CN202707153U - Thermoelectricity cooling co-production system utilizing steam heat accumulator - Google Patents

Abstract

The utility model discloses a heat, electricity and cold cogeneration system using a steam heat accumulator, comprising a boiler, a high-pressure gas distribution cylinder, a superheater, a back pressure steam turbine unit, a generator set, a steam heat accumulator, a steam user, a steam generator, Absorption refrigerating machine, vehicle workshop, low-pressure sub-cylinder, desuperheater, boiler feed water system, extraction condensing steam turbine unit, the steam outlet of the low-pressure sub-cylinder is connected to the extraction condensing steam turbine unit one way, and the other way is connected to the Connected to the car room, with a steam accumulator in series in the middle, a steam extraction port of the extraction condensing steam turbine unit is connected to the car room, the steam outlet of the extraction condensing turbine unit is connected to the boiler water supply system, and an absorption refrigerator is connected in series in the middle . The steam outlet of the back-pressure steam turbine unit of this system is connected in parallel with the steam accumulator, and the steam inlet is connected in parallel with the temperature and pressure reducer, so that the power generation is stable, and the whole system has a high utilization rate of waste heat. Cooling capacity.

Description

Cogeneration System of Heat, Electricity and Cooling Using Steam Regenerator

technical field

The utility model relates to a waste heat utilization system, in particular to a heat, electricity and cold cogeneration system using a steam heat accumulator.

Background technique

With the lack of energy and the increasing requirements for energy conservation and emission reduction, the comprehensive utilization technology of energy is constantly improving. Northern cities plan combined heat and power supply for centralized heating to replace the original single boiler centralized heating to meet the requirements of energy saving and emission reduction. To make full use of waste heat, better realize energy saving and emission reduction, and at the same time ensure the safe and reliable operation of heat production plants and heating networks, various technologies for utilizing waste heat are emerging, such as storing through steam accumulators, incorporating into heating networks, or through Mobile heating and water supply vehicles are directly pulled to users. The recently emerged combined heat and power technology can increase the utilization rate of waste heat by at least 5%. In this way, my country's combined heat and power has developed rapidly. During the "Eleventh Five-Year Plan" period, the installed capacity of newly added heat supply units in the country was about 60 million kilowatts. By 2010, the total installed capacity of heat supply units will reach 130 million kilowatts. About 17% of the total capacity of the generating set.

At the same time, studies have shown that the feed water passing through the steam turbine still has high heat utilization value. For example, after the superheated steam passes through the back pressure steam turbine to generate mechanical energy, it is still steam, which can be directly supplied to steam users, which has high utilization value; The water temperature at the outlet of the steam turbine unit can reach 80 degrees. If this part of the water is passed through the absorption chiller to generate cooling capacity, it can cool down the office workshop and worker operation workshop of the summer factory. After cooling, this part of the water can be used as boiler feed water Send it back to the boiler for reuse, and the utilization rate of waste heat will be greatly improved, but the patented technology in this area is still a blank.

Contents of the invention

In order to make full use of the waste heat and make the waste heat energy provide cooling capacity for the factory in summer, the utility model provides a system for realizing the cogeneration of cooling, heating and power by using the waste heat. Boiler, high-pressure sub-cylinder, superheater, back pressure steam turbine unit, generator set, steam heat accumulator a, steam heat accumulator b, steam heat accumulator c, steam user, steam generator, absorption refrigerating machine, for automobile Between, low-pressure sub-cylinder, temperature and pressure reducer, boiler feed water system, extraction condensing steam turbine unit, the boiler is connected to the steam inlet of the high-pressure sub-cylinder, and the steam outlet of the high-pressure sub-cylinder is connected to the back-pressure steam turbine unit one way, and the other way is connected The steam inlet of the pressure reducer, and the steam outlet of the desuperheater and pressure reducer are connected to the steam inlet of the low-pressure sub-cylinder.

