CN204922936U - Low pressure economizer connected system - Google Patents

Low pressure economizer connected system Download PDF

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Publication number
CN204922936U
CN204922936U CN201520610743.0U CN201520610743U CN204922936U CN 204922936 U CN204922936 U CN 204922936U CN 201520610743 U CN201520610743 U CN 201520610743U CN 204922936 U CN204922936 U CN 204922936U
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China
Prior art keywords
low
low pressure
pressure
coal saver
valve
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CN201520610743.0U
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Chinese (zh)
Inventor
郑威
丁俊齐
郝玉振
刘浩
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Shandong Electric Power Co Ltd
Shandong Zhongshi Yitong Group Co Ltd
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Abstract

The utility model discloses a low pressure economizer connected system, include: first order low pressure feed water heater, second level low pressure feed water heater and the third level low pressure feed water heater of series connection in proper order, booster water pump and low pressure economizer, first order low pressure feed water heater's water inlet through first valve with booster water pump's water inlet links to each other, first order low pressure feed water heater's delivery port pass through the second valve with booster water pump's water inlet links to each other, booster water pump's delivery port and low pressure economizer water inlet are connected, and low pressure economizer delivery port passes through the third valve to be connected with third level low pressure feed water heater's water inlet, and low pressure economizer delivery port passes through four valves and is connected with third level low pressure feed water heater's delivery port. The utility model discloses beneficial effect: can guarantee that the low pressure economizer brings the energy -conserving effect that the unit is the biggest.

Description

Low-pressure coal saver connected system
Technical field
The utility model relates to the low-pressure coal saver technical field of Turbo-generator Set, particularly relates to a kind of low-pressure coal saver connected system being applied to Turbo-generator Set.
Technical background
Low-pressure coal saver is installed on boiler tail to realize energy-conservation a kind of device by recovery waste heat, and its connected system is the part of thermodynamic system of steam tur.At present, for the low-pressure coal saver connected system only having three grades of low-pressure heaters, condensate water draws two-way from the import of first order low-pressure heater and outlet respectively, enters low-pressure coal saver after mixing, and condensate water is connected to the outlet of most end one-level low-pressure heater after low-pressure coal saver heat absorption.
Above-mentioned low-pressure coal saver connected system only at low-pressure coal saver leaving water temperature higher than could be energy-conservation most effectively during most end one-level low-pressure heater leaving water temperature, if boiler combustion changes or low-pressure coal saver heat exchanger dust stratification time, low-pressure coal saver leaving water temperature just may be caused to reduce, although low-pressure coal saver leaving water temperature can be improved by reducing low-pressure coal saver flow of inlet water, but also improve the exhaust gas temperature of boiler simultaneously, reduce the caloric receptivity of boiler tail waste heat, thus reduce the overall energy-saving effect of low-pressure coal saver to unit.
Utility model content
The purpose of this utility model solves the problem exactly, there is provided a kind of low-pressure coal saver connected system, this system achieves low-pressure coal saver can be energy-conservation most effectively when boiler combustion changes or low-pressure coal saver soot blower to break down etc. and causes low-pressure coal saver leaving water temperature to reduce.
To achieve these goals, the utility model adopts following technical scheme:
A kind of low-pressure coal saver connected system, comprising: the some grades of low-pressure heaters be sequentially connected in series, booster water pump and low-pressure coal saver; The water inlet of described first order low-pressure heater is connected with the water inlet of described booster water pump by the first valve, the delivery port of first order low-pressure heater is connected with the water inlet of described booster water pump by the second valve, the delivery port of described booster water pump is connected with low-pressure coal saver water inlet, low-pressure coal saver delivery port is connected by the water inlet of the 3rd valve with most final stage low-pressure heater, and low-pressure coal saver delivery port passes through the 4th valve and is connected with the delivery port of most final stage low-pressure heater.
At least three grades of low-pressure heaters are sequentially connected in series.
Described most end grade low-temp heater is connected with oxygen-eliminating device.
The beneficial effects of the utility model are:
When boiler combustion meets low-pressure coal saver design parameter and low-pressure coal saver heat-transfer surface keeps clean, low-pressure coal saver water outlet, a little more than the leaving water temperature of most end one-level low-pressure heater, is caused the delivery port of most end one-level low-pressure heater by low-pressure coal saver leaving water temperature;
When boiler combustion change or low-pressure coal saver heat-transfer surface dust stratification, when causing the leaving water temperature of the leaving water temperature of low-pressure coal saver lower than most end one-level low-pressure heater, the water outlet of low-pressure coal saver is caused the water inlet of most end one-level low-pressure heater.
Above two kinds of ruuning situations, all can avoid the minimizing of the caloric receptivity of boiler tail waste heat, ensure that low-pressure coal saver brings unit maximum energy-saving effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of the utility model low-pressure coal saver connected system;
Wherein, 1, #1 low-pressure heater; 2, #2 low-pressure heater; 3, #3 low-pressure heater; 4, oxygen-eliminating device; 5, low-pressure coal saver; 6, booster water pump; 7. the first valve, 8. the second valve, 9. the 4th valve, 10. the 3rd valve.
Detailed description of the invention
Below in conjunction with accompanying drawing and embodiment, the utility model is described in further detail.
Be to be understood that, the purpose of this utility model is the improvement carried out the structure of low-pressure coal saver connected system, under the prerequisite that guarantee system is normally run, those skilled in the art according to actual conditions can select suitable low-pressure heater, low-pressure coal saver, booster water pump and valve type and by its exact connect ion.
Structure described in the utility model and method are applicable to the low-pressure heater be connected in series of more than 3 grades, and those skilled in the art can according to the progression of actual conditions choose reasonable low-pressure heater.In the present embodiment, the low-pressure heater of connecting successively for 3 grades, elaborates to the utility model concrete structure and method of work, and for the low-pressure heater that more than 4 grades are connected, those skilled in the art can know according to the utility model content.
As shown in Figure 1, a kind of low-pressure coal saver connected system being applied to Turbo-generator Set, comprise: the #1 low-pressure heater 1 of connecting successively, #2 low-pressure heater 2, #3 low-pressure heater 3, oxygen-eliminating device 4, the import of #1 low-pressure heater is connected with the entrance of booster water pump 6 with the second valve 8 respectively by the first valve 7 with outlet, the outlet of booster water pump 6 is connected with the entrance of low-pressure coal saver 5, and the outlet of low-pressure coal saver is connected with the export and import of #3 low-pressure heater 3 with the 3rd valve 10 respectively by the 4th valve 9.#3 low-pressure heater 3 is connected with oxygen-eliminating device.
The working method of the utility model low-pressure coal saver connected system is as follows:
The water temperature and the flow that enter low-pressure coal saver 5 is regulated by the first valve 7 and the second valve 8, to ensure low-pressure coal saver 5 inlet tube wall temperature higher than producer's design minimum temperature as 70 DEG C (ensureing that tube wall does not produce cold end corrosion higher than this temperature), ensure that low-pressure coal saver 5 exports cigarette temperature higher than flue gas acid dew point temperature as 100 DEG C, after adjusting above, this low-pressure economizer system reaches maximum at the caloric receptivity of boiler back end ductwork.
If low-pressure coal saver 5 leaving water temperature is higher than the leaving water temperature of #3 low-pressure heater 3, close the 3rd valve 10, open the 4th valve 9, low-pressure coal saver 5 water outlet all causes the outlet of #3 low-pressure heater 3, and now this low-pressure economizer system can bring unit maximum amount of energy saving.
If low-pressure coal saver 5 leaving water temperature is lower than the leaving water temperature of #3 low-pressure heater 3, close the 4th valve 9, open the 3rd valve 10, low-pressure coal saver 5 water outlet all causes the import of #3 low-pressure heater 3, and now this low-pressure economizer system can bring unit maximum amount of energy saving.
By reference to the accompanying drawings detailed description of the invention of the present utility model is described although above-mentioned; but the restriction not to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection domain of the present utility model.

