CN113007765B - Multi-heat-source mixed supply automatic regulating system for heating steam and scheduling method - Google Patents
Multi-heat-source mixed supply automatic regulating system for heating steam and scheduling method Download PDFInfo
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- CN113007765B CN113007765B CN202110217350.3A CN202110217350A CN113007765B CN 113007765 B CN113007765 B CN 113007765B CN 202110217350 A CN202110217350 A CN 202110217350A CN 113007765 B CN113007765 B CN 113007765B
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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
- F24D1/06—Steam central heating systems operating with superheated steam
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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
- F24D1/08—Feed-line arrangements, e.g. providing for heat-accumulator tanks, expansion tanks
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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
- F24D19/00—Details
- F24D19/10—Arrangement or mounting of control or safety devices
- F24D19/1003—Arrangement or mounting of control or safety devices for steam heating systems
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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
- F24D2200/00—Heat sources or energy sources
- F24D2200/32—Heat sources or energy sources involving multiple heat sources in combination or as alternative heat sources
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Abstract
The invention relates to a multi-heat source mixed supply automatic regulating system and a dispatching method for heating steam, which comprises a heating steam equipment connecting system and an automatic regulating system; the equipment connecting system comprises a first heat source point, a second heat source point, a heat utilization sheet area, a first heat supply steam pipeline, a second heat supply steam pipeline and a main heat supply steam pipeline, wherein the first heat source point comprises a back press machine, and the second heat source point comprises a fuel gas cogeneration heat supply generator; the first and second heat supply steam pipelines are provided with an electric control valve, a flow, temperature and pressure meter, a steam-water separator, a drain valve, an automatic drain trap, a manual valve and an electric and manual regulating valve, and the main heat supply steam pipeline is provided with a flow, temperature and pressure main meter; the automatic adjusting system comprises a data acquisition terminal, a data transmission system and a control system. The invention can meet the matching and timeliness of heat source point back pressure economic operation, heat supply steam overheat transmission, heat utilization energy saving of heat users and heat load scheduling to the maximum extent, and practically avoid the delay of personnel to field operation.
Description
Technical Field
The invention belongs to the technical field of steam pipelines, and particularly relates to a multi-heat-source mixed supply automatic adjusting system and a dispatching method for heating steam.
Background
In the traditional steam type centralized heating project, a heat source point is easy to fluctuate by the peak-valley fluctuation of the heat load in a heating plate area at night, a heating production mode of a back pressure machine and a condensing machine is generally configured, the back pressure machine carries basic load, and the condensing machine adjusts the peak to supplement so as to achieve supply and demand balance. The heat supply pipe network is also easily influenced by peak-valley load, so that the configuration of the conveying pipe diameter is unreasonable, condensed water is separated out, and the phenomenon of pipe explosion caused by water attack of the steam pipe network is caused. The hot user facilities are vulnerable to water attack of the condensed water, drainage and safety are needed, and the part of heat is directly discharged into the air and cannot be effectively utilized. In addition, under the influence of seasonal changes of the heat supply areas, the heat load changes of the areas are obvious, the peak-valley contradiction is more prominent, and the heat supply system scheduling needs to be adjusted in time so as to adapt to new balance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides a multi-heat-source mixed supply automatic regulating system and a method for heating steam; by adopting the technical scheme of the invention, the range of back pressure economic operation of the heat source point heat supply unit is effectively expanded, the matching degree of a heat supply pipe network and a heat load is improved, condensate water precipitation is reduced to the maximum extent, the bottleneck of upstream and downstream safety economy is opened, the real-time automatic allocation of the heat load is realized, the matching and timeliness of the back pressure economic operation of the heat source point, heat supply steam overheat transmission, heat consumption energy saving of heat users and heat load scheduling are met to the maximum extent, and the delay of personnel to field operation is practically avoided.
