CN207813676U - It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit - Google Patents
It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit Download PDFInfo
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- CN207813676U CN207813676U CN201721743409.8U CN201721743409U CN207813676U CN 207813676 U CN207813676 U CN 207813676U CN 201721743409 U CN201721743409 U CN 201721743409U CN 207813676 U CN207813676 U CN 207813676U
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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
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- Y02E20/00—Combustion technologies with mitigation potential
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Abstract
The solidifying back of the body of taking out is improved for thermally safe co-generation unit the utility model discloses a kind of, it includes：No.1 cogeneration units and No. two cogeneration units, No.1 cogeneration units are provided with cooling steam system, heat supply network water supply and return system is connect with the water side of No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers respectively, the steam side that No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers are connected using heating steam branch pipe, the low-temperature circulating water system of No.1 cogeneration units and No. two cogeneration units is connected using periodical feeding branch pipe with circulating backwater branch pipe.The utility model utilizes indirect heat exchange, while effectively reducing cooling steam temperature, ensure that the quality of cooling steam；The initial station for also achieving two thermoelectricity units is connected in parallel, and improves the safety of heat network system operation；Meanwhile when by realizing the operation of No.1 cogeneration units back pressure operating mode, need to only put into operation a water circulating pump, reduce the power consumption of equipment.
Description
Technical field
The utility model belongs to cogeneration of heat and power technical field, and in particular to a kind of solidifying back of the body of taking out of raising is for thermally safe thermoelectricity connection
Production system is particularly suitable for low pressure (LP) cylinder not into the steam power plant of vapour.
Background technology
Currently, China's policy gradually payes attention to the popularization of new energy, the ratio of fired power generating unit is reduced.For thermal power plant,
The steam exhaust of steam turbine is typically to be fallen by air-cooled or water-cooling pattern direct emission, this has resulted in huge cold end loss.
Such as the capacity usage ratio of the subcritical pure condensate units of 300MW is about 38%, wherein cold end loss accounts for about 45%, after extraction for heat supply
The capacity usage ratio of unit is promoted to 60%, but still has 20% condensation low temperature exhaust heat to be discharged, this partial heat is due to product
Position is low and is difficult to directly utilize.Simultaneously as power grid is consumption new energy electric power, the requirement to coal motor group thermoelectricity flexibility is not
Disconnected to reinforce, coal motor group need to realize Ultra-low load operation, could meet the peak regulation demand of power grid, this brings to coal-fired thermal power unit
Great challenge.
Application No. is 201710193938.3 Chinese patents to disclose " steam turbine extraction condensing back pressure system and its adjusting method ",
Nothing needs to change rotor in the system, you can realizes that low pressure (LP) cylinder does not put into operation, which can both increase externally to the greatest extent
Heating load, and can be generated electricity with the realization unit underload of high benefit.And when low pressure (LP) cylinder is not into automotive row, into corresponding condenser
Steam amount it is seldom, at this time water circulating pump belong to ultra-low load operating, not only power consumption is big, but also also has to water circulating pump equipment
There is certain damage；Meanwhile when intermediate pressure cylinder steam discharge all external heat supplies, thermic load sharply increases, corresponding heat supply network is first at this time
Thus standing-meeting can also have some impact on the safety of heating system there are design capacity deficiency.
Utility model content
Based on the above situation, the utility model overcomes above-mentioned deficiency existing in the prior art, it is proposed that a kind of design conjunction
Reason, dependable performance are advantageously implemented the solidifying back of the body of taking out of unit raising and supply thermally safe co-generation unit.
