Efficient energy-saving urban distributed heating and cooling system

Abstract

The utility model relates to the technical field of heating and cooling, and discloses an efficient energy-saving urban distributed heating and cooling system which comprises a supply side, a user side and a supply pipeline, and the supply side comprises a heat source system, a cold source system and a centralized control device and is used for supplying cold, heat and electricity in different modes. The heat source system comprises a high-efficiency gas turbine and a flue gas waste heat boiler, the high-efficiency gas turbine and the flue gas waste heat boiler are communicated to form a whole, the high-efficiency gas turbine and the flue gas waste heat boiler are communicated with a heating exchange device and used for providing a heat source for the whole system, and the heating exchange device is communicated with a centralized regulation and control device. By using the efficient energy-saving urban distributed heating and cooling system, the supply efficiency is improved, the energy is saved, the heating and cooling function requirements of urban residents in winter and summer are met, and meanwhile, the problem that the current city only has winter urban heating is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to city heating and cooling technology field, concretely is a kind of high-efficiency energy-saving city distribution type heating and cooling system. BACKGROUND

[0002] In order to meet the heating, cooling needs of urban residents in winter and summer, improve supply efficiency, save energy, a high-efficiency energy-saving city distribution type heating and cooling system is needed, which is equipped with high-efficiency gas turbine and flue gas waste heat boiler, uses city natural gas as fuel to generate electricity to meet the power needs of system equipment, flue gas waste heat boiler uses flue gas of gas turbine to produce steam as heat source for the system, and lithium bromide refrigerating unit is also equipped to provide cold source for the system, so as to realize the functions of heating and cooling for urban residents and solve the current single problem of city heating in winter only.

[0003] The current single city central heating system faces several problems:

[0004] 1. City central heating mainly relies on natural gas, industrial waste heat and coal power to generate heat source through boiler, but its operation efficiency is low and the heating is unstable.

[0005] 2. Heating service is limited to November to March of the next year, resulting in short operation cycle and increased labor cost.

[0006] 3. There is waste of project investment, and the capital recovery cycle is long; in addition, heating subsidies also bring additional burden to the finance.

[0007] Therefore, we propose a high-efficiency energy-saving city distribution type heating and cooling system. SUMMARY

[0008] In view of the shortcomings of the prior art, the utility model provides a high-efficiency energy-saving city distribution type heating and cooling system, which solves the problems of low operation efficiency and unstable heating of the existing heating system.

[0009] To achieve the above purpose, the utility model realizes the following technical scheme: a high-efficiency energy-saving city distribution type heating and cooling system, characterized by comprising supply side, user side and supply pipeline, the supply side includes heat source system, cold source system and centralized control device, for realizing different mode of cold, heat and electricity supply, the heat source system includes high-efficiency gas turbine and flue gas waste heat boiler, the high-efficiency gas turbine and flue gas waste heat boiler are communicated to form a whole, the high-efficiency gas turbine and flue gas waste heat boiler are communicated with heating exchange device, for providing heat source for the whole system;

[0010] The heating exchange device is communicated with a centralized control device, a hot water pump and a first temperature regulating valve are arranged on a pipeline through which the heating exchange device and the centralized control device are communicated, the centralized control device is communicated with a supply pipeline and is provided with an external delivery pressure pump, an outlet flow regulating valve and an outlet stop valve, the centralized control device sends hot water to each user in the city through the supply pipeline via the external delivery pressure pump, the outlet flow regulating valve and the outlet stop valve, and after use, the circulating backflow water is connected to the centralized control device through a backflow pipeline, a backflow stop valve, a backflow regulating valve and a backflow pump, and the centralized control device forms a hot water circulating heat exchange loop and a cold water circulating heat exchange loop.

[0011] Preferably, the user side includes a heating facility, a cold air facility and an air conditioning control system, the heating facility includes floor heating or heating radiators, and the cold air facility includes a fan coil unit, in a winter period, pipe network hot water is communicated with the floor heating through an entrance stop valve, a user flow regulating valve, a first heating stop valve and a floor heating check valve, or is communicated with the heating radiators through a second heating stop valve, to form a warm air system, and in a summer period, pipe network cold water is communicated with the fan coil unit through the entrance stop valve, the user flow regulating valve and a cold air stop valve, to form a cold air system.

[0012] Preferably, the user side heating facility and the user side cold air facility pipeline are communicated with a user backflow regulating valve, a user backflow check valve and a backflow pipeline, and the used water flows back to the supply side through the backflow pipeline.