According to the technical scheme provided by the invention, the automatic regulating system for multi-heat-source mixed supply of the heating steam comprises a heating steam equipment connecting system and an automatic regulating system;
the heat supply steam equipment connecting system comprises a first heat source point, a second heat source point, a heat utilization area, a first heat supply steam pipeline, a second heat supply steam pipeline and a main heat supply steam pipeline, wherein the first heat source point comprises a back pressure machine, and the second heat source point comprises a gas cogeneration heat supply generator;
the automatic adjusting system comprises a data acquisition terminal, a control system and a data transmission system;
the back press is connected with a first heat supply steam pipeline, the gas cogeneration heat supply generator is connected with a second heat supply steam pipeline, a main heat supply steam pipeline is connected with a heat utilization area, and the first heat supply steam pipeline, the second heat supply steam pipeline and the main heat supply steam pipeline are connected with three interfaces of the reducing tee;
a first electric control valve, a first flow meter, a first temperature meter, a first pressure meter, a first steam-water separator, a first valve group front flow meter, a first valve group front temperature meter, a first valve group front pressure meter, a first mixed supply adjusting valve group, a first valve group rear flow meter, a first valve group rear temperature meter and a first valve group rear pressure meter are sequentially arranged on a first heat supply steam pipeline behind the back pressure machine;
the first steam-water separator is connected with a first steam-water separation pipeline, a first drain valve and a first automatic drain device are arranged on the first steam-water separation pipeline, and the first automatic drain device is arranged behind the first drain valve;
the first mixed supply adjusting valve group comprises a first manual valve, a first electric adjusting valve and a first manual adjusting valve, the first manual valve is installed on a first heat supply steam pipeline, two branch pipes are connected in parallel on the first heat supply steam pipeline between a first valve group front pressure meter and a first valve group rear flow meter, two first manual adjusting valves and one first electric adjusting valve are arranged on each branch pipe, and the first electric adjusting valve is located between the two first manual adjusting valves;
a second electric control valve, a second flow meter, a second temperature meter, a second pressure meter, a second steam-water separator, a second valve group front flow meter, a second valve group front temperature meter, a second valve group front pressure meter, a second mixed supply adjusting valve group, a second valve group rear flow meter, a second valve group rear temperature meter and a second valve group rear pressure meter are sequentially arranged on a second heat supply steam pipeline behind the gas cogeneration heat supply generator;
a second steam-water separation pipeline is connected to the second steam-water separator, a second drain valve and a second automatic steam trap are arranged on the second steam-water separation pipeline, and the second automatic steam trap is arranged behind the second drain valve;
the second mixed supply adjusting valve group comprises a second manual valve, a second electric adjusting valve and a second manual adjusting valve, the second manual valve is installed on a second heat supply steam pipeline, two branch pipes are connected in parallel on the second heat supply steam pipeline between a front pressure meter of the second valve group and a rear flow meter of the second valve group, two second manual adjusting valves and one second electric adjusting valve are arranged on each branch pipe, and the second electric adjusting valve is located between the two second manual adjusting valves;
a main flow meter, a main temperature meter and a main pressure meter are sequentially arranged on the main heat supply steam pipeline behind the reducing tee;
the first electric control valve, the second electric control valve, the first electric control valve and the second electric control valve are all connected with a data transmission system;
the first flowmeter, the first temperature meter, the first pressure meter, the first valve group front flowmeter, the first valve group front temperature meter, the first valve group front pressure meter, the first valve group rear flowmeter, the first valve group rear temperature meter, the first valve group rear pressure meter, the second flowmeter, the second temperature meter, the second pressure meter, the second valve group front flowmeter, the second valve group front temperature meter, the second valve group front pressure meter, the second valve group rear flowmeter, the second valve group rear temperature meter, the second valve group rear pressure meter, the main flowmeter and the main flowmeter are all connected with the data acquisition terminal through signal cables, control cables and power cables, the data acquisition terminal is connected with the data transmission system, the data transmission system is connected with the control system.