The technical scheme in the invention for solving the above technical problem is：It is a kind of to improve the solidifying back of the body of taking out for thermally safe thermoelectricity
Co-generation system, including cogeneration units, the cogeneration units include No.1 cogeneration units and No. two cogenerations of heat and power
Unit；It is characterized in that：
The No.1 cogeneration units include：No.1 Steam Turbine Through IP Admission, No.1 turbine low pressure cylinder, No.1 condensing
Device, No.1 cooling tower, No.1 water circulating pump, steam cooling device and No.1 heat supply network heat exchanger, the No.1 Steam Turbine Through IP Admission
Steam drain connect with the air intake of No.1 turbine low pressure cylinder by No.1 communicating pipe, and along steam on No.1 communicating pipe
Flow direction is sequentially arranged with No.1 back pressure hydraulic pressure butterfly valve and No.1 takes out and coagulates hydraulic pressure butterfly valve, the steam discharge of the No.1 turbine low pressure cylinder
Mouth is connect with No.1 condenser, and the low-temperature circulating water side of the No.1 condenser passes through No.1 recirculation return pipe and No.1 cycle supplies
Water pipe is connect with No.1 cooling tower, and third regulating valve, No.1 are sequentially arranged in No.1 recirculation return pipe upper edge dampening flow direction
Water circulating pump and the 4th regulating valve, on No.1 periodical feeding pipe be equipped with the second regulating valve, the steam inlet of cooling steam pipe and
Steam (vapor) outlet is connect with the air intake of the steam drain of No.1 Steam Turbine Through IP Admission and No.1 turbine low pressure cylinder respectively, is steamed cooling
Direction is moved along steam stream be sequentially arranged with the first regulating valve, pressure reducing valve, steam cooling device and the first shut-off valve on steam pipe, it is described
The cooling water side of steam cooling device is connected with cooling water inlet pipe and cooling water outlet pipe, the steam of the No.1 heat supply network heat exchanger into
Mouth is connect by No.1 heating extraction steam pipe with the steam drain of No.1 Steam Turbine Through IP Admission, in No.1 heating extraction steam pipe and No.1 heat supply network
The steam inlet of heat exchanger is respectively provided with the 5th regulating valve and the 6th regulating valve, and the hydrophobic outlet of the No.1 heat supply network heat exchanger connects
It is connected to No.1 heat supply network drain pipe；
No. two cogeneration units include：No. two Steam Turbine Through IP Admissions, No. two turbine low pressure cylinders, No. two condensings
Device, No. two cooling towers, No. two water circulating pumps and No. two heat supply network heat exchangers, the steam drain of No. two Steam Turbine Through IP Admissions pass through two
It number is connect with the air intake of No. two turbine low pressure cylinders communicating pipe, and is taken out equipped with No. two on No. two communicating pipes and coagulate hydraulic pressure butterfly valve,
The steam drain of No. two turbine low pressure cylinders is connect with No. two condensers, and the low-temperature circulating water side of No. two condensers passes through
No. two recirculation return pipes and No. two periodical feeding pipes are connect with No. two cooling towers, and water flowing side in No. two recirculation return pipe upper edges
To the 7th regulating valve, No. two water circulating pumps and the 8th regulating valve is sequentially arranged with, the steam inlet of No. two heat supply network heat exchangers is logical
It crosses No. two heating extraction steam pipes to connect with the steam drain of No. two Steam Turbine Through IP Admissions, in No. two heating extraction steam pipes and No. two heat supply network heat exchange
The steam inlet of device is respectively provided with the 9th regulating valve and the tenth regulating valve, and the hydrophobic outlet of No. two heat supply network heat exchangers is connected with
No. two heat supply network drain pipes；
The heat supply network return pipe is connect with the water side-entrance of No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers, the heat supply network
Feed pipe is connect with the water side outlet of No.1 heat supply network heat exchanger and No. two heat supply network heat exchangers, the steam inlet of the 6th regulating valve
It is connect with the steam inlet of the tenth regulating valve by heating steam branch pipe, and is adjusted equipped with the 13rd on heating steam branch pipe
The circulating water outlet of valve, the No.1 condenser is connect by periodical feeding branch pipe with the circulating water outlet of No. two condensers, and
12nd regulating valve is housed on periodical feeding branch pipe, the circulating water intake of the No.1 condenser by circulating backwater branch pipe with
The circulating water outlet connection of No. two water circulating pumps, and the 11st regulating valve is housed on circulating backwater branch pipe.
Preferably, No.1 heat supply network heat exchanger described in the utility model is connected in parallel with No. two heat supply network heat exchangers, and
It is respectively provided with the 16th valve and the 17th valve in the water side-entrance of No.1 heat supply network heat exchanger and water side outlet, in No. two heat supply networks
The water side-entrance of heat exchanger and water side outlet are respectively provided with the 14th valve and the 15th valve.
Preferably, valve of the No.1 back pressure hydraulic pressure butterfly valve described in the utility model for no mechanical position limitation, when valve is complete
Fluid No leakage when pass；It is the valve for having mechanical position limitation that No.1, which takes out solidifying hydraulic pressure butterfly valve and the solidifying hydraulic pressure butterfly valve of No. two pumpings, when valve is complete
Fluid is still negotiable when pass.
Preferably, steam cooling device described in the utility model be dividing wall type heat exchanger, steam cooling device it is cold
But water source can come from condensed water, low-temperature circulating water and the boiler replenishing water of cogeneration units, can be from the softening of power plant
Water, demineralized water or tap water.
Preferably, the first regulating valve described in the utility model, the second regulating valve, third regulating valve, the 4th regulating valve,
5th regulating valve, the 6th regulating valve, the 7th regulating valve, the 8th regulating valve, the 9th regulating valve, the tenth regulating valve, the 11st are adjusted
Valve, the 12nd regulating valve, the 13rd regulating valve, the 14th regulating valve, the 15th regulating valve, the 16th regulating valve and the 17th are adjusted
Section valve all has the function of cut-off and adjusting.