[0013] Preferably, the heat source provided by the high-efficiency gas turbine and the flue gas waste heat boiler enters the centralized control device through the heating exchange device, the hot water pump and the first temperature regulating valve.

[0014] Preferably, the cold source provided by the refrigeration unit is communicated with the centralized control device through the cooling exchange device, the cold water pump and the second temperature regulating valve.

[0015] Preferably, the hot water circulating heat exchange loop includes a hot water circulating backflow pipeline and a hot water backflow check valve, the centralized control device is connected with the heating exchange device through the hot water circulating backflow pipeline and the hot water backflow check valve, to form the hot water circulating heat exchange loop, the cold source system includes a refrigeration unit, the refrigeration unit is communicated with the cooling exchange device, to provide a cold source for the system, the cold water circulating heat exchange loop includes a cold water circulating backflow pipeline and a cold water backflow check valve, and the centralized control device is connected with the cooling exchange device through the cold water circulating backflow pipeline and the cold water backflow check valve, to form the cold water circulating heat exchange loop.

[0016] Preferably, the centralized control device includes a hot water regulating valve, a hot water stop valve, a cold water stop valve and a cold water regulating valve, and the hot water regulating valve and the cold water regulating valve are controlled to be opened or closed by a valve control device through a second control signal cable.

[0017] Preferably, the centralized control device further comprises a hot water return stop valve, a cold water return stop valve, a hot water return regulating valve and a cold water return regulating valve; the hot water return regulating valve and the cold water return regulating valve are controlled by the valve control device through a third control signal cable to open or close.

[0018] Preferably, the user flow regulating valve and the user return regulating valve are connected with the air conditioner control device through a first control signal cable respectively to form an air conditioner control system, and the air conditioner control device comprises a flow monitoring control module and a built-in temperature sensor.

[0019] Preferably, the hot water stop valve, the cold water stop valve, the hot water return stop valve and the cold water return stop valve are manually operated to open or close.

[0020] The utility model provides a kind of high-efficiency energy-saving urban distribution type heating and cooling system.It has the following beneficial effects:

[0021] 1, the utility model for use high-efficiency energy-saving urban distribution type heating and cooling system, improve supply efficiency, save energy, realize the heating and cooling function demand of urban residents in winter and summer, while solve the single problem of current urban winter urban heating.

[0022] 2, the utility model makes full use of natural gas resources, not only provides heat energy, but also can generate electricity, power supply for the electric equipment of system, improve energy utilization efficiency, system can flexibly switch heating and cooling mode, through centralized control device, season change is responded quickly, meets the heating and cooling demand of different seasons.

[0023] 3, the utility model utilizes flue gas waste heat boiler, maximizes recovery and utilization of waste heat, reduces energy waste, reduces carbon emission, is more friendly to environment, user can adjust indoor temperature according to self demand through air conditioner control system, realizes personalized comfortable experience, while supporting the flexible configuration of enhanced heating or cold air facility BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 It is overall structure schematic view of the utility model;

[0025] Figure 2 It is supply side structure schematic view of the utility model;

[0026] Figure 3 It is user side structure schematic view of the utility model;

[0027] Figure 4 It is supply side centralized control device schematic view of the utility model.

[0028] 1, high efficiency gas turbine; 2, flue gas waste heat boiler; 3, refrigerating unit; 4, heating exchange device; 5, hot water pump; 6, first temperature regulating valve; 7, centralized control device; 701, hot water regulating valve; 702, hot water stop valve; 703, cold water stop valve; 704, cold water regulating valve; 705, hot water backflow stop valve; 706, cold water backflow stop valve; 707, hot water backflow regulating valve; 708, cold water backflow regulating valve; 709, valve control device; 710, second control signal cable; 711, third control signal cable; 8, external sending pressurizing pump; 9, outlet flow regulating valve; 10, outlet stop valve; 11, hot water circulating backflow pipe; 12, hot water backflow check valve; 13, cold water circulating backflow pipe; 14, cold water backflow check valve; 15, cold supply exchange device; 16, cold water pump; 17, second temperature regulating valve; 18, backflow pump; 19, backflow regulating valve; 20, backflow stop valve; 21, supply pipe; 22, backflow pipe; 23, household stop valve; 24, user flow regulating valve; 25, air conditioning control device; 26, first control signal cable; 27, first heating stop valve; 28, floor heating; 29, floor heating check valve; 30, second heating stop valve; 31, heating radiator; 32, cold air stop valve; 33, fan coil unit; 34, cold air check valve; 35, user backflow regulating valve; 36, user backflow check valve. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the present application specification. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application. EMBODIMENT

