CN105805806B - A kind of hot pressing unit heating system based on large-scale air cooling unit and control method thereof - Google Patents
A kind of hot pressing unit heating system based on large-scale air cooling unit and control method thereof Download PDFInfo
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- CN105805806B CN105805806B CN201610242074.5A CN201610242074A CN105805806B CN 105805806 B CN105805806 B CN 105805806B CN 201610242074 A CN201610242074 A CN 201610242074A CN 105805806 B CN105805806 B CN 105805806B
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- 238000007731 hot pressing Methods 0.000 title claims abstract description 117
- 238000010438 heat treatment Methods 0.000 title claims abstract description 104
- 238000000034 method Methods 0.000 title claims abstract description 37
- 238000001816 cooling Methods 0.000 title claims description 15
- 238000013461 design Methods 0.000 claims abstract description 6
- 239000007789 gas Substances 0.000 claims description 238
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 107
- 230000001105 regulatory effect Effects 0.000 claims description 85
- 239000008400 supply water Substances 0.000 claims description 21
- 230000002209 hydrophobic effect Effects 0.000 claims description 11
- 238000010977 unit operation Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 230000003750 conditioning effect Effects 0.000 claims description 3
- 238000011084 recovery Methods 0.000 claims description 3
- 239000002918 waste heat Substances 0.000 claims description 3
- 239000008236 heating water Substances 0.000 claims 1
- 230000000149 penetrating effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010304 firing Methods 0.000 abstract 1
- 238000004134 energy conservation Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000004320 controlled atmosphere Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 description 1
- 240000002853 Nelumbo nucifera Species 0.000 description 1
- 235000006510 Nelumbo pentapetala Nutrition 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
- F24D1/04—Steam central heating systems operating with exhaust steam
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D1/00—Steam central heating systems
- F24D1/08—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
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- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Steam Or Hot-Water Central Heating Systems (AREA)
Abstract
The present invention provides a kind of novel heat supply design scheme and system, this system comprises adjustable hot pressing unit, heat supply network heat exchanger, condensing heat exchanger and the valve of connection relevant apparatus thereof and accessory, Center for architecture content is the plural serial stage heating system of high back pressure+adjustable hot pressing unit+spike heating, different firing equipments can be put into, to ensure the whole controllability for hot season interior-heat net system and high efficiency according to the heat demand under different operating modes.This overlaps technological process flexible adjustment, not by heat supplying scale and big machine load quantitative limitation, and by the utilization of exhaust steam serves the effect of energy-saving and emission-reduction.
Description
Technical field
The present invention relates to hot press heating system and control method thereof, especially relate to hot pressing based on large-scale air cooling unit
Unit heating system and control method thereof
Background technology
Heating system is the important infrastructure of urban construction, and the current heat-supplying mode of China with central heating is mainly
Main, and commonly used form has thermoelectricity co-generating heat supplying and district boiler room heat supply, the proposition required along with energy-saving and emission-reduction and ring
The reinforcement day by day of border protection conception, cogeneration of heat and power has become development trend currently mainly.
The Chinese patent of Application No. 201110369426.0 discloses the heat supply of a kind of pure condensate units cogeneration of heat and power
System reform method, it is characterised in that in utilization, row draws gas or the high heating heat supply network recirculated water that draws gas of arranging is to meet heat demand,
But what this system utilized is high-grade steam, has certain inferior position at energy-conservation aspect；
The Chinese patent of Application No. 201210575838.4 discloses a kind of Air-cooled Unit low potential energy stepped mixing heat supply
System, its main flow is that first heat supply network recirculated water heated by exhaust steam in low-temperature heat source heater, reclaims low-grade energy, then
Deliver to high temperature heat source heater again and absorb the high-order heat of intermediate pressure cylinder steam discharge, be warmed up to heat supply network recirculated water meet wanting of thermic load
Asking, although this scheme takes full advantage of exhaust steam heat, but its limiting factor is the most on the high side, and one is to need large-scale heat supply to bear
Lotus, when heat supplying scale is little, it can not play energy-conservation effect；Two is to need main frame to ensure certain rate of load condensate.
To sum up, prior art has the disadvantage that 1, middle row draws gas, high row draws gas, and utilize is high-grade steam,
Energy-conservation aspect has certain inferior position.2, high back pressure heat supply needs large-scale heating demand, and needs the rate of load condensate of unit
Certain requirement, limiting factor is the most.
Summary of the invention
The invention provides a kind of hot pressing unit heating system based on large-scale air cooling unit and control method thereof, overcome
The drawbacks described above of prior art.
