CN104832908A - Combination system and combination method for phase-change heat exchanger with heating network heater - Google Patents
Combination system and combination method for phase-change heat exchanger with heating network heater Download PDFInfo
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- CN104832908A CN104832908A CN201510207448.5A CN201510207448A CN104832908A CN 104832908 A CN104832908 A CN 104832908A CN 201510207448 A CN201510207448 A CN 201510207448A CN 104832908 A CN104832908 A CN 104832908A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention relates to a combination system and a combination method for a phase-change heat exchanger with a heating network heater. There is no combination system or combination method for the phase-change heat exchanger with the heating network heater, which has the advantage of reasonable structural design at present. The combination system provided by the invention is characterized in that one end of a primary heating network high-temperature water inlet main pipe is connected with a phase-change heat-exchanging steam pocket high-temperature water outlet main pipe; the other end of the primary heating network high-temperature water inlet main pipe is connected with a primary heating network high-temperature water inlet; one end of a primary heating network low-temperature water outlet main pipe is connected with a phase-change heat-exchanging steam pocket low-temperature water inlet main pipe; the other end of the primary heating network low-temperature water outlet main pipe is connected with a primary heating network low-temperature water outlet. The combination method is characterized in that when a machine unit operates in a non-heating period in summer, the operation of the heating network heater is cut off by means of turning off a primary heating network high-temperature water inlet shutoff valve and a primary heating network low-temperature water outlet shutoff valve, and condensed water heated by the combination system is all returned to an original low-temperature heating system. The combination system and the combination method for the phase-change heat exchanger with the heating network heater have the advantages that not only can waste heat of flue gas be recycled, and the exhaust flue gas temperature is reduced, but also the operation of heating heat supply water by a heating station of an original power plant can be replaced or partially replaced, so that the maximization of the benefits is realized.
Description
Technical field
The present invention relates to a kind of association system and integrated processes of phase-change heat-exchanger band heat exchangers for district heating, be used for heating heat supply water with phase-change heat-exchanger Mist heat recovering, belong to a kind of flue gas waste heat recovery and reutilization system.
Background technology
As everyone knows, heat loss due to exhaust gas is one maximum in boiler various heat losses, accounts for 60% ~ 70% of boiler heat loss.The principal element affecting heat loss due to exhaust gas is exhaust gas temperature, reduces exhaust gas temperature and pollutes have important practical significance for saving fuel, reduction.Have the power plant of heat supply task for the north, in the winter time heating period, Mist heat recovering is for heating heat supply network circulation; At unit non-heating period, Mist heat recovering is used for heat-setting water.When Coal-fired capacity is constant, heating period in the winter time, Mist heat recovering is for heating heat supply network circulation, and the heating that can reduce unit is drawn gas; At unit non-heating period, Mist heat recovering is used for heat-setting water, reduces the unit amount of drawing gas.Unit output increases, and generated energy increases, and benefit improves.
Also there are now some flue gas waste heat recoveries and reutilization system and method, if publication date is on October 19th, 2011, publication number is in the Chinese patent of CN102220888A, disclose a kind of recovering circulating water residual heat of thermal power plants and system, this system comprises absorption heat pump, steam turbine, condenser, basic heat exchangers for district heating, peak load calorifier, auxiliary piping and equipment thereof, cooperation control and protection system, absorption heat pump reclaims the waste heat of condenser recirculated water, and major network heat supply network backwater is heated, basic heat exchangers for district heating heats the major network heat supply network backwater after absorption heat pump heating, peak load calorifier is transported to heat supply network user after heating the major network heat supply network backwater after basic heat exchangers for district heating heating again, auxiliary piping connects steam turbine, condenser, absorption heat pump, basic heat exchangers for district heating, peak load calorifier, auxiliary equipment, cooperation control and protection system control operation and the safety of each equipment in this system, utilize absorption heat pump to reclaim condenser recirculated water and be discharged into heat in air, and the heating of the steam power plant energy level that draws gas is integrated, save the energy of steam power plant, improve heat capacity and the economy of steam power plant, this system is not in conjunction with phase-change heat-exchanger, be difficult to realize maximizing the benefits.And for example publication date is on 09 24th, 2014, publication number is in the Chinese patent of CN104063592A, disclose one and utilize phase-change heat-exchanger recovery boiler fume afterheat method for determination of amount, this defining method comprises step to be had: heat Calculation more than (1) phase-change heat-exchanger absorbs from boiler smoke: reduce No. 8 low-pressure heaters and No. 7 low-pressure heater extraction flows calculating after (2) phase-change heat-exchanger heating part condensate water: (3) No. 7 low-pressure heaters and No. 8 low-pressure heaters reduce the amounts of drawing gas increases generated energy calculating after generating electricity: (4) utilize phase-change heat-exchanger recovery boiler fume afterheat amount of energy saving to calculate, the method is for utilizing phase-change heat-exchanger recovery boiler fume afterheat for heating the condensate pump outlet entered before No. 8 low-pressure heaters, condensate water after heating is incorporated to condensate water main pipeline No. 7 low-pressure heater outlets, so just can reduce No. 8 low-pressure heaters and No. 7 low-pressure heater extraction flows, the part extraction flow reduced is used for generating, increase generator power, reduce coal-fired consumption, the method is not in conjunction with heat exchangers for district heating, be difficult to realize maximizing the benefits.