[0030] Please refer to the drawings of the present application specification Figure 1 - the drawings of the present application specification Figure 4 The embodiment of the present application provides a high-efficiency energy-saving urban distribution type heating and cooling system, which comprises a supply side, a user side and a supply pipeline, the supply side comprises a heat source system, a cold source system and a centralized control device, and can realize combined supply of cold, heat and electricity, the heat source system comprises a high-efficiency gas turbine 1 and a flue gas waste heat boiler 2, the high-efficiency gas turbine 1 is communicated with the flue gas waste heat boiler 2 to form an integral whole, the high-efficiency gas turbine 1 and the flue gas waste heat boiler 2 are communicated with a heating exchange device 4 to provide a heat source for the whole system, and meanwhile, the high-efficiency gas turbine 1 provides electric energy for electric equipment and facilities of the supply side system; the cold source system comprises a refrigerating unit 3, the refrigerating unit 3 is communicated with a cold supply exchange device 15, and through the communication with the cold supply exchange device 15, the system is provided with a cold source.

[0031] The heating exchange device 4 is communicated with the centralized control device 7, and the heating exchange device 4 and the centralized control device 7 are communicated with a pipeline, wherein the pipeline is provided with a hot water pump 5 and a first temperature regulating valve 6; the heat source provided by the high-efficiency gas turbine 1 and the flue gas waste heat boiler 2 enters the centralized control device 7 through the heating exchange device 4, the hot water pump 5 and the first temperature regulating valve 6; the centralized control device 7 is communicated with a supply pipeline 21 and is provided with an external delivery pressurizing pump 8, an outlet flow regulating valve 9 and an outlet stop valve 10; the centralized control device 7 sends the hot water to each user in the city through the supply pipeline 21 by the external delivery pressurizing pump 8, the outlet flow regulating valve 9 and the outlet stop valve 10.

[0032] The refrigerating unit 3 is a lithium bromide refrigerating unit, and the cold source provided by the refrigerating unit 3 is communicated with the centralized control device 7 through a cooling exchange device 15, a cold water pump 16 and a second temperature regulating valve 17; the centralized control device 7 sends the cold water to each user in the city through the supply pipeline 21 by the external delivery pressurizing pump 8, the outlet flow regulating valve 9 and the outlet stop valve 10; meanwhile, the circulating backflow water used by the user enters the centralized control device 7 through a backflow pipeline 22, a backflow regulating valve 19, a backflow pump 18 and a backflow stop valve 20; the centralized control device 7 is connected with the heating exchange device 4 through a hot water circulating backflow pipeline 11 and a hot water backflow check valve 12, so as to form a hot water circulating heat exchange loop; similarly, the centralized control device 7 is connected with the cooling exchange device 15 through a cold water circulating backflow pipeline 13 and a cold water backflow check valve 14, so as to form a cold water circulating heat exchange loop.

[0033] The user side includes a heating facility, a cooling facility and an air conditioning control system, the air conditioning control system is constructed by the user, the heating facility includes a floor heating device 28 or a heating radiator 31, and the cooling facility includes a fan-coil unit 33; in a winter period, the pipe network hot water is communicated with the floor heating device 28 through an entrance stop valve 23, a user flow regulating valve 24, a first heating stop valve 27 and a floor heating check valve 29, or is communicated with the heating radiator 31 through a second heating stop valve 30, so as to form a warm air system; similarly, in a summer period, the pipe network cold water is communicated with the fan-coil unit 33 through the entrance stop valve 23, the user flow regulating valve 24, a cooling stop valve 32 and a cooling check valve 34, so as to form a cold air system; finally, the user side heating facility and cooling facility pipeline are communicated with the backflow pipeline 22 through a user backflow regulating valve 35 and a user backflow check valve 36, and the used water flows back to the supply side through the backflow pipeline 22.

