CN215175373U - Circulating fluidized bed boiler slag cooler waste heat heating system - Google Patents
Circulating fluidized bed boiler slag cooler waste heat heating system Download PDFInfo
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- CN215175373U CN215175373U CN202120299467.6U CN202120299467U CN215175373U CN 215175373 U CN215175373 U CN 215175373U CN 202120299467 U CN202120299467 U CN 202120299467U CN 215175373 U CN215175373 U CN 215175373U
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Abstract
The utility model provides a cold sediment ware waste heat heating system of circulating fluidized bed boiler, includes the bearing seal heater, the first sweetgum fruit of bearing seal heater passes through pipe connection No. low pressure heater, and the second sweetgum fruit is provided with flowmeter, cold sediment ware, booster pump, heat supply network heat exchanger and heat supply network on passing through the pipeline, heat supply network heat exchanger and heat supply network parallel arrangement, heat supply network heat exchanger and heat supply network output divide into two the tunnel, and one road passes through condenser return water to No. 7 low pressure heater entry electrically operated gate and joins the back with first road and communicates No. 7 low pressure heater, and another road passes through condenser return water to No. 7 low pressure heater export electrically operated gate and communicates No. 7 low pressure heater. The utility model discloses a control suitable condensate flow, can reduce the lime-ash temperature that cold sediment ware got rid of to retrieve the row's sediment heat in the lime-ash completely, the backheat system of turboset is not influenced.
Description
Technical Field
The utility model relates to a heating system technical field, in particular to circulating fluidized bed boiler slag cooler waste heat heating system.
Background
The bed temperature of the circulating fluidized bed boiler is usually 850-950 ℃, the slag discharge temperature is similar to the bed temperature, and the traditional slag cooler of the circulating fluidized bed boiler recovers the slag discharge waste heat of the slag cooler by heating condensed water. This mode has reduced the sediment waste heat loss of arranging, has certain meaning to the operation economic nature that improves the unit. But the slag discharging temperature is still between 70 and 120 ℃, and the physical heat loss of the ash is still large.
At present, the circulating fluidized bed boiler is adopted to discharge slag and heat, and heating is not reported in a public way.
In the existing heating technology, only 5-section steam extraction is adopted as a heating source, and along with the increase of the heating requirements of city expansion and extremely cold weather, the existing heating capacity of a unit cannot meet the heating requirements.
The existing system can not completely utilize the residual heat of slag discharge, and the physical heat loss of ash slag of the boiler is still very high.
In the prior art, a section of steam extraction is adopted for heat supply, which is equivalent to increase of a heat transfer flow, and the heat exchange efficiency is low.
Disclosure of Invention
In order to overcome the defects of the prior art, the utility model aims to provide a circulating fluidized bed boiler slag cooler waste heat heating system, through controlling suitable condensate flow, can reduce the temperature of the discharged ash slag of the slag cooler, thereby recycling the slagging heat in the ash slag to a greater extent, and the heat recovery system of the turbine unit is not influenced.
In order to realize the purpose, the utility model discloses a technical scheme is:
the utility model provides a cold sediment ware waste heat heating system of circulating fluidized bed boiler, includes the bearing seal heater, the first sweetgum fruit of bearing seal heater passes through No. 7 low pressure heaters of pipe connection, and the second sweetgum fruit is provided with flowmeter, cold sediment ware, booster pump, heat supply network heat exchanger and heat supply network on passing through the pipeline, heat supply network heat exchanger and the parallelly connected setting of heat supply network, heat supply network heat exchanger and heat supply network output divide into two the tunnel, and according to the heating demand switching mode of throwing, one sweetgum fruit gets into No. 7 low pressure heaters after passing through condenser return water to No. 7 low pressure heaters entry electric door and converging with first, and another road gets into No. 7 low pressure heaters through condenser return water to No. 7 low pressure heaters export electric door.
An electric stop gate, an electric adjusting gate and an electric stop gate are arranged between the shaft seal heater and the flowmeter, and the electric stop gate, the electric adjusting gate and the electric stop gate are connected in parallel.
The booster pump is characterized in that a booster pump inlet electric door and a booster pump outlet electric door are respectively arranged at the front end and the rear end of the booster pump, and three paths of the booster pump are connected in parallel.
The heat supply network heat exchanger comprises a heat supply network heat exchanger, a heat supply network heat exchanger bypass, a heat supply network heat exchanger inlet electric door, a heat supply network heat exchanger outlet adjusting door, a heat supply network heat exchanger bypass, a heat exchanger bypass electric door and a heat exchanger bypass adjusting door, wherein the heat supply network heat exchanger is connected with the heat supply network heat exchanger in parallel, and the heat supply network heat exchanger bypass is provided with the heat exchanger bypass electric door and the heat exchanger bypass adjusting door.