In sum, also there is no a kind of reasonable in design at present, dependable performance, exhaust gas temperature can either be reduced by Mist heat recovering, avoid heat exchanger heat exchange wall generation cold end corrosion, can replace again or partly replace association system and the integrated processes that former power plant heat station heats heat supply water realizes the phase-change heat-exchanger band heat exchangers for district heating of maximizing the benefits.
Summary of the invention
The object of the invention is to overcome above shortcomings in prior art, and a kind of reasonable in design is provided, dependable performance, exhaust gas temperature can either be reduced by Mist heat recovering, avoid heat exchanger heat exchange wall generation cold end corrosion, can replace again or partly replace association system and the integrated processes that former power plant heat station heats heat supply water realizes the phase-change heat-exchanger band heat exchangers for district heating of maximizing the benefits.
The present invention's adopted technical scheme that solves the problem is: the association system of this phase-change heat-exchanger band heat exchangers for district heating comprises flue gases duct, phase-change heat-exchanger, phase-change heat-exchange drum low temperature water inlet electric control valve, the female pipe of phase-change heat-exchange drum low temperature water inlet, phase-change heat-exchange drum high-temperature water outlet mother pipe, phase-change heat-exchange drum, tedge, down-comer, down-comer medium temperature measurer and flue gas temperature measurer, described phase-change heat-exchanger is provided with upcast header and downcomer header, described phase-change heat-exchange drum is provided with saturated vapor entrance, condensation-water drain, high-temperature water outlet mouth and low temperature water inlet, described phase-change heat-exchanger is arranged in flue gases duct, described flue gas temperature measurer be arranged on phase-change heat-exchanger after flue gases duct on, described phase-change heat-exchange drum is positioned at the top of flue gases duct, the upper end of described down-comer is connected on condensation-water drain, the lower end of this down-comer is connected on downcomer header, described down-comer medium temperature measurer is arranged on down-comer, the upper end of described tedge is connected on saturated vapor entrance, the lower end of this tedge is connected on upcast header, intake one end of female pipe of described phase-change heat-exchange drum low temperature is connected on low temperature water inlet, described phase-change heat-exchange drum low temperature water inlet electric control valve is arranged on phase-change heat-exchange drum low temperature and intakes on female pipe, one end of the female pipe of described phase-change heat-exchange drum high-temperature water outlet is connected on high-temperature water outlet mouth, its design feature is: also comprise heating plant backwater mother pipe, heating plant main water outlet pipe, water collector, water knockout drum, second heat net high-temperature medium temperature measurer, the female pipe of secondary heat supply network low temperature water inlet, second heat net height temperature main water outlet pipe, heat exchangers for district heating, a heat supply network high-temperature inlet water electric control valve, a heat supply network high-temperature inlet water mother pipe, a heat supply network low temperature main water outlet pipe, a heat supply network high-temperature inlet water shut-off valve and a heat supply network low temperature water outlet shut-off valve, described heat exchangers for district heating is provided with a heat supply network high-temperature water entrance, a heat supply network water at low temperature outlet, secondary heat supply network water at low temperature entrance and the outlet of second heat net height warm water, one end of the female pipe of a described heat supply network high-temperature inlet water is connected on the female pipe of phase-change heat-exchange drum high-temperature water outlet, the other end of the female pipe of this heat supply network high-temperature inlet water is connected on a heat supply network high-temperature water entrance, a described heat supply network high-temperature inlet water electric control valve and a heat supply network high-temperature inlet water shut-off valve are installed on a female pipe of heat supply network high-temperature inlet water, one end of a described heat supply network low temperature main water outlet pipe is connected to phase-change heat-exchange drum low temperature and intakes on female pipe, the other end of this heat supply network low temperature main water outlet pipe is connected in a heat supply network water at low temperature outlet, a described heat supply network low temperature water outlet shut-off valve is arranged in a heat supply network low temperature main water outlet pipe, intake one end of female pipe of described secondary heat supply network low temperature is connected on water collector, the intake other end of female pipe of this secondary heat supply network low temperature is connected on secondary heat supply network water at low temperature entrance, one end of the female pipe of described heating plant backwater is connected on water collector, one end of described second heat net height temperature main water outlet pipe is connected on water knockout drum, the other end of this second heat net height temperature main water outlet pipe is connected in the outlet of second heat net height warm water, described second heat net high-temperature medium temperature measurer is arranged in second heat net height temperature main water outlet pipe, one end of described heating plant main water outlet pipe is connected on water knockout drum.
