for the reconstruction of a furnace hearth cooling system of a power plant which is put into operation, the reconstruction period is effectively shortened, and the reconstruction effect is good.
Drawings
FIG. 1 is a schematic structural diagram of the present embodiment;
fig. 2 is a schematic diagram of the distribution of the medium injection system on the waste heat boiler in the embodiment.
Wherein:
1. a compressed air supply system; 10. a compressed air storage tank; 11. a compressed air line; 12. a pressure gauge; 2. an industrial water supply system; 20. an industrial water tank; 200. a liquid level meter; 21. an industrial water pipeline; 22. a back-spray pump; 23. a water tank regulating valve; 3. a percolate supply system; 30. a percolate tank; 300. a liquid level meter; 31. a percolate line; 32. a back-spray pump; 33. a percolate regulating valve; 34. a blow-off pipe; 35. a blowoff valve; 4. a media ejection system; 40. a gas side pipeline; 41. a water side pipeline; 42. a gas side regulating valve; 43. a water side regulating valve; 44. a spray gun; 45. a flow meter; 50. a first flue of the waste heat boiler; 51. a second flue of the waste heat boiler; 52. a third flue of the waste heat boiler; 53. a horizontal flue of the waste heat boiler; 60. a first temperature measuring component; 61. and a second temperature measuring component.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a waste incineration power station furnace cooling system comprises a compressed air supply system 1, an industrial water supply system 2, a percolate supply system 3, a medium injection system 4 and a temperature measurement system, wherein:
the compressed air supply system 1 is used for supplying compressed air and comprises a compressed air storage tank 10, a compressed air pipeline 11 and a pressure gauge 12, wherein the compressed air pipeline 11 is communicated with the compressed air storage tank 10 and the medium injection system 4, and the pressure gauge 12 is arranged on the compressed air pipeline 11. In this embodiment: the outlet pressure of the compressed air storage tank is 0.3MPa-0.5 MPa.
The industrial water supply system 2 is used for supplying industrial water, and comprises an industrial water tank 20, an industrial water pipeline 21, a back-spray pump 22 and a water tank regulating valve 23, wherein the industrial water tank 20 is provided with a liquid level meter 200, the industrial water pipeline 21 is communicated with the industrial water tank 20 and the medium injection system 4, and the back-spray pump 22 and the water tank regulating valve 23 are arranged on the industrial water pipeline 20. In this embodiment: the two tank regulating valves 23 are respectively positioned upstream and downstream of the back-spray pump 22.
The percolate supply system 3 is used for providing percolate and comprises a percolate tank 30, a percolate pipeline 31, a back-spraying pump 32 and a percolate regulating valve 33, wherein the percolate tank 30 is provided with a liquid level meter 300, the percolate pipeline 31 is communicated with the percolate tank 30 and a medium spraying system 4, and the back-spraying pump 32 and the percolate regulating valve 33 are arranged on the percolate pipeline 31. In this embodiment: the outlet pressure of the back-spraying pump 32 is 0.3MPa-0.5MPa, and two percolate adjusting valves 33 are arranged and are respectively positioned at the upstream and the downstream of the back-spraying pump 32. In addition, the percolate supply system 3 further comprises a drain pipe 34 and a drain valve 35, wherein the drain pipe 34 is communicated with the percolate tank 30, and the drain valve 35 is arranged on the drain pipe 34.
The medium injection system 4 is used for injecting a medium to a flue of the waste heat boiler, and comprises a flue injection assembly, wherein the flue injection assembly comprises a gas side pipeline 40, a water side pipeline 41, a gas side regulating valve 42, a water side regulating valve 43, a spray gun 44 (a two-fluid spray gun) and a flow meter 45, the gas side pipeline 40 is communicated with the compressed air supply system 1 and the spray gun 44, the water side pipeline 41 is communicated with the industrial water supply system 2, the percolate supply system 3 and the spray gun 44, the gas side regulating valve 42 is arranged on the gas side pipeline 40, the water side regulating valve 43 and the flow meter 45 are arranged on the water side pipeline 41, and the spray gun 44 is used for extending into the flue of the waste heat boiler. In this embodiment: the material of the spray head of the spray gun 44 is hastelloy; the flow meter 45 is an electromagnetic flow meter.
The temperature measuring system comprises a first temperature measuring component 60 and a second temperature measuring component 61, wherein the first temperature measuring component 60 is used for measuring the temperature of smoke at the outlet of the flue of the waste heat boiler, and the second temperature measuring component 61 is used for measuring the temperature of smoke at the inlet of the superheater. In this embodiment: the first temperature measurement component 60 and the second temperature measurement component 61 both adopt thermocouples.
