CN202791977U - DC (direct current) coal-fired generating unit starting system - Google Patents
DC (direct current) coal-fired generating unit starting system Download PDFInfo
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- CN202791977U CN202791977U CN 201220516422 CN201220516422U CN202791977U CN 202791977 U CN202791977 U CN 202791977U CN 201220516422 CN201220516422 CN 201220516422 CN 201220516422 U CN201220516422 U CN 201220516422U CN 202791977 U CN202791977 U CN 202791977U
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- direct current
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- drainage pump
- unit starting
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Abstract
The utility model discloses a DC (direct current) coal-fired generating unit starting system no-boiler water pump starting system. A drainage pump is additionally arranged on an original water tank drainage system, thus, boiler water can enter a deaerator through the additional drainage pump and directly flow into an economizer through a water supply port; and then the boiler water enters a start separator through a boiler water cooling wall, then enters a connecting ball and enters an atmospheric flash tank through an open hydraulic regulation valve and flows into the water tank to form a thermodynamic cycle and realize no-boiler water pump start of the system. Through the utility model, the starting system still can work normally when the boil water pump fails and cannot be put into operation, and the aim of improving the working efficiency is achieved.
Description
Technical field
The utility model relates to a kind of direct current coal fired power generation unit, and particularly a kind of 630MW level direct current coal fired power generation unit is without stove starting mode of pump system.
Background technology
Present domestic supercritical DC furnace Initial Stage after Ignition because steam production is relatively less, water circulation a little less than, so supercritical DC furnace is typically designed to the start-up system with the stove water pump.In prior art illustrated in figures 1 and 2, direct current coal fired power generation unit starting system comprises that two start 6, one stove water pumps 3 of separator and air suspended type flash vessel 9 and header tank draining system 10.Admission port 1 is connected with stove water pump 3 by mixing filter screen 2, stove water pump 3 connects economizer 4, by boiler cold-water wall 5 economizer 4 is connected with startup separator 6, start separator 6 and connect respectively mixing filter screen 2 and air suspended type flash vessel 9 by connecting ball 7, be provided with two hydraulic adjusting valves 8 on the air suspended type flash vessel 9, atmosphere flash vessel 9 is communicated with header tank 11 in the header tank draining system 10, header tank 11 and the first drainage pump 12, the second drainage pump 13 links to each other respectively, the first drainage pump 12, the second drainage pump 13 links to each other with exhaust apparatus 16 with floss hole 15 by water quality detecting device.
During the coal fired power generation unit starting, feedwater 1 enters the boiler feedwater operating platform through high-pressure heater through the admission port, at first by mixing filter screen 2, enter stove water pump 3, then enter startup separator 6 by economizer 4 through boiler water wall 5, get back to mixing filter screen 2 through connecting ball 7 again, circulate to form.Separator 6 water quality are defective or start separator 6 water levels when too high when starting, and by two hydraulic adjusting valves 8 of air suspended type flash vessel 9 front layouts, make the water that connects in the ball 7 enter air suspended type flash vessel 9 through hydraulic adjusting valve 8, enter header tank draining system 10 again.After feedwater entered header tank draining system 10, feedwater entered header tank 11, and the qualified exhaust apparatus 16 that enters of water quality enters admission port 1 through recovery system, defective outflow floss hole 15. behind the first drainage pump 12, the second drainage pump 13
In initial start stage, being cooperated with feed pump by stove water pump 3 provides power, keeps economizer 4 inlet flow rates and is not less than 600t/h, and guaranteeing the safety of water-cooling wall, and control starts separator 6 water levels at setting.After unit load changed DC operation over to, separator was only as the through-flow parts of pressure-bearing, and this moment, the stove water pump was out of service.
Have with the start-up system of stove water pump that high heat reclaims and the advantage of low medium-loss, but the normal risk that starts of restriction boiler when also existing the stove water pump to break down.Simultaneously, break down at boiler water pump and to withdraw from when for subsequent use, a large amount of working medium and heat can't in time reclaim, heating surface overtemperature and consume a large amount of demineralized waters when causing boiler in start and stop or abnormal conditions occurring.
Therefore, special the utility model that proposes.
The utility model content
The purpose of this utility model be to overcome existing Unit Starting Technology the stove water pump break down when withdrawing from can't start-up system shortcoming, provide a kind of direct current coal group of motors without stove starting mode of pump system, this system can reach generating set and start in the situation that lacks the stove water pump by the repacking to existing equipment, to reach the purpose that improves to greatest extent production capacity.
