CN209212321U - One kind is coagulated in combination for two units takes out back heating system - Google Patents
One kind is coagulated in combination for two units takes out back heating system Download PDFInfo
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- CN209212321U CN209212321U CN201821810071.8U CN201821810071U CN209212321U CN 209212321 U CN209212321 U CN 209212321U CN 201821810071 U CN201821810071 U CN 201821810071U CN 209212321 U CN209212321 U CN 209212321U
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Abstract
It is coagulated in combination the utility model relates to one kind for two units and takes out back heating system.It includes: the first cogeneration units, second cogeneration units and cooling steam system, cogeneration units include Steam Turbine Through IP Admission, turbine low pressure cylinder, condenser, cooling tower and the first heat exchangers for district heating, cooling steam system includes reducing-and-cooling plant and water separator, the air intake of cooling steam system is connect with the first Steam Turbine Through IP Admission and the second Steam Turbine Through IP Admission simultaneously, the venthole of cooling steam system is connect with the first turbine low pressure cylinder and the second turbine low pressure cylinder simultaneously, the circulation of first cogeneration units and the second cogeneration units realizes networking by circulating backwater bypass and circulating water supply bypass.The utility model realizes one or the back pressure supplying thermal condition operation simultaneously of two cogeneration units, while giving full play to steam power plant's external heat capacity, improves the flexibility and reliability of external heat supply steam extraction.
Description
Technical field
The utility model belongs to cogeneration of heat and power technical field, and in particular to one kind is coagulated in combination for two units takes out back heat supply
System.
Background technique
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 usually 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 unit 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, just be able to satisfy the peak regulation demand of power grid, this brings to coal-fired thermal power unit
Great challenge.
Currently, patent " steam turbine extraction condensing back pressure system and its adjusting method (patent No. 201710193938.3) ", without more
Exchanging rotor can be realized low pressure (LP) cylinder and not put into operation, which can not only increase external heating load to the greatest extent, but also can be high
The realization unit underload of benefit generates electricity.Patent " the cooling system and the working method (patent No. of excision low pressure (LP) cylinder heat supply
201711165679.X) ", low pressure (LP) cylinder is carried out when realizing low pressure (LP) cylinder not into vapour effectively cooling.
However, while constantly reinforcing coal motor group thermoelectricity requirement on flexibility, due to the fast development of central heating,
So that the external heating demand of unit constantly increases.At this point, for the steam power plant for possessing two thermoelectricity units, if can be sufficiently
The advantage of two thermoelectricity units is played, the external heat capacity of steam power plant is further promoted, is conducive to steam power plant and seizes heat supply city
, create bigger economic benefit.The application is then the innovation and creation for being directed to this phenomenon and carrying out.
Utility model content
The purpose of the utility model is to overcome the above deficiencies in the existing technologies, and provide it is a kind of design rationally,
Back heating system is taken out in coagulating in combination for two units for reliable performance.
The technical scheme in the invention for solving the above technical problem is: one kind coagulates to take out to carry on the back for two units in combination to be supplied
Hot systems, which is characterized in that it includes: the first cogeneration units, the second cogeneration units and cooling steam system；
First cogeneration units include the first Steam Turbine Through IP Admission, the first turbine low pressure cylinder, the first condenser, first
The steam drain of cooling tower and the first heat exchangers for district heating, first Steam Turbine Through IP Admission passes through the first communicating pipe and the first steam turbine
The air intake of low pressure (LP) cylinder connects, and the first hydraulic pressure butterfly valve is equipped on the first communicating pipe, first turbine low pressure cylinder
Steam drain is connect with the first condenser, and the recirculated water side of first condenser is returned by first circulation water supplying pipe and first circulation
Water pipe is connect with the first cooling tower, and is sequentially installed with No.1 circulation valve along water flowing direction on first circulation water supplying pipe
With No. two circulation valves, No. four circulation valves are sequentially installed with along water flowing direction on first circulation return pipe and No. three are followed
Ring valve door, the steam drain of first Steam Turbine Through IP Admission also pass through the first heating extraction steam pipe and connect with the first heat exchangers for district heating,
And the first heat supply network valve is installed on the first heating extraction steam pipe；
Second cogeneration units include the second Steam Turbine Through IP Admission, the second turbine low pressure cylinder, the second condenser, second