To the msw incineration power station of having put into operation, because do not consider the later stage when the design and can increase this system, have with the restraint difficult problem of operation optimization such as current msw incineration subject facility and industrial water and filtration liquid collaborative spraying, can adopt the system of this application to reform transform:
furnace as shown in fig. 2: the waste heat boiler heat recovery system comprises a first waste heat boiler flue 50, a second waste heat boiler flue 51, a third waste heat boiler flue 52 and a horizontal waste heat boiler flue 53, wherein the first waste heat boiler flue 50, the second waste heat boiler flue 51, the third waste heat boiler flue 52 and the horizontal waste heat boiler flue 53 are communicated in sequence.
S1: when the unit normally operates, a compressed air supply system 1, an industrial water supply system 2, a percolate supply system 3, a medium injection system 4 and a temperature measurement system are installed, and a spray gun 44 and a matching system in the medium injection system 4 are installed in place on site;
s2: in the period of blowing out and overhauling, the unit is disassembled at the reserved hole positions of a first flue 50, a second flue 51 and a third flue 52 of the waste heat boiler to preserve heat and make a water-cooled wall to work;
s3: the spray gun 44 of the medium injection system 4 is placed in the position of the furnace wall opening, and the whole system and equipment are debugged.
Specifically, in this embodiment:
the first flue 50 of the waste heat boiler is provided with two sets of medium injection systems: each set of the first flue upper medium injection system and the first flue lower medium injection system comprises 5 sets of flue injection components, the first flue upper medium injection system and the first flue lower medium injection system are arranged up and down, spray guns 44 of the first flue upper medium injection system and the first flue lower medium injection system are horizontally arranged upwards in an inclined mode, and the inclined angle is 15 degrees; the waste heat boiler second flue 51 is provided with a set of second flue medium injection system, the waste heat boiler third flue 52 is provided with a set of third flue medium injection system, the second flue medium injection system and the third flue medium injection system respectively comprise 2 sets of flue injection components, the spray gun 44 of the second medium injection system is horizontally arranged upwards in an inclined mode, the spray gun 44 of the third medium injection system is horizontally arranged downwards in an inclined mode, and the inclined angle is 15 degrees. When the media injection system 4 is turned off, each lance 44 exits to the insulation of the furnace.
The thermocouples of the first temperature measuring assembly 60 are arranged on the cross section where the smoke temperature layer at the outlet of the first flue 50 of the waste heat boiler is located, the left side wall and the right side wall are respectively 1, 2 thermocouples are evenly arranged on the front wall, the number of thermocouples is 4, the number of thermocouples is 1, and the number of thermocouples is 4.
The working principle of the system for cooling the hearth is specifically explained as follows:
s1, the smoke temperature T1 of the smoke temperature layer at the outlet of the first flue of the waste heat boiler is the average value of the thermocouple value of the cross section where the smoke temperature T1 is located, and the smoke temperature T2 of the smoke temperature layer at the inlet of the superheater of the horizontal flue of the waste heat boiler is the average value of the thermocouple value of the cross section where the smoke temperature T2 is located.
S2, establishing the operation logic of the media ejection system 4:
1) when the temperature T1 is more than or equal to 1000 ℃ and the temperature T2 is more than or equal to 580 ℃, synchronously starting a first flue upper medium injection system (five spray guns), a first flue lower medium injection system (five spray guns) and a second flue medium injection system (or a third flue medium injection system and two spray guns);
2) when the temperature T1 is less than or equal to 1000 ℃ and the temperature T2 is greater than or equal to 580 ℃, starting a first flue upper medium injection system (five spray guns) and a first flue lower medium injection system (five spray guns), and closing a second flue medium injection system (or a third flue medium injection system and two spray guns);
3) when the temperature is more than or equal to 900 ℃ and less than or equal to T1 and less than or equal to 1000 ℃ and the temperature is more than or equal to T2 and more than or equal to 580 ℃, synchronously starting a medium injection system on a first flue (or a medium injection system under the first flue, five spray guns) and a medium injection system on a second flue (or a medium injection system under the third flue, two spray guns);
4) when the temperature is more than or equal to 900 ℃ and less than or equal to T1 and less than 1000 ℃ and T2 and less than 580 ℃, synchronously starting a first flue upper medium injection system (or a first flue lower medium injection system and five spray guns), and closing a second flue medium injection system (or a third flue medium injection system and two spray guns);
5) when T1 is less than 900 ℃ and T2 is more than or equal to 580 ℃, closing the first flue upper medium injection system and the first flue lower medium injection system (five spray guns), and starting the second flue medium injection system (or the third flue medium injection system and two spray guns);
5) all media injection systems were turned off when T1<900 ℃ and T2<580 ℃.
S3: and (4) selecting leachate back-spraying or industrial water back-spraying.
The level gauge 300 may be displayed online by the DCS. When the liquid level meter 300 displays that the online liquid level is above the lower liquid Level Limit (LL), leachate is utilized for back spraying, the leachate regulating valve 33, the back spraying pump 32 and the leachate regulating valve 33 are started, and meanwhile, the industrial water supply system 2 is standby. When the storage of the filtered percolate (clear percolate after being filtered by the percolate or concentrated water after being filtered by the ultrafiltration system and the nanofiltration system) is enough, the hearth is cooled by spraying the percolate.