Preferably, the first steam trap, the second steam trap, the first manual valve and the second manual valve are normally open valves.
Preferably, the first heating steam line and the second heating steam line have a length of at least 5 km.
A dispatching method realized based on a multi-heat-source mixed supply automatic regulating system for heating steam comprises the following steps:
s1, adjusting the first electric control valve to ensure that the output heat load of the back press is 70-100%;
s2, acquiring the temperature T of the heat parameter needed by the heat sheet areaMaster and slavePressure PMaster and slaveFlow rate QMaster and slaveAnd the parameter temperature T of the superheated steam delivered from the first heat source point to the heat sheet using area1Pressure P1Flow rate Q1By the formula Q1+Q2＝Q3、|P1|·|P2|＝P3、|T1|·|T2|＝T3Calculating to obtain the temperature T of the heat supply parameter from the second heat source point to the heat using plate area2Pressure P2Flow rate Q2；
S3, heating parameter temperature T from the second heat source point to the heat using sheet area is obtained according to calculation2Pressure P2Flow rate Q2And the opening degree of a second electric control valve on the second heat supply steam pipeline is adjusted through the control system, and the opening degree of a second electric control valve is finely adjusted, so that the superheated steam parameter requirement of a heat utilization area is met, and the stable operation of the mixed supply system is ensured.
Compared with the traditional heating system, the invention has the following beneficial effects: the invention effectively widens the range of back pressure economic operation of the heat supply point heat supply unit, improves the matching degree of the heat supply pipe network and the heat load, reduces the precipitation of condensed water to the maximum extent, gets through the bottleneck of upstream and downstream safety economy, realizes the real-time automatic allocation of the heat load, meets the requirements of the back pressure economic operation of the heat supply point, the overheat delivery of heat supply steam, the heat consumption energy conservation of heat users and the matching property and the timeliness of heat load scheduling to the maximum extent, and practically avoids the delay of the operation from personnel to the site.
Drawings
Fig. 1 is a connection structure diagram of a connection system of a heating and steaming device according to the present invention.
FIG. 2 is a diagram of a connection structure of the automatic adjusting system of the present invention.
Detailed Description
The present invention will be further described with reference to the following specific examples.
The invention relates to a multi-heat-source mixed supply automatic regulating system for heating steam, which comprises a heating steam equipment connecting system and an automatic regulating system;
the heat supply steam equipment connecting system comprises a first heat source point 3, a second heat source point 4, a heat utilization area 5, a first heat supply steam pipeline 6, a second heat supply steam pipeline 7 and a main heat supply steam pipeline 8, wherein the first heat source point 3 comprises a back pressure machine 9, and the second heat source point 4 comprises a gas cogeneration heat supply generator 10;
the automatic adjusting system comprises a data acquisition terminal 49, a control system 50 and a data transmission system 51;
the back press machine 9 is connected with a first heat supply steam pipeline 6, the gas cogeneration heat supply generator 10 is connected with a second heat supply steam pipeline 7, the main heat supply steam pipeline 8 is connected with the heat utilization area 5, and the first heat supply steam pipeline 6, the second heat supply steam pipeline 7 and the main heat supply steam pipeline 8 are connected with three interfaces of the reducing tee joint 11;
a first electric control valve 12, a first flow meter 14, a first temperature meter 15, a first pressure meter 16, a first steam-water separator 34, a first valve group front flow meter 17, a first valve group front temperature meter 18, a first valve group front pressure meter 19, a first mixed supply adjusting valve group 13, a first valve group rear flow meter 20, a first valve group rear temperature meter 21 and a first valve group rear pressure meter 22 are sequentially arranged on a first heat supply steam pipeline 6 behind the back pressure machine 9;
a first steam-water separation pipeline is connected to the first steam-water separator 34, a first steam trap 35 and a first automatic steam trap 36 are arranged on the first steam-water separation pipeline, and the first automatic steam trap 36 is arranged behind the first steam trap 35;