As preferably, association system of the present invention also comprises the manually-operated gate for building the pressure be arranged on the female pipe of phase-change heat-exchange drum high-temperature water outlet.
As preferably, association system of the present invention also comprises terminal control unit, and described second heat net high-temperature medium temperature measurer, heat supply network high-temperature inlet water electric control valve, the water inlet of phase-change heat-exchange drum low temperature electric control valve, down-comer medium temperature measurer and a flue gas temperature measurer are all connected on terminal control unit by wire.
As preferably, a heat supply network high-temperature inlet water shut-off valve of the present invention and a heat supply network high-temperature inlet water electric control valve flow to direction along medium and are arranged in order.
As preferably, the female pipe of heating plant backwater of the present invention, heating plant main water outlet pipe, the female pipe of secondary heat supply network low temperature water inlet and second heat net height temperature main water outlet pipe are all provided with valve.
As preferably, phase-change heat-exchange drum of the present invention is positioned at directly over phase-change heat-exchanger.
As preferably, a heat supply network high-temperature inlet water shut-off valve of the present invention and a heat supply network low temperature water outlet shut-off valve are hand-operated valve structure.
A kind of feature of integrated processes of phase-change heat-exchanger band heat exchangers for district heating is: described integrated processes is as follows: on flue gases duct, be provided with phase-change heat-exchanger, the flue gases duct of phase-change heat-exchanger afterbody is provided with flue gas temperature measurer, phase-change heat-exchange drum is placed in outside flue gases duct, and be positioned at the top of phase-change heat-exchanger, between phase-change heat-exchange drum and phase-change heat-exchanger, height of formation is poor, phase-change heat-exchange drum is connected with phase-change heat-exchanger with down-comer by tedge, form a closed loop, the saturated vapor that phase-change heat-exchanger produces is pooled in phase-change heat-exchange drum by tedge, condensate water to be intake female pipe access phase-change heat-exchange drum by phase-change heat-exchange drum low temperature, after carrying out heat exchange with saturated vapor, saturated vapor heat exchange is cooled to heat-exchange working medium, under gravity, phase-change heat-exchanger is back to by down-comer, down-comer medium temperature measurer on down-comer is for monitoring the medium temperature in down-comer, when flue-gas temperature or down-comer medium temperature do not meet setting required value, by regulating the aperture of phase-change heat-exchange drum low temperature water inlet electric control valve, and then regulate low-temperature condensate to enter the flow of phase-change heat-exchange drum, exhaust gas temperature or down-comer medium temperature are met the demands, low-temperature condensate is picked out by the female pipe of phase-change heat-exchange drum high-temperature water outlet after the heat exchange of phase-change heat-exchange drum, the condensed water in high temperature that during the winter heating phase, the female pipe of phase-change heat-exchange drum high-temperature water outlet picks out is partly or entirely via heat supply network high-temperature inlet water female pipe access heat exchangers for district heating, heating plant backwater is successively through heating plant backwater mother pipe, water collector and secondary heat supply network low temperature intake female pipe access heat exchangers for district heating, after condensed water in high temperature heat exchange, successively through second heat net height temperature main water outlet pipe, water knockout drum and heating plant female pipe of intaking picks out, low-temperature condensate in heat exchangers for district heating after heat exchange accesses the female pipe of phase-change heat-exchange drum low temperature water inlet by a heat supply network low temperature main water outlet pipe, finally enter phase-change heat-exchange drum, circulation like this, second heat net high-temperature medium temperature measurer is for monitoring the second heat net height temperature leaving water temperature of heat exchangers for district heating, when leaving water temperature does not meet user's required value, by regulating the aperture of a heat supply network high-temperature inlet water electric control valve, and then regulate the condensed water in high temperature flow entering heat exchangers for district heating, secondary heat supply network leaving water temperature is met the demands, when unit in summer non-heating period runs, cut off the operation of heat exchangers for district heating by turning off a heat supply network high-temperature inlet water shut-off valve and heat supply network low temperature water outlet shut-off valve, the condensate water that association system has heated all returns former low adding system.