When the on-line liquid level of the liquid level meter 300 is lower than the lower liquid Level Limit (LL) and the leachate after filtration has no stock, the leachate supply system 3 is closed, the industrial water supply system 2 is started, and the water tank regulating valve 23, the back-spray pump 22 and the water tank regulating valve 23 are started.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and to implement the present invention, which cannot limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered by the protection scope of the present invention.
Claims (10)
1. The utility model provides a waste incineration power plant furnace cooling system which characterized in that: the method comprises the following steps:
a compressed air supply system for providing compressed air,
an industrial water supply system for supplying industrial water,
a percolate supply system for supplying percolate,
the medium injection system is used for injecting a medium to a flue of the waste heat boiler and comprises a flue injection assembly, the flue injection assembly comprises a gas side pipeline, a water side pipeline, a gas side regulating valve, a water side regulating valve and a spray gun, the gas side pipeline is communicated with the compressed air supply system and the spray gun, the water side pipeline is communicated with the industrial water supply system, the percolate supply system and the spray gun, the gas side regulating valve is arranged on the gas side pipeline, the water side regulating valve is arranged on the water side pipeline, and the spray gun is used for extending into the flue of the waste heat boiler,
the temperature measuring system comprises a first temperature measuring component and a second temperature measuring component, wherein the first temperature measuring component is used for measuring the temperature of smoke at the outlet of the flue of the waste heat boiler, and the second temperature measuring component is used for measuring the temperature of smoke at the inlet of the superheater.
2. The waste incineration power plant furnace cooling system of claim 1, characterized in that: the medium injection system comprises a first medium injection system, a second medium injection system and a third medium injection system, wherein the first medium injection system is used for injecting a medium to a first flue of the waste heat boiler, the second medium injection system is used for injecting a medium to a second flue of the waste heat boiler, and the third medium injection system is used for injecting a medium to a third flue of the waste heat boiler.
3. The waste incineration power plant furnace cooling system of claim 2, characterized in that: the first medium injection system comprises a first flue upper medium injection system and a first flue lower medium injection system, and the first flue upper medium injection system and the first flue lower medium injection system are arranged up and down.
4. The waste incineration power plant furnace cooling system of claim 2, characterized in that: the spray guns of the first medium injection system and the third medium injection system are horizontally arranged in a downward inclined mode; and the spray gun of the second medium injection system is horizontally arranged upwards in an inclined mode.
5. The waste incineration power plant furnace cooling system of claim 4, characterized in that: the inclined setting angle of the spray guns of the first medium injection system, the second medium injection system and the third medium injection system is 10-20 degrees.
6. The waste incineration power plant furnace cooling system of claim 1, characterized in that: the flue injection assembly also comprises a flow meter, and the flow meter is arranged on the water side pipeline; the flowmeter is an electromagnetic flowmeter.
7. The waste incineration power plant furnace cooling system of claim 1, characterized in that: the compressed air supply system comprises a compressed air storage tank, a compressed air pipeline and a pressure gauge, the compressed air pipeline is communicated with the compressed air storage tank and the air side pipeline, and the pressure gauge is arranged on the compressed air pipeline.
8. The waste incineration power plant furnace cooling system of claim 1, characterized in that: the industrial water supply system comprises an industrial water tank, an industrial water pipeline, a back-spraying pump and a water tank regulating valve, wherein the industrial water tank is provided with a liquid level meter, the industrial water pipeline is communicated with the industrial water tank and the water side pipeline, and the back-spraying pump and the water tank regulating valve are arranged on the industrial water pipeline.
9. The waste incineration power plant furnace cooling system of claim 1, characterized in that: the percolate supply system comprises a percolate tank, a percolate pipeline, a back-spraying pump and a percolate adjusting valve, wherein the percolate tank is provided with a liquid level meter, the percolate pipeline is communicated with the percolate tank and the water side pipeline, and the back-spraying pump and the percolate adjusting valve are arranged on the percolate pipeline.
10. The waste incineration power plant furnace cooling system of claim 1, characterized in that: the spray gun nozzle is made of hastelloy.
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| CN202120577965.2U CN214536192U (en) | 2021-03-22 | 2021-03-22 | Waste incineration power plant furnace cooling system |
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| CN202120577965.2U CN214536192U (en) | 2021-03-22 | 2021-03-22 | Waste incineration power plant furnace cooling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963838A (en) * | 2021-03-22 | 2021-06-15 | 苏州西热节能环保技术有限公司 | Waste incineration power station hearth cooling system and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112963838A (en) * | 2021-03-22 | 2021-06-15 | 苏州西热节能环保技术有限公司 | Waste incineration power station hearth cooling system and method |
| CN112963838B (en) * | 2021-03-22 | 2024-09-27 | 苏州西热节能环保技术有限公司 | Waste incineration power station hearth cooling system and method |
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