the first mixed supply adjusting valve group 13 comprises a first manual valve 40, a first electric adjusting valve 41 and a first manual adjusting valve 42, the first manual valve 40 is installed on the first heat supply steam pipeline 6, two branch pipes are connected in parallel on the first heat supply steam pipeline 6 between the pressure gauge 19 in front of the first valve group and the flow gauge 20 behind the first valve group, two first manual adjusting valves 42 and one first electric adjusting valve 41 are arranged on each branch pipe, and the first electric adjusting valve 41 is positioned between the two first manual adjusting valves 42;
a second electric control valve 23, a second flow meter 25, a second temperature meter 26, a second pressure meter 27, a second steam-water separator 37, a second valve group front flow meter 28, a second valve group front temperature meter 29, a second valve group front pressure meter 30, a second mixed supply adjusting valve group 24, a second valve group rear flow meter 31, a second valve group rear temperature meter 32 and a second valve group rear pressure meter 33 are sequentially arranged on the second heating steam pipeline 7 behind the gas cogeneration heating generator 10;
a second steam-water separation pipeline is connected to the second steam-water separator 37, a second steam trap 38 and a second automatic steam trap 39 are arranged on the second steam-water separation pipeline, and the second automatic steam trap 39 is arranged behind the second steam trap 38;
the second mixed supply adjusting valve group 24 comprises a second manual valve 43, a second electric adjusting valve 44 and a second manual adjusting valve 45, the second manual valve 43 is installed on the second heat supply steam pipeline 7, two branch pipes are connected in parallel on the second heat supply steam pipeline 7 between the front pressure gauge 30 of the second valve group and the rear flow gauge 31 of the second valve group, two second manual adjusting valves 45 and one second electric adjusting valve 44 are arranged on each branch pipe, and the second electric adjusting valve 44 is positioned between the two second manual adjusting valves 45;
a main flow meter 46, a main temperature meter 47 and a main pressure meter 48 are sequentially arranged on the main heating steam pipeline 8 behind the reducing tee 11;
the first electric control valve 12, the second electric control valve 23, the first electric control valve 41 and the second electric control valve 44 are all connected with a data transmission system 51;
the first flow meter 14, the first temperature meter 15, the first pressure meter 16, the first front valve group flow meter 17, the first front valve group temperature meter 18, the first front valve group pressure meter 19, the first rear valve group flow meter 20, the first rear valve group temperature meter 21, the first rear valve group pressure meter 22, the second flow meter 25, the second temperature meter 26, the second pressure meter 27, the second front valve group flow meter 28, the second front valve group temperature meter 29, the second front valve group pressure meter 30, the second rear valve group flow meter 31, the second rear valve group pressure meter 32, the second rear valve group pressure meter 33, the main flow meter 46, the main temperature meter 47 and the main pressure meter 48 are all connected with the data acquisition terminal 49 through signal cables, control cables and power cables, the data acquisition terminal 49 is connected with a data transmission system 51, and the data transmission system 51 is connected with the control system 50.
The first steam trap 35, the second steam trap 38, the first manual valve 40, and the second manual valve 43 are normally open valves.
The length of the first heating steam pipeline 6 and the second heating steam pipeline 7 is at least 5 kilometers.
A dispatching method realized based on the multi-heat-source mixed supply automatic regulating system for heat supply steam comprises the following steps:
s1, adjusting the first electric control valve 12 to ensure that the output heat load of the back press 9 is 70-100%;
s2, obtaining the required thermal parameter temperature T of the heat sheet area 5Master and slavePressure PMaster and slaveFlow rate QMaster and slaveAnd the parameter temperature T of the superheated steam delivered by the first heat source point 3 to the heat sheet using area 51Pressure P1Flow rate Q1By the formula Q1+Q2＝Q3、|P1|·|P2|＝P3、|T1|·|T2|＝T3Calculating the temperature T of the heat supply parameter from the second heat source point 4 to the heat using sheet area 52Pressure P2Flow rate Q2；
S3, according to the calculated heat supply parameter temperature T of the second heat source point 4 to the heat using sheet area 52Pressure P2Flow rate Q2The opening degree of the second electric control valve 23 on the second heat supply steam pipeline 7 is adjusted through the control system 50, and the opening degree of the second electric control valve 44 is finely adjusted, so that the requirement of superheated steam parameters of the heat sheet area 5 is met, and the stable operation of the mixed supply system is ensured.