A kind of adjusting method as described above for improving the solidifying pumping back of the body and supplying thermally safe co-generation unit, which is characterized in that
Adjusting method is as follows：
When No.1 cogeneration units and No. two cogeneration units are supplying thermal condition：
In No. two cogeneration units, opens and adjust No. two and take out and coagulate hydraulic pressure butterfly valve, the 9th regulating valve and the tenth adjusting
A part of steam discharge of valve, No. two Steam Turbine Through IP Admissions continues to do work into No. two turbine low pressure cylinders, No. two Steam Turbine Through IP Admissions
Another part steam discharge enter No. two heat supply network heat exchangers and heat the hot net waters from heat supply network return pipe；It is adjusted at this point, opening the 7th
Valve and the 8th regulating valve, using No. two water circulating pumps by No. two recirculation return pipes by the low-temperature circulating water from No. two cooling towers
No. two condensers are delivered to, the low-temperature circulating water after being heated is delivered to No. two cooling towers by No. two periodical feeding pipes again；
In No.1 cogeneration units, closes the first regulating valve and the first shut-off valve, cooling steam pipe is in off state,
Cooling steam system does not put into operation；At this point, standard-sized sheet No.1 back pressure hydraulic pressure butterfly valve, open and adjust No.1 take out coagulate hydraulic pressure butterfly valve,
5th regulating valve and the 6th regulating valve, a part of steam discharge of No.1 Steam Turbine Through IP Admission, which enters No.1 turbine low pressure cylinder, to be continued to do
Another part steam discharge of work(, No.1 Steam Turbine Through IP Admission enters heat supply network of the No.1 heat supply network heat exchanger heating from heat supply network return pipe
Water；At this point, opening the second regulating valve, third regulating valve and the 4th regulating valve, it is recycled back to by No.1 using No.1 water circulating pump
Low-temperature circulating water from No.1 cooling tower is delivered to No.1 condenser by water pipe, and the low-temperature circulating water after being heated is again by one
Number periodical feeding pipe is delivered to No.1 cooling tower；
The 14th regulating valve and the 16th regulating valve are opened and adjust, the hot net water from heat supply network return pipe enters one simultaneously
Number heat supply network heat exchanger and No. two heat supply network heat exchangers, open and adjust the 15th regulating valve and the 17th regulating valve, after heating
After hot net water output mixing, by the external heat supply of heat supply network feed pipe.
When No.1 cogeneration units are back pressure operating mode, No. two cogeneration units are supplying thermal condition, under back pressure operating mode
No.1 turbine low pressure cylinder not into vapour do work：
In No. two cogeneration units, opens and adjust No. two and take out and coagulate hydraulic pressure butterfly valve, the 9th regulating valve and the tenth adjusting
A part of steam discharge of valve, No. two Steam Turbine Through IP Admissions continues to do work into No. two turbine low pressure cylinders, No. two Steam Turbine Through IP Admissions
Another part steam discharge enter No. two heat supply network heat exchangers and heat the hot net waters from heat supply network return pipe；At this point, opening and adjusting
Seven regulating valves and the 8th regulating valve, using No. two water circulating pumps by No. two recirculation return pipes by the low temperature from No. two cooling towers
Recirculated water is delivered to No. two condensers, and the low-temperature circulating water after being heated is delivered to No. two coolings by No. two periodical feeding pipes again
Tower；
In No.1 cogeneration units, the first regulating valve and the first shut-off valve are opened, cooling steam pipe is open state,
Cooling steam system puts into operation；At this point, contract fully No.1 back pressure hydraulic pressure butterfly valve and No.1 take out and coagulate hydraulic pressure butterfly valve, opens the 5th and adjust
Valve and the 6th regulating valve are saved, the steam discharge of No.1 Steam Turbine Through IP Admission fully enters the heating of No.1 heat supply network heat exchanger and comes from heat supply network return water
The hot net water of pipe；At this point, having the No.1 Steam Turbine Through IP Admission steam discharge of one very little flow to first pass around pressure reducing valve reduces pressure,
It is secondary to reduce temperature by steam cooling device, it is cooled down subsequently into No.1 turbine low pressure cylinder；At this point, closing second
Regulating valve, third regulating valve and the 4th regulating valve, No.1 water circulating pump and No.1 cooling tower do not put into operation；At this point, opening the
11 regulating valves and the 12nd regulating valve, the part low-temperature circulating water from No. two cooling towers are also conveyed by circulating backwater branch pipe
To No.1 condenser, the low-temperature circulating water after being heated is delivered to No. two cooling towers by periodical feeding branch pipe again.
The 14th regulating valve and the 16th regulating valve are opened and adjust, the hot net water from heat supply network return pipe enters one simultaneously
Number heat supply network heat exchanger and No. two heat supply network heat exchangers, open and adjust the 15th regulating valve and the 17th regulating valve, after heating
After hot net water output mixing, by the external heat supply of heat supply network feed pipe.
Preferably, when No.1 cogeneration units and No. two cogeneration units are supplying thermal condition：
Close the 11st regulating valve and the 12nd regulating valve, the circulation of No.1 cogeneration units and No. two thermoelectricity
The circulation of coproduction unit is not connected to mutually, each self-sustaining independent operating；
The 13rd regulating valve is closed, the heating steam of No.1 heat supply network heat exchanger and the heating steam of No. two heat supply network heat exchangers are mutual
It is not connected to, each self-sustaining independent operating.