As preferably, down-comer medium temperature measurer on down-comer of the present invention is for monitoring the medium temperature in down-comer, when flue-gas temperature or down-comer medium temperature do not meet setting required value, signal feedback is to terminal control, by regulating phase-change heat-exchange drum low temperature water inlet motorized adjustment valve opening, and then regulate low-temperature condensate to enter the flow of phase-change heat-exchange drum, exhaust gas temperature or down-comer medium temperature are met the demands; Second heat net high-temperature medium temperature measurer is for monitoring the second heat net height temperature leaving water temperature of heat exchangers for district heating, when leaving water temperature does not meet user's required value, signal feedback is to terminal control, by regulating the aperture of a heat supply network high-temperature inlet water electric control valve, and then regulate the condensed water in high temperature flow entering heat exchangers for district heating, secondary heat supply network leaving water temperature is met the demands.
As preferably, second heat net high-temperature medium temperature measurer of the present invention is for monitoring the second heat net height temperature leaving water temperature of heat exchangers for district heating, when leaving water temperature does not meet user's required value, signal feedback is to terminal control, by regulating the aperture of a heat supply network high-temperature inlet water electric control valve, and then regulate the condensed water in high temperature flow entering heat exchangers for district heating, secondary heat supply network leaving water temperature is met the demands, if cannot meet the demands, manually turn down manually-operated gate and regulate further.
The present invention compared with prior art, has the following advantages and effect: 1, association system can realize heat-setting in summer water and heat the flexible switching between supplying hot water winter, can realize maximizing the benefits; 2, association system has all advantages of phase-change heat-exchange technology concurrently: heat exchange efficiency and intensity obtain significant raising relative to traditional heat exchangers on the one hand, greatly can reduce size of heat exchanger, saves heat exchanger materials, saves heat exchanger cost; Phase-change heat-exchanger heat exchange wall cold end corrosion etc. can be avoided on the other hand; 3, reasonable in design, by pipeline, valve and temperature measurer, phase-change heat-exchanger and heat exchangers for district heating are combined, make the present invention can either Mist heat recovering heat-setting in summer water, heat supply water can be heated winter again, greatly improve the benefit of the simple heat-setting water of residual neat recovering system.
Accompanying drawing explanation
Fig. 1 is the structural representation of the association system of phase-change heat-exchanger band heat exchangers for district heating in the embodiment of the present invention.
In figure: 1-flue gases duct, 2-phase-change heat-exchanger, 3-heating plant backwater mother pipe, 4-heating plant main water outlet pipe, 5-water collector, 6-water knockout drum, 7-second heat net high-temperature medium temperature measurer, 8-bis-female pipes of heat supply network low temperature water inlet, 9-second heat net height temperature main water outlet pipe, 10-terminal control unit, 11-heat exchangers for district heating, 12-heat supply network high-temperature inlet water electric control valve, 13-heat supply network high-temperature inlet water mother pipe, 14-heat supply network low temperature main water outlet pipe, 15-phase-change heat-exchange drum low temperature water inlet electric control valve, the female pipe of 16-phase-change heat-exchange drum low temperature water inlet, 17-phase-change heat-exchange drum high-temperature water outlet mother pipe, 18-phase-change heat-exchange drum, 19-tedge, 20-upcast header, 21-downcomer header, 22-down-comer, 23-down-comer medium temperature measurer, 24-heat supply network high-temperature inlet water shut-off valve, 25-heat supply network low temperature water outlet shut-off valve, 26-saturated vapor entrance, 27-condensation-water drain, 28-heat supply network high-temperature water entrance, a 29-heat supply network water at low temperature outlet, 30-bis-heat supply network water at low temperature entrances, 31-second heat net height warm water exports, 32-flue gas temperature measurer, 33-high-temperature water outlet mouth, 34-low temperature water inlet, 35-manually-operated gate.
Detailed description of the invention
Below in conjunction with accompanying drawing, also by embodiment, the present invention is described in further detail, and following examples are explanation of the invention and the present invention is not limited to following examples.
Embodiment.
See Fig. 1, in the present embodiment, the association system of phase-change heat-exchanger band heat exchangers for district heating comprises flue gases duct 1, phase-change heat-exchanger 2, the female pipe 3 of heating plant backwater, heating plant main water outlet pipe 4, water collector 5, water knockout drum 6, second heat net high-temperature medium temperature measurer 7, secondary heat supply network low temperature is intake female pipe 8, second heat net height temperature main water outlet pipe 9, terminal control unit 10, heat exchangers for district heating 11, a heat supply network high-temperature inlet water electric control valve 12, a female pipe 13 of heat supply network high-temperature inlet water, a heat supply network low temperature main water outlet pipe 14, phase-change heat-exchange drum low temperature water inlet electric control valve 15, phase-change heat-exchange drum low temperature is intake female pipe 16, the female pipe 17 of phase-change heat-exchange drum high-temperature water outlet, phase-change heat-exchange drum 18, tedge 19, down-comer 22, down-comer medium temperature measurer 23, a heat supply network high-temperature inlet water shut-off valve 24, a heat supply network low temperature water outlet shut-off valve 25, flue gas temperature measurer 32 and manually-operated gate 35, wherein, a heat supply network high-temperature inlet water shut-off valve 24 and a heat supply network low temperature water outlet shut-off valve 25 are hand-operated valve structure.