The steam drain of cooling tower and the second heat exchangers for district heating, second Steam Turbine Through IP Admission passes through the second communicating pipe and the second steam turbine
The air intake of low pressure (LP) cylinder connects, and the second hydraulic pressure butterfly valve is equipped on the second communicating pipe, second turbine low pressure cylinder
Steam drain is connect with the second condenser, and the recirculated water side of second condenser is returned by second circulation water supplying pipe and second circulation
Water pipe is connect with the second cooling tower, and is sequentially installed with No. five circulation valves along water flowing direction on second circulation water supplying pipe
With No. six circulation valves, No. eight circulation valves are sequentially installed with along water flowing direction on second circulation return pipe and No. seven are followed
Ring valve door, the steam drain of second Steam Turbine Through IP Admission also pass through the second heating extraction steam pipe and connect with the second heat exchangers for district heating,
And the second heat supply network valve is installed on the second heating extraction steam pipe；
The first circulation water supplying pipe is bypassed by circulating water supply and is connect with second circulation water supplying pipe, and by circulating water supply
Road is equipped with water supply bypass valve, and the first circulation return pipe is connected by circulating backwater bypass with second circulation return pipe
It connects, and return water bypass valve is installed in circulating backwater bypass；
The cooling steam system includes reducing-and-cooling plant and water separator, the reducing-and-cooling plant into vapour
Mouth is connect with the venthole of cooling steam general pipeline, and is sequentially installed with temperature along steam flow direction on cooling steam general pipeline
Summary table and pressure summary table, the air intake of the cooling steam general pipeline are connect with the venthole of the first cooling steam general pipeline, and described
The air intake of one cooling steam general pipeline is connect with the steam drain of the first Steam Turbine Through IP Admission, and is pacified on the first cooling steam general pipeline
Equipped with the first cooling total valve, the venthole of the reducing-and-cooling plant and the air intake of water separator are connected, the vapour
The venthole of water separation device by the first cooling steam pipe and the second cooling steam pipe respectively with the first turbine low pressure cylinder
The air intake of air intake and the second turbine low pressure cylinder connection, and on the first cooling steam pipe along steam flow direction successively
First coolant valve, first flow instrument, first pressure gauge, the first thermometer and the first gate valve are installed, in the second cooling steam
Pipe on along steam flow direction be sequentially installed with the second coolant valve, second flow instrument, second pressure gauge, second temperature table and
Second gate valve.
Preferably, the air intake of the cooling steam general pipeline is also connect with the venthole of the second cooling steam general pipeline, institute
The air intake for stating the second cooling steam general pipeline is connect with the steam drain of the second Steam Turbine Through IP Admission, and in the second cooling steam general pipeline
On the second cooling total valve is installed.
Preferably, one end of the circulating water supply bypass is connected between No.1 circulation valve and No. two circulation valves,
The other end of the circulating water supply bypass is connected between No. five circulation valves and No. six circulation valves.
Preferably, one end of the circulating backwater bypass is connected between No. three circulation valves and No. four circulation valves,
The other end of the circulating backwater bypass is connected between No. seven circulation valves and No. eight circulation valves.
Preferably, first hydraulic pressure butterfly valve and the second hydraulic pressure butterfly valve are the valve without mechanical position limitation, when valve closes entirely
Shi Liuti No leakage.
The above-mentioned operation method for coagulating pumping back heating system in combination for two units is as follows:
In the operation of extraction for heat supply operating condition:
Close the first cooling total valve, the second cooling total valve, the first coolant valve, the second coolant valve, the first gate valve
With the second gate valve, cooling steam system is in off state；
Open and adjust the first hydraulic pressure butterfly valve, the second hydraulic pressure butterfly valve, the first heat supply network valve and the second heat supply network valve, the first heat
Electricity Federation produces unit and the second cogeneration units are the operation of extraction for heat supply operating condition, at this point, one of the first Steam Turbine Through IP Admission
Steam discharge is divided to do work by entering the first turbine low pressure cylinder the first communicating pipe, another part row of the first Steam Turbine Through IP Admission
Vapour enters the first heat exchangers for district heating by the first heating extraction steam pipe and externally carries out heat supply；A part row of second Steam Turbine Through IP Admission
Vapour is done work by entering the second turbine low pressure cylinder the second communicating pipe, and another part steam discharge of the second Steam Turbine Through IP Admission is logical
It crosses the second heating extraction steam pipe and externally carries out heat supply into the second heat exchangers for district heating.