When No.1 cogeneration units are back pressure operating mode, No. two cogeneration units are supplying thermal condition：
Open the 11st regulating valve and the 12nd regulating valve, No.1 cooling tower and the No.1 cycle of No.1 cogeneration units
Water pump does not put into operation, is joined simultaneously for No.1 cogeneration units and No. two thermoelectricity using No. two cooling towers and No. two water circulating pumps
It produces unit and low-temperature circulating water is provided, by adjusting the aperture of the 8th regulating valve and the 11st regulating valve, adjust enter No. two respectively
The low-temperature circulating water of condenser and No.1 condenser；
At this point, the steam discharge of No.1 Steam Turbine Through IP Admission, all for external heat supply, it is negative that No.1 heat supply network heat exchanger will appear heat
Lotus is excessive and causes to reduce for thermal safety, the 13rd regulating valve can be opened and adjust, by the part of No.1 Steam Turbine Through IP Admission
Steam discharge is delivered to No. two heat supply network heat exchangers by heating steam branch pipe, using No. two heat supply network heat exchanger surplus capacities, dissolves No.1
The excessive thermic load of heat supply network heat exchanger.
Compared with prior art, the utility model has the advantages that：（1）The utility model design is closed
Reason, simple in structure, dependable performance realize that the initial station of two thermoelectricity units is connected in parallel by heating steam branch pipe, pass through cycle
Return branch and periodical feeding branch pipe link together the circulation of two thermoelectricity units；（2）The utility model can be with
When realizing the operation of No.1 cogeneration units back pressure operating mode, No.1 water circulating pump can be expired without putting into operation using No. two cooling towers
The low-temperature receiver demand of sufficient condenser, institute's increased energy consumption when eliminating No.1 water circulating pump low load operation；（3）The utility model is logical
It crosses and two initial stations links together so that the two can mutually undertake respectively extra heating demand, improve heat network system fortune
Capable safety.
Description of the drawings
Fig. 1 is that the solidifying structural schematic diagram for taking out the back of the body for thermally safe co-generation unit is improved in the utility model embodiment.
Specific implementation mode
The utility model is described in further detail below in conjunction with the accompanying drawings and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
In the present embodiment, referring to Fig. 1, a kind of solidifying back of the body of taking out of raising supplies thermally safe co-generation unit, including thermoelectricity connection
Unit is produced, the cogeneration units include No.1 cogeneration units 1 and No. two cogeneration units 2.
The No.1 cogeneration units 1 include：No.1 Steam Turbine Through IP Admission 101, No.1 turbine low pressure cylinder 102, one
Number condenser 103, No.1 cooling tower 104, No.1 water circulating pump 105, steam cooling device 106 and No.1 heat supply network heat exchanger 107,
The air intake that the steam drain of the No.1 Steam Turbine Through IP Admission 101 passes through No.1 communicating pipe 110 and No.1 turbine low pressure cylinder 102
Connection, on the No.1 communicating pipe 110 along steam stream move direction be sequentially arranged with No.1 back pressure hydraulic pressure butterfly valve 121 and No.1 take out it is solidifying
The steam drain of hydraulic pressure butterfly valve 122, the No.1 turbine low pressure cylinder 102 is connect with No.1 condenser 103, the No.1 condenser
103 low-temperature circulating water side is connect by No.1 recirculation return pipe 114 and No.1 periodical feeding pipe 113 with No.1 cooling tower 104,
114 upper edge dampening flow direction of the No.1 recirculation return pipe is sequentially arranged with third regulating valve 127,105 and of No.1 water circulating pump
4th regulating valve 128, is equipped with the second regulating valve 126 on the No.1 periodical feeding pipe 113, the steam of cooling steam pipe 111 into
Mouth and steam (vapor) outlet connect with the air intake of the steam drain of No.1 Steam Turbine Through IP Admission 101 and No.1 turbine low pressure cylinder 102 respectively
It connects, along steam stream moving direction on the cooling steam pipe 111, to be sequentially arranged with the first regulating valve 123, pressure reducing valve 124, steam cold
But device 106 and the first shut-off valve 125, the cooling water side of the steam cooling device 106 are connected with cooling water inlet pipe 115 and cold
But the steam inlet of outlet pipe 116, the No.1 heat supply network heat exchanger 107 passes through No.1 heating extraction steam pipe 112 and No.1 steam turbine
The steam drain of intermediate pressure cylinder 101 connects, the steaming of the steam inlet and No.1 heat supply network heat exchanger 107 of the No.1 heating extraction steam pipe 112
Vapor inlet is respectively provided with the 5th regulating valve 129 and the 6th regulating valve 130, and the hydrophobic outlet of the No.1 heat supply network heat exchanger 107 connects
It is connected to No.1 heat supply network drain pipe 117.
