CN209688957U - The high back pressure heating system of thermoelectricity decoupling - Google Patents
The high back pressure heating system of thermoelectricity decoupling Download PDFInfo
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- CN209688957U CN209688957U CN201821984012.2U CN201821984012U CN209688957U CN 209688957 U CN209688957 U CN 209688957U CN 201821984012 U CN201821984012 U CN 201821984012U CN 209688957 U CN209688957 U CN 209688957U
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Abstract
The utility model relates to cogeneration of heat and power technical fields, disclose a kind of high back pressure heating system of thermoelectricity decoupling, comprising: low pressure (LP) cylinder, intermediate pressure cylinder, condenser and heat exchangers for district heating；The admission end of low pressure (LP) cylinder is connected to by main steam header road with the first exhaust steam end of intermediate pressure cylinder；Second exhaust steam end of intermediate pressure cylinder is connected to by middle pressure vapor pipeline with the admission end of heat exchangers for district heating, low pressure (LP) cylinder is connected to by low pressure exhaust line with the admission end of condenser, and the backwater outlet end of condenser is connected to by pumps for hot water supply net with the return water entrance of heat exchangers for district heating；Wherein, main steam header road and it is connected to the first bypass line, the first bypass line is equipped with the first inlet valve, and middle pressure vapor pipeline is equipped with the second inlet valve.The utility model is effectively matched with unit exhaust steam residual heat by increasing the high back pressure heating system and cold end design that cooperation excision low pressure (LP) cylinder is run, the cooling caloric receptivity of realization newly, improves the operational flexibility of high back pressure heating system, realize that thermoelectricity decouples operation.
Description
Technical field
The utility model relates to cogeneration of heat and power technical field, in particular to a kind of high back pressure heating system of thermoelectricity decoupling.
Background technique
Fired power generating unit generallys use high back pressure heat supply process (also known as low level energy heat supply process), can effective recycling machine for one
The heating energy-saving technology of group exhaust steam residual heat heating, Heating Period directly recycle unit using heat supply network recirculated water return water as steam discharge cooling water
Exhaust steam residual heat, heat supply network recirculated water return water are then sent through next stage heat exchangers for district heating, by machine after unit exhaust steam residual heat heats substantially
Group steam extraction is externally confessed after carrying out spike heating.
It is partially arranged from low pressure (LP) cylinder from Steam Turbine Through IP Admission steam extraction high back pressure heating system heat supply heat part
Vapour.With intermediate pressure cylinder extraction for heat supply, this some vapor need to do work in high, intermediate pressure cylinder, with low pressure (LP) cylinder steam discharge heat supply, this some vapor
It need to do work in high, medium and low cylinder pressure, in order to realize the heat supply of certain load, it is necessary to issue a certain amount of electric load, otherwise be hair
A certain amount of electric load out needs to receive corresponding thermic load, the associated i.e. coupled thermomechanics of thermoelectricity load.
For Direct Air-cooled Unit, heating period, can be with by adjusting the steam amount for entering Air-Cooling Island and heat supply network condenser
Realize that the thermoelectricity in the case of the high electric load low heat loads of unit decouples operation.But for wet type cooling unit and cold group, heating
When phase unit high back pressure is run, the low pressure (LP) cylinder displacement of unit can only follow heat supply network recirculated water caloric receptivity i.e. heating heat in condenser
Workload demand variation, conventional high back pressure heat supply process can only use the method for operation of electricity determining by heat.On the other hand occur within nearly 2 years
The heating system (cutting cylinder technology) for cutting off low pressure (LP) cylinder into vapour improves machine by realizing that steam turbine cuts off low pressure (LP) cylinder into automotive row
Group takes out hot pump gas ablity, is that the another of high back pressure heat supply extends.But there is no reduce heat supply steam extraction parameter, energy-saving effect compared with
It is small.The thermoelectricity decoupling in the case of low electric load high heat load is addressed only simultaneously, instead for high electric load low heat loads situation
As restriction.
It is existing in current electric grid company under the increasing actual environment of fired power generating unit peaking operation requirement on flexibility
High back pressure heat supply process can not be accomplished to take into account comprehensive thermoelectricity decoupling of economy.