According to the control method of a kind of hot pressing unit heating system based on large-scale air cooling unit of the present invention, described
Hot pressing unit comprises multi-stage vacuum hot pressing unit (1), and the first order coagulates gas heat exchanger A (6), and gas heat exchanger B (7,8) is coagulated in the second level,
Heat exchangers for district heating (9) and the connection vapour of relevant apparatus, water lines and valve, wherein valve mainly has: exhaust steam pipeline first is adjusted
Joint valve (10), exhaust steam pipeline second regulates valve (11), and steam control valve (12), second level hot press are entered in first order hot pressing unit exhaust steam
Steam control valve (13) is entered in group exhaust steam, and the first order is coagulated gas heat exchanger and entered steam control valve (14), and gas heat exchanger B1 side exhaust steam is coagulated in the second level
Entering steam control valve (15), the second level is coagulated gas heat exchanger B2 side exhaust steam and is entered steam control valve (16), and the second level is coagulated gas heat exchanger B2 side and taken out
Vapour enters steam control valve (17), and the second level is coagulated gas heat exchanger B1 side and drawn gas into steam control valve (18), and middle row draws gas the first regulation valve
(19), middle row draws gas the second regulation valve (20), heat exchangers for district heating air inlet adjustment valve (21), and the first order coagulates the water inlet regulation of gas heat exchanger
Valve (22), the first order coagulates gas heat exchanger and goes out water regulating valve (23), and the second level is coagulated gas heat exchanger and gone out water regulating valve (24), and heat supply network heats
Device goes out water regulating valve (25), and gas heat exchanger drain regulating valve (26) is coagulated in the second level, and the regulation of gas heat exchanger drain by-pass is coagulated in the second level
Valve (27), the first order coagulates gas heat exchanger drain regulating valve (28), and gas heat exchanger inlet regulating valve (29) is coagulated in the second level, and the second level is coagulated
Gas heat exchanger water side bypass valve (30), heat exchangers for district heating drain regulating valve (31).Three grades of heat exchangers for district heatings use series connection to close
System, by the different modes that puts into operation to ensure heat demand under different thermic loads require；
Wherein, the first order is coagulated gas heat exchanger and can be used double-flow or multipaths heat exchanger；The second level is coagulated gas heat exchanger and is adopted
By single process, and vapour side cavity is divided into two-stage B1, B2, two the most corresponding different hot pressing units of chambers；
Described control method is divided into the three below stage:
(1) in the first latter stage of heat supply, owing to thermic load rate is on the low side, vacuum hotpressing unit does not comes into operation, and relies solely on big
Machine exhaust steam heating heat supply network recirculated water carries out heat supply.In accompanying drawing 1, open that exhaust steam pipeline second regulates valve (11), the first order coagulates gas
Heat exchanger enters steam control valve (14), the second level coagulates that steam control valve (15) is entered in gas heat exchanger B1 side exhaust steam, gas heat exchanger is coagulated in the second level
Steam control valve (16) is entered in the exhaust steam of B2 side, and exhaust steam simultaneously enters first order condensing heat exchanger A and gas heat exchanger B is coagulated in the second level, heat
Net recirculated water side open the first order coagulate gas heat exchanger inlet regulating valve (22), the second level coagulate gas heat exchanger go out water regulating valve (24),
Heat exchangers for district heating goes out water regulating valve (25), gas heat exchanger inlet regulating valve (29) is coagulated in the second level, gas heat exchanger water side is coagulated in the second level
Bypass valve (30), the closedown first order is coagulated gas heat exchanger and is gone out water regulating valve (23), makes heat supply network recirculated water enter at A condensing heat exchanger
Mouth side is divided into two-way, and a road enters A condensing heat exchanger, a road enters B and coagulates gas heat exchanger, and the two-way recirculated water after heat exchange coagulates at B
Gas heat exchanger exit is sent to heat user after converging, and during this period, big machine back pressure can make the appropriate adjustments, to meet heat demand；
(2) when entering time cold after date, due to the restriction of big machine back pressure, rely solely on exhaust steam and can not meet heat demand, need
Vacuum hotpressing unit to be put into, vacuum hotpressing unit uses adjustable two-stage series connection, and its investing method is as follows:
When exhaust steam heat supply can not meet require time, first put into first order hot pressing unit, open corresponding valve, including
Steam control valve (12) is entered in first order hot pressing unit exhaust steam, the second level is coagulated gas heat exchanger B1 side and drawn gas into steam control valve (18), middle row
Draw gas the first regulation valve (19), middle row draws gas the second regulation valve (20), closes the second level and coagulates gas heat exchanger B1 side exhaust steam and enter vapour and adjust
Joint valve (15), the second level are coagulated gas heat exchanger B2 side exhaust steam and are entered steam control valve (16), and hot pressing unit power steam takes from intermediate pressure cylinder row
Vapour, the mixed vapour entrance B1 after injection exhaust steam coagulates gas heat exchanger to carry out heating heat supply network recirculated water, and the first order is opened in recirculated water side
Solidifying gas heat exchanger goes out water regulating valve (23), and gas heat exchanger inlet regulating valve (29) is coagulated in the second level, gas heat exchanger is coagulated in the second level in closedown
Water side bypass valve (30), it is ensured that recirculated water first passes through A and coagulates gas heat exchanger and enter back into B1 after exhaust steam heat exchange and coagulate gas heat exchanger
Heat exchange；When thermic load continues to increase, needing to put into second level hot pressing unit, the second level hot pressing unit exhaust steam opening correspondence is entered
Steam control valve (13), the second level coagulate gas heat exchanger B2 side and draw gas into steam control valve (17), during this grade of hot press power steam is taken from
Cylinder pressure steam discharge, the mixed vapour after injection exhaust steam enters B2 and coagulates gas heat exchanger heating heat supply network recirculated water.
(3) when entering freeze-up, when the exhaust steam of input and fully loaded vacuum hotpressing unit still can not reach heat demand,
Need to put into heat exchangers for district heating and heat heat supply network recirculated water further to reach heat demand, open lateral steam tube road heat exchangers for district heating and enter
Controlled atmosphere joint valve (21), intermediate pressure cylinder steam discharge enters heat exchangers for district heating heating heat supply network recirculated water.