The steam outlet of the low-pressure sub-cylinder is divided into two routes, one is connected to the extraction condensing steam turbine unit, and the other is connected to the gas workshop. The superheater and the steam extraction port of the extraction condensing turbine unit are connected to the vehicle room, and there is a steam accumulator b connected in parallel between them, and the steam outlet of the steam accumulator c is connected to the vehicle room, and the steam outlet of the extraction condensing steam turbine unit is connected to the vehicle room There are three routes, one is connected to the steam inlet of the absorption chiller, the other is connected to the steam user, the steam generator is connected in series in the middle, and the other is directly connected to the boiler water supply system, and the steam outlet of the absorption chiller is connected to the boiler feed water system.

The beneficial effects of the utility model are:

1. Through the steam outlet of the back pressure steam turbine unit, the steam heat accumulator is connected in parallel, the steam inlet is passed through the high-pressure sub-cylinder, and the temperature and pressure reducer is connected in parallel, so that the fluctuation of the steam pressure at the inlet of the back pressure steam turbine and the fluctuation of the steam pressure at the outlet are solved. The power generation is more stable, and at the same time, the exported steam can be directly supplied to users. Compared with parallel condensing steam turbines or extraction condensing steam turbines, the equipment connection is simple and the cost is low.

2. The steam outlet of the low-pressure sub-cylinder is connected to the car room and the extraction condensing steam turbine. There is a steam heat accumulator in series in the middle of the connecting car room, and an extraction port of the extraction condensing steam turbine is also connected to the car room, which fully guarantees the The steam consumption in the car room is stable.

3. The steam condensed water from the outlet of the extraction condensing turbine enters the absorption chiller, which not only provides cooling capacity for the whole factory, but also makes full use of the waste heat of the condensed water, and the condensed water enters the boiler water supply system to realize the recycling of water.

Description of drawings

Fig. 1 is the waste heat utilization system diagram of the utility model

1. Boiler 2. High-pressure sub-cylinder 3. Superheater 4. Back pressure steam turbine unit 5. Generating unit 6. Power grid

7. Steam accumulator a 8. Steam user 9. Steam generator 10. Absorption refrigerator 11. Cooling water outlet port

12. Cooling water inlet 13. Automobile workshop 14. Steam accumulator b 15. Steam accumulator c 16. Low-pressure sub-cylinder 17. Pressure reducer 18. Boiler water supply system 19. Condensing steam turbine unit.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

As shown in Figure 1, the cogeneration system using steam accumulator includes boiler 1, high-pressure sub-cylinder 2, superheater 3, back pressure steam turbine unit 4, generator unit 5, power grid 6, and steam accumulator a7 , steam user 8, steam generator 9, absorption refrigerating machine 10, cooling water outlet 11, cooling water inlet 12, vehicle 13, steam accumulator b14, steam accumulator c15, low pressure sub-cylinder 16, reducing Temperature and pressure reducer 17, boiler water supply system 18, extraction condensing steam turbine unit 19, the steam outlet of boiler 1 is connected to the steam inlet of high-pressure sub-cylinder 2, and the steam outlet of high-pressure sub-cylinder 2 is connected to the back-pressure steam turbine unit 3 all the way. The steam inlet of the temperature and pressure reducer 17, the mechanical output end of the back pressure steam turbine unit 4 is connected to the generator set 5, and the electricity sent by the generator set 5 is sent to the power grid 6, and the outlet of the temperature reducer and pressure reducer 17 is connected to the steam inlet of the low-pressure sub-cylinder 16 , the mechanical output end of the extraction condensing steam turbine unit is connected to the generator set 5, and the electricity sent by the generator set 5 is sent to the grid 6, and the steam outlet of the low-pressure sub-cylinder 16 is connected to the extraction condensing steam turbine unit 19 all the way, and all the way is connected to the vehicle room 13. There is a steam heat accumulator c15 in series in the middle, a superheater 3 is connected in series between the high-pressure sub-cylinder 2 and the back pressure steam turbine unit 4, and the steam extraction port of the extraction condensing steam turbine unit 19 is connected to the automobile room 13, and there is a parallel connection between them. The steam outlets of steam heat accumulator b14 and steam heat accumulator c15 are connected to the automobile workshop 13, and the steam outlets of the extraction condensing turbine unit 19 are divided into three paths, one path is connected to the steam inlet of absorption refrigerator 10, and the other path is connected to the steam user 8 Connection, the steam generator 9 is connected in series in the middle, and all the way is directly connected with the boiler feed water system 18. In winter, the steam outlet of the extraction condensing turbine unit 19 directly enters the boiler feed water system 18 without passing through it; . The steam outlet of the absorption refrigerating machine 10 is connected to the boiler feed water system 18 . The cooling water required by the absorption chiller 10 comes from groundwater. The groundwater enters the absorption chiller 10 through the cooling water inlet port 12, and enters the central air-conditioning system of the factory through the cooling water outlet port 11 after being cooled by the evaporator.