Utility model content
(1) technical problems to be solved
The utility model provides a kind of high back pressure heating system of thermoelectricity decoupling, by traditional high back pressure heating system
On, it increases the heating system of cooperation excision low pressure (LP) cylinder operation newly, and carry out innovation transformation in cold end, realizes cooling by rationally controlling
Caloric receptivity is effectively matched with unit exhaust steam residual heat, improves the operational flexibility of high back pressure heating system, realizes thermoelectricity decoupling
Operation.Under the premise of the system significantly improves unit heat capacity, running a wide range of thermoelectricity load variations are flexibly handled.
(2) technical solution
To solve the above problems, the utility model provides a kind of high back pressure heating system of thermoelectricity decoupling, comprising: low pressure
Cylinder, intermediate pressure cylinder, condenser and heat exchangers for district heating；The admission end of the low pressure (LP) cylinder pass through main steam header road and medium pressure cylinder the
The connection of one exhaust steam end；Second exhaust steam end of medium pressure cylinder is connected by the admission end of middle pressure vapor pipeline and the heat exchangers for district heating
Logical, the low pressure (LP) cylinder is connected to by low pressure exhaust line with the admission end of the condenser, and the backwater outlet of the condenser is logical
Pumps for hot water supply net is crossed to be connected to the return water entrance of the heat exchangers for district heating；Wherein, it main steam header road and is connected to by the of first
Siphunculus road, first bypass line are equipped with the first inlet valve, and medium pressure exhaust line is equipped with the second inlet valve.
Further, the backwater outlet of the heat exchangers for district heating is connected by the return water entrance of heating plant and the condenser
It is logical；The second bypass line is equipped between the return water entrance of the heat exchangers for district heating and the return water entrance of the heating plant, it is described
Second bypass line is equipped with the first inlet valve；At the return water of the backwater outlet of the condenser and the heating plant between mouth
Equipped with third bypass line, the third bypass line is equipped with the second inlet valve.
Further, the main steam header road is equipped with third inlet valve, and the third inlet valve is for regulating and controlling in described
Cylinder pressure enters the quantity of steam of the low pressure (LP) cylinder.
Further, it is equipped with by the of the 4th between the first exhaust steam end of medium pressure cylinder and the admission end of the heat exchangers for district heating
Siphunculus road, the 4th bypass line are equipped with the 4th inlet valve.
Further, first inlet valve, second inlet valve, the third inlet valve and the 4th inlet valve
It is butterfly valve.
Further, first inlet valve is coolant valve group.
Further, further includes: high pressure cylinder and generator；The rotor in rotor and medium pressure cylinder in the high pressure cylinder
It is connected by first shaft coupling；Rotor in medium pressure cylinder is connect with the rotor in the low pressure (LP) cylinder by second shaft coupling；
Rotor in the low pressure (LP) cylinder is connect by third shaft coupling with the rotor of the generator.
Further, further includes: cooling device；The cooling device passes through cooling water inlet pipeline and the condenser
Cooling water inlet connection, the cooling device are connected to by cooling water outlet pipeline with the cooling water outlet of the condenser.
Further, the cooling device be Direct Air-cooled Unit heat supply network condenser and air cooling system combination, indirectly
The subregion condenser of air cooling unit or wet type cooling unit, two sides can through-flow heat supply network recirculated water and cooling circulating waters.
Further, further includes: regenerative apparatus；The condensation-water drain of the condenser passes through water circulating pump and regenerative apparatus
Connection, to cooperate the regenerative apparatus that condensed water is delivered to boiler.
(3) beneficial effect
The utility model provides a kind of high back pressure heating system of thermoelectricity decoupling, passes through newly-increased cooperation excision low pressure (LP) cylinder operation
High back pressure heating system, connection low pressure (LP) cylinder and intermediate pressure cylinder main steam header road on the first bypass line is set, in intermediate pressure cylinder
The second exhaust steam end be connected to by middle pressure vapor pipeline with the admission end of heat exchangers for district heating, and is arranged on the first bypass line
One inlet valve, the second inlet valve being arranged in cooperation on pressure vapor pipeline, that realizes cooling caloric receptivity and unit exhaust steam residual heat has
Effect matching, improves the operational flexibility of high back pressure heating system, realizes thermoelectricity decoupling operation.