In the operation of back pressure supplying thermal condition:
The cooling total valve of closing second opens the first cooling total valve, and cooling steam system is open state, and cooling is steamed
The vapour source of vapour comes from the first Steam Turbine Through IP Admission；
The first hydraulic pressure butterfly valve to be closed, the first heat supply network valve is opened, the first cogeneration units are the operation of back pressure supplying thermal condition,
It is externally supplied at this point, whole steam discharges of the first Steam Turbine Through IP Admission enter the first heat exchangers for district heating by the first heating extraction steam pipe
Heat opens simultaneously the first coolant valve and the first gate valve, and the cooling steam after pressure and temperature reducing and dehumidifying is cooling by first
Steam pipe enters the first turbine low pressure cylinder, cools down to the first turbine low pressure cylinder；
The second hydraulic pressure butterfly valve to be closed, the second heat supply network valve is opened, the second cogeneration units are the operation of back pressure supplying thermal condition,
It is externally supplied at this point, whole steam discharges of the second Steam Turbine Through IP Admission enter the second heat exchangers for district heating by the second heating extraction steam pipe
Heat opens simultaneously the second coolant valve and the second gate valve, and the cooling steam after pressure and temperature reducing and dehumidifying is cooling by second
Steam pipe enters the second turbine low pressure cylinder, cools down to the second turbine low pressure cylinder.
When extraction for heat supply operating condition is run, and heating demand needed for the external world is lower:
The external steam extraction amount of first cogeneration units and the second cogeneration units is lower, at this point, opening No.1 circulation
Valve, No. two circulation valves, No. three circulation valves, No. four circulation valves, No. five circulation valves, No. six circulation valves, No. seven follow
The circulation of ring valve door and No. eight circulation valves, the first cogeneration units and the second cogeneration units is opening state
State, simultaneously closes off water supply bypass valve and return water bypass valve, and circulating water supply bypass and circulating backwater bypass are in off state；
When extraction for heat supply operating condition is run, and heating demand needed for the external world is larger:
When the external steam extraction amount of the first cogeneration units is larger and the external steam extraction amount of the second cogeneration units is lower
When, at this point, closing No. two circulation valves, No. four circulation valves, open No.1 circulation valve, No. three circulation valves, No. five circulations
Valve, No. six circulation valves, No. seven circulation valves and No. eight circulation valves, open simultaneously water supply bypass valve and return water bypass valve
Door, the first cooling tower are in off state, and the recirculated water for passing in and out the first condenser is defeated by circulating water supply bypass and circulating backwater bypass
It send to the second cooling tower, it is possible thereby to play antifreeze effect to the first cooling tower；
When the external steam extraction amount of the second cogeneration units is larger and the external steam extraction amount of the first cogeneration units is lower
When, at this point, closing No. six circulation valves and No. eight circulation valves, open No.1 circulation valve, No. two circulation valves, No. three circulations
Valve, No. four circulation valves, No. five circulation valves and No. seven circulation valves, open simultaneously water supply bypass valve and return water bypass valve
Door, the second cooling tower are in off state, and the recirculated water for passing in and out the second condenser is defeated by circulating water supply bypass and circulating backwater bypass
It send to the first cooling tower, it is possible thereby to play antifreeze effect to the second cooling tower；
When the external steam extraction amount of the first cogeneration units and the second cogeneration units is larger, at this point, first is cold
But tower and the second cooling tower can choose one of cooling tower operation, another cooling tower is closed, it is possible thereby to cold to first
But tower or the second cooling tower play antifreeze effect.
In the operation of back pressure supplying thermal condition, the first cooling total valve can also be closed, opens the second cooling total valve, at this time
The vapour source of cooling steam comes from the second Steam Turbine Through IP Admission.
In the operation of back pressure supplying thermal condition, according to the demand of extraneous heating demand, it can choose the first cogeneration units
For back pressure supplying thermal condition operation or the second cogeneration units be back pressure supplying thermal condition operation or the first cogeneration units with
Second cogeneration units are the operation of back pressure supplying thermal condition.
