CN202709078U - Flue waste heat utilization system of double-medium on-off circulating boiler - Google Patents
Flue waste heat utilization system of double-medium on-off circulating boiler Download PDFInfo
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- CN202709078U CN202709078U CN 201220367512 CN201220367512U CN202709078U CN 202709078 U CN202709078 U CN 202709078U CN 201220367512 CN201220367512 CN 201220367512 CN 201220367512 U CN201220367512 U CN 201220367512U CN 202709078 U CN202709078 U CN 202709078U
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Abstract
The utility model discloses a flue waste heat utilization system of a double-medium on-off circulating boiler. The flue waste heat utilization system of the double-medium on-off circulating boiler comprises a flue waste heat utilization device and a steam turbine condensate system which is connected with the flue waste heat utilization device through a pipeline; a water inlet pipe is arranged at one end of the flue waste heat utilization device; a water outlet pipe is arranged at the other end; the other end of the water inlet pipe and the other end of the water outlet pipe are respectively connected with corresponding ends of a plate-type heat exchanger; the plate-type heat exchanger is connected with the steam turbine condensate system; a discharge pipe with an electric valve, a closed-cycle water pump, a water source pipe with an electric valve and a stop valve I are orderly arranged on the water inlet pipe between the flue waste heat utilization device and the plate-type heat exchanger; a heat pipeline water supply pipe with an electric valve, the electric valve, a heat pipeline reflux pipe with an electric valve and a stop valve II are orderly arranged on the water outlet pipe between the flue waste heat utilization device and the plate-type heat exchanger, and a bypass pipe with an electric valve is also arranged between the water outlet pipe and the water inlet pipe. According to the flue waste heat utilization system, the economical efficiency and the security in flue waste heat utilization are improved.
Description
Technical field
The utility model relates to a kind of smoke waste heat utilization system.
Background technology
The thermal power plant is said maximum is heat loss due to exhaust gas in the boiler heat loss.In general, l0 ℃ of the every reduction of exhaust gas temperature, boiler thermal output improves about 0.5% to 0.6%.Therefore, boiler exhaust gas is the residual heat resources that potentiality are very large.And owing to build up unit operation cigarette temperature usually above design cigarette temperature, also caused the decline of boiler thermal output.The rational and efficient use fume afterheat can reduce the wet desulphurization absorption tower entrance flue gas temperature simultaneously, can reduce gross coal consumption rate and save desulfurization water consumption, energy savings.
The more fume afterheat scheme of utilizing of domestic application is at present: the absorption tower entrance is installed flue gas waste heat utilization device, makes flue gas and condensate water directly carry out heat exchange, improves condensing water temperature, reduces extracted steam from turbine, to reach energy-saving effect.
Utilize the direct heat-setting water system of fume afterheat condensing water conduit need to be caused behind the stove desulfurization place and takes back from steam turbine building, distance is longer, and the whole system design pressure is higher, needs and condensate system design pressure are consistent, cause pipeline and valve all to need to invest higher by the design of high pressure grade.Simultaneously because the flue gas waste heat utilization device environment for use is abominable, in the time of energy-conservation also the security to main system bring certain hidden danger.The scheme of the direct heat-setting water of Mist heat recovering, the heat utilization ratio of flue gas only are 11%～15%, and all the other major parts are all discharged by condenser.
The utility model content
The utility model technical issues that need to address provide a kind of economy of fume afterheat utilization and system of security of improving.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is:
A kind of pair of medium open and close type combined-circulation once-through boiler smoke waste heat utilization system, comprise flue gas waste heat utilization device and the steam turbine condensate system that is connected with flue gas waste heat utilization device by pipeline, one end of described flue gas waste heat utilization device is provided with water inlet pipe, and the other end is provided with outlet pipe; The other end of water inlet pipe is connected the other end and is connected with the respective ends of plate type heat exchanger respectively with outlet pipe, plate type heat exchanger is connected with the steam turbine condensate system, be disposed with blow-off pipe, closed cycle water pump, the water source tube with motor-driven valve, stop valve I with motor-driven valve on the water inlet pipe between flue gas waste heat utilization device and the plate type heat exchanger, the other end of water source tube connects with the differential pressure water tank that is connected the water source, also is provided with adjutage on the differential pressure water tank; Be disposed with heat supply network feed pipe, motor-driven valve, the heat supply network return pipe with motor-driven valve, stop valve II with motor-driven valve on the outlet pipe between flue gas waste heat utilization device and the plate type heat exchanger; Also be provided with the shunt valve with motor-driven valve between outlet pipe and the water inlet pipe, the connector of shunt valve and outlet pipe is on the outlet pipe between stop valve II and the heat supply network return pipe, and the connector of shunt valve and water inlet pipe is on the water inlet pipe between stop valve I and the water source tube.