Detailed description of the invention
Fig. 1 is the structural representation of the high back pressure heating system of the thermoelectricity decoupling provided in the preferred embodiment in the utility model
Figure；
Fig. 2 is that the structure of the high back pressure heating system of the thermoelectricity decoupling provided in another preferred embodiment of the utility model is shown
It is intended to；
Wherein, 1: low pressure (LP) cylinder；2: intermediate pressure cylinder；3: condenser；4: heat exchangers for district heating；5: high pressure cylinder；6: generator；7: heating
Device；8: cooling device；11: main steam header road；12: the first bypass lines；21: middle pressure vapor pipeline；22: the four bypass pipes
Road；31: low pressure exhaust line；32: water circulating pump；33: third bypass line；41: pumps for hot water supply net；42: the second bypass lines；
111: third inlet valve；121: the first inlet valves；211: the second inlet valves；221: the four inlet valves；331: the second inlet valves；
421: the first inlet valves.
Specific embodiment
It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is a part of the embodiment of the utility model, instead of all the embodiments.Based on the reality in the utility model
Apply example, those of ordinary skill in the art's every other embodiment obtained without making creative work, all
Belong to the range of the utility model protection.
The utility model embodiment provides a kind of high back pressure heating system of thermoelectricity decoupling, and the high back pressure heating system is main
Main steam and reheated steam for cooperating boiler to generate generate electricity, while being added using steam heat to heat supply network recirculated water
Heat.As shown in Figure 1, Fig. 1 is the structure of the high back pressure heating system of the thermoelectricity decoupling provided in the preferred embodiment in the utility model
Schematic diagram, the high back pressure heating system include: low pressure (LP) cylinder 1, intermediate pressure cylinder 2, condenser 3 and heat exchangers for district heating 4.Low pressure (LP) cylinder 1 into
Vapour end is connected to by main steam header road 11 with the first exhaust steam end of intermediate pressure cylinder 2.Second exhaust steam end of intermediate pressure cylinder 2 passes through middle pressure vapour
Pipeline 21 is connected to the admission end of heat exchangers for district heating 4, and low pressure (LP) cylinder 1 is connected by the admission end of low pressure exhaust line 31 and condenser 3
Logical, the backwater outlet of condenser 3 is connected to by pumps for hot water supply net 41 with the return water entrance of heat exchangers for district heating 4.To make cooling heat absorption
Amount and unit exhaust steam residual heat are effectively matched, and in the present embodiment, on main steam header road 11 and are connected to first bypass line 12, and first
Bypass line 12 is equipped with the first inlet valve 121, and middle pressure vapor pipeline 21 is equipped with the second inlet valve 211.Wherein, first into vapour
Valve 121 is coolant valve group, and the second inlet valve 211 is butterfly valve.
The operation method of flexible thermoelectricity decoupling, it is characterised in that the following steps are included:
Step 1 when optimized distributionl is high, adjusts heat supply extraction flow using inlet valve, closes low pressure (LP) cylinder cooling steam
System, condenser is through-flow heat supply network recirculated water, high back pressure mode are run, and steam exhaust all absorbs.
Step 2 when thermic load is low, electric load is high, adjusts heat supply extraction flow using inlet valve, it is cooling to close low pressure (LP) cylinder
Vapour system, condenser flow passage component heat supply network recirculated water, part cooling circulating water, steam exhaust partially absorb.
Step 3, when thermic load is high, electric load is low, excision low pressure (LP) cylinder opens cooling steam system, takes away low pressure (LP) cylinder into vapour
Rotor drum wind-heat amount, condenser is through-flow cooling circulating water, steam exhaust are not recycled.
