CN203823740U - Heating network heater drainage system for supercritical nit - Google Patents
Heating network heater drainage system for supercritical nit Download PDFInfo
- Publication number
- CN203823740U CN203823740U CN201420105319.6U CN201420105319U CN203823740U CN 203823740 U CN203823740 U CN 203823740U CN 201420105319 U CN201420105319 U CN 201420105319U CN 203823740 U CN203823740 U CN 203823740U
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- Prior art keywords
- chemical
- water
- drainage
- hydrophobic
- drain
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- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 122
- 239000000126 substance Substances 0.000 claims abstract description 58
- 230000002209 hydrophobic effect Effects 0.000 claims description 49
- 238000010304 firing Methods 0.000 claims description 39
- 230000008676 import Effects 0.000 claims description 8
- 230000006698 induction Effects 0.000 claims description 6
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000011282 treatment Methods 0.000 description 4
- 239000011347 resin Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001764 infiltration Methods 0.000 description 2
- 238000000108 ultra-filtration Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Physical Water Treatments (AREA)
Abstract
The utility model discloses a heating network heater drainage system for supercritical, which is applied to a drainage processing system of a thermal power plant unit and comprises a heating network heater and a condensed water conveying system which are communicated by a drainage pipeline. The drainage pipeline is communicated with a condensed water output pipeline of the condensed water conveying system; the tail end of the condensed water output pipeline is communicated with a chemical precision processing device; a heating network drainage pump is arranged in the drainage pipeline; chemical raw water heating equipment is arranged on the drainage pipeline between the heating network drainage pump and the heating network heater; and a drainage bypass directly communicated with the heating network drainage pump and the heating network heater is arranged in parallel beside the chemical raw water heating equipment. According to the utility model, auxiliary steam for heating chemical raw water is saved, the drainage temperature of the heating network heater is reduced, heat is reasonably recovered, a high-quality working medium is saved, thermal efficiency of a power plant is improved and the service life of the chemical precision processing device is prolonged.
Description
Technical field
The utility model relates to a kind of steam power plant unit hydrophobic treatments system, particularly a kind of supercritical unit heat exchangers for district heating hydrophobic treatments system.
Background technology
Heat exchangers for district heating hydrophobic treatments system is the important component part of heat network system, and its system configuration is related to safety and the economical operation of heat network system and whole therrmodynamic system.For the following heating unit of subcritical 300MW level, heat exchangers for district heating is hydrophobic directly enters higher-pressure deaerator through drainage pump, realizes Btu utilization.For the overcritical heat supply unit of 350MW, because boiler does not connect blowdown, the safe and stable operation impact of the product confrontation unit of boiler feedwater greatly.In " thermal power plant design discipline ", to supercritical unit condensate water, processing has clear and definite regulation, and the condensate water that requires supercritical unit to enter boiler must all be carried out precision processing, to meet the requirement of boiler feedwater and quality of steam standard.According to above requirement, the current general heat supply network of domestic contrast adds thermal drain scheme and is: drain cooler is set on heat exchangers for district heating, heat supply network is hydrophobic after drain cooler enters condensate pump, condensing water conduit before chemistry precision processing, after fully mixing with condensate water, enter oxygen-eliminating device through chemical accurate process equipment, reach the object of Btu utilization, as shown in Figure 1.Part heat during the method waste high temperature is hydrophobic, and heat supply network drain temperature often requires the upper limit of long-term safety running temperature higher than chemical accurate process equipment.
For the overcritical heat supply unit of 350MW, for meeting the requirement of boiler feedwater and quality of steam standard, need to carry out chemical precision processing to condensate water, the negative resin in chemical precision processing device is met high temperature and is easily decomposed, and temperature is had to certain claimed range.Heat exchangers for district heating hydrophobic after drain cooler approximately 80 DEG C of temperature, in the time that the heating amount of drawing gas is large, certainly will cause unit condensing capacity less, after access condensate system is fully mixed with condensate water, condensing water temperature is by >60 DEG C, negative resin at this temperature in chemical precision processing device easily decomposes, cause precision processing therrmodynamic system below to have very large security risk, ensure that the hydrophobic and mixed water temperature of condensate water reaches the temperature requirement of chemical precision processing device so need to reduce drain temperature.