Because the technological progress of having adopted technique scheme, the utility model to obtain is:
The utility model being provided with utilized the device of fume afterheat heating heat supply network recirculated water, the heat network system design pressure is much lower than the condensate system design pressure, so that from steam turbine building to desulfurization between the cigarette water-to-water heat exchanger of zone system equipment, pipeline and valve all design by lower pressure rating, thereby invest lowlyer, the flue gas heat utilization rate is higher.When only utilizing fume afterheat heat-setting water, the hot net water pipeline valve is closed, system carries out closed cycle, fume afterheat transmits closed cycle water with heat, closed cycle water passes to condensate water with heat by the plate type heat exchanger that is arranged in the steam turbine building again, realize reducing extracted steam from turbine, reduce gross coal consumption rate.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Wherein, 1, the steam turbine condensate system, 2, plate type heat exchanger, 3, shunt valve, 4, heat supply network return pipe, 5, the heat supply network feed pipe, 6, outlet pipe, 7, flue gas waste heat utilization device, 8, blow-off pipe, 9, water inlet pipe, 10, the closed cycle water pump, 11, water source tube, 12, adjutage, 13, the differential pressure water tank, 14, the motor-driven valve II, 15, the stop valve I, 16, stop valve II, 17, the motor-driven valve I, 18, the motor-driven valve V, 19, motor-driven valve III, 20, the motor-driven valve IV, 21, the motor-driven valve VI.
The specific embodiment
Below in conjunction with description of drawings the utility model is described in further details:
A kind of pair of medium open and close type combined-circulation once-through boiler smoke waste heat utilization system, comprise flue gas waste heat utilization device 7 and the steam turbine condensate system 1 that is connected with flue gas waste heat utilization device 7 by pipeline, one end of flue gas waste heat utilization device 7 is provided with water inlet pipe 9, and the other end is provided with outlet pipe 6; The other end that the other end of water inlet pipe 9 is connected with outlet pipe is connected with the respective ends of plate type heat exchanger 2 respectively, plate type heat exchanger 2 also is connected with steam turbine condensate system 1, be disposed with blow-off pipe 8, closed cycle water pump 10, water source tube 11, stop valve I 15 between water inlet pipe 9 and the plate type heat exchanger 2, be provided with motor-driven valve I 17 on the blow-off pipe 8, the other end of water source tube 11 connects with the differential pressure water tank 13 that is connected the water source, be provided with motor-driven valve II 14 on the water source tube 11, also be provided with adjutage 12 on the differential pressure water tank 13; Be disposed with heat supply network feed pipe 5, heat supply network return pipe 4, stop valve II 16 between outlet pipe 6 and the plate type heat exchanger 2, be provided with motor-driven valve III 19 on the heat supply network feed pipe 5, be provided with motor-driven valve V 18 on the heat supply network return pipe 4, be provided with motor-driven valve IV 20 on the outlet pipe 6 between heat supply network feed pipe 5 and the heat supply network return pipe 4; Also be provided with shunt valve 3 between outlet pipe 6 and the water inlet pipe 9, the connector of shunt valve 3 and outlet pipe 6 is on the outlet pipe 6 between stop valve II 16 and the heat supply network return pipe 4, the connector of shunt valve 3 and water inlet pipe 9 also is provided with motor-driven valve VI 21 on the shunt valve 3 on the water inlet pipe 9 between stop valve I 15 and the water source tube 11.