In the course of work, which uses low level energy heat supply side under the high electric load operating condition of high heat load
Formula, heat supply network recirculated water first pass through condenser 3, are tentatively heated by 1 steam exhaust of low pressure (LP) cylinder to heat supply network recirculated water, enter back into heat supply network and add
Hot device 4 carries out spike heating.In the low electric load operating condition of high heat load, pass through the desuperheat valve of newly-increased cooperation excision low pressure (LP) cylinder operation
Door group, excision low pressure (LP) cylinder 1 are run, i.e. steam off main line 11, are opened the first inlet valve 121 and the second inlet valve 211, are passed through
First bypass line 12 only makes a small amount of steam enter low pressure (LP) cylinder 1 from intermediate pressure cylinder 2, and low pressure (LP) cylinder 1 is made to keep pure condensate operation.If necessary
Anti- wear-resistant coating processing is carried out to several grade blades in 1 rotor of low pressure (LP) cylinder end, and adds matching running monitoring measuring point transformation.According to heat supply network
Circulating Water Parameters regulate and control condenser 3 and heat exchangers for district heating 4, fully enter heat supply network recirculated water in heat exchangers for district heating 4, by intermediate pressure cylinder
The steam that 2 pressure vapor pipelines 21 and exhaust line 22 convey heats recirculated water, solves the low electric load feelings of high heat load
The thermoelectricity of condition decouples.In the low operating condition of electric load high heat load, the first inlet valve 121 and the second inlet valve 221, heat are closed
Net recirculated water opens heat supply network recirculated water and cooling circulating water switching system, condensing via condenser 3, for clammy and cold group
Device is using the partitioned mode of the through-flow heat supply network circulation through-flow cooling circulating water of water section in part, and partition running is mainly according to condensing
The valve of the cooling cycle water lines of device 3 regulates and controls, and shunts part steam exhaust to Air-Cooling Island, using in low pressure (LP) cylinder 1 for air cooling unit
Heat supply network recirculated water is heated in part steam exhaust.
Wherein, high back pressure heating system further include: cooling device.Cooling device passes through cooling water inlet pipeline and condensing
The cooling water inlet of device 3 is connected to, and cooling device is connected to by cooling water outlet pipeline with the cooling water outlet of condenser 3.
In other embodiments, as shown in Fig. 2, cooling device 8 also can be selected Direct Air-cooled Unit heat supply network condenser and
The subregion condenser of the combination of air cooling system, indirect air cooling unit or wet type cooling unit, two sides can through-flow heat supply network recirculated water and cooling
Recirculated water.It can be by adjusting to the steam amount of Air-Cooling Island and condenser 3 come thermoelectricity decoupling, indirect air cooling for Direct Air-cooled Unit
Condenser partitioned mode can be used in unit and wet type cooling unit, improves the cooling capacity to exhaust steam residual heat, realizes thermoelectricity decoupling.
The utility model embodiment provides a kind of high back pressure heating system of thermoelectricity decoupling, cuts off low pressure by newly-increased cooperation
The first bypass line is arranged on the main steam header road 11 of connection low pressure (LP) cylinder 1 and intermediate pressure cylinder 2 in the high back pressure heating system of cylinder operation
12, it is connected to by middle pressure vapor pipeline 21 with the admission end of heat exchangers for district heating 4 in the second exhaust steam end of intermediate pressure cylinder 2, and first
First inlet valve 121 is set on bypass line 12, and the second inlet valve 211 being arranged on pressure vapor pipeline 21 in cooperation is realized cold
But it recepts the caloric and unit exhaust steam residual heat is effectively matched, improve the operational flexibility of high back pressure heating system, realize thermal electrolysis
Coupling operation.
Based on the above embodiment, in a preferred embodiment, as shown in Figure 1, the high back pressure heating system further include:
High pressure cylinder 5 and generator 6.Rotor in high pressure cylinder 5 is connect with the rotor in intermediate pressure cylinder 2 by first shaft coupling, in intermediate pressure cylinder 2
Rotor connect with the rotor in low pressure (LP) cylinder 1 by second shaft coupling, the rotor in low pressure (LP) cylinder by third shaft coupling and power generation
The rotor of machine connects, so that the high temperature and high pressure steam that high back pressure heating system cooperation boiler generates generates electricity.Wherein, for
Boiler feedwater is closed, which further includes regenerative apparatus (not shown), and the condensation-water drain of condenser 3 is logical
It crosses water circulating pump 32 to be connected to regenerative apparatus, to cooperate regenerative apparatus that condensed water is delivered to boiler.