According to the control method of hot pressing unit heating system based on large-scale air cooling unit of the present invention, wherein in fortune
During row draining system, when when relying solely on exhaust steam heat supply first latter stage, hydrophobic side is opened the second level and coagulated gas heat exchanger drain by-pass
Regulating valve (27), the first order coagulates gas heat exchanger drain regulating valve (28), closes the second level and coagulates gas heat exchanger drain regulating valve (26),
The hydrophobic of A, B condensing heat exchanger is discharged into hot well；When in freeze-up or secondary cold phase, hot pressing unit or heat supply network heat exchanger put into and make
With rear, open the second level and coagulate gas heat exchanger drain regulating valve (26), heat exchangers for district heating drain regulating valve (31), close the second level and coagulate
Gas heat exchanger drain by-pass regulation valve (27), second level condensing heat exchanger and the hydrophobic entrance A condensing heat exchange of heat supply network heat exchanger
Hot well it is discharged into again after the further recovery waste heat of device.
According to the control method of hot pressing unit heating system based on large-scale air cooling unit of the present invention, wherein said
Two levels of thermal press group is combined by fixed and adjustable hot press respectively so that it is has and regulates performance more flexibly, adjusts
Pitch curve is divided into from 0 to 0 ' multiple line segments, it is as follows that the most each curved section represents meaning:
0 point: heat supply starting point；
0-b section: initial stage exhaust steam heat supply (thermic load gradually rises)；
C point: first order hot pressing unit puts into operation a little；
B-c section: owing to supply water temperature brings up to TA, circulating water flow bust；
C-d section: first order hot pressing unit puts into operation and adjustment curve (load is gradually increased)；
E point: second level hot pressing unit starts to put into operation a little；
D-e section: owing to supply water temperature brings up to TB, circulating water flow bust；
E-f section: second level hot pressing unit puts into operation and adjustment curve (load is gradually increased)；
F point: heat exchangers for district heating puts into operation a little；
F-g section: heat exchangers for district heating is gradually increased load；
G-f ' section: heat exchangers for district heating is gradually lowered load；
F ' point: heat exchangers for district heating point out of service；
F '-e ' section: second level hot pressing unit operation and adjustment curve (load is gradually lowered)；
E ' point: second level hot pressing unit point out of service；
E '-d ' section: owing to supply water temperature is reduced to TA by TB, circulating water flow has one to uprush；
D '-c ' section: first order hot pressing unit operation and adjustment curve (load is gradually lowered)；
C ' point: first order hot pressing unit point out of service；
C '-b ' section: owing to supply water temperature reduces, circulating water flow has one to uprush；
B '-0 ' section: exhaust steam is for thermal conditioning section (load is gradually lowered)；
0 ' point: unit exits heat supply running point；
In sum, flow adjustment curve equation is:
In formula: QnDesign heating load, W；tnHeat supply indoor calculating temperature, DEG C；twCertain day outdoor actual temperature, DEG C；
twHeat supply outdoor calculating temperature, DEG C；T'aThe supply water temperature that different exhaust steam back pressures are corresponding, DEG C；thHeat supply network return water temperature,
℃；C specific heat of water holds, J/ (kg. DEG C), TAFirst order hot pressing unit put into operation after supply water temperature, in formula: TBThe second level
Hot pressing unit put into operation after supply water temperature, DEG C.
Present invention also offers the hot pressing unit heat supply of a kind of control method implementing above-mentioned hot pressing unit heating system
System, described hot press group system includes: two-stage vacuum hot pressing unit (1), and the first order coagulates gas heat exchanger A (6), and gas is coagulated in the second level
Heat exchanger B (7,8), heat exchangers for district heating (9) and the connection vapour of relevant apparatus, water lines and valve, wherein valve mainly has: weary
Vapor pipeline first regulates valve (10), and exhaust steam pipeline second regulates valve (11), and steam control valve (12) is entered in first order hot pressing unit exhaust steam,
Steam control valve (13) is entered in hot pressing unit exhaust steam in the second level, and the first order is coagulated gas heat exchanger and entered steam control valve (14), and the second level is coagulated gas and changed
Steam control valve (15) is entered in hot device B1 side exhaust steam, and the second level is coagulated gas heat exchanger B2 side exhaust steam and entered steam control valve (16), and gas is coagulated in the second level
Heat exchanger B2 draws gas side into steam control valve (17), and the second level is coagulated gas heat exchanger B1 side and drawn gas into steam control valve (18), and middle row draws gas
First regulation valve (19), middle row draws gas the second regulation valve (20), and heat exchangers for district heating air inlet adjustment valve (21), the first order coagulates gas heat exchange
Device inlet regulating valve (22), the first order coagulates gas heat exchanger and goes out water regulating valve (23), and the second level is coagulated gas heat exchanger and gone out water regulating valve
(24), heat exchangers for district heating goes out water regulating valve (25), and gas heat exchanger drain regulating valve (26) is coagulated in the second level, and gas heat exchanger is coagulated in the second level
Drain by-pass regulates valve (27), and the first order coagulates gas heat exchanger drain regulating valve (28), and gas heat exchanger inlet regulating valve is coagulated in the second level
(29), coagulate gas heat exchanger water side bypass valve (30) in the second level, heat exchangers for district heating drain regulating valve (31).Three grades of heat supply network heating
Device uses series relationship, by the different modes that puts into operation to ensure heat demand under different thermic loads require；
Wherein, the first order is coagulated gas heat exchanger and can be used double-flow or multipaths heat exchanger；The second level is coagulated gas heat exchanger and is adopted
By single process, and vapour side cavity is divided into two-stage B1, B2, two the most corresponding different hot pressing units of chambers.
Present invention also offers the hot pressing unit heat supply of a kind of control method implementing above-mentioned hot pressing unit heating system
System, the form of the plural serial stage more than two-stage that wherein employing of vacuum hotpressing unit is adjustable.