Utility model content
The utility model technical issues that need to address are to provide a kind of supercritical unit heat exchangers for district heating hydrophobic treatments system, for reducing the drain temperature of sending into chemical accurate process equipment, extend the service life of chemical accurate process equipment.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows:
Supercritical unit heat exchangers for district heating draining system, comprise the heat exchangers for district heating and the condensate water induction system that are communicated with by drain water piping, described drain water piping is communicated with the condensate water output channel of condensate water induction system, the end of condensate water output channel is communicated with chemical precision processing device, in described drain water piping, be provided with heat supply network drainage pump, on the drain water piping between described heat supply network drainage pump and heat exchangers for district heating, be provided with chemical unboiled water firing equipment; Described chemical unboiled water firing equipment is surface-type heat exchanger, hydrophobic import and the hydrophobic exit of chemistry unboiled water firing equipment are respectively provided with an electronic isolating valve, the side of described chemical unboiled water firing equipment is arranged in parallel the drain by-pass of direct connection heat supply network drainage pump and heat exchangers for district heating, is provided with electronic isolating valve in drain by-pass.
Owing to having adopted technique scheme, the technological progress that the utility model is obtained is as follows:
The utility model has been saved chemical unboiled water heating auxiliary steam, has reduced heat exchangers for district heating drain temperature, the service life of rationally having reclaimed heat, having saved high-quality working medium, having improved power plant thermal efficiency and chemical accurate process equipment.
The utility model adopts chemical unboiled water firing equipment, and hydrophobic the high temperature of heat exchangers for district heating discharge and chemical unboiled water are carried out to heat exchange, reduces drain temperature, saves chemical unboiled water heating auxiliary steam, increases condensing capacity.Chemistry unboiled water firing equipment adopts surface heater, and hydrophobic and chemical unboiled water does not directly contact, and prevents hydrophobic pollution, ensures hydrophobic quality.The chemistry hydrophobic import of unboiled water firing equipment and hydrophobic outlet are respectively provided with an electric control valve, the hydrophobic inflow and outflow of the chemical unboiled water firing equipment of convenient control.Chemistry unboiled water firing equipment side is provided with the drain by-pass of direct connection heat supply network drainage pump and heat exchangers for district heating, in drain by-pass, be provided with electronic isolating valve, in the time not needing to add heat chemistry unboiled water or chemical unboiled water firing equipment and break down, short circuit chemistry unboiled water firing equipment, guarantee system is normally moved.
Hydrophobic and chemical unboiled water carries out temperature after heat exchange and reduces, and hydrophobicly mixes with condensate water at condensing water conduit.Because the steam extracting from Steam Turbine reduces, the steam condensation water yield increases, temperature hydrophobic and the mixed condensation by mixing water of condensate water reduces, lower than the normal working temperature of negative resin in chemical accurate process equipment, ensure therrmodynamic system safe operation, simultaneously hydrophobic impure few, the working medium quality of guarantee condensate water chemistry precision processing.
The utility model only need be by chemical unboiled water firing equipment access drain water piping, and equipment investment is little, simple in structure, is convenient to realize.
Brief description of the drawings
Fig. 1: conventional heat exchangers for district heating hydrophobic enter condensate system figure;
Fig. 2: structural representation of the present utility model.
Wherein: 1, heat exchangers for district heating, 2, chemical unboiled water firing equipment, 3, heat supply network drainage pump, 4, condensate pump, 5, chemical precision processing device, 6, check-valves, 7, electronic isolating valve, 8, electric control valve, 9, switch; 6-1 is that the first check-valves, 6-2 are the second check-valves, and 7-1 is that the first electronic isolating valve, 7-2 are that the second electronic isolating valve, 7-3 are that the 3rd electronic isolating valve, 7-4 are that the 4th electronic isolating valve, 7-5 are the 5th electronic isolating valve.