In the course of work, the water supply of regenerative apparatus or condensed water are heated into the steam of high pressure-temperature by boiler, then successively
Into high pressure cylinder 5, intermediate pressure cylinder 2 and low pressure (LP) cylinder 1, mechanical energy is converted by steam thermal energy, pushes high pressure cylinder 5, intermediate pressure cylinder 2 and low pressure
Turbine rotor rotation in cylinder 1, drives generator 6 to generate electricity.Thermal energy is completely converted into electric energy after steam is done work by steam turbine.
If heat supply network workload demand is big, and when the high back pressure heating system generation load is low, residual steam heat is with 1 steam discharge of low pressure (LP) cylinder, that is, weary
The form of vapour introduces condenser 3, and 1 steam discharge of low pressure (LP) cylinder is condensed into condensed water, continues to be sent to boiler circulating-heating.If heat supply network load
Demand is smaller, and when the high back pressure heating system generation load is higher, using the steam in intermediate pressure cylinder 2, pass through middle pressure steam pipe
Road 21 provides thermal energy for the heat supply network recirculated water in heat exchangers for district heating 4.
Based on the above embodiment, in a preferred embodiment, the backwater outlet of heat exchangers for district heating 4 passes through heating plant
7 are connected to the return water entrance of condenser 3.The is equipped between the return water entrance of heat exchangers for district heating 4 and the return water entrance of heating plant 7
Two bypass lines 42, the second bypass line 42 are equipped with the first inlet valve 421, the backwater outlet of condenser 3 and heating plant 7
There is third bypass line 33 at return water between mouth, third bypass line 33 is equipped with the second inlet valve 331.First inlet valve 421
For cooperating the second inlet valve 331, regulated and controled according to heat supply network Circulating Water Parameters situation.In addition, main steam header road 11 is equipped with
Third inlet valve 111, third inlet valve 111 enter the quantity of steam of low pressure (LP) cylinder 1 for regulating and controlling intermediate pressure cylinder 2.The first row of intermediate pressure cylinder 2
The 4th bypass line 22 is equipped between vapour end and the admission end of heat exchangers for district heating 4, the 4th bypass line 22 is equipped with the 4th into vapour
Valve 221, to utilize some vapor in main steam header road 11 or the first bypass line 12.Wherein, the first inlet valve 421, second
Inlet valve 331, third inlet valve 111 and the 4th inlet valve 221 are butterfly valve.
In the course of work, the conventional operation of the high back pressure heating system uses low level energy heat-supplying mode, and heat supply network recirculated water is first
Through-flow condenser 3 tentatively heats heat supply network recirculated water by 1 steam exhaust of low pressure (LP) cylinder, enters back into the progress spike of heat exchangers for district heating 4 and adds
Heat.If heat supply network workload demand is big, and when the high back pressure heating system generation load is low, pass through newly-increased cooperation excision low pressure (LP) cylinder operation
High back pressure heating system, excision low pressure (LP) cylinder 1 runs, i.e. steam off main line 11, open the first inlet valve 121 and second into
Steam valve 211 only makes a small amount of steam enter low pressure (LP) cylinder 1 from intermediate pressure cylinder 2, low pressure (LP) cylinder 1 is made to keep back pressure by the first bypass line 12
Operation.Anti- wear-resistant coating processing is carried out to several grade blades in 1 rotor of low pressure (LP) cylinder end if necessary, and adds matching running monitoring measuring point
Transformation.Regulate and control the first inlet valve 421 according to heat supply network Circulating Water Parameters and the second inlet valve 331, heat supply network recirculated water return water pass through first
Condenser 3 enters back into heat exchangers for district heating 4 after heating, or opening third bypass line 33 makes heat supply network recirculated water enter directly into heat
In net heater 4.If the return water temperature before into heat exchangers for district heating 4 is to reach supply water temperature, openable first inlet valve
421, directly heat supply network recirculated water is sent to heating plant 7.If the return water temperature before into heat exchangers for district heating 4 is not up to for water temperature
Degree, then close the first inlet valve 421, heat supply network recirculated water, which enters after heat exchangers for district heating 4, to be sent again to heating plant 7.If heat supply network load
Demand is smaller, and when the high back pressure heating system generation load is higher, the first inlet valve 121 and the second inlet valve 211 are closed, is beaten
The first inlet valve 421 is opened, the second inlet valve 331 is closed, heat supply network recirculated water directly utilizes steam exhaust in low pressure (LP) cylinder 1 via condenser 3
To be heated to heat supply network recirculated water.