When the first cogeneration units are that back pressure supplying thermal condition is run, at this point, closing No. two circulation valves, No. four circulations
Valve opens No.1 circulation valve, No. three circulation valves, No. five circulation valves, No. six circulation valves, No. seven circulation valves and eight
Number circulation valve, opens simultaneously water supply bypass valve and return water bypass valve, and the first cooling tower closed state passes in and out the first condensing
The recirculated water of device is delivered to the second cooling tower by circulating water supply bypass and circulating backwater bypass, it is possible thereby to rise to the first cooling tower
To antifreeze effect；
When the second cogeneration units are that back pressure supplying thermal condition is run, followed at this point, closing No. six circulation valves and No. eight
Ring valve door, open No.1 circulation valve, No. two circulation valves, No. three circulation valves, No. four circulation valves, No. five circulation valves and
No. seven circulation valves open simultaneously water supply bypass valve and return water bypass valve, and the second cooling tower is in off state, disengaging second
The recirculated water of condenser is delivered to the first cooling tower by circulating water supply bypass and circulating backwater bypass, it is possible thereby to cooling to second
Tower plays antifreeze effect；
When the first cogeneration units and the second cogeneration units are the operation of back pressure supplying thermal condition, at this point, first
Cooling tower and the second cooling tower can choose one of cooling tower operation, another cooling tower is closed, it is possible thereby to first
Cooling tower or the second cooling tower play antifreeze effect.
The utility model compared with prior art, has the following advantages that and effect: (1) the utility model is designed reasonably, knot
Structure is simple, reliable performance, creates a kind of coagulate in combination for two units and takes out back heating system；(2) the utility model can be with
Source of the steam discharge of first Steam Turbine Through IP Admission as cooling steam, and can be using the steam discharge of the second Steam Turbine Through IP Admission as cooling
The source of steam improves the flexibility and reliability of cooling steam selection vapour source；(3) the utility model both may be implemented one
The operation of cogeneration units back pressure supplying thermal condition, and the back pressure supplying thermal condition operation simultaneously of two cogeneration units may be implemented,
While giving full play to steam power plant's external heat capacity, the flexibility and reliability of external heat supply steam extraction are improved；(4) this reality
With the novel networking for realizing two cogeneration units circulations, avoiding makes because of upper tower recirculated water shortage of heat
It obtains cooling tower and the phenomenon that frosting, freeze occurs, improve the safety of thermoelectricity unit operation.
Detailed description of the invention
Fig. 1 is to coagulate the structural schematic diagram for taking out back heating system in the utility model embodiment in combination for two units.
Specific embodiment
The utility model is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is pair
The explanation of the utility model and the utility model is not limited to following embodiment.
Embodiment.
Referring to Fig. 1, coagulating in combination in the present embodiment for two units takes out back heating system, it includes: the first thermoelectricity connection
Produce unit, the second cogeneration units and cooling steam system；
First cogeneration units include the first Steam Turbine Through IP Admission 11, the first turbine low pressure cylinder 12, the first condenser
13, the steam drain of the first cooling tower 14 and the first heat exchangers for district heating 15, the first Steam Turbine Through IP Admission 11 passed through for the first communicating pipe 101
It is connect with the air intake of the first turbine low pressure cylinder 12, and the first hydraulic pressure butterfly valve 16 is installed on the first communicating pipe 101, first
The steam drain of turbine low pressure cylinder 12 is connect with the first condenser 13, and the recirculated water side of the first condenser 13 is supplied by first circulation
Water pipe 103 and first circulation return pipe 104 are connect with the first cooling tower 14, and along water flow on first circulation water supplying pipe 103
Dynamic direction is sequentially installed with No.1 circulation valve 116 and No. two circulation valves 117, along dampening on first circulation return pipe 104
Flow direction is sequentially installed with No. four circulation valves 119 and No. three circulation valves 118, the steam drain of the first Steam Turbine Through IP Admission 11
It is also connect with the first heat exchangers for district heating 15 by the first heating extraction steam pipe 102, and is equipped on the first heating extraction steam pipe 102 the
One heat supply network valve 17；
Second cogeneration units include the second Steam Turbine Through IP Admission 21, the second turbine low pressure cylinder 22, the second condenser
23, the steam drain of the second cooling tower 24 and the second heat exchangers for district heating 25, the second Steam Turbine Through IP Admission 21 passed through for the second communicating pipe 201
It is connect with the air intake of the second turbine low pressure cylinder 22, and the second hydraulic pressure butterfly valve 26 is installed on the second communicating pipe 201, second
The steam drain of turbine low pressure cylinder 22 is connect with the second condenser 23, and the recirculated water side of the second condenser 23 is supplied by second circulation
Water pipe 203 and second circulation return pipe 204 are connect with the second cooling tower 24, and along water flow on second circulation water supplying pipe 203
Dynamic direction is sequentially installed with No. five circulation valves 216 and No. six circulation valves 217, along dampening on second circulation return pipe 204
Flow direction is sequentially installed with No. eight circulation valves 219 and No. seven circulation valves 218, the steam drain of the second Steam Turbine Through IP Admission 21
It is also connect with the second heat exchangers for district heating 25 by the second heating extraction steam pipe 202, and is equipped on the second heating extraction steam pipe 202 the
Two heat supply network valves 27；
First circulation water supplying pipe 103 is connect by circulating water supply bypass 7 with second circulation water supplying pipe 203, and is supplied in circulation
Water supply bypass valve 9 is installed, one end of circulating water supply bypass 7 is connected to No.1 circulation valve 116 and follows with No. two in water bypass 7
Between ring valve door 117, the other end of circulating water supply bypass 7 be connected to No. five circulation valves 216 and No. six circulation valves 217 it
Between；First circulation return pipe 104 is connect by circulating backwater bypass 8 with second circulation return pipe 204, and is bypassed in circulating backwater
Return water bypass valve 10 is installed on 8；One end of circulating backwater bypass 8 is connected to No. three circulation valves 118 and No. four circulating valves
Between door 119, the other end of circulating backwater bypass 8 is connected between No. seven circulation valves 218 and No. eight circulation valves 219.