No. two cogeneration units 2 include：201, No. two turbine low pressure cylinders 202, two of No. two Steam Turbine Through IP Admissions
Number water circulating pump 205 of cooling tower 204, two of condenser 203, two and No. two heat supply network heat exchangers 206, in No. two steam turbines
The steam drain of cylinder pressure 201 is connect by No. two communicating pipes 210 with the air intake of No. two turbine low pressure cylinders 202, No. two companies
It is taken out equipped with No. two on siphunculus 210 and coagulates hydraulic pressure butterfly valve 221, the steam drain and No. two condensers of No. two turbine low pressure cylinders 202
203 connections, the low-temperature circulating water side of No. two condensers 203 passes through No. two recirculation return pipes 213 and No. two periodical feeding pipes
212 connect with No. two cooling towers 204, and 213 upper edge dampening flow direction of No. two recirculation return pipes is sequentially arranged with the 7th adjusting
222, No. two water circulating pumps 205 of valve and the 8th regulating valve 223, the steam inlet of No. two heat supply network heat exchangers 206 pass through No. two
Heating extraction steam pipe 211 is connect with the steam drain of No. two Steam Turbine Through IP Admissions 201, No. two heating extraction steam pipes 211 and No. two heat
The steam inlet of net heat exchanger 206 is respectively provided with the 9th regulating valve 224 and the tenth regulating valve 225, No. two heat supply network heat exchangers
206 hydrophobic outlet is connected with No. two heat supply network drain pipes 214.
Heat supply network return pipe 61 is connect with the water side-entrance of No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, heat supply network
Feed pipe 62 is connect with the water side outlet of No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, the 6th regulating valve
130 steam inlet is connect by heating steam branch pipe 5 with the steam inlet of the tenth regulating valve 225, the heating steam branch pipe 5
Upper that 13rd regulating valve 51 is housed, the circulating water outlet of the No.1 condenser 103 passes through periodical feeding branch pipe 4 and No. two condensings
The circulating water outlet of device 203 connects, and the 12nd regulating valve 41, the No.1 condenser 103 are housed on the periodical feeding branch pipe 4
Circulating water intake connect with the circulating water outlet of No. two water circulating pumps 205 by circulating backwater branch pipe 3, the circulating backwater branch
11st regulating valve 31 is housed on pipe 3.
In the present embodiment, first regulating valve 123, the second regulating valve 126, third regulating valve 127, the 4th regulating valve
128, the 5th regulating valve 129, the 6th regulating valve 130, the 7th regulating valve 222, the 8th regulating valve 223, the 9th regulating valve 224,
Ten regulating valves 225, the 11st regulating valve 31, the 12nd regulating valve 41, the 13rd regulating valve 51, the 14th regulating valve the 63, the tenth
Five regulating valves 64, the 16th regulating valve 65 and the 17th regulating valve 66 all have cut-off and regulatory function.
In the present embodiment, the No.1 back pressure hydraulic pressure butterfly valve 121 is the valve of no mechanical position limitation, is flowed when valve is fully closed
Body No leakage, that is, when No.1 back pressure hydraulic pressure butterfly valve 121 is fully closed, the steam discharge of No.1 Steam Turbine Through IP Admission 101 can not pass through one
Number communicating pipe 110 enters No.1 turbine low pressure cylinder 102；No.1 takes out solidifying hydraulic pressure butterfly valve 122 and No. two are taken out solidifying hydraulic pressure butterfly valve 221
To there is the valve of mechanical position limitation, when valve is fully closed, fluid is still negotiable, that is, No. two take out coagulate hydraulic pressure butterfly valve 221 it is fully closed when,
The steam discharge of also a small amount of No. two Steam Turbine Through IP Admissions 201 can enter No. two turbine low pressure cylinders 202 by No. two communicating pipes 210.
In the present embodiment, steam cooling device 106 is dividing wall type heat exchanger, by way of indirect heat exchange, to cooling
Steam cools down, and the cooling water source of wherein steam cooling device 106 can come from the condensed water of cogeneration units, low temperature follows
Ring water or boiler replenishing water can also be softened water, demineralized water or tap water from power plant.