[0034] The user flow regulating valve 24 and the user backflow regulating valve 35 are connected with an air conditioning control device 25 through a first control signal cable 26 respectively, so as to form the air conditioning control system; meanwhile, the user can increase the heating facility, the cooling facility and the air conditioning control device according to the house type and the room as needed, and connects the air conditioning pipeline through the regulating valve and the check valve in parallel, so that each room is used and controlled individually, and the air conditioning control device 25 includes a flow monitoring control module and a built-in temperature sensor.

[0035] The centralized control device 7 comprises a hot water regulating valve 701, a hot water stop valve 702, a cold water stop valve 703, a cold water regulating valve 704; the hot water regulating valve 701 and the cold water regulating valve 704 are in an "or" relationship, and the hot water regulating valve 701 and the cold water regulating valve 704 are controlled by the valve control device 709 through the second control signal cable 710 to open or close. The centralized control device 7 further comprises a hot water return stop valve 705, a cold water return stop valve 706, a hot water return regulating valve 707, and a cold water return regulating valve 708; the hot water return regulating valve 707 and the cold water return regulating valve 708 are in an "or" relationship, and are controlled by the valve control device 709 through the third control signal cable 711 to open or close. The hot water stop valve 702 and the cold water stop valve 703 are in an "or" relationship, and the hot water return stop valve 705 and the cold water return stop valve 706 are in an "or" relationship, and are manually operated to open or close.

[0036] Working principle:

[0037] The supply side heat source is composed of a high-efficiency gas turbine 1 and a flue gas waste heat boiler 2. The high-efficiency gas turbine 1 uses city natural gas to generate electricity, and the generated electricity is supplied to the system electric equipment. The high-temperature flue gas enters the flue gas waste heat boiler 2 to form steam. The steam passes through the heating exchange device 4 to heat the water, and then the hot water is sent to each user in the city through the supply pipeline 21 by the centralized control device 7. The supply side cold source system is composed of a lithium bromide refrigerating unit 3. The lithium bromide refrigerating unit 3 performs steam heat exchange through the cooling exchange device 15 to cool the water, and then the cold water is sent to each user in the city through the supply pipeline 21 by the centralized control device 7. The return water after use of each user is returned to the centralized control device 7 through the return pipeline 22, and then enters the hot water or cold water circulating heat exchange loop through the circulating return pipeline.

[0038] By setting the supply side centralized control device 7, when hot water is supplied, the hot water stop valve 702 and the hot water return stop valve 705 are manually opened, and the cold water stop valve 703 and the cold water return stop valve 706 are manually closed. The centralized control device 7 controls the hot water regulating valve 701 and the hot water return regulating valve 707 to be opened and the cold water regulating valve 704 and the cold water return regulating valve 708 to be closed through the second control signal cable 710 and the third control signal cable 711. Conversely, when cold water is supplied, the valve state is switched in the opposite direction, so as to connect the cold water sending loop and the return circulating loop.

[0039] The user side comprises a heating facility, a cooling facility and an air conditioner control system, the heating facility and the cooling facility are both provided with a manual stop valve at the pipeline inlet, and the user switches the heating or cooling by manually operating the valve; the air conditioner control device 25 comprises a flow monitoring control module and a built-in temperature sensor, the control module controls the user flow regulating valve 24 and the user backflow regulating valve 35 through a first control signal cable 26 to form an air conditioner control system, and the built-in temperature sensor can monitor the indoor temperature and feed back to the monitoring control module; the user monitors and controls the entering flow of hot water and cold water through the air conditioner control device 25 to adjust the indoor temperature. At the same time, the user can increase the heating facility, the cooling facility and the air conditioner control device according to the house type and the room as needed, and connect in parallel to the air conditioner pipeline through regulating valves, check valves and the like, so that each room can be used and controlled individually

[0040] It should be finally pointed out that the above only describes the preferred embodiments of the present application and is not intended to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or make equivalent replacement for some of the technical features, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A high-efficiency and energy-saving urban distributed heating and cooling system, characterized in that: The application relates to a heat supply system, which comprises a supply side, a user side and a supply pipeline, wherein the supply side comprises a heat source system, a cold source system and a centralized control device, the heat source system comprises a high-efficiency gas turbine (1) and a flue gas waste heat boiler (2), and the high-efficiency gas turbine (1) and the flue gas waste heat boiler (2) are communicated with a heating exchange device (4); The heating exchange device (4) is communicated with a centralized control device (7), a hot water pump (5) and a first temperature regulating valve (6) are arranged on a pipeline communicated between the heating exchange device (4) and the centralized control device (7), the centralized control device (7) is communicated with a supply pipeline (21) and is provided with an external delivery pressure pump (8), an outlet flow regulating valve (9) and an outlet stop valve (10), the centralized control device (7) sends hot water to various users in a city through the supply pipeline (21) via the external delivery pressure pump (8), the outlet flow regulating valve (9) and the outlet stop valve (10), and after use, the circulating backflow water is connected to the centralized control device (7) via a backflow pipeline (22), a backflow regulating valve (19), a backflow pump (18) and a backflow stop valve (20), the centralized control device (7) forms a hot water circulating heat exchange loop and a cold water circulating heat exchange loop.