Cooling steam system includes reducing-and-cooling plant 1 and water separator 2, the air intake of reducing-and-cooling plant 1 with
The venthole of cooling steam general pipeline 5 connects, and it is total on cooling steam general pipeline 5 along steam flow direction to be sequentially installed with temperature
Table 3 and pressure summary table 4, the air intake of cooling steam general pipeline 5 are connect with the venthole of the first cooling steam general pipeline 106, and first is cold
But the air intake of main steam range 106 is connect with the steam drain of the first Steam Turbine Through IP Admission 11, and in the first cooling steam general pipeline 106
On the first cooling total valve 120 is installed, the venthole of reducing-and-cooling plant 1 is connect with the air intake of water separator 2, vapour
The venthole of water separation device 2 is low with the first steam turbine respectively by the first cooling steam pipe 105 and the second cooling steam pipe 205
The connection of the air intake of the air intake of cylinder pressure 12 and the second turbine low pressure cylinder 22, and along steaming on the first cooling steam pipe 105
Vapour flow direction is sequentially installed with the first coolant valve 115, first flow instrument 114, first pressure gauge 113, the first thermometer 112
With the first gate valve 111, on the second cooling steam pipe 205 along steam flow direction be sequentially installed with the second coolant valve 215,
Second flow instrument 214, second pressure gauge 213, second temperature table 212 and the second gate valve 211.
In the present embodiment, the air intake of cooling steam general pipeline 5 also connects with the venthole of the second cooling steam general pipeline 206
It connects, the air intake of the second cooling steam general pipeline 206 is connect with the steam drain of the second Steam Turbine Through IP Admission 21, and in the second cooling steaming
Second cooling total valve 220 is installed on vapour general pipeline 206.
In the present embodiment, the first hydraulic pressure butterfly valve 16 and the second hydraulic pressure butterfly valve 26 are the valve without mechanical position limitation, work as valve
Fluid No leakage when full pass.
The above-mentioned operation method for coagulating pumping back heating system in combination for two units is as follows:
(1) when extraction for heat supply operating condition is run:
Close the first cooling total valve 120, second cooling total valve 220, the first coolant valve 115, the second coolant valve
215, the first gate valve 111 and the second gate valve 211, cooling steam system are in off state；
Open and adjust the first hydraulic pressure butterfly valve 16, the second hydraulic pressure butterfly valve 26, the first heat supply network valve 17 and the second heat supply network valve
27, the first cogeneration units and the second cogeneration units are the operation of extraction for heat supply operating condition, at this point, pressing in the first steam turbine
A part of steam discharge of cylinder 11 is done work by the first communicating pipe 101 into the first turbine low pressure cylinder 12, in the first steam turbine
Another part steam discharge of cylinder pressure 11 enters the first heat exchangers for district heating 15 by the first heating extraction steam pipe 102 and externally carries out heat supply；The
A part of steam discharge of two Steam Turbine Through IP Admissions 21 is done work by the second communicating pipe 201 into the second turbine low pressure cylinder 22,
Another part steam discharge of second Steam Turbine Through IP Admission 21 enters the second heat exchangers for district heating 25 externally by the second heating extraction steam pipe 202
Carry out heat supply.