When the gas-fired cogeneration heat supply generator works, saturated steam generated by the gas-fired cogeneration heat supply generator 10 of the second heat source point 4 is mixed and supplied to the first heat supply steam pipeline 6 for conveying superheated steam of the first heat source 3 through the second heat supply steam pipeline 6, and then the mixed saturated steam or slightly superheated steam is conveyed to the heat utilization area 5 through the main heat supply steam pipeline 8.
In the invention, two paths of the same first electric control valves 41 connected in parallel in the first mixed supply adjusting valve group 13 are used for standby, so as to prevent one first electric control valve 41 from being damaged to influence the system operation. Two paths of the same second electric control valves 44 connected in parallel in the second mixed supply adjusting valve group 24 are used for standby, so that one second electric control valve 44 is prevented from being damaged to influence the operation of the system.
In the invention, the first steam-water separator 34 can separate the steam and the condensed water in the first heat supply steam pipeline 6, and the condensed water is discharged by the first automatic steam trap 36, thereby preventing the first heat supply steam pipeline 6 from water hammer and pipe explosion during the operation process. The second steam-water separator 37 can separate the steam in the second heat supply steam pipeline 7 from the condensed water, and the condensed water is discharged by the second automatic steam trap 39, so that the phenomenon of water hammer and pipe explosion of the second heat supply steam pipeline 7 in the operation process is prevented.
In the invention, the data acquisition terminal 49 is of a WJ2005 type, the data transmission system 51 is of a GPRS type, the control system 50 is of a Keyuan NT6000 type, and the control system 50 has data storage and data analysis functions.
Claims (3)
1. A multi-heat source mixed supply automatic regulating system for heating steam is characterized in that: the system comprises a heating steam equipment connecting system and an automatic adjusting system;
the heat supply steam equipment connecting system comprises a first heat source point (3), a second heat source point (4), a heat utilization area (5), a first heat supply steam pipeline (6), a second heat supply steam pipeline (7) and a main heat supply steam pipeline (8), wherein the first heat source point (3) comprises a back pressure machine (9), and the second heat source point (4) comprises a fuel gas cogeneration heat supply generator (10);
the automatic adjusting system comprises a data acquisition terminal (49), a control system (50) and a data transmission system (51);
the back press machine (9) is connected with a first heat supply steam pipeline (6), a gas cogeneration heat supply generator (10) is connected with a second heat supply steam pipeline (7), a main heat supply steam pipeline (8) is connected with a heat utilization area (5), and the first heat supply steam pipeline (6), the second heat supply steam pipeline (7) and the main heat supply steam pipeline (8) are connected with three interfaces of a reducing tee joint (11);
a first electric control valve (12), a first flow meter (14), a first temperature meter (15), a first pressure meter (16), a first steam-water separator (34), a first valve group front flow meter (17), a first valve group front temperature meter (18), a first valve group front pressure meter (19), a first mixed supply adjusting valve group (13), a first valve group rear flow meter (20), a first valve group rear temperature meter (21) and a first valve group rear pressure meter (22) are sequentially arranged on a first heat supply steam pipeline (6) behind the back pressure machine (9);
a first steam-water separation pipeline is connected to the first steam-water separator (34), a first drain valve (35) and a first automatic drain (36) are arranged on the first steam-water separation pipeline, and the first automatic drain (36) is arranged behind the first drain valve (35);
the first mixed supply adjusting valve group (13) comprises a first manual valve (40), a first electric adjusting valve (41) and a first manual adjusting valve (42), the first manual valve (40) is installed on a first heat supply steam pipeline (6), two branch pipes are connected in parallel on the first heat supply steam pipeline (6) between a first valve group front pressure meter (19) and a first valve group rear flow meter (20), two first manual adjusting valves (42) and one first electric adjusting valve (41) are arranged on each branch pipe, and the first electric adjusting valve (41) is located between the two first manual adjusting valves (42);