Phase-change heat-exchanger 2 in the present embodiment is provided with upcast header 20 and downcomer header 21, heat exchangers for district heating 11 is provided with 28, the heat supply network water at low temperature outlet 29 of a heat supply network high-temperature water entrance, secondary heat supply network water at low temperature entrance 30 and second heat net height warm water outlet 31, phase-change heat-exchange drum 18 is provided with saturated vapor entrance 26, condensation-water drain 27, high-temperature water outlet mouth 33 and low temperature water inlet 34.
Phase-change heat-exchanger 2 in the present embodiment is arranged in flue gases duct 1, flue gas temperature measurer 32 is arranged on the flue gases duct 1 after phase-change heat-exchanger 2, phase-change heat-exchange drum 18 is positioned at the top of flue gases duct 1, and phase-change heat-exchange drum 18 is usually located at directly over phase-change heat-exchanger 2.The upper end of down-comer 22 is connected on condensation-water drain 27, the lower end of this down-comer 22 is connected on downcomer header 21, down-comer medium temperature measurer 23 is arranged on down-comer 22, the upper end of tedge 19 is connected on saturated vapor entrance 26, and the lower end of this tedge 19 is connected on upcast header 20.
Intake one end of female pipe 16 of phase-change heat-exchange drum low temperature in the present embodiment is connected on low temperature water inlet 34, phase-change heat-exchange drum low temperature water inlet electric control valve 15 is arranged on phase-change heat-exchange drum low temperature and intakes on female pipe 16, one end of the female pipe 17 of phase-change heat-exchange drum high-temperature water outlet is connected on high-temperature water outlet mouth 33, manually-operated gate 35 is arranged on the female pipe 17 of phase-change heat-exchange drum high-temperature water outlet, and this manually-operated gate 35 plays the effect of building the pressure.
One end of the female pipe 13 of a heat supply network high-temperature inlet water in the present embodiment is connected on the female pipe 17 of phase-change heat-exchange drum high-temperature water outlet, one end of a female pipe 13 of heat supply network high-temperature inlet water is between high-temperature water outlet mouth 33 and manually-operated gate 35, the other end of a female pipe 13 of heat supply network high-temperature inlet water is connected on a heat supply network high-temperature water entrance 28, a heat supply network high-temperature inlet water electric control valve 12 and a heat supply network high-temperature inlet water shut-off valve 24 are installed on a female pipe 13 of heat supply network high-temperature inlet water, a heat supply network high-temperature inlet water shut-off valve 24 and a heat supply network high-temperature inlet water electric control valve 12 flow to direction along medium and are arranged in order.
One end of a heat supply network low temperature main water outlet pipe 14 in the present embodiment is connected to phase-change heat-exchange drum low temperature and intakes on female pipe 16, one end of a heat supply network low temperature main water outlet pipe 14 is between low temperature water inlet 34 and phase-change heat-exchange drum low temperature water inlet electric control valve 15, the other end of a heat supply network low temperature main water outlet pipe 14 is connected in a heat supply network water at low temperature outlet 29, and one time heat supply network low temperature water outlet shut-off valve 25 is arranged in a heat supply network low temperature main water outlet pipe 14.
Intake one end of female pipe 8 of secondary heat supply network low temperature in the present embodiment is connected on water collector 5, the intake other end of female pipe 8 of this secondary heat supply network low temperature is connected on secondary heat supply network water at low temperature entrance 30, one end of the female pipe 3 of heating plant backwater is connected on water collector 5, one end of second heat net height temperature main water outlet pipe 9 is connected on water knockout drum 6, the other end of this second heat net height temperature main water outlet pipe 9 is connected in second heat net height warm water outlet 31, second heat net high-temperature medium temperature measurer 7 is arranged in second heat net height temperature main water outlet pipe 9, one end of heating plant main water outlet pipe 4 is connected on water knockout drum 6.The female pipe 3 of heating plant backwater, heating plant main water outlet pipe 4, secondary heat supply network low temperature are intake in female pipe 8 and second heat net height temperature main water outlet pipe 9 and are usually all provided with valve.
The water inlet of second heat net high-temperature medium temperature measurer 7, heat supply network high-temperature inlet water electric control valve 12 in the present embodiment, phase-change heat-exchange drum low temperature electric control valve 15, down-comer medium temperature measurer 23 and flue gas temperature measurer 32 are all connected on terminal control unit 10 by wire.