In a specific embodiment, by taking rated power is the clammy high back pressure heating system of 300MW as an example, design
Back pressure 40kPa.Power plant is averaged heat supply network quantity of circulating water 10000t/h, heats just 48 DEG C, 73 DEG C of supply water temperature of return water temperature of latter stage, entirely
Factory's heat supply network recirculated water is directly externally confessed after being heated to 73 DEG C using condenser basis, and the full steam exhaust operating condition of high back pressure heating system is most
Low operating condition is 200MW, and corresponding recyclable unit steam amount is 462t/h, corresponding heating heat supply network thermic load 1093GJ/h.This reality
Apply the high back pressure heating system in example, when dispatching of power netwoks unit generation load increase, as generation load require be 240MW when, this
When the corresponding steam amount of high back pressure heating system be 543t/h, be greater than heat supply network demand thermic load, at this point, condenser subregion is remaining
77t/h steam exhaust is absorbed by recirculated cooling water, cooling by the cooling tower (cooling device) of adjacent machine.When dispatching of power netwoks load is 150MW
When, the steam amount of corresponding high back pressure heating system is reduced, and only cannot be guaranteed heat demand by the steam exhaust of high back pressure heating system, is utilized
High back pressure heating system switches to low pressure (LP) cylinder excision state, and low pressure (LP) cylinder keeps low back pressure operation, and heat supply network recirculated water, which fully enters, to be added
Hot device is outer after being heated to 73 DEG C by middle row's steam extraction to be supplied.
To sum up, the high back pressure heating system of thermoelectricity decoupling provided by the embodiment of the utility model passes through newly-increased cooperation excision
The high back pressure heating system of low pressure (LP) cylinder operation, the first bypass of setting on the main steam header road 11 of connection low pressure (LP) cylinder 1 and intermediate pressure cylinder 2
Pipeline 12 is connected to by middle pressure vapor pipeline 21 with the admission end of heat exchangers for district heating 4 in the second exhaust steam end of intermediate pressure cylinder 2, and
First inlet valve 121 is set on first bypass line 12, and the second inlet valve 211 being arranged on pressure vapor pipeline 21 in cooperation is real
Now cooling caloric receptivity and unit exhaust steam residual heat are effectively matched, the electric load of more conventional high back pressure heating system under same thermic load
Adjustable range substantially increases, and can effectively promote the heat supply running flexibility of high back pressure heating system, furthermore the high back pressure heat supply system
System also reduces heating parameter using steam exhaust, has taken into account economy.
Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations；
Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that:
It is still possible to modify the technical solutions described in the foregoing embodiments, or part of technical characteristic is carried out etc.
With replacement；And these are modified or replaceed, various embodiments of the utility model technology that it does not separate the essence of the corresponding technical solution
The spirit and scope of scheme.
Claims (10)
1. a kind of high back pressure heating system of thermoelectricity decoupling characterized by comprising
Low pressure (LP) cylinder, intermediate pressure cylinder, condenser and heat exchangers for district heating；
The admission end of the low pressure (LP) cylinder is connected to by main steam header road with the first exhaust steam end of medium pressure cylinder；Medium pressure cylinder
Second exhaust steam end is connected to by middle pressure vapor pipeline with the admission end of the heat exchangers for district heating, and the low pressure (LP) cylinder passes through low pressure steam discharge
Pipeline is connected to the admission end of the condenser, and the backwater outlet of the condenser is heated by pumps for hot water supply net and the heat supply network
The return water entrance of device is connected to；Wherein, main steam header road and it is connected to the first bypass line, is set on first bypass line
There is the first inlet valve, medium pressure exhaust line is equipped with the second inlet valve.
2. high back pressure heating system according to claim 1, which is characterized in that the backwater outlet of the heat exchangers for district heating is logical
Heating plant is crossed to be connected to the return water entrance of the condenser；The return water entrance of the heat exchangers for district heating and the heating plant
The second bypass line is equipped between return water entrance, second bypass line is equipped with the first inlet valve；The condenser returns
Third bypass line is equipped at the return water of water out and the heating plant between mouth, the third bypass line is equipped with second
Inlet valve.