(2) when back pressure supplying thermal condition is run:
The second cooling total valve 220 to be closed, the first cooling total valve 120 is opened, cooling steam system is open state, and
The vapour source of cooling steam comes from the first Steam Turbine Through IP Admission 11；
The first hydraulic pressure butterfly valve 16 is closed, the first heat supply network valve 17 is opened, the first cogeneration units are back pressure supplying thermal condition
Operation, at this point, whole steam discharges of the first Steam Turbine Through IP Admission 11 enter the first heat exchangers for district heating by the first heating extraction steam pipe 102
15 externally carry out heat supplies, open simultaneously the first coolant valve 115 and the first gate valve 111, by pressure and temperature reducing with dehumidify after it is cold
But steam enters the first turbine low pressure cylinder 12 by the first cooling steam pipe 105, carries out to the first turbine low pressure cylinder 12 cold
But；
The second hydraulic pressure butterfly valve 26 is closed, the second heat supply network valve 27 is opened, the second cogeneration units are back pressure supplying thermal condition
Operation, at this point, whole steam discharges of the second Steam Turbine Through IP Admission 21 enter the second heat exchangers for district heating by the second heating extraction steam pipe 202
25 externally carry out heat supplies, open simultaneously the second coolant valve 215 and the second gate valve 211, by pressure and temperature reducing with dehumidify after it is cold
But steam enters the second turbine low pressure cylinder 22 by the second cooling steam pipe 205, carries out to the second turbine low pressure cylinder 22 cold
But.
When extraction for heat supply operating condition is run, and heating demand needed for the external world is lower:
The external steam extraction amount of first cogeneration units and the second cogeneration units is lower, at this point, opening No.1 circulation
The circulation valve 119, five circulation valve 216, six of circulation valve 118, four of circulation valve 117, three of valve 116, two
217, No. seven circulation valves 218 of circulation valve and No. eight circulation valves 219, the first cogeneration units and the second cogeneration of heat and power machine
The circulation of group is open state, simultaneously closes off water supply bypass valve 9 and return water bypass valve 10, circulating water supply bypass
7 and circulating backwater bypass 8 be in off state.
When extraction for heat supply operating condition is run, and heating demand needed for the external world is larger:
When the external steam extraction amount of the first cogeneration units is larger and the external steam extraction amount of the second cogeneration units is lower
When, at this point, closing 117, No. four circulation valves 119 of No. two circulation valves, open 116, No. three circulation valves of No.1 circulation valve
118, No. five circulation valves 218 of circulation valve 217, seven of circulation valve 216, six and No. eight circulation valves 219, open simultaneously
Water supply bypass valve 9 and return water bypass valve 10, the first cooling tower 14 are in off state, and pass in and out the recirculated water of the first condenser 13
Second cooling tower 24 is delivered to by circulating water supply bypass 7 and circulating backwater bypass 8, it is possible thereby to play to the first cooling tower 14 anti-
The effect of jelly；
When the external steam extraction amount of the second cogeneration units is larger and the external steam extraction amount of the first cogeneration units is lower
When, at this point, closing No. six circulation valves 217 and No. eight circulation valves 219, open 116, No. two circulation valves of No.1 circulation valve
117, No. three circulation valves 216 of circulation valve 119, five of circulation valve 118, four and No. seven circulation valves 218, open simultaneously
Water supply bypass valve 9 and return water bypass valve 10, the second cooling tower 24 are in off state, and pass in and out the recirculated water of the second condenser 23
First cooling tower 14 is delivered to by circulating water supply bypass 7 and circulating backwater bypass 8, it is possible thereby to play to the second cooling tower 24 anti-
The effect of jelly；
When the external steam extraction amount of the first cogeneration units and the second cogeneration units is larger, at this point, first is cold
But tower 14 and the second cooling tower 24 can choose the operation of one of cooling tower, another cooling tower is closed, it is possible thereby to the
One cooling tower 14 or the second cooling tower 24 play antifreeze effect.
In the operation method of the present embodiment, in the operation of back pressure supplying thermal condition, the first cooling total valve can also be closed
120, the second cooling total valve 220 is opened, the vapour source of cooling steam comes from the second Steam Turbine Through IP Admission 21 at this time.
It,, can according to the demand of extraneous heating demand in the operation of back pressure supplying thermal condition in the operation method of the present embodiment
Using select the first cogeneration units as back pressure supplying thermal condition operation or the second cogeneration units be back pressure supplying thermal condition transport
Capable or the first cogeneration units and the second cogeneration units are the operation of back pressure supplying thermal condition.