Hot pressing unit heating system based on large-scale air cooling unit according to the present invention and control method thereof, it is relative to existing
For having technology, it is possible to fully use exhaust steam heat supply, improve low-grade energy ground utilization rate, play the effect of energy-saving and emission-reduction, simultaneously
Possess the function of flexible, do not limited by heat supplying scale and main unit load.Have an advantage in that:
1, compare row's extraction for heat supply in relatively and there is more energy-conservation effect.
2, compare high back pressure heat supply, its flexible adjustment, is not limited by area of heat-supply service and big machine load.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the present invention is further described, wherein:
Fig. 1: the schematic diagram of hot pressing unit heating system based on large-scale air cooling unit；
Fig. 2: the heat supply different times of hot pressing unit heating system based on large-scale air cooling unit and heat supply network quantity of circulating water, heat
The curve relation figure of press leaving water temperature.
In figure:
1-Multi-stage heat press group；
2-high pressure cylinder；
3-intermediate pressure cylinder；
4-low pressure (LP) cylinder；
5-Air-Cooling Island；
6-A condensing heat exchanger；
The B1 end of 7-B condensing heat exchanger；
The B2 end of 8-B condensing heat exchanger；
9-heat supply network heat exchanger；
10-exhaust steam pipeline first regulates valve；
11-exhaust steam pipeline second regulates valve；
Steam control valve is entered in 12-first order hot pressing unit exhaust steam；
Steam control valve is entered in hot pressing unit exhaust steam in the 13-second level；
The 14-first order is coagulated gas heat exchanger and is entered steam control valve；
15-coagulates the second level gas heat exchanger B1 side exhaust steam and enters steam control valve；
16-coagulates the second level gas heat exchanger B2 side exhaust steam and enters steam control valve；
17-coagulates the second level gas heat exchanger B2 side and draws gas into steam control valve；
18-coagulates the second level gas heat exchanger B1 side and draws gas into steam control valve；
19-arranges the first regulation valve that draws gas；
20-arranges the second regulation valve that draws gas；
21-heat exchangers for district heating air inlet adjustment valve；
The 22-first order coagulates gas heat exchanger inlet regulating valve；
The 23-first order is coagulated gas heat exchanger and is gone out water regulating valve；
24-coagulates the second level gas heat exchanger and goes out water regulating valve；
25-heat exchangers for district heating goes out water regulating valve；
26-coagulates the second level gas heat exchanger drain regulating valve；
27-coagulates the second level gas heat exchanger drain by-pass regulation valve；
The 28-first order coagulates gas heat exchanger drain regulating valve；
29-coagulates the second level gas heat exchanger inlet regulating valve；
30-coagulates the second level gas heat exchanger water side bypass valve；
31-heat exchangers for district heating drain regulating valve.
Detailed description of the invention
The present invention provides a kind of novel heat supply design scheme and system, and this system comprises adjustable hot pressing unit, heat supply network
Heat exchanger, condensing heat exchanger and the valve of connection relevant apparatus thereof and accessory, Center for architecture content is high back pressure+adjustable hot pressing
The plural serial stage heating system of unit+spike heating, can put into different heating according to the heat demand under different operating modes and set
Standby, to ensure the whole controllability for hot season interior-heat net system and high efficiency.This overlaps technological process flexible adjustment, not by heat supply
Scale and big machine load quantitative limitation, and by the utilization of exhaust steam being served the effect of energy-saving and emission-reduction.
With reference to Fig. 1 and 2, this scheme has invented a kind of novel heat supply design scheme, scheme main contents comprise multistage very
Empty hot pressing unit (1), the first order coagulates gas heat exchanger A (6), and coagulate gas heat exchanger B (7,8) in the second level, heat exchangers for district heating (9) and even
Connecing the vapour of relevant apparatus, water lines and valve, wherein valve mainly has: exhaust steam pipeline first regulates valve (10), exhaust steam pipeline
Two regulate valve (11), and steam control valve (12) is entered in first order hot pressing unit exhaust steam, and steam control valve is entered in hot pressing unit exhaust steam in the second level
(13), the first order is coagulated gas heat exchanger and is entered steam control valve (14), and the second level is coagulated gas heat exchanger B1 side exhaust steam and entered steam control valve (15), the
Steam control valve (16) is entered in two grades of solidifying gas heat exchanger B2 side exhaust steam, and the second level is coagulated gas heat exchanger B2 side and drawn gas into steam control valve (17),
The second level is coagulated gas heat exchanger B1 side and is drawn gas into steam control valve (18), and middle row draws gas the first regulation valve (19), and middle row draws gas the second tune
Saving valve (20), heat exchangers for district heating air inlet adjustment valve (21), the first order coagulates gas heat exchanger inlet regulating valve (22), and the first order is coagulated gas and changed
Hot device goes out water regulating valve (23), and the second level is coagulated gas heat exchanger and gone out water regulating valve (24), and heat exchangers for district heating goes out water regulating valve (25), the
Two grades of solidifying gas heat exchanger drain regulating valve (26), the second level coagulate gas heat exchanger drain by-pass regulation valve (27), the first order is coagulated gas and is changed
Hot device drain regulating valve (28), the second level coagulates gas heat exchanger inlet regulating valve (29), and the second level is coagulated the bypass of gas heat exchanger water side and adjusted
Joint valve (30), heat exchangers for district heating drain regulating valve (31).Three grades of heat exchangers for district heatings use series relationship, in different thermic load requirements
Under by the different modes that puts into operation to ensure heat demand.
The first order coagulates gas heat exchanger can use double-flow or multipaths heat exchanger, to ensure sufficient heat transfer effect；The
Two grades of solidifying gas heat exchangers use single process, and vapour side cavity is divided into two-stage B1, B2, two the most corresponding different hot presses of chamber
Group, to play the purpose of series connection heating, has the ability of flexible simultaneously.