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is done further to describe in detail:
Supercritical unit heat exchangers for district heating draining system, its structure as shown in Figure 2, comprise the heat exchangers for district heating 1 and the condensate water induction system that are communicated with by drain water piping, described drain water piping is communicated with the condensate water output channel of condensate water induction system, and the end of condensate water output channel is communicated with chemical precision processing device 5; In described drain water piping, be provided with heat supply network drainage pump 3, on the drain water piping between described heat supply network drainage pump 3 and heat exchangers for district heating 1, be provided with chemical unboiled water firing equipment 2; Described chemical unboiled water firing equipment 2 is surface-type heat exchanger, hydrophobic import and the hydrophobic exit of chemistry unboiled water firing equipment 2 are respectively equipped with the second electronic isolating valve 7-2 and the 3rd electronic isolating valve 7-3, the side of described chemical unboiled water firing equipment 2 is arranged in parallel the drain by-pass of direct connection heat supply network drainage pump 3 and heat exchangers for district heating 1, is provided with the 4th electronic isolating valve 7-4 in drain by-pass.
In the utility model, heat exchangers for district heating 1 is connected with steam turbine by jet chimney, carry out Heating Cyclic water system by the steam extracting in steam turbine, high temperature that heat exchangers for district heating 1 produces is hydrophobic arrives chemical unboiled water firing equipment 2 through drain water piping, the hydrophobic hydrophobic import through chemical unboiled water firing equipment 2 of high temperature enters chemical unboiled water firing equipment 2, and carry out heat exchange with chemical unboiled water wherein, chemistry unboiled water firing equipment 2 adopts surface-type heat exchanger, avoid chemical unboiled water directly to contact with hydrophobic, discharge through the hydrophobic outlet of chemical unboiled water firing equipment 2 afterwards, arrive heat supply network drainage pump 3 through drain water piping, after 3 pressurizations of heat supply network drainage pump, arrive condensate water output channel along drain water piping.Condensate water is pressed and delivered to condensate water output channel through condensate pump 4, and condensate water and hydrophobic in the output waterpipe mixing of condensing, enters chemical precision processing device 5 afterwards.
In the utility model, on heat exchangers for district heating 1 and drain water piping, be provided with the first electronic isolating valve 7-1, be used for controlling the break-make of heat exchangers for district heating 1 and drain water piping.In the utility model, can adopt multiple heat exchangers for district heating branch circuit parallel connection modes, by the hydrophobic multiple branch circuit high temperature drain water piping that is pooled to, then enter chemical unboiled water firing equipment 2.
In the utility model, the hydrophobic import of chemical unboiled water firing equipment 2 and hydrophobic outlet are respectively equipped with the second electronic isolating valve 7-2 and the 3rd electronic isolating valve 7-3, the second electronic isolating valve 7-2, chemical unboiled water firing equipment 2 and the 3rd electronic isolating valve 7-3 three are connected in series, and the second electronic isolating valve 7-2 and the 3rd electronic isolating valve 7-3 are used for controlling the hydrophobic inflow and outflow at chemical unboiled water firing equipment 2 of high temperature.The side of chemistry unboiled water firing equipment 2 is arranged in parallel the drain by-pass of direct connection heat supply network drainage pump 3 and heat exchangers for district heating 1, in drain by-pass, be provided with the 4th electronic isolating valve 7-4, in the time not needing to add heat chemistry unboiled water or meet chemical unboiled water firing equipment 2 fault, enable, make hydrophobic without chemical unboiled water firing equipment 2 until heat supply network drainage pump 3.