3. high back pressure heating system according to claim 2, which is characterized in that main steam header road be equipped with third into
Steam valve, the third inlet valve enter the quantity of steam of the low pressure (LP) cylinder for regulating and controlling medium pressure cylinder.
4. high back pressure heating system according to claim 3, which is characterized in that the first exhaust steam end of medium pressure cylinder and institute
It states and is equipped with the 4th bypass line between the admission end of heat exchangers for district heating, the 4th bypass line is equipped with the 4th inlet valve.
5. high back pressure heating system according to claim 4, which is characterized in that first inlet valve, described second into
Water valve, the third inlet valve and the 4th inlet valve are butterfly valve.
6. high back pressure heating system according to claim 1, which is characterized in that first inlet valve is coolant valve
Group.
7. high back pressure heating system according to claim 1, which is characterized in that further include: high pressure cylinder and generator；It is described
Rotor in high pressure cylinder is connect with the rotor in medium pressure cylinder by first shaft coupling；Rotor in medium pressure cylinder with it is described
Rotor in low pressure (LP) cylinder is connected by second shaft coupling；Rotor in the low pressure (LP) cylinder passes through third shaft coupling and the generator
Rotor connection.
8. high back pressure heating system according to claim 1, which is characterized in that further include: cooling device；The cooling dress
It sets and is connected to by cooling water inlet pipeline with the cooling water inlet of the condenser, the cooling device passes through cooling water outlet pipe
Road is connected to the cooling water outlet of the condenser.
9. high back pressure heating system according to claim 8, which is characterized in that the cooling device is Direct Air-cooled Unit
Heat supply network condenser and the combination of air cooling system, indirect air cooling unit or wet type cooling unit subregion condenser, two sides can through-flow heat
Net recirculated water and cooling circulating water.
10. high back pressure heating system according to claim 1, which is characterized in that further include: regenerative apparatus；The condensing
The condensation-water drain of device is connected to by water circulating pump with regenerative apparatus, to cooperate the regenerative apparatus that condensed water is delivered to pot
Furnace.
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| CN111472856A (en) * | 2020-04-07 | 2020-07-31 | 山东华电节能技术有限公司 | Low-pressure cylinder zero-power heat supply system of wet cooling unit and working method |
| CN111878949A (en) * | 2020-08-28 | 2020-11-03 | 西安热工研究院有限公司 | Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation |
| CN112611010A (en) * | 2020-11-30 | 2021-04-06 | 华北电力大学 | Flexible adjusting system and method for power generation load of multi-heat-source cogeneration unit |
| CN113091112A (en) * | 2021-04-15 | 2021-07-09 | 晟源高科(北京)科技有限公司 | Thermoelectric decoupling system combining low-back-pressure cutting cylinder and compression heat pump |
| CN114508773A (en) * | 2021-12-29 | 2022-05-17 | 东方电气集团东方汽轮机有限公司 | Flexible high-back-pressure heat supply system and heat supply method thereof |
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| CN111472856A (en) * | 2020-04-07 | 2020-07-31 | 山东华电节能技术有限公司 | Low-pressure cylinder zero-power heat supply system of wet cooling unit and working method |
| CN111878949A (en) * | 2020-08-28 | 2020-11-03 | 西安热工研究院有限公司 | Low-pressure-cylinder few-steam heating system and method capable of achieving annual operation |
| CN112611010A (en) * | 2020-11-30 | 2021-04-06 | 华北电力大学 | Flexible adjusting system and method for power generation load of multi-heat-source cogeneration unit |
| CN113091112A (en) * | 2021-04-15 | 2021-07-09 | 晟源高科(北京)科技有限公司 | Thermoelectric decoupling system combining low-back-pressure cutting cylinder and compression heat pump |
| CN113091112B (en) * | 2021-04-15 | 2022-11-15 | 晟源高科(北京)科技有限公司 | Thermoelectric decoupling system with low back pressure cutting cylinder and compression heat pump combined |
| CN114508773A (en) * | 2021-12-29 | 2022-05-17 | 东方电气集团东方汽轮机有限公司 | Flexible high-back-pressure heat supply system and heat supply method thereof |
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