When utilizing flue gas waste heat utilization device 7 heating heat supply network recirculated water, close stop valve I 15 and the stop valve II 16 of plate type heat exchanger 2 both sides, close the motor-driven valve I 17 of blow-off pipe 8 and the motor-driven valve IV 20 on the outlet pipe 6, open the motor-driven valve of other all pipelines, water flows to water inlet pipe 9 from differential pressure water tank 13, heating through flue gas waste heat utilization device 7, current direction outlet pipe 6, water flows to heat supply network feed pipe 5 again, then flow back into the outlet pipe 6 from heat supply network return pipe 4, flow back to water inlet pipe 9 from shunt valve 3 again, circulate, such design takes full advantage of the heat of flue gas; When only using fume afterheat heat-setting water, close the motor-driven valve VI 21 on heat supply network feed pipe 5, heat supply network return pipe 4, water source tube 11 and the shunt valve 3, open the motor-driven valve IV 20 on stop valve I 15, stop valve II 16, the outlet pipe 6, after water heats through flue gas waste heat utilization device 7, pass to steam turbine condensate system 1, heat-setting water through plate type heat exchanger 2.
If do not use flue gas waste heat utilization device 7, from blow-off pipe 8, water emitted get final product.
Claims (1)
1. two medium open and close type combined-circulation once-through boiler smoke waste heat utilization system, comprise flue gas waste heat utilization device (7) and the steam turbine condensate system (1) that is connected with flue gas waste heat utilization device (7) by pipeline, it is characterized in that: an end of described flue gas waste heat utilization device (7) is provided with water inlet pipe (9), and the other end is provided with outlet pipe (6); The other end of water inlet pipe (9) is connected 6 with outlet pipe) the other end be connected with the respective ends of plate type heat exchanger (2) respectively, plate type heat exchanger (2) is connected with steam turbine condensate system (1), be disposed with the blow-off pipe (8) of band motor-driven valve I (17) on the water inlet pipe (9) between flue gas waste heat utilization device (7) and the plate type heat exchanger (2), closed cycle water pump (10), the water source tube (11) of band motor-driven valve II (14), stop valve I (15), the other end of water source tube (11) connects with the differential pressure water tank (13) that is connected the water source, also is provided with adjutage (12) on the differential pressure water tank (13); Be disposed with heat supply network feed pipe (5), the motor-driven valve IV (20) of being with motor-driven valve III (19), heat supply network return pipe (4), the stop valve II (16) of being with motor-driven valve V (18) on the outlet pipe (6) between flue gas waste heat utilization device (7) and the plate type heat exchanger (2); Also be provided with the shunt valve (3) of band motor-driven valve VI (21) between outlet pipe (6) and the water inlet pipe (9), the connector of shunt valve (3) and outlet pipe (6) is positioned on the outlet pipe (6) between stop valve II (16) and the heat supply network return pipe (4), and the connector of shunt valve (3) and water inlet pipe (9) is positioned on the water inlet pipe (9) between stop valve I (15) and the water source tube (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367512 CN202709078U (en) | 2012-07-27 | 2012-07-27 | Flue waste heat utilization system of double-medium on-off circulating boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220367512 CN202709078U (en) | 2012-07-27 | 2012-07-27 | Flue waste heat utilization system of double-medium on-off circulating boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202709078U true CN202709078U (en) | 2013-01-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220367512 Expired - Lifetime CN202709078U (en) | 2012-07-27 | 2012-07-27 | Flue waste heat utilization system of double-medium on-off circulating boiler |
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| Country | Link |
|---|---|
| CN (1) | CN202709078U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128527A (en) * | 2016-07-05 | 2016-11-16 | 中国核动力研究设计院 | The initial operating mode of passive experiment sets up aid system and using method thereof |
-
2012
- 2012-07-27 CN CN 201220367512 patent/CN202709078U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106128527A (en) * | 2016-07-05 | 2016-11-16 | 中国核动力研究设计院 | The initial operating mode of passive experiment sets up aid system and using method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 050000 No. 6 Jianbei Street, Shijiazhuang City, Hebei Province Patentee after: POWERCHINA HEBEI ELECTRIC POWER ENGINEERING Co.,Ltd. Address before: 050000 No. 6 Jianbei Street, Shijiazhuang City, Hebei Province Patentee before: HEBEI ELECTRIC POWER DESIGN & Research Institute |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130130 |
|
| CX01 | Expiry of patent term |