a second electric control valve (23), a second flow meter (25), a second temperature meter (26), a second pressure meter (27), a second steam-water separator (37), a second valve group front flow meter (28), a second valve group front temperature meter (29), a second valve group front pressure meter (30), a second mixed supply adjusting valve group (24), a second valve group rear flow meter (31), a second valve group rear temperature meter (32) and a second valve group rear pressure meter (33) are sequentially arranged on a second heat supply steam pipeline (7) behind the gas cogeneration heat supply generator (10);
a second steam-water separation pipeline is connected to the second steam-water separator (37), a second drain valve (38) and a second automatic steam trap (39) are arranged on the second steam-water separation pipeline, and the second automatic steam trap (39) is arranged behind the second drain valve (38);
the second mixed supply adjusting valve group (24) comprises a second manual valve (43), a second electric adjusting valve (44) and a second manual adjusting valve (45), the second manual valve (43) is installed on a second heat supply steam pipeline (7), two branch pipes are connected in parallel on the second heat supply steam pipeline (7) between a second valve group front pressure gauge (30) and a second valve group rear flow gauge (31), two second manual adjusting valves (45) and one second electric adjusting valve (44) are arranged on each branch pipe, and the second electric adjusting valve (44) is located between the two second manual adjusting valves (45);
a main flow meter (46), a main temperature meter (47) and a main pressure meter (48) are sequentially arranged on the main heating steam pipeline (8) behind the reducing tee (11);
the first electric control valve (12), the second electric control valve (23), the first electric control valve (41) and the second electric control valve (44) are all connected with a data transmission system (51);
the first flow meter (14), the first temperature meter (15), the first pressure meter (16), the first valve group front flow meter (17), the first valve group front temperature meter (18), the first valve group front pressure meter (19), the first valve group rear flow meter (20), the first valve group rear temperature meter (21), the first valve group rear pressure meter (22), the second flow meter (25), the second temperature meter (26), the second pressure meter (27), the second valve group front flow meter (28), the second valve group front temperature meter (29), the second valve group front pressure meter (30), the second valve group rear flow meter (31), the second valve group rear temperature meter (32), the second valve group rear pressure meter (33), the main flow meter (46), The temperature main meter (47) and the pressure main meter (48) are connected with a data acquisition terminal (49) through a signal cable, a control cable and a power cable, the data acquisition terminal (49) is connected with a data transmission system (51), and the data transmission system (51) is connected with a control system (50).
2. A multi-heat-source mixed-supply automatic regulating system for supplying heat steam according to claim 1, characterized in that: the first steam trap (35), the second steam trap (38), the first manual valve (40) and the second manual valve (43) are normally open valves.
3. A multi-heat-source mixed-supply automatic regulating system for supplying heat steam according to claim 1, characterized in that: the length of the first heat supply steam pipeline (6) and the second heat supply steam pipeline (7) is at least 5 kilometers.
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| CN109854315A (en) * | 2019-02-02 | 2019-06-07 | 华电电力科学研究院有限公司 | A kind of heating system and its operation method integrated for Combined cycle gas-steam turbine unit steam extraction |
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2021
- 2021-02-26 CN CN202110217350.3A patent/CN113007765B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106096248A (en) * | 2016-06-03 | 2016-11-09 | 国家电网公司 | The selection method of the optimal heating system under varying environment |
| CN208310858U (en) * | 2018-03-28 | 2019-01-01 | 中机国际工程设计研究院有限责任公司 | Turbine medium-low pressure communication pipe heating system |
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