In order to achieve the above object, the utility model installs the 3rd drainage pump additional in the header tank draining system, it is characterized in that: the admission port directly connects economizer by pipeline, by boiler water wall economizer is connected with the startup separator, start separator and connect respectively mixing filter screen and air suspended type flash vessel by connecting ball, be provided with hydraulic adjusting valve on the air suspended type flash vessel, the atmosphere flash vessel is communicated with header tank in the header tank draining system, header tank and the first drainage pump, the second drainage pump links to each other respectively with the 3rd drainage pump that installs additional, the first drainage pump, the second drainage pump links to each other with exhaust apparatus with floss hole by water quality detecting device, the 3rd drainage pump is connected with oxygen-eliminating device, and oxygen-eliminating device is connected with the admission port by pipeline.
Further, the second valve that arranges on described admission port and the pipeline that economizer is connected is in unlatching.
Further, described admission port with mix the pipeline that filter screen is connected on the first valve of arranging be in closure.
Further, described connection ball with mix the pipeline that filter screen is connected on the 3rd valve that arranges be in closure.
Further, described hydraulic adjusting valve is in unlatching.
Further, the water that flows in the described admission port is demineralized water, and water temperature is 94 ~ 120 ℃.
Further, the 4th valve that arranges on described economizer and the pipeline that the stove water pump is connected is in closure.
The utility model is after the header tank draining system installs the 3rd drainage pump additional, make feedwater can directly flow into economizer through the admission port, enter the startup separator through boiler water wall again, enter the connection ball, enter the air suspended type flash vessel by the hydraulic adjusting valve of opening, flow into the header tank of header tank draining system, the 3rd drainage pump through installing additional enters the admission port with the formation circulation again, thereby reaches the purpose without the stove starting mode of pump.
The beneficial effects of the utility model are, can still make the start-up system normal operation in the situation that stove water pump fault can not put into operation, have avoided simultaneously the waste of resource.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the critical direct current coal fired power generation of the utility model unit starting system schematic.
Fig. 2 is header tank draining system flow chart in the prior art.
Fig. 3 is the utility model header tank draining system flow chart.
Description of symbols among the figure: 1-admission port, 2-mixing filter screen, 3-stove water pump, 4-economizer, 5-water-cooling wall, 6-startup separator, 7-connection ball, 8-hydraulic control valve, 9-air suspended type flash vessel, 10-header tank draining system, 11-header tank, the 12-the first drainage pump, the 13-the second drainage pump, 14-oxygen-eliminating device, 15-exhaust apparatus, 16-efflux mouth, the 17-the three drainage pump, the 18-the first valve, the 19-the second valve, the 20-the three valve, the 21-the four valve.
The specific embodiment
Referring to Fig. 1 and shown in Figure 3
The utility model direct current coal fired power generation unit is to install the 3rd drainage pump additional in original header tank draining system without stove starting mode of pump system, admission port 1 is linked to each other by the pipeline that is provided with the 3rd valve 20 with mixing filter screen 2, mixing filter screen 2 is connected with stove water pump 3, be provided with the 4th valve 21 between the stove water pump 3 connection economizers 4, by boiler water wall 5 economizer 4 is connected with startup separator 6, start separator 6 and connect respectively mixing filter screen 2 and air suspended type flash vessel 9 by connecting ball 7, the install pipeline that connects ball 7 and mix between the filter screen 2 has the first valve 18, be provided with two hydraulic adjusting valves 8 on the air suspended type flash vessel 9, atmosphere flash vessel 9 is communicated with header tank 11 in the header tank draining system 10, header tank 11 and the first drainage pump 12, the second drainage pump 13 links to each other respectively with the 3rd drainage pump 17, the first drainage pump 12, the second drainage pump 13 links to each other with exhaust apparatus 16 with floss hole 15 by water quality detecting device, the 3rd drainage pump 17 links to each other with admission port 1 by oxygen-eliminating device 14, and admission port 1 directly links to each other with economizer 4 by the pipeline that is provided with the second valve 19.
When the utility model starts in system, open the second valve 19, closed the 3rd valve 20, the first valve 18 and the 4th valve 21, make the directly 1 inflow economizer 4 through the admission port of feedwater, flow remained on 240t/h when feedwater flowed into economizer 4 before igniting, feedwater flow adds to 400t/h after the igniting, remain at last 640t/h, make simultaneously the feedwater water temperature be controlled at 94 ~ 120 ℃, feedwater enters through boiler water wall 5 and starts separator 6, the control feedwater flow is in below the safety line water level that starts in the separator, then recirculated water enters and connects ball 7, enter air suspended type flash vessel 9 by the hydraulic adjusting valve 8 of opening, flow into again the header tank 11 of header tank draining system 10 by pipeline, finally by the 3rd drainage pump 17 that installs additional recirculated water is flow to admission port 1 by oxygen-eliminating device 14, thereby the formation thermodynamic cycle has reached the purpose of unit without the stove starting mode of pump.When system closing, the water in the header tank 11 flows into emission point through the first drainage pump 12, the second drainage pump 13 through floss hole 15.