In the present embodiment, the integrated processes of phase-change heat-exchanger band heat exchangers for district heating is as follows: on flue gases duct 1, be provided with phase-change heat-exchanger 2, the flue gases duct 1 of phase-change heat-exchanger 2 afterbody is provided with flue gas temperature measurer 32, phase-change heat-exchange drum 18 is placed in outside flue gases duct 1, and be positioned at the top of phase-change heat-exchanger 2, between phase-change heat-exchange drum 18 and phase-change heat-exchanger 2, height of formation is poor, phase-change heat-exchange drum 18 is connected with phase-change heat-exchanger 2 with down-comer 22 by tedge 19, form a closed loop, the saturated vapor that phase-change heat-exchanger 2 produces is pooled in phase-change heat-exchange drum 18 by tedge 19, condensate water accesses phase-change heat-exchange drum 18 by phase-change heat-exchange drum low temperature female pipe 16 of intaking, after carrying out heat exchange with saturated vapor, saturated vapor heat exchange is cooled to heat-exchange working medium, under gravity, phase-change heat-exchanger 2 is back to by down-comer 22, down-comer medium temperature measurer 23 on down-comer 22 is for monitoring the medium temperature in down-comer 22, when flue-gas temperature or down-comer medium temperature do not meet setting required value, signal feedback is to terminal control 10, by regulating the aperture of phase-change heat-exchange drum low temperature water inlet electric control valve 15, and then regulate low-temperature condensate to enter the flow of phase-change heat-exchange drum 18, exhaust gas temperature or down-comer medium temperature are met the demands.
Low-temperature condensate is picked out by the female pipe 17 of phase-change heat-exchange drum high-temperature water outlet after phase-change heat-exchange drum 18 heat exchange, the condensed water in high temperature that during the winter heating phase, the female pipe 17 of phase-change heat-exchange drum high-temperature water outlet picks out partly or entirely accesses heat exchangers for district heating 11 via a female pipe 13 of heat supply network high-temperature inlet water, heating plant backwater is successively through the female pipe 3 of heating plant backwater, water collector 5 and secondary heat supply network low temperature female pipe 8 of intaking accesses heat exchangers for district heating 11, after condensed water in high temperature heat exchange, successively through second heat net height temperature main water outlet pipe 9, water knockout drum 6 and heating plant female pipe 4 of intaking picks out, low-temperature condensate in heat exchangers for district heating 11 after heat exchange accesses phase-change heat-exchange drum low temperature by heat supply network low temperature main water outlet pipe 14 intakes female pipe 16, finally enter phase-change heat-exchange drum 18, circulation like this, second heat net high-temperature medium temperature measurer 7 is for monitoring the second heat net height temperature leaving water temperature of heat exchangers for district heating 11, when leaving water temperature does not meet user's required value, signal feedback is to terminal control 10, by regulating the aperture of a heat supply network high-temperature inlet water electric control valve 12, and then regulate the condensed water in high temperature flow entering heat exchangers for district heating 11, secondary heat supply network leaving water temperature is met the demands, if cannot meet the demands, manually turn down manually-operated gate 35 to regulate further.
When unit in summer non-heating period runs, cut off the operation of heat exchangers for district heating 11 by turning off a heat supply network high-temperature inlet water shut-off valve 24 and heat supply network low temperature water outlet shut-off valve 25, the condensate water that association system has heated all returns former low adding system.
Association system in the present embodiment and integrated processes can reduce exhaust gas temperature at Mist heat recovering, while avoiding heat exchanger heat exchange wall generation cold end corrosion, replace or partly replace former power plant heat station heats heat supply water, realizing maximizing the benefits.Association system is an organic whole, and design is unique, dependable performance.
In addition, it should be noted that, the specific embodiment described in this description, the shape, institute's title of being named etc. of its parts and components can be different, and the above content described in this description is only to structure example of the present invention explanation.The equivalence change that structure, feature and the principle of all foundations described in inventional idea of the present invention are done or simple change, be included in the protection domain of patent of the present invention.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment; only otherwise depart from structure of the present invention or surmount this scope as defined in the claims, protection scope of the present invention all should be belonged to.