This cover system technological process is divided into the three below stage:
(1) in the first latter stage of heat supply, owing to thermic load rate is on the low side, vacuum hotpressing unit does not comes into operation, and relies solely on big
Machine exhaust steam heating heat supply network recirculated water carries out heat supply.In accompanying drawing 1, open that exhaust steam pipeline second regulates valve (11), the first order coagulates gas
Heat exchanger enters steam control valve (14), the second level coagulates that steam control valve (15) is entered in gas heat exchanger B1 side exhaust steam, gas heat exchanger is coagulated in the second level
Steam control valve (16) is entered in the exhaust steam of B2 side, and exhaust steam simultaneously enters first order condensing heat exchanger A and gas heat exchanger B is coagulated in the second level, heat
Net recirculated water side open the first order coagulate gas heat exchanger inlet regulating valve (22), the second level coagulate gas heat exchanger go out water regulating valve (24),
Heat exchangers for district heating goes out water regulating valve (25), gas heat exchanger inlet regulating valve (29) is coagulated in the second level, gas heat exchanger water side is coagulated in the second level
Bypass valve (30), the closedown first order is coagulated gas heat exchanger and is gone out water regulating valve (23), makes heat supply network recirculated water enter at A condensing heat exchanger
Mouth side is divided into two-way, and a road enters A condensing heat exchanger, a road enters B and coagulates gas heat exchanger, and the two-way recirculated water after heat exchange coagulates at B
Gas heat exchanger exit is sent to heat user after converging, and during this period, big machine back pressure can make the appropriate adjustments, to meet heat demand；
(2) when entering time cold after date, due to the restriction of big machine back pressure, rely solely on exhaust steam and can not meet heat demand, need
Vacuum hotpressing unit to be put into, vacuum hotpressing unit uses adjustable plural serial stage, with the two-stage series connection hot press in accompanying drawing 1
As a example by group, its investing method is as follows:
When exhaust steam heat supply can not meet require time, first put into first order hot pressing unit, open corresponding valve, including
Steam control valve (12) is entered in first order hot pressing unit exhaust steam, the second level is coagulated gas heat exchanger B1 side and drawn gas into steam control valve (18), middle row
Draw gas the first regulation valve (19), middle row draws gas the second regulation valve (20), closes the second level and coagulates gas heat exchanger B1 side exhaust steam and enter vapour and adjust
Joint valve (15), the second level are coagulated gas heat exchanger B2 side exhaust steam and are entered steam control valve (16), and hot pressing unit power steam takes from intermediate pressure cylinder row
Vapour, the mixed vapour entrance B1 after injection exhaust steam coagulates gas heat exchanger to carry out heating heat supply network recirculated water, and the first order is opened in recirculated water side
Solidifying gas heat exchanger goes out water regulating valve (23), and gas heat exchanger inlet regulating valve (29) is coagulated in the second level, gas heat exchanger is coagulated in the second level in closedown
Water side bypass valve (30), it is ensured that recirculated water first passes through A and coagulates gas heat exchanger and enter back into B1 after exhaust steam heat exchange and coagulate gas heat exchanger
Heat exchange；When thermic load continues to increase, needing to put into second level hot pressing unit, the second level hot pressing unit exhaust steam opening correspondence is entered
Steam control valve (13), the second level coagulate gas heat exchanger B2 side and draw gas into steam control valve (17), during this grade of hot press power steam is taken from
Cylinder pressure steam discharge, the mixed vapour after injection exhaust steam enters B2 and coagulates gas heat exchanger heating heat supply network recirculated water.
(3) when entering freeze-up, when the exhaust steam of input and fully loaded vacuum hotpressing unit still can not reach heat demand,
Need to put into heat exchangers for district heating and heat heat supply network recirculated water further to reach heat demand, open lateral steam tube road heat exchangers for district heating and enter
Controlled atmosphere joint valve (21), intermediate pressure cylinder steam discharge enters heat exchangers for district heating heating heat supply network recirculated water.
The draining system method of operation, when when relying solely on exhaust steam heat supply first latter stage, the hydrophobic side unlatching second level is coagulated gas and changed
Hot device drain by-pass regulates valve (27), and the first order coagulates gas heat exchanger drain regulating valve (28), and the closedown second level is coagulated gas heat exchanger and dredged
Water regulating valve (26), the hydrophobic of A, B condensing heat exchanger is discharged into hot well；When in freeze-up or secondary cold phase, hot pressing unit or heat
After net heat exchanger comes into operation, open the second level and coagulate gas heat exchanger drain regulating valve (26), heat exchangers for district heating drain regulating valve
(31), close the second level and coagulate gas heat exchanger drain by-pass regulation valve (27), second level condensing heat exchanger and heat supply network heat exchanger
Hot well it is discharged into again after the hydrophobic entrance further recovery waste heat of A condensing heat exchanger.