The utility model is by installing the 3rd drainage pump 17 additional, solved the problem that coal-fired group of motors can't start in without stove water pump situation, and utilizes short construction period, lower expense to reach the purpose that coal-fired group of motors is produced in without stove water pump situation.
It should be noted that; above-mentioned specific embodiment only is exemplary; under above-mentioned instruction of the present utility model, those skilled in the art can carry out various improvement and distortion on the basis of above-described embodiment, and these improvement or distortion drop in the protection domain of the present utility model.
It will be understood by those skilled in the art that top specific descriptions just in order to explain purpose of the present invention, is not for restriction the utility model.Protection domain of the present utility model is limited by claim and equivalent thereof.
Claims (7)
1. direct current coal fired power generation unit starting system, it is characterized in that: admission port (1) directly connects economizer (4) by pipeline, by boiler water wall (5) economizer (4) is connected with startup separator (6), start separator (6) and connect respectively mixing filter screen (2) and air suspended type flash vessel (9) by connecting ball (7), be provided with hydraulic adjusting valve (8) on the air suspended type flash vessel (9), atmosphere flash vessel (9) is communicated with header tank (11) in the header tank draining system (10), header tank (11) and the first drainage pump (12), the second drainage pump (13) links to each other respectively with the 3rd drainage pump (17) that installs additional, the first drainage pump (12), the second drainage pump (13) links to each other with exhaust apparatus (16) with floss hole (15) by water quality detecting device, the 3rd drainage pump (17) is connected with oxygen-eliminating device (14), and oxygen-eliminating device (14) is connected with admission port (1) by pipeline.
2. a kind of direct current coal fired power generation unit starting according to claim 1 system is characterized in that: described admission port (1), its with pipeline that economizer (4) is connected on the second valve (19) of arranging be in unlatching.
3. a kind of direct current coal fired power generation unit starting according to claim 1 system is characterized in that: described admission port (1), its with mix the pipeline that filter screen (2) is connected on the 3rd valve (20) that arranges be in closure.
4. a kind of direct current coal fired power generation unit starting according to claim 1 system is characterized in that: described connection ball (7), its with mix the pipeline that filter screen (2) is connected on the first valve (18) of arranging be in closure.
5. a kind of direct current coal fired power generation unit starting according to claim 1 system, it is characterized in that: described hydraulic adjusting valve (8) is in unlatching.
6. a kind of direct current coal fired power generation unit starting according to claim 1 system, it is characterized in that: the water that flows in described admission port (1) is demineralized water, and water temperature is 94 ~ 120 ℃.
7. a kind of direct current coal fired power generation unit starting according to claim 1 system is characterized in that: described economizer (4), its with pipeline that stove water pump (3) is connected on the 4th valve (21) that arranges be in closure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220516422 CN202791977U (en) | 2012-10-10 | 2012-10-10 | DC (direct current) coal-fired generating unit starting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220516422 CN202791977U (en) | 2012-10-10 | 2012-10-10 | DC (direct current) coal-fired generating unit starting system |
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| Publication Number | Publication Date |
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| CN202791977U true CN202791977U (en) | 2013-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220516422 Expired - Lifetime CN202791977U (en) | 2012-10-10 | 2012-10-10 | DC (direct current) coal-fired generating unit starting system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240823A (en) * | 2015-11-18 | 2016-01-13 | 国网山东无棣县供电公司 | Atmosphere flash vessel dead steam recycling system for power station boiler |
| CN106369579A (en) * | 2016-08-31 | 2017-02-01 | 福建省鸿山热电有限责任公司 | Method for starting once-through boiler with boiler circulating pump when boiler circulating pump breaks down |
-
2012
- 2012-10-10 CN CN 201220516422 patent/CN202791977U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105240823A (en) * | 2015-11-18 | 2016-01-13 | 国网山东无棣县供电公司 | Atmosphere flash vessel dead steam recycling system for power station boiler |
| CN106369579A (en) * | 2016-08-31 | 2017-02-01 | 福建省鸿山热电有限责任公司 | Method for starting once-through boiler with boiler circulating pump when boiler circulating pump breaks down |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130313 |
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| CX01 | Expiry of patent term |