Claims (10)
1. the association system of a phase-change heat-exchanger band heat exchangers for district heating, comprise flue gases duct, phase-change heat-exchanger, phase-change heat-exchange drum low temperature water inlet electric control valve, the female pipe of phase-change heat-exchange drum low temperature water inlet, phase-change heat-exchange drum high-temperature water outlet mother pipe, phase-change heat-exchange drum, tedge, down-comer, down-comer medium temperature measurer and flue gas temperature measurer, described phase-change heat-exchanger is provided with upcast header and downcomer header, described phase-change heat-exchange drum is provided with saturated vapor entrance, condensation-water drain, high-temperature water outlet mouth and low temperature water inlet, described phase-change heat-exchanger is arranged in flue gases duct, described flue gas temperature measurer be arranged on phase-change heat-exchanger after flue gases duct on, described phase-change heat-exchange drum is positioned at the top of flue gases duct, the upper end of described down-comer is connected on condensation-water drain, the lower end of this down-comer is connected on downcomer header, described down-comer medium temperature measurer is arranged on down-comer, the upper end of described tedge is connected on saturated vapor entrance, the lower end of this tedge is connected on upcast header, intake one end of female pipe of described phase-change heat-exchange drum low temperature is connected on low temperature water inlet, described phase-change heat-exchange drum low temperature water inlet electric control valve is arranged on phase-change heat-exchange drum low temperature and intakes on female pipe, one end of the female pipe of described phase-change heat-exchange drum high-temperature water outlet is connected on high-temperature water outlet mouth, it is characterized in that: also comprise heating plant backwater mother pipe, heating plant main water outlet pipe, water collector, water knockout drum, second heat net high-temperature medium temperature measurer, the female pipe of secondary heat supply network low temperature water inlet, second heat net height temperature main water outlet pipe, heat exchangers for district heating, a heat supply network high-temperature inlet water electric control valve, a heat supply network high-temperature inlet water mother pipe, a heat supply network low temperature main water outlet pipe, a heat supply network high-temperature inlet water shut-off valve and a heat supply network low temperature water outlet shut-off valve, described heat exchangers for district heating is provided with a heat supply network high-temperature water entrance, a heat supply network water at low temperature outlet, secondary heat supply network water at low temperature entrance and the outlet of second heat net height warm water, one end of the female pipe of a described heat supply network high-temperature inlet water is connected on the female pipe of phase-change heat-exchange drum high-temperature water outlet, the other end of the female pipe of this heat supply network high-temperature inlet water is connected on a heat supply network high-temperature water entrance, a described heat supply network high-temperature inlet water electric control valve and a heat supply network high-temperature inlet water shut-off valve are installed on a female pipe of heat supply network high-temperature inlet water, one end of a described heat supply network low temperature main water outlet pipe is connected to phase-change heat-exchange drum low temperature and intakes on female pipe, the other end of this heat supply network low temperature main water outlet pipe is connected in a heat supply network water at low temperature outlet, a described heat supply network low temperature water outlet shut-off valve is arranged in a heat supply network low temperature main water outlet pipe, intake one end of female pipe of described secondary heat supply network low temperature is connected on water collector, the intake other end of female pipe of this secondary heat supply network low temperature is connected on secondary heat supply network water at low temperature entrance, one end of the female pipe of described heating plant backwater is connected on water collector, one end of described second heat net height temperature main water outlet pipe is connected on water knockout drum, the other end of this second heat net height temperature main water outlet pipe is connected in the outlet of second heat net height warm water, described second heat net high-temperature medium temperature measurer is arranged in second heat net height temperature main water outlet pipe, one end of described heating plant main water outlet pipe is connected on water knockout drum.
2. the association system of phase-change heat-exchanger band heat exchangers for district heating according to claim 1, is characterized in that: described association system also comprises the manually-operated gate for building the pressure be arranged on the female pipe of phase-change heat-exchange drum high-temperature water outlet.
3. the association system of phase-change heat-exchanger band heat exchangers for district heating according to claim 1, it is characterized in that: described association system also comprises terminal control unit, described second heat net high-temperature medium temperature measurer, heat supply network high-temperature inlet water electric control valve, the water inlet of phase-change heat-exchange drum low temperature electric control valve, down-comer medium temperature measurer and a flue gas temperature measurer are all connected on terminal control unit by wire.
4. the association system of phase-change heat-exchanger band heat exchangers for district heating according to claim 1, is characterized in that: a described heat supply network high-temperature inlet water shut-off valve and a heat supply network high-temperature inlet water electric control valve flow to direction along medium and be arranged in order.
5. the association system of phase-change heat-exchanger band heat exchangers for district heating according to claim 1, is characterized in that: the female pipe of described heating plant backwater, heating plant main water outlet pipe, the female pipe of secondary heat supply network low temperature water inlet and second heat net height temperature main water outlet pipe are all provided with valve.
6. the association system of phase-change heat-exchanger band heat exchangers for district heating according to claim 1, is characterized in that: described phase-change heat-exchange drum is positioned at directly over phase-change heat-exchanger.
7. the association system of phase-change heat-exchanger band heat exchangers for district heating according to claim 1, is characterized in that: a described heat supply network high-temperature inlet water shut-off valve and a heat supply network low temperature water outlet shut-off valve are hand-operated valve structure.