Two levels of thermal press group is combined by fixed and adjustable hot press respectively so that it is has and regulates more flexibly
Performance, adjustment curve is as shown in accompanying drawing two, and it is as follows that each curved section represents meaning:
0 point: heat supply starting point；
0-b section: initial stage exhaust steam heat supply (thermic load gradually rises)；
C point: first order hot pressing unit puts into operation a little；
B-c section: owing to supply water temperature brings up to TA, circulating water flow bust；
C-d section: first order hot pressing unit puts into operation and adjustment curve (load is gradually increased)；
E point: second level hot pressing unit starts to put into operation a little；
D-e section: owing to supply water temperature brings up to TB, circulating water flow bust；
E-f section: second level hot pressing unit puts into operation and adjustment curve (load is gradually increased)；
F point: heat exchangers for district heating puts into operation a little；
F-g section: heat exchangers for district heating is gradually increased load；
G-f ' section: heat exchangers for district heating is gradually lowered load；
F ' point: heat exchangers for district heating point out of service；
F '-e ' section: second level hot pressing unit operation and adjustment curve (load is gradually lowered)；
E ' point: second level hot pressing unit point out of service；
E '-d ' section: owing to supply water temperature is reduced to TA by TB, circulating water flow has one to uprush；
D '-c ' section: first order hot pressing unit operation and adjustment curve (load is gradually lowered)；
C ' point: first order hot pressing unit point out of service；
C '-b ' section: owing to supply water temperature reduces, circulating water flow has one to uprush；
B '-0 ' section: exhaust steam is for thermal conditioning section (load is gradually lowered)；
0 ' point: unit exits heat supply running point；
In sum, flow adjustment curve equation is:
In formula: QnDesign heating load, W；tnHeat supply indoor calculating temperature, DEG C；twCertain day outdoor actual temperature, DEG C；
t'wHeat supply outdoor calculating temperature, DEG C；T'aThe supply water temperature that different exhaust steam back pressures are corresponding, DEG C；thHeat supply network return water temperature,
℃；C specific heat of water holds, J/ (kg. DEG C), TAFirst order hot pressing unit put into operation after supply water temperature, in formula: TBThe second level
Hot pressing unit put into operation after supply water temperature, DEG C.
Present invention also offers the hot pressing unit heat supply system of a kind of control method implementing above-mentioned hot pressing unit heating system
System, described hot press group system includes: two-stage vacuum hot pressing unit (1), and the first order coagulates gas heat exchanger A (6), and the second level is coagulated gas and changed
Hot device B (7,8), heat exchangers for district heating (9) and the connection vapour of relevant apparatus, water lines and valve, wherein valve mainly has: exhaust steam
Pipeline first regulates valve (10), and exhaust steam pipeline second regulates valve (11), and steam control valve (12) is entered in first order hot pressing unit exhaust steam, the
Steam control valve (13) is entered in two grades of hot pressing unit exhaust steam, and the first order is coagulated gas heat exchanger and entered steam control valve (14), and gas heat exchange is coagulated in the second level
Steam control valve (15) is entered in device B1 side exhaust steam, and the second level is coagulated gas heat exchanger B2 side exhaust steam and entered steam control valve (16), and the second level is coagulated gas and changed
Hot device B2 side is drawn gas into steam control valve (17), and the second level is coagulated gas heat exchanger B1 side and drawn gas into steam control valve (18), and middle row draws gas
One regulation valve (19), middle row draws gas the second regulation valve (20), and heat exchangers for district heating air inlet adjustment valve (21), the first order coagulates gas heat exchanger
Inlet regulating valve (22), the first order coagulates gas heat exchanger and goes out water regulating valve (23), and the second level is coagulated gas heat exchanger and gone out water regulating valve (24),
Heat exchangers for district heating goes out water regulating valve (25), and gas heat exchanger drain regulating valve (26) is coagulated in the second level, and it is hydrophobic that gas heat exchanger is coagulated in the second level
Bypass valve (27), the first order coagulates gas heat exchanger drain regulating valve (28), and gas heat exchanger inlet regulating valve (29) is coagulated in the second level,
Coagulate gas heat exchanger water side bypass valve (30) in the second level, heat exchangers for district heating drain regulating valve (31).Three grades of heat exchangers for district heatings are adopted
By series relationship, by the different modes that puts into operation to ensure heat demand under different thermic loads require；
Wherein, the first order is coagulated gas heat exchanger and can be used double-flow or multipaths heat exchanger；The second level is coagulated gas heat exchanger and is adopted
By single process, and vapour side cavity is divided into two-stage B1, B2, two the most corresponding different hot pressing units of chambers.
Present invention also offers the hot pressing unit heat supply system of a kind of control method implementing above-mentioned hot pressing unit heating system
System, the form of the plural serial stage more than two-stage that wherein employing of vacuum hotpressing unit is adjustable.
The present invention improves heating system flow process and regulation scheme, it is achieved that double-flow and single process coagulate gas heat exchanger package
The switching being combined under different operating mode uses.
Hot pressing unit heating system based on large-scale air cooling unit according to the present invention and control method thereof, it is relative to existing
For having technology, it is possible to fully use exhaust steam heat supply, improve low-grade energy ground utilization rate, play the effect of energy-saving and emission-reduction, simultaneously
Possess the function of flexible, do not limited by heat supplying scale and main unit load.Have an advantage in that:
1, compare row's extraction for heat supply in relatively and there is more energy-conservation effect.
2, compare high back pressure heat supply, its flexible adjustment, is not limited by area of heat-supply service and big machine load.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.Protection scope of the present invention is defined by the claims.