The steam from the boiler 1 directly enters the high-pressure sub-cylinder, and the steam from the high-pressure sub-cylinder 2 is sent to the back-pressure steam turbine unit 4 to drive the rotor of the steam turbine to rotate after being overheated by the heater 3, and the rotation of the rotor drives the generator unit 5 to generate electric energy , the generated electric energy is sent to the grid. The low-pressure saturated steam from the back pressure steam turbine unit 4 is directly supplied to the steam user 8. The steam heat accumulator a7 is connected in parallel at the outlet of the back pressure steam turbine unit 4. According to the actual needs of the factory, multiple steam heat accumulators a7 can be arranged. The connection relationship between the heat storage unit and the heat accumulator is parallel connection. The other steam enters the low-pressure sub-cylinder 16 after being cooled down by the temperature and pressure reducer 17, and the gas from the low-pressure sub-cylinder directly enters the extraction condensing steam turbine unit 19 for power generation, and enters the steam heat accumulator c15 all the way through After the steam heat accumulator is depressurized, it is sent to the vehicle room 13, and a part of the steam is extracted from the steam extraction port of the condensing steam turbine unit 19 and sent to the vehicle room 13. The steam heat accumulator b14 is connected in parallel in the middle, and the number of steam heat accumulators is equal to Arranged according to the actual needs of the factory, the relationship during the heat storage period is parallel connection. The condensed water coming out of the pumping condensing turbine can be used as boiler feed water. In summer, the condensed water can be used to produce cooling capacity through the absorption refrigerator 10 and enter the central air-conditioning system 11 to cool the entire factory. The condensed water can also pass through steam The generator 9 becomes steam supplied to the steam user 8 .

Claims (1)

1. A cogeneration system of heat, electricity and cooling using a steam accumulator, including a boiler (1), a high-pressure sub-cylinder (2), a superheater (3), a back pressure steam turbine unit (4), a generator unit (5), Steam heat accumulator a (7), steam heat accumulator b (14), steam heat accumulator c (15), steam user (8), steam generator (9), absorption refrigerating machine (10), for cars Room (13), low-pressure sub-cylinder (16), desuperheater (17), boiler feed water system (18), extraction condensing steam turbine unit (19), boiler (1) connected to high-pressure sub-cylinder (2) for steam intake The steam outlet of the high-pressure sub-cylinder (2) is connected to the back pressure steam turbine unit (4), the other is connected to the steam inlet of the temperature reducer (17), and the steam outlet of the temperature reducer (17) is connected to the low-pressure branch Cylinder (16) steam inlet, It is characterized in that the steam outlet of the low-pressure sub-cylinder (16) is divided into two paths, one path is connected to the extraction condensing steam turbine unit (19), the other path is connected to the vehicle room (13), and a steam heat accumulator c (15) is connected in series in the middle ), the superheater (3) is connected in series between the high-pressure sub-cylinder (2) and the back-pressure steam turbine unit (4), and the steam extraction port of the extraction condensing steam turbine unit (19) is connected to the vehicle room (13), There is a steam accumulator b (14) connected in parallel between them, the steam outlet of the steam accumulator c (15) is connected to the automobile room (13), and the steam outlet of the extraction condensing steam turbine unit (19) is divided into three routes, one route Connect the steam inlet of the absorption refrigerating machine (10), one line is connected with the steam user (8), the steam generator (9) is connected in series in the middle, one line is directly connected with the boiler feed water system (18), and the steam outlet of the absorption refrigerating machine (10) Connect boiler feed water system (18).

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