8. the integrated processes adopting the association system of the phase-change heat-exchanger band heat exchangers for district heating as described in claim as arbitrary in claim 1-7 to carry out, it is characterized in that: described integrated processes is as follows: on flue gases duct, be provided with phase-change heat-exchanger, the flue gases duct of phase-change heat-exchanger afterbody is provided with flue gas temperature measurer, phase-change heat-exchange drum is placed in outside flue gases duct, and be positioned at the top of phase-change heat-exchanger, between phase-change heat-exchange drum and phase-change heat-exchanger, height of formation is poor, phase-change heat-exchange drum is connected with phase-change heat-exchanger with down-comer by tedge, form a closed loop, the saturated vapor that phase-change heat-exchanger produces is pooled in phase-change heat-exchange drum by tedge, condensate water to be intake female pipe access phase-change heat-exchange drum by phase-change heat-exchange drum low temperature, after carrying out heat exchange with saturated vapor, saturated vapor heat exchange is cooled to heat-exchange working medium, under gravity, phase-change heat-exchanger is back to by down-comer, down-comer medium temperature measurer on down-comer is for monitoring the medium temperature in down-comer, when flue-gas temperature or down-comer medium temperature do not meet setting required value, by regulating the aperture of phase-change heat-exchange drum low temperature water inlet electric control valve, and then regulate low-temperature condensate to enter the flow of phase-change heat-exchange drum, exhaust gas temperature or down-comer medium temperature are met the demands, low-temperature condensate is picked out by the female pipe of phase-change heat-exchange drum high-temperature water outlet after the heat exchange of phase-change heat-exchange drum, the condensed water in high temperature that during the winter heating phase, the female pipe of phase-change heat-exchange drum high-temperature water outlet picks out is partly or entirely via heat supply network high-temperature inlet water female pipe access heat exchangers for district heating, heating plant backwater is successively through heating plant backwater mother pipe, water collector and secondary heat supply network low temperature intake female pipe access heat exchangers for district heating, after condensed water in high temperature heat exchange, successively through second heat net height temperature main water outlet pipe, water knockout drum and heating plant female pipe of intaking picks out, low-temperature condensate in heat exchangers for district heating after heat exchange accesses the female pipe of phase-change heat-exchange drum low temperature water inlet by a heat supply network low temperature main water outlet pipe, finally enter phase-change heat-exchange drum, circulation like this, second heat net high-temperature medium temperature measurer is for monitoring the second heat net height temperature leaving water temperature of heat exchangers for district heating, when leaving water temperature does not meet user's required value, by regulating the aperture of a heat supply network high-temperature inlet water electric control valve, and then regulate the condensed water in high temperature flow entering heat exchangers for district heating, secondary heat supply network leaving water temperature is met the demands, when unit in summer non-heating period runs, cut off the operation of heat exchangers for district heating by turning off a heat supply network high-temperature inlet water shut-off valve and heat supply network low temperature water outlet shut-off valve, the condensate water that association system has heated all returns former low adding system.
9. the integrated processes of phase-change heat-exchanger band heat exchangers for district heating according to claim 8, it is characterized in that: the down-comer medium temperature measurer on down-comer is for monitoring the medium temperature in down-comer, when flue-gas temperature or down-comer medium temperature do not meet setting required value, signal feedback is to terminal control, by regulating phase-change heat-exchange drum low temperature water inlet motorized adjustment valve opening, and then regulate low-temperature condensate to enter the flow of phase-change heat-exchange drum, exhaust gas temperature or down-comer medium temperature are met the demands; Second heat net high-temperature medium temperature measurer is for monitoring the second heat net height temperature leaving water temperature of heat exchangers for district heating, when leaving water temperature does not meet user's required value, signal feedback is to terminal control, by regulating the aperture of a heat supply network high-temperature inlet water electric control valve, and then regulate the condensed water in high temperature flow entering heat exchangers for district heating, secondary heat supply network leaving water temperature is met the demands.
10. the integrated processes of phase-change heat-exchanger band heat exchangers for district heating according to claim 9, it is characterized in that: second heat net high-temperature medium temperature measurer is for monitoring the second heat net height temperature leaving water temperature of heat exchangers for district heating, when leaving water temperature does not meet user's required value, signal feedback is to terminal control, by regulating the aperture of a heat supply network high-temperature inlet water electric control valve, and then regulate the condensed water in high temperature flow entering heat exchangers for district heating, secondary heat supply network leaving water temperature is met the demands, if cannot meet the demands, manually turn down manually-operated gate and regulate further.
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Denomination of invention: A Combined System and Method for Phase Change Heat Exchangers with Heating Network Heaters Effective date of registration: 20230927 Granted publication date: 20170329 Pledgee: Bank of Hangzhou Limited by Share Ltd. science and Technology Branch Pledgor: HANGZHOU HUADIAN ENERGY ENGINEERING Co.,Ltd. Registration number: Y2023980059517 |