When the first cogeneration units are that back pressure supplying thermal condition is run, at this point, closing No. two circulation valve 117, four
Circulation valve 119 opens the circulation valve 118, five of No.1 circulation valve 116, three 216, No. six circulation valves of circulation valve
217, No. seven circulation valves 218 and No. eight circulation valves 219, open simultaneously water supply bypass valve 9 and return water bypass valve 10, the
One cooling tower, 14 closed state passes in and out the recirculated water of the first condenser 13 by 8 conveying of circulating water supply bypass 7 and circulating backwater bypass
To the second cooling tower 24, it is possible thereby to play antifreeze effect to the first cooling tower 14；
When the second cogeneration units are that back pressure supplying thermal condition is run, at this point, closing No. six circulation valves 217 and No. eight
Circulation valve 219 opens the circulation valve 117, three of No.1 circulation valve 116, two 118, No. four circulation valves of circulation valve
119, No. five circulation valves 216 and No. seven circulation valves 218, open simultaneously water supply bypass valve 9 and return water bypass valve 10, the
Two cooling towers 24 are in off state, and the recirculated water for passing in and out the second condenser 23 is defeated by circulating water supply bypass 7 and circulating backwater bypass 8
It send to the first cooling tower 14, it is possible thereby to play antifreeze effect to the second cooling tower 24；
When the first cogeneration units and the second cogeneration units are the operation of back pressure supplying thermal condition, at this point, first
Cooling tower 14 and the second cooling tower 24 can choose one of cooling tower operation, another cooling tower is closed, it is possible thereby to right
First cooling tower 14 or the second cooling tower 24 play antifreeze effect.
In the carrying out practically method of the present embodiment, the first gate valve 111 and the second gate valve 211 are respectively provided with the function of truncation
Can, remaining valve all has the function of adjusting pipeline fluid flow.
In the operation of back pressure supplying thermal condition, the cylinder temperature that system is monitored is monitored according to the low pressure (LP) cylinder DCS of thermoelectricity unit
Numerical value, according to numeric feedback measured by all kinds of flow instruments, pressure gauge and thermometer, to adjust into the first turbine low pressure cylinder
12 and second turbine low pressure cylinder 22 the parameter values such as cooling steam flow, pressure and temperature, to realize to turbine low pressure cylinder
Be fully cooled.
Although the utility model is disclosed as above with embodiment, its protection scope being not intended to limit the utility model,
Any technical staff for being familiar with this technology, it is made in the conception and scope for not departing from the utility model to change and retouch,
It all should belong to the protection range of the utility model.
Claims (5)
1. one kind is coagulated in combination for two units takes out back heating system, which is characterized in that including the first cogeneration units, second
Cogeneration units and cooling steam system；
First cogeneration units are coagulated including the first Steam Turbine Through IP Admission (11), the first turbine low pressure cylinder (12), first
Vapour device (13), the first cooling tower (14) and the first heat exchangers for district heating (15), the steam drain of first Steam Turbine Through IP Admission (11)
It is connect by the first communicating pipe (101) with the air intake of the first turbine low pressure cylinder (12), and pacified on the first communicating pipe (101)
Equipped with the first hydraulic pressure butterfly valve (16), the steam drain of first turbine low pressure cylinder (12) is connect with the first condenser (13), institute
The recirculated water side for stating the first condenser (13) passes through first circulation water supplying pipe (103) and first circulation return pipe (104) and first
Cooling tower (14) connection, and No.1 circulation valve is sequentially installed with along water flowing direction on first circulation water supplying pipe (103)
(116) and No. two circulation valves (117) No. four, are sequentially installed with along water flowing direction on first circulation return pipe (104)
Circulation valve (119) and No. three circulation valves (118), the steam drain of first Steam Turbine Through IP Admission (11) also pass through first and adopt
Warm extraction steam pipe (102) are connect with the first heat exchangers for district heating (15), and are equipped with the first heat supply network on the first heating extraction steam pipe (102)
Valve (17)；
Second cogeneration units are coagulated including the second Steam Turbine Through IP Admission (21), the second turbine low pressure cylinder (22), second
Vapour device (23), the second cooling tower (24) and the second heat exchangers for district heating (25), the steam drain of second Steam Turbine Through IP Admission (21)
It is connect by the second communicating pipe (201) with the air intake of the second turbine low pressure cylinder (22), and pacified on the second communicating pipe (201)
Equipped with the second hydraulic pressure butterfly valve (26), the steam drain of second turbine low pressure cylinder (22) is connect with the second condenser (23), institute