In the present embodiment, specific adjusting method is as follows：
When No.1 cogeneration units 1 and No. two cogeneration units 2 are supplying thermal condition：
In No. two cogeneration units 2, opens and adjust No. two and take out and coagulate hydraulic pressure butterfly valve 221, the 9th regulating valve 224 and the
A part of steam discharge of ten regulating valves 225, No. two Steam Turbine Through IP Admissions 201 continues to do into No. two turbine low pressure cylinders 202
Work(, another part steam discharge of No. two Steam Turbine Through IP Admissions 201 enter No. two heating of heat supply network heat exchanger 206 and come from heat supply network return water
The hot net water of pipe 61；At this point, the 7th regulating valve 222 and the 8th regulating valve 223 are opened, it is logical using No. two water circulating pumps 205
It crosses No. two recirculation return pipes 213 and the low-temperature circulating water from No. two cooling towers 204 is delivered to No. two condensers 203, heated
Low-temperature circulating water afterwards is delivered to No. two cooling towers 204 by No. two periodical feeding pipes 212 again；
In No.1 cogeneration units 1, the first regulating valve 123 and the first shut-off valve 125, cooling steam pipe 111 are closed
It is in off state, cooling steam system does not put into operation；At this point, standard-sized sheet No.1 back pressure hydraulic pressure butterfly valve 121, opens and adjusts No.1
It takes out and coagulates hydraulic pressure butterfly valve 122, the 5th regulating valve 129 and the 6th regulating valve 130, a part for the No.1 Steam Turbine Through IP Admission 101
Steam discharge, which enters No.1 turbine low pressure cylinder 102, to be continued to do work, and another part steam discharge of the No.1 Steam Turbine Through IP Admission 101 enters
No.1 heat supply network heat exchanger 107 heats the hot net water from heat supply network return pipe 61；At this point, opening the second regulating valve 126, third is adjusted
Valve 127 and the 4th regulating valve 128 will come from No.1 cooling tower using No.1 water circulating pump 105 by No.1 recirculation return pipe 114
104 low-temperature circulating water is delivered to No.1 condenser 103, and the low-temperature circulating water after being heated passes through No.1 periodical feeding pipe again
113 are delivered to No.1 cooling tower 104；
The 14th regulating valve 63 and the 16th regulating valve 65 are opened and adjust, the hot net water from heat supply network return pipe 61 is simultaneously
Into No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, opens and adjust the adjusting of the 15th regulating valve 64 and the 17th
Valve 66, after the hot net water output mixing after being heated, by the 62 external heat supply of heat supply network feed pipe.
When No.1 cogeneration units 1 are back pressure operating mode, No. two cogeneration units 2 are supplying thermal condition：
In No. two cogeneration units 2, opens and adjust No. two and take out and coagulate hydraulic pressure butterfly valve 221, the 9th regulating valve 224 and the
A part of steam discharge of ten regulating valves 225, No. two Steam Turbine Through IP Admissions 201 continues to do into No. two turbine low pressure cylinders 202
Work(, another part steam discharge of No. two Steam Turbine Through IP Admissions 201 enter No. two heating of heat supply network heat exchanger 206 and come from heat supply network return water
The hot net water of pipe 61；At this point, opening and adjusting the 7th regulating valve 222 and the 8th regulating valve 223, No. two water circulating pumps 205 are utilized
The low-temperature circulating water from No. two cooling towers 204 is delivered to No. two condensers 203 by No. two recirculation return pipes 213, is added
Low-temperature circulating water after heat is delivered to No. two cooling towers 204 by No. two periodical feeding pipes 212 again；
In No.1 cogeneration units 1, the first regulating valve 123 and the first shut-off valve 125, cooling steam pipe 111 are opened
For open state, cooling steam system puts into operation；At this point, contract fully No.1 back pressure hydraulic pressure butterfly valve 121 and No.1 take out lime set pressure
Butterfly valve 122, opens the 5th regulating valve 129 and the 6th regulating valve 130, the steam discharge of No.1 Steam Turbine Through IP Admission 101 fully enter one
Number heat supply network heat exchanger 107 heats the hot net water from heat supply network return pipe 61；At this point, being pressed in having the No.1 steam turbine of one small flow
The steam discharge of cylinder 101, which first passes around pressure reducing valve 124, reduces pressure, secondly reduces temperature by steam cooling device 106, subsequently into
No.1 turbine low pressure cylinder 102 is cooled down；At this point, closing the second regulating valve 126, third regulating valve 127 and the 4th regulating valve
128, No.1 water circulating pump 105 and No.1 cooling tower 104 do not put into operation；At this point, opening the 11st regulating valve 31 and the 12nd
Regulating valve 41, the part low-temperature circulating water from No. two cooling towers 204 are delivered to No.1 condenser by circulating backwater branch pipe 3
103, the low-temperature circulating water after being heated is delivered to No. two cooling towers 204 by periodical feeding branch pipe 4 again；
The 14th regulating valve 63 and the 16th regulating valve 65 are opened and adjust, the hot net water from heat supply network return pipe 61 is simultaneously
Into No.1 heat supply network heat exchanger 107 and No. two heat supply network heat exchangers 206, opens and adjust the adjusting of the 15th regulating valve 64 and the 17th
Valve 66, after the hot net water output mixing after being heated, by the 62 external heat supply of heat supply network feed pipe.
For the adjusting method in the present embodiment, following purpose can also be realized：
When No.1 cogeneration units 1 and No. two cogeneration units 2 are supplying thermal condition：
Close the 11st regulating valve 31 and the 12nd regulating valve 41, the circulation of No.1 cogeneration units 1 and two
The circulation of number cogeneration units 2 is not connected to mutually, each self-sustaining independent operating；
Close the 13rd regulating valve 51, the heating steam of No.1 heat supply network heat exchanger 107 is adopted with No. two heat supply network heat exchangers 206
Warm steam is not connected to mutually, each self-sustaining independent operating.