The beneficial effects of the utility model.
The utility model discloses arrange sediment heat is retrieved to the degree of depth, reduces heat supply coal consumption, really accomplishes energy saving and emission reduction. Under the extreme weather of city expansion and winter in the north, the demand of heat users on heat supply quality and heat supply range is met. Through simple system equipment transformation, the heat supply capacity of enterprises is improved, and the profit capacity is enhanced in the face of complex market competition environment.
In the initial stage and the final stage of heat supply, namely during the heat supply valley, the deslagging waste heat can be fully utilized, the cascade utilization of energy is realized, the heating capacity is improved, the user requirement is met, the thermal power unit can reduce the load and adapt to the requirement of power grid peak regulation, and the capacity of power generation enterprises for adapting to market competition is improved.
Description of the drawings:
fig. 1 is a schematic diagram of the system structure of the present invention.
The reference signs are:
1. the system comprises a shaft seal heater 2, a first electric stop door 3, a first electric adjusting door 4, a second electric stop door 5, a third electric stop door 6, a fourth electric stop door 7, a second electric adjusting door 8, a fifth electric stop door 9, a flowmeter 10, a slag cooler 11, a heat supply network heat exchanger inlet electric door 12, a heat supply network heat exchanger outlet adjusting door 13, a booster pump inlet electric door 14, a booster pump 15, a booster pump outlet electric door 16, a No. 7 low-pressure heater 17, a heat supply network heat exchanger 18, a heat supply network 19, a heat exchanger bypass electric door 20, a heat exchanger bypass adjusting door 21, a condenser backwater to No. 7 low-pressure heater outlet electric door 22, a condenser backwater to No. 7 low-pressure heater inlet electric door 23, a heat supply network heat exchanger bypass and a sixth electric stop door 24.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples.
As shown in fig. 1:
the utility model provides a circulating fluidized bed boiler slag cooler waste heat heating system, includes bearing seal heater 1, bearing seal heater 1 first sweetgum fruit is through No. 7 low pressure heater 16 of pipe connection, and the second sweetgum fruit is through being provided with flowmeter 9, slag cooler 10, booster pump 14, heat supply network heat exchanger 17 and heat supply network 18 on the pipeline, heat supply network heat exchanger 17 and heat supply network 18 parallel arrangement, and heat supply network heat exchanger 17 and 18 output end of heat supply network divide into two the tunnel, and one sweetgum fruit is crossed condenser return water and is joined the back with first tunnel to No. 7 low pressure heater entry electrically operated gate 22 and get into No. 7 low pressure heater 16, and another tunnel is through condenser return water and is converged with No. 7 low pressure heater 16 condensate water main road through electrically operated gate 21.
An electric stop gate IV 6, an electric adjusting gate II 7 and an electric stop gate V8 are arranged between the shaft seal heater 1 and the flowmeter 9, and an electric stop gate VI 24 is arranged on the electric stop gate IV 6, the electric adjusting gate II 7 and the electric stop gate V8 in parallel.
Two ends are provided with booster pump entry electrically operated gate 13 and booster pump export electrically operated gate 15 respectively around booster pump 14, booster pump 14 connects in parallel and is provided with three routes.
The heat supply network heat exchanger comprises a heat supply network heat exchanger 17, and is characterized in that a heat supply network heat exchanger inlet electric door 11 and a heat supply network heat exchanger outlet adjusting door 12 are respectively arranged at the front end and the rear end of the heat supply network heat exchanger 17, a heat supply network heat exchanger bypass 23 is connected on the heat supply network heat exchanger 17 in parallel, and a heat exchanger bypass electric door 19 and a heat exchanger bypass adjusting door 20 are arranged on the heat supply network heat exchanger bypass 23.
The first way is provided with an electric stop gate I2, an electric adjusting gate I3 and an electric stop gate II 4, and the electric stop gate I2, the electric adjusting gate I3 and the electric stop gate II 4 are connected in parallel with an electric stop gate III 5.