Claims (3)

1. a low-pressure coal saver connected system, is characterized in that, comprising: the some grades of low-pressure heaters be sequentially connected in series, booster water pump and low-pressure coal saver; The water inlet of described first order low-pressure heater is connected with the water inlet of described booster water pump by the first valve, the delivery port of first order low-pressure heater is connected with the water inlet of described booster water pump by the second valve, the delivery port of described booster water pump is connected with low-pressure coal saver water inlet, low-pressure coal saver delivery port is connected by the water inlet of the 3rd valve with most final stage low-pressure heater, and low-pressure coal saver delivery port passes through the 4th valve and is connected with the delivery port of most final stage low-pressure heater.
2. a kind of low-pressure coal saver connected system as claimed in claim 1, it is characterized in that, at least three grades of low-pressure heaters are sequentially connected in series.
3. a kind of low-pressure coal saver connected system as claimed in claim 1, is characterized in that, described most end grade low-temp heater is connected with oxygen-eliminating device.
CN201520610743.0U 2015-08-13 2015-08-13 Low pressure economizer connected system Active CN204922936U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201520610743.0U CN204922936U (en) 2015-08-13 2015-08-13 Low pressure economizer connected system

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Application Number Priority Date Filing Date Title
CN201520610743.0U CN204922936U (en) 2015-08-13 2015-08-13 Low pressure economizer connected system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042564A (en) * 2015-08-13 2015-11-11 山东电力研究院 Low-pressure economizer connection system and method
CN107101192A (en) * 2017-05-02 2017-08-29 国网山东省电力公司电力科学研究院 The low-level (stack-gas) economizer system and thermal power plant unit of a kind of thermal power plant unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105042564A (en) * 2015-08-13 2015-11-11 山东电力研究院 Low-pressure economizer connection system and method
CN107101192A (en) * 2017-05-02 2017-08-29 国网山东省电力公司电力科学研究院 The low-level (stack-gas) economizer system and thermal power plant unit of a kind of thermal power plant unit
CN107101192B (en) * 2017-05-02 2019-03-01 国网山东省电力公司电力科学研究院 A kind of the low-level (stack-gas) economizer system and thermal power plant unit of thermal power plant unit

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C14 Grant of patent or utility model
GR01 Patent grant
CP01 Change in the name or title of a patent holder
CP01 Change in the name or title of a patent holder

Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong

Patentee after: SHANDONG ELECTRIC POWER Research Institute

Patentee after: SHANDONG ZHONGSHI YITONG GROUP Co.,Ltd.

Patentee after: STATE GRID CORPORATION OF CHINA

Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong

Patentee before: SHANDONG ELECTRIC POWER Research Institute

Patentee before: SHANDONG ZHONGSHI YITONG GROUP Co.,Ltd.

Patentee before: State Grid Corporation of China

TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20220214

Address after: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong

Patentee after: ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER Co.

Patentee after: SHANDONG ZHONGSHI YITONG GROUP Co.,Ltd.

Patentee after: STATE GRID CORPORATION OF CHINA

Address before: 250003 No. 2000, Wang Yue Road, Shizhong District, Ji'nan, Shandong

Patentee before: SHANDONG ELECTRIC POWER Research Institute

Patentee before: SHANDONG ZHONGSHI YITONG GROUP Co.,Ltd.

Patentee before: STATE GRID CORPORATION OF CHINA