When No.1 cogeneration units 1 are back pressure operating mode, No. two cogeneration units 2 are supplying thermal condition：
Open the 11st regulating valve 31 and the 12nd regulating valve 41,104 He of No.1 cooling tower of No.1 cogeneration units 1
No.1 water circulating pump 105 does not put into operation, is joined simultaneously for No.1 thermoelectricity using No. two cooling towers 204 and No. two water circulating pumps 205
It produces unit 1 and No. two cogeneration units 2 provides low-temperature circulating water, by adjusting the 8th regulating valve 223 and the 11st regulating valve
31 aperture adjusts the low-temperature circulating water into No. two condensers 203 and No.1 condenser 103 respectively；
At this point, the steam discharge of No.1 Steam Turbine Through IP Admission 101 is all for external heat supply, No.1 heat supply network heat exchanger 107 can go out
It is reduced for thermal safety caused by existing thermic load is excessive, can open and adjust the 13rd regulating valve 51, it will be in No.1 steam turbine
The part steam discharge of cylinder pressure 101 is delivered to No. two heat supply network heat exchangers 206 by heating steam branch pipe 5, utilizes No. two heat supply network heat exchangers
206 surplus capacities, the excessive thermic load of consumption No.1 heat supply network heat exchanger 107.
Furthermore, it is necessary to illustrate, the specific embodiment described in this specification, the shape of parts and components is named
Claiming etc. can be different, described in this specification above content is only to the utility model structure example explanation.
The equivalence changes or simple change that all structure, feature and principles according to described in the utility model patent concept are done, are wrapped
It includes in the protection domain of the utility model patent.Those skilled in the art of the present invention can be to described
Specific embodiment does various modifications or additions or substitutes by a similar method, without departing from the knot of the utility model
Structure or beyond the scope defined by this claim, all should belong to the protection range of the utility model.
Claims (4)
1. a kind of improving the solidifying back of the body of taking out for thermally safe co-generation unit, including cogeneration units, the cogeneration units
Including No.1 cogeneration units（1）With No. two cogeneration units（2）；It is characterized in that：
The No.1 cogeneration units（1）Including：No.1 Steam Turbine Through IP Admission（101）, No.1 turbine low pressure cylinder（102）、
No.1 condenser（103）, No.1 cooling tower（104）, No.1 water circulating pump（105）, steam cooling device（106）With No.1 heat supply network
Heat exchanger（107）, the No.1 Steam Turbine Through IP Admission（101）Steam drain pass through No.1 communicating pipe（110）With No.1 steam turbine
Low pressure (LP) cylinder（102）Air intake connection, the No.1 communicating pipe（110）On move direction along steam stream and be sequentially arranged with No.1 back pressure
Hydraulic pressure butterfly valve（121）It is taken out with No.1 and coagulates hydraulic pressure butterfly valve（122）, the No.1 turbine low pressure cylinder（102）Steam drain and No.1
Condenser（103）Connection, the No.1 condenser（103）Low-temperature circulating water side pass through No.1 recirculation return pipe（114）With one
Number periodical feeding pipe（113）With No.1 cooling tower（104）Connection, the No.1 recirculation return pipe（114）Upper edge water flowing side
To being sequentially arranged with third regulating valve（127）, No.1 water circulating pump（105）With the 4th regulating valve（128）, the No.1 periodical feeding
Pipe（113）It is upper that second regulating valve is housed（126）, cooling steam pipe（111）Steam inlet and steam (vapor) outlet respectively with No.1 vapour
Turbine intermediate pressure cylinder（101）Steam drain and No.1 turbine low pressure cylinder（102）Air intake connection, the cooling steam pipe
（111）On move direction along steam stream and be sequentially arranged with the first regulating valve（123）, pressure reducing valve（124）, steam cooling device（106）
With the first shut-off valve（125）, the steam cooling device（106）Cooling water side be connected with cooling water inlet pipe（115）And cooling
Outlet pipe（116）, the No.1 heat supply network heat exchanger（107）Steam inlet pass through No.1 heating extraction steam pipe（112）With No.1 vapour
Turbine intermediate pressure cylinder（101）Steam drain connection, the No.1 heating extraction steam pipe（112）Steam inlet and No.1 heat supply network heat exchanger
（107）Steam inlet be respectively provided with the 5th regulating valve（129）With the 6th regulating valve（130）, the No.1 heat supply network heat exchanger
（107）Hydrophobic outlet be connected with No.1 heat supply network drain pipe（117）；
No. two cogeneration units（2）Including：No. two Steam Turbine Through IP Admissions（201）, No. two turbine low pressure cylinders（202）、
No. two condensers（203）, No. two cooling towers（204）, No. two water circulating pumps（205）With No. two heat supply network heat exchangers（206）, described two
Number Steam Turbine Through IP Admission（201）Steam drain pass through No. two communicating pipes（210）With No. two turbine low pressure cylinders（202）Air intake