The utility model discloses a theory of operation:
part of condensed water from the shaft seal heater 1 enters a boiler slag cooler 10 at the temperature of 40-50 ℃ through an electric stop gate IV 6, an electric stop gate 7, an electric stop gate V8 and a flowmeter 9 to serve as cooling water of the slag cooler 10, absorbs residual heat of slag discharged by a circulating fluidized bed boiler, rises to 80-100 ℃, and is subjected to pressure rise by a booster pump 14 in two operation modes: when the heating system runs in a heating season, the water passes through the inlet electric door 11 of the heat supply network heat exchanger to exchange heat with circulating water of the heat supply network heat exchanger 17, is cooled to 40-50 ℃, then passes through the outlet adjusting door 12 of the heat supply network heat exchanger, returns to the No. 7 low inlet electric door 22 through the slag cooler, is mixed with main path condensed water, and enters the No. 7 low heater 16; the heat supply network circulating water enters the heat supply network heat exchanger 17 in a countercurrent mode to exchange heat with the heated condensed water, and the heated circulating water of the heat supply network is supplied to a heat user, so that the residual heat of slag discharge is merged into a heat supply network heating system. When the heating system runs in a heating season, the opening degree of the outlet adjusting door 12 of the heat supply network heat exchanger can be adjusted according to heating requirements, and the heating requirements are met.
When the system is operated in a non-heating season, heated condensed water is returned to a No. 7 low-pressure outlet electric door 21 through a heat exchanger bypass electric door 19, a heat supply network heat exchanger bypass 23 and a heat exchanger bypass adjusting door 20 after being boosted by a booster pump, and is converged with main condensed water. The outlet regulating door 12 of the heat exchanger of the heat supply network can be slightly opened in non-heating seasons, so that the requirement of hot water for life in a plant area is met.
Claims (5)
1. The utility model provides a circulating fluidized bed boiler slag cooler waste heat heating system, its characterized in that, includes bearing seal heater (1), bearing seal heater (1) first way is through No. 7 low pressure heater (16) of pipe connection, and the second way is through being provided with flowmeter (9), slag cooler (10), booster pump (14), heat supply network heat exchanger (17) and heat supply network (18) on the pipeline, heat supply network heat exchanger (17) and heat supply network (18) parallel arrangement, and heat supply network heat exchanger (17) and heat supply network (18) output divide into two routes, and one way is through condenser return water to No. 7 low pressure heater entry electrically operated gate (22) and first way and join behind intercommunication No. 7 low pressure heater (16), and another way is through condenser return water to No. 7 low pressure heater export electrically operated gate (21) and communicate No. 7 low pressure heater (16).
2. The circulating fluidized bed boiler slag cooler waste heat heating system according to claim 1, wherein an electric stop gate IV (6), an electric adjusting gate II (7) and an electric stop gate V (8) are arranged between the shaft seal heater (1) and the flowmeter (9), and an electric stop gate VI (24) is arranged on the electric stop gate IV (6), the electric adjusting gate II (7) and the electric stop gate V (8) in parallel.
3. The heating system using waste heat of the slag cooler of the circulating fluidized bed boiler as claimed in claim 1, wherein the booster pump (14) is provided with a booster pump inlet electric door (13) and a booster pump outlet electric door (15) at the front end and the rear end respectively, and the booster pump (14) is provided with three paths in parallel.
4. The circulating fluidized bed boiler slag cooler waste heat heating system according to claim 1, wherein a heat supply network heat exchanger inlet electric door (11) and a heat supply network heat exchanger outlet adjusting door (12) are respectively arranged at the front end and the rear end of the heat supply network heat exchanger (17), a heat supply network heat exchanger bypass (23) is connected in parallel on the heat supply network heat exchanger (17), and a heat exchanger bypass electric door (19) and a heat exchanger bypass adjusting door (20) are arranged on the heat supply network heat exchanger bypass (23).
5. The circulating fluidized bed boiler slag cooler waste heat heating system according to claim 1, wherein a first electric stop gate (2), a first electric adjusting gate (3) and a second electric stop gate (4) are arranged on the first path, and a third electric stop gate (5) is arranged on the first electric stop gate (2), the first electric adjusting gate (3) and the second electric stop gate (4) in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120299467.6U CN215175373U (en) | 2021-01-26 | 2021-01-26 | Circulating fluidized bed boiler slag cooler waste heat heating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120299467.6U CN215175373U (en) | 2021-01-26 | 2021-01-26 | Circulating fluidized bed boiler slag cooler waste heat heating system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215175373U true CN215175373U (en) | 2021-12-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120299467.6U Active CN215175373U (en) | 2021-01-26 | 2021-01-26 | Circulating fluidized bed boiler slag cooler waste heat heating system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215175373U (en) |
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2021
- 2021-01-26 CN CN202120299467.6U patent/CN215175373U/en active Active
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