The recirculated water side for stating the second condenser (23) passes through second circulation water supplying pipe (203) and second circulation return pipe (204) and second
Cooling tower (24) connection, and No. five circulation valves are sequentially installed with along water flowing direction on second circulation water supplying pipe (203)
(216) and No. six circulation valves (217) No. eight, are sequentially installed with along water flowing direction on second circulation return pipe (204)
Circulation valve (219) and No. seven circulation valves (218), the steam drain of second Steam Turbine Through IP Admission (21) also pass through second and adopt
Warm extraction steam pipe (202) are connect with the second heat exchangers for district heating (25), and are equipped with the second heat supply network on the second heating extraction steam pipe (202)
Valve (27)；
The first circulation water supplying pipe (103) is connect by circulating water supply bypass (7) with second circulation water supplying pipe (203), and
It is equipped with water supply bypass valve (9) in circulating water supply bypass (7), the first circulation return pipe (104) passes through by circulating backwater
Road (8) is connect with second circulation return pipe (204), and is equipped with return water bypass valve (10) in circulating backwater bypass (8)；
The cooling steam system includes reducing-and-cooling plant (1) and water separator (2), the reducing-and-cooling plant (1)
Air intake connect with the venthole of cooling steam general pipeline (5), and on cooling steam general pipeline (5) along steam flow direction according to
Secondary to be equipped with temperature summary table (3) and pressure summary table (4), the air intake and the first cooling steam of the cooling steam general pipeline (5) are total
Manage the venthole connection of (106), the air intake of the first cooling steam general pipeline (106) and the first Steam Turbine Through IP Admission (11)
Steam drain connection, and first cooling total valve (120), the pressure and temperature reducing are installed on the first cooling steam general pipeline (106)
The venthole of device (1) is connect with the air intake of water separator (2), and the venthole of the water separator (2) passes through
First cooling steam pipe (105) and the second cooling steam pipe (205) respectively with the air intake of the first turbine low pressure cylinder (12) and
The air intake of second turbine low pressure cylinder (22) connects, and on the first cooling steam pipe (105) along steam flow direction according to
It is secondary that first coolant valve (115), first flow instrument (114), first pressure gauge (113), the first thermometer (112) and are installed
One gate valve (111) is sequentially installed with the second coolant valve along steam flow direction on the second cooling steam pipe (205)
(215), second flow instrument (214), second pressure gauge (213), second temperature table (212) and the second gate valve (211).
2. two units according to claim 1 that are used for coagulate pumping back heating system in combination, which is characterized in that the cooling steaming
The air intake of vapour general pipeline (5) is also connect with the venthole of the second cooling steam general pipeline (206), the second cooling steam general pipeline
(206) air intake is connect with the steam drain of the second Steam Turbine Through IP Admission (21), and is pacified on the second cooling steam general pipeline (206)
Equipped with second cooling total valve (220).
3. two units according to claim 1 that are used for coagulate pumping back heating system in combination, which is characterized in that the circulation supplies
One end of water bypass (7) is connected between No.1 circulation valve (116) and No. two circulation valves (117), by the circulating water supply
The other end on road (7) is connected between No. five circulation valves (216) and No. six circulation valves (217).
4. two units according to claim 1 that are used for coagulate pumping back heating system in combination, which is characterized in that described to be recycled back to
One end of water bypass (8) is connected between No. three circulation valves (118) and No. four circulation valves (119), by the circulating backwater
The other end on road (8) is connected between No. seven circulation valves (218) and No. eight circulation valves (219).
5. two units according to claim 1 that are used for coagulate pumping back heating system in combination, which is characterized in that first liquid
It presses butterfly valve (16) and the second hydraulic pressure butterfly valve (26) is the valve without mechanical position limitation, the fluid No leakage when valve closes entirely.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821810071.8U CN209212321U (en) | 2018-11-05 | 2018-11-05 | One kind is coagulated in combination for two units takes out back heating system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595226A (en) * | 2019-10-21 | 2019-12-20 | 德阳东汽电站机械制造有限公司 | Half-side self-adaptive high-back-pressure condenser system and operation method thereof |
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2018
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595226A (en) * | 2019-10-21 | 2019-12-20 | 德阳东汽电站机械制造有限公司 | Half-side self-adaptive high-back-pressure condenser system and operation method thereof |
| CN110595226B (en) * | 2019-10-21 | 2023-11-24 | 德阳东汽电站机械制造有限公司 | Semi-side self-adaptive high-backpressure condenser system and operation method thereof |
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