Connection, No. two communicating pipes（210）Upper taken out equipped with No. two coagulates hydraulic pressure butterfly valve（221）, No. two turbine low pressure cylinders（202）
Steam drain and No. two condensers（203）Connection, No. two condensers（203）Low-temperature circulating water side be recycled back to by No. two
Water pipe（213）With No. two periodical feeding pipes（212）With No. two cooling towers（204）Connection, No. two recirculation return pipes（213）On
It is sequentially arranged with the 7th regulating valve along water flowing direction（222）, No. two water circulating pumps（205）With the 8th regulating valve（223）, described
No. two heat supply network heat exchangers（206）Steam inlet pass through No. two heating extraction steam pipes（211）With No. two Steam Turbine Through IP Admissions（201）'s
Steam drain connects, No. two heating extraction steam pipes（211）With No. two heat supply network heat exchangers（206）Steam inlet be respectively provided with the 9th
Regulating valve（224）With the tenth regulating valve（225）, No. two heat supply network heat exchangers（206）Hydrophobic outlet be connected with No. two heat supply networks
Drain pipe（214）；
Heat supply network return pipe（61）With No.1 heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）Water side-entrance connection, heat
Net feed pipe（62）With No.1 heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）Water side outlet connection, the described 6th
Regulating valve（130）Steam inlet pass through heating steam branch pipe（5）With the tenth regulating valve（225）Steam inlet connection, it is described
Heating steam branch pipe（5）It is upper that 13rd regulating valve is housed（51）, the No.1 condenser（103）Circulating water outlet pass through cycle
Water supply branch pipe（4）With No. two condensers（203）Circulating water outlet connection, the periodical feeding branch pipe（4）It is upper to be equipped with the 12nd
Regulating valve（41）, the No.1 condenser（103）Circulating water intake pass through circulating backwater branch pipe（3）With No. two water circulating pumps
（205）Circulating water outlet connection, the circulating backwater branch pipe（3）It is upper that 11st regulating valve is housed（31）.
2. according to claim 1 improve the solidifying back of the body of taking out for thermally safe co-generation unit, it is characterised in that：The No.1
Heat supply network heat exchanger（107）With No. two heat supply network heat exchangers（206）To be connected in parallel, the No.1 heat supply network heat exchanger（107）Water side
Import and water side outlet are respectively provided with the 16th valve（65）With the 17th valve（66）, No. two heat supply network heat exchangers（206）
Water side-entrance and water side outlet be respectively provided with the 14th valve（63）With the 15th valve（64）.
3. according to claim 1 improve the solidifying back of the body of taking out for thermally safe co-generation unit, it is characterised in that：The No.1
Back pressure hydraulic pressure butterfly valve（121）For the valve of no mechanical position limitation；The No.1, which is taken out, coagulates hydraulic pressure butterfly valve（122）Lime set, which is taken out, with No. two presses butterfly
Valve（221）To there is the valve of mechanical position limitation.
4. according to claim 1 improve the solidifying back of the body of taking out for thermally safe co-generation unit, it is characterised in that：The steam
Cooling device（106）For dividing wall type heat exchanger.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005741A (en) * | 2017-12-14 | 2018-05-08 | 华电电力科学研究院 | It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit and adjusting method |
| CN109356677A (en) * | 2018-10-17 | 2019-02-19 | 华电电力科学研究院有限公司 | A kind of novel solidifying pumping back heating system and operation method for more low pressure (LP) cylinder steam turbines |
| CN109441570A (en) * | 2018-11-05 | 2019-03-08 | 华电电力科学研究院有限公司 | One kind is coagulated in combination for two units takes out back heating system and operation method |
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2017
- 2017-12-14 CN CN201721743409.8U patent/CN207813676U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108005741A (en) * | 2017-12-14 | 2018-05-08 | 华电电力科学研究院 | It is a kind of to improve the solidifying back of the body of taking out for thermally safe co-generation unit and adjusting method |
| CN108005741B (en) * | 2017-12-14 | 2023-07-04 | 华电电力科学研究院有限公司 | Cogeneration system for improving heat supply safety of back condensation and back extraction and adjustment method |
| CN109356677A (en) * | 2018-10-17 | 2019-02-19 | 华电电力科学研究院有限公司 | A kind of novel solidifying pumping back heating system and operation method for more low pressure (LP) cylinder steam turbines |
| CN109356677B (en) * | 2018-10-17 | 2023-09-19 | 华电电力科学研究院有限公司 | Novel condensing back-pumping heat supply system for multi-low pressure cylinder steam turbine and operation method |
| CN109441570A (en) * | 2018-11-05 | 2019-03-08 | 华电电力科学研究院有限公司 | One kind is coagulated in combination for two units takes out back heating system and operation method |
| CN109441570B (en) * | 2018-11-05 | 2023-09-05 | 华电电力科学研究院有限公司 | Condensation back-pumping heat supply system for combination of two units and operation method |
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