Claims (5)
1. a control method for hot pressing unit heating system based on large-scale air cooling unit, described hot pressing unit comprise multistage very
Empty hot pressing unit (1), the first order coagulates gas heat exchanger A (6), and coagulate gas heat exchanger B (7,8) in the second level, heat exchangers for district heating (9) and even
Connecing the vapour of relevant apparatus, water lines and valve, wherein valve mainly has: exhaust steam pipeline first regulates valve (10), exhaust steam pipeline
Two regulate valve (11), and steam control valve (12) is entered in first order hot pressing unit exhaust steam, and steam control valve is entered in hot pressing unit exhaust steam in the second level
(13), the first order is coagulated gas heat exchanger and is entered steam control valve (14), and the second level is coagulated gas heat exchanger B1 side exhaust steam and entered steam control valve (15), the
Steam control valve (16) is entered in two grades of solidifying gas heat exchanger B2 side exhaust steam, and the second level is coagulated gas heat exchanger B2 side and drawn gas into steam control valve (17),
The second level is coagulated gas heat exchanger B1 side and is drawn gas into steam control valve (18), and middle row draws gas the first regulation valve (19), and middle row draws gas the second tune
Saving valve (20), heat exchangers for district heating air inlet adjustment valve (21), the first order coagulates gas heat exchanger inlet regulating valve (22), and the first order is coagulated gas and changed
Hot device goes out water regulating valve (23), and the second level is coagulated gas heat exchanger and gone out water regulating valve (24), and heat exchangers for district heating goes out water regulating valve (25), the
Two grades of solidifying gas heat exchanger drain regulating valve (26), the second level coagulate gas heat exchanger drain by-pass regulation valve (27), the first order is coagulated gas and is changed
Hot device drain regulating valve (28), the second level coagulates gas heat exchanger inlet regulating valve (29), and the second level is coagulated the bypass of gas heat exchanger water side and adjusted
Joint valve (30), heat exchangers for district heating drain regulating valve (31), three grades of heat exchangers for district heatings use series relationship, in different thermic load requirements
Under by the different modes that puts into operation to ensure heat demand；
Wherein, the first order is coagulated gas heat exchanger and can be used double-flow or multipaths heat exchanger；The second level is coagulated gas heat exchanger and is used single
Flow process, and vapour side cavity is divided into two-stage B1, B2, two the most corresponding different hot pressing units of chambers；
Described control method is divided into the three below stage:
(1) in the first latter stage of heat supply, owing to thermic load rate is on the low side, vacuum hotpressing unit does not comes into operation, and relies solely on big machine weary
Vapour heating heat supply network recirculated water carry out heat supply, open exhaust steam pipeline second regulate valve (11), the first order coagulate gas heat exchanger enter vapour regulation
Valve (14), the second level coagulate gas heat exchanger B1 side exhaust steam enter steam control valve (15), the second level coagulate gas heat exchanger B2 side exhaust steam enter vapour adjust
Joint valve (16), exhaust steam simultaneously enters first order condensing heat exchanger A and gas heat exchanger B is coagulated in the second level, and heat supply network recirculated water side is opened
The first order coagulates gas heat exchanger inlet regulating valve (22), the second level is coagulated gas heat exchanger and gone out water regulating valve (24), heat exchangers for district heating water outlet
Regulate valve (25), gas heat exchanger inlet regulating valve (29) is coagulated in the second level, gas heat exchanger water side bypass valve (30) is coagulated in the second level,
The closedown first order is coagulated gas heat exchanger and is gone out water regulating valve (23), makes heat supply network recirculated water be divided into two-way at A condensing heat exchanger entrance side, and one
Road enters A condensing heat exchanger, a road enters B and coagulates gas heat exchanger, and the two-way recirculated water after heat exchange coagulates gas heat exchanger exit at B and converges
After be sent to heat user, during this period, big machine back pressure can make the appropriate adjustments, to meet heat demand；
(2) when entering time cold after date, due to the restriction of big machine back pressure, rely solely on exhaust steam and can not meet heat demand, need to throw
Entering vacuum hotpressing unit, vacuum hotpressing unit uses adjustable two-stage series connection, and its investing method is as follows:
When exhaust steam heat supply can not meet require time, first put into first order hot pressing unit, open corresponding valve, including first
Steam control valve (12) is entered in level hot pressing unit exhaust steam, the second level is coagulated gas heat exchanger B1 side and drawn gas and draw gas into steam control valve (18), middle row
First regulation valve (19), middle row draw gas the second regulation valve (20), close the second level and coagulate gas heat exchanger B1 side exhaust steam and enter steam control valve
(15), the second level coagulate gas heat exchanger B2 side exhaust steam and enter steam control valve (16), hot pressing unit power steam is taken from intermediate pressure cylinder steam discharge, is drawn
Penetrating the mixed vapour after exhaust steam to enter B1 and coagulate gas heat exchanger and carry out heating heat supply network recirculated water, recirculated water side is opened the first order and is coagulated gas and change
Hot device goes out water regulating valve (23), and gas heat exchanger inlet regulating valve (29) is coagulated in the second level, the second level is coagulated by gas heat exchanger water side in closedown
Road regulation valve (30), it is ensured that recirculated water first passes through A and coagulates gas heat exchanger and enter back into B1 after exhaust steam heat exchange and coagulate gas heat exchanger heat exchange；When
When thermic load continues to increase, needing to put into second level hot pressing unit, vapour regulation is entered in the second level hot pressing unit exhaust steam opening correspondence
Valve (13), the second level coagulate gas heat exchanger B2 side and draw gas into steam control valve (17), and this grade of hot press power steam takes from intermediate pressure cylinder row
Vapour, the mixed vapour after injection exhaust steam enters B2 and coagulates gas heat exchanger heating heat supply network recirculated water；
(3), when entering freeze-up, when the exhaust steam of input and fully loaded vacuum hotpressing unit still can not reach heat demand, need
Put into heat exchangers for district heating and heat heat supply network recirculated water further to reach heat demand, open the heat exchangers for district heating air inlet of lateral steam tube road and adjust
Joint valve (21), intermediate pressure cylinder steam discharge enters heat exchangers for district heating heating heat supply network recirculated water.