In the utility model, the hydrophobic outlet of chemical unboiled water firing equipment 2 is communicated with 3 imports of heat supply network drainage pump, after 3 pressurizations of heat supply network drainage pump, arrive condensate water output channel along drain water piping from the hydrophobic of the hydrophobic outlet outflow of chemical unboiled water firing equipment 2, mix at condensate water output channel with the condensate water of pressurizeing through condensate pump 4.The outlet of heat supply network drainage pump 3 is provided with the first check-valves 6-1 that prevents hydrophobic refluence and the 5th electronic isolating valve 7-5 that controls pipeline break-make.Can multiple heat supply network drainage pump branch roads in parallel on the drain water piping of the hydrophobic port of export of chemistry unboiled water firing equipment 2, heat supply network drainage pump branch road in parallel imports hydrophobic output channel, on this hydrophobic output channel, be provided with switch 9 and electric control valve 8, be used for controlling break-make and the pipeline flow of hydrophobic output channel.This hydrophobic output channel end and condensate water output channel junction are also provided with the second check-valves 6-2, are used for preventing hydrophobic refluence.Hydrophobic and condensate water enters chemical precision processing device 5 after condensate water output channel mixes, and enters afterwards oxygen-eliminating device and carries out deoxygenation processing.Hydrophobic temperature reduction after chemical unboiled water firing equipment 2, arrives condensate water output channel and mixes rear temperature with condensate water lower than the chemical precision processing device 5 Maximum CW lasing temperature upper limits, and guarantee condensate fine is processed and carried out smoothly.
In the north for the overcritical heat supply unit of 350MW, if boiler feed water system has ultrafiltration, counter-infiltration system, in order to improve in the winter time the rate of recovery of ultrafiltration, counter-infiltration, operated by rotary motion raw water heating system, unboiled water is heated to 25 DEG C of left and right, the domestic unboiled water heat source generally adopting is auxiliary steam, and auxiliary steam is blended in unboiled water firing equipment after pressure and temperature reducing, and this kind of scheme wasted high-quality thermal source to a certain extent.The utility model adopts chemical unboiled water firing equipment 2 both to heat chemical unboiled water, has saved again unboiled water and has heated required auxiliary steam.
Claims (1)
1. supercritical unit heat exchangers for district heating draining system, comprise the heat exchangers for district heating (1) and the condensate water induction system that are communicated with by drain water piping, described drain water piping is communicated with the condensate water output channel of condensate water induction system, the end of condensate water output channel is communicated with chemical precision processing device (5), in described drain water piping, be provided with heat supply network drainage pump (3), it is characterized in that: on the drain water piping between described heat supply network drainage pump (3) and heat exchangers for district heating (1), be provided with chemical unboiled water firing equipment (2); Described chemical unboiled water firing equipment (2) is surface-type heat exchanger, hydrophobic import and the hydrophobic exit of chemistry unboiled water firing equipment (2) are respectively equipped with the second electronic isolating valve (7-2) and the 3rd electronic isolating valve (7-3), the side of described chemical unboiled water firing equipment (2) is arranged in parallel the drain by-pass of direct connection heat supply network drainage pump (3) and heat exchangers for district heating (1), is provided with the 4th electronic isolating valve (7-4) in drain by-pass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105319.6U CN203823740U (en) | 2014-03-10 | 2014-03-10 | Heating network heater drainage system for supercritical nit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420105319.6U CN203823740U (en) | 2014-03-10 | 2014-03-10 | Heating network heater drainage system for supercritical nit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203823740U true CN203823740U (en) | 2014-09-10 |
Family
ID=51479233
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420105319.6U Expired - Lifetime CN203823740U (en) | 2014-03-10 | 2014-03-10 | Heating network heater drainage system for supercritical nit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203823740U (en) |
-
2014
- 2014-03-10 CN CN201420105319.6U patent/CN203823740U/en not_active Expired - Lifetime
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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: 050031 No. 6 Jianbei Street, Chang'an District, Shijiazhuang City, Hebei Province Patentee after: POWERCHINA HEBEI ELECTRIC POWER ENGINEERING Co.,Ltd. Address before: 050031 No. 6 Jianbei Street, Chang'an District, 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: 20140910 |
|
| CX01 | Expiry of patent term |