2. The high-efficiency energy-saving urban distributed heating and cooling system according to claim 1, characterized in that: The user side comprises a heating facility, a cold air facility and an air conditioning control system, the heating facility comprises floor heating (28) or heating radiators (31), the cold air facility comprises a fan-coil unit (33), in a winter period, pipeline network hot water is communicated with the floor heating (28) via an entrance stop valve (23), a user flow regulating valve (24), a first heating stop valve (27) and a floor heating check valve (29), or is communicated with the heating radiators (31) via a second heating stop valve (30), thereby forming a warm air system, in a summer period, pipeline network cold water is communicated with the fan-coil unit (33) via the entrance stop valve (23), the user flow regulating valve (24), a cold air stop valve (32) and a cold air check valve (34), thereby forming a cold air system.

3. The energy-efficient urban distributed heating and cooling system of claim 2, wherein: The heating facility and the cold air facility pipeline are communicated with the backflow pipeline (22) via a user backflow regulating valve (35) and a user backflow check valve (36).

4. The energy-efficient urban distributed heating and cooling system of claim 1, wherein: The heat source provided by the high-efficiency gas turbine (1) and the flue gas waste heat boiler (2) is connected to the centralized control device (7) via the heating exchange device (4), the hot water pump (5) and the first temperature regulating valve (6).

5. The energy-efficient urban distributed heating and cooling system of claim 1, wherein: The hot water circulating heat exchange loop comprises a hot water circulating backflow pipeline (11) and a hot water backflow check valve (12), the centralized control device (7) is connected to the heating exchange device (4) via the hot water circulating backflow pipeline (11) and the hot water backflow check valve (12), thereby forming the hot water circulating heat exchange loop, the cold source system comprises a refrigeration unit (3), the refrigeration unit (3) is communicated with a cooling exchange device (15), the cold water circulating heat exchange loop comprises a cold water circulating backflow pipeline (13) and a cold water backflow check valve (14), and the centralized control device (7) is connected to the cooling exchange device (15) via the cold water circulating backflow pipeline (13) and the cold water backflow check valve (14), thereby forming the cold water circulating heat exchange loop.

6. The energy-efficient urban distributed heating and cooling system of claim 5, wherein: The refrigerating unit (3) is a lithium bromide refrigerating unit, and the cold source provided by the refrigerating unit is communicated with the centralized control device (7) through the cooling exchange device (15), the cold water pump (16) and the second temperature regulating valve (17).

7. The energy-efficient urban distributed heating and cooling system of claim 1, wherein: The centralized control device (7) comprises a hot water regulating valve (701), a hot water stop valve (702), a cold water stop valve (703), and a cold water regulating valve (704), wherein the hot water regulating valve (701) and the cold water regulating valve (704) are controlled to be opened or closed by the valve control device (709) through the second control signal cable (710).

8. The energy-efficient urban distributed heating and cooling system of claim 1, wherein: The centralized control device (7) further comprises a hot water backflow stop valve (705), a cold water backflow stop valve (706), a hot water backflow regulating valve (707), and a cold water backflow regulating valve (708), wherein the hot water backflow regulating valve (707) and the cold water backflow regulating valve (708) are controlled to be opened or closed by the valve control device (709) through the third control signal cable (711).

9. The energy-efficient urban distributed heating and cooling system of claim 2, wherein: The user flow regulating valve (24) and the user backflow regulating valve (35) are connected to the air conditioner control device (25) through the first control signal cable (26) respectively, and the air conditioner control device (25) comprises a flow monitoring control module and an embedded temperature sensor.

10. The energy-efficient urban distributed heating and cooling system of claim 7, wherein: The hot water stop valve (702), the cold water stop valve (703), the hot water backflow stop valve (705), and the cold water backflow stop valve (706) are manually operated to be opened or closed.

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