The control method of hot pressing unit heating system based on large-scale air cooling unit the most according to claim 1, Qi Zhong
When running the draining system method of operation, when when relying solely on exhaust steam heat supply first latter stage, hydrophobic side is opened the second level and coagulated gas heat exchange
Device drain by-pass regulates valve (27), and the first order coagulates gas heat exchanger drain regulating valve (28), and it is hydrophobic that gas heat exchanger is coagulated in the closedown second level
Regulation valve (26), the hydrophobic of A, B condensing heat exchanger is discharged into hot well；When at freeze-up or secondary cold phase, hot pressing unit or heat supply network
After heat exchanger comes into operation, open the second level and coagulate gas heat exchanger drain regulating valve (26), heat exchangers for district heating drain regulating valve (31),
Close the second level and coagulate gas heat exchanger drain by-pass regulation valve (27), second level condensing heat exchanger and heat supply network heat exchanger hydrophobic enter
Hot well it is discharged into again after entering the further recovery waste heat of A condensing heat exchanger.
The control method of hot pressing unit heating system based on large-scale air cooling unit the most according to claim 1 and 2, wherein
Described two levels of thermal press group is combined by fixed and adjustable hot press respectively so that it is have modulability more flexibly
Can, adjustment curve is divided into from 0 to 0 ' multiple line segments, it is as follows that the most each curved section represents meaning:
0 point: heat supply starting point；
0-b section: initial stage exhaust steam heat supply, thermic load gradually rises；
C point: first order hot pressing unit puts into operation a little；
B-c section: owing to supply water temperature brings up to TA, circulating water flow bust；
C-d section: first order hot pressing unit puts into operation and adjustment curve, and load is gradually increased；
E point: second level hot pressing unit starts to put into operation a little；
D-e section: owing to supply water temperature brings up to TB, circulating water flow bust；
E-f section: second level hot pressing unit puts into operation and adjustment curve, and load is gradually increased；
F point: heat exchangers for district heating puts into operation a little；
F-g section: heat exchangers for district heating is gradually increased load；
G-f ' section: heat exchangers for district heating is gradually lowered load；
F ' point: heat exchangers for district heating point out of service；
F '-e ' section: second level hot pressing unit operation and adjustment curve, load is gradually lowered；
E ' point: second level hot pressing unit point out of service；
E '-d ' section: owing to supply water temperature is reduced to TA by TB, circulating water flow has one to uprush；
D '-c ' section: first order hot pressing unit operation and adjustment curve, load is gradually lowered；
C ' point: first order hot pressing unit point out of service；
C '-b ' section: owing to supply water temperature reduces, circulating water flow has one to uprush；
B '-0 ' section: exhaust steam is for thermal conditioning section, and load is gradually lowered；
0 ' point: unit exits heat supply running point；
In sum, flow adjustment curve equation is:
In formula: QnDesign heating load, W；tnHeat supply indoor calculating temperature, DEG C；twCertain day outdoor actual temperature, DEG C；t'w—
Heat supply outdoor calculating temperature, DEG C；T′aThe supply water temperature that different exhaust steam back pressures are corresponding, DEG C；thHeat supply network return water temperature, DEG C；c—
Specific heat of water holds, J/ (kg. DEG C), TAFirst order hot pressing unit put into operation after supply water temperature, in formula: TBSecond level hot press
Group put into operation after supply water temperature, DEG C.
4. the hot pressing unit heat supply of the control method of the hot pressing unit heating system that a kind is implemented described in any one of claim 1-3
System, described hot press group system includes: two-stage vacuum hot pressing unit (1), and the first order coagulates gas heat exchanger A (6), and gas is coagulated in the second level
Heat exchanger B (7,8), heat exchangers for district heating (9) and the connection vapour of relevant apparatus, water lines and valve, wherein valve mainly has: weary
Vapor pipeline first regulates valve (10), and exhaust steam pipeline second regulates valve (11), and steam control valve is entered in first order hot pressing unit exhaust steam
(12), steam control valve (13) is entered in hot pressing unit exhaust steam in the second level, and the first order is coagulated gas heat exchanger and entered steam control valve (14), and the second level is coagulated
Steam control valve (15) is entered in gas heat exchanger B1 side exhaust steam, and the second level is coagulated gas heat exchanger B2 side exhaust steam and entered steam control valve (16), the second level
Solidifying gas heat exchanger B2 side is drawn gas into steam control valve (17), and the second level is coagulated gas heat exchanger B1 side and drawn gas into steam control valve (18), middle row
Draw gas the first regulation valve (19), and middle row draws gas the second regulation valve (20), and heat exchangers for district heating air inlet adjustment valve (21), the first order coagulates gas
Heat exchanger inlet regulating valve (22), the first order coagulates gas heat exchanger and goes out water regulating valve (23), and gas heat exchanger water outlet regulation is coagulated in the second level
Valve (24), heat exchangers for district heating goes out water regulating valve (25), and gas heat exchanger drain regulating valve (26) is coagulated in the second level, and gas heat exchange is coagulated in the second level
Device drain by-pass regulates valve (27), and the first order coagulates gas heat exchanger drain regulating valve (28), and the water inlet regulation of gas heat exchanger is coagulated in the second level
Valve (29), the second level coagulates gas heat exchanger water side bypass valve (30), heat exchangers for district heating drain regulating valve (31), and three grades of heat supply networks add
Hot device uses series relationship, by the different modes that puts into operation to ensure heat demand under different thermic loads require；
Wherein, the first order is coagulated gas heat exchanger and can be used double-flow or multipaths heat exchanger；The second level is coagulated gas heat exchanger and is used single
Flow process, and vapour side cavity is divided into two-stage B1, B2, two the most corresponding different hot pressing units of chambers.
Hot pressing unit heating system the most according to claim 4, wherein vacuum hotpressing unit use adjustable two-stage with
On the form of plural serial stage.
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