CN220417434U - Double-heat-source combined heat exchange station based on steam and air source - Google Patents

Abstract

The utility model discloses a double-heat-source combined heat exchange station based on steam and air sources, and relates to the technical field of heat exchange stations. The utility model combines the traditional cogeneration steam heat supply with the air energy heat supply, and designs a double-heat-source combined heat exchange station system based on steam and air sources. By adding the air source heat supply circulation part in the traditional steam heat exchange station, the effect of the heat exchange station in load adjustment is greatly improved, and the method has great significance in guaranteeing heat supply quality and integrating adjustment of a centralized heat supply source network.

Description

Double-heat-source combined heat exchange station based on steam and air source

Technical Field

The utility model relates to the technical field of heat exchange stations, in particular to a double-heat-source combined heat exchange station based on steam and air sources.

Background

The cogeneration central heating taking steam as a heat source is used as a mature heating mode, is widely applied to northeast, north China and partial middle areas of China, and the steam is taken as the steam produced by the cogeneration of a large-scale thermal power unit, and has the characteristics of energy conservation, environmental protection and low cost. However, the heating mode has obvious defects that firstly, the cogeneration unit bears the power generation peak regulation and the heating load at the same time, the power generation peak regulation and the heating load are mutually restricted, the load regulation capacity of the unit on the heating network is limited, and the operation pressure is high in the peak period in winter. Meanwhile, in the conveying process of heat supply steam through the pipe network, the pipe network loss is large, and when the whole steam supply amount of the pipe network is insufficient, the condition of insufficient flow and temperature pressure parameters easily occurs in some pipe network tail end areas, so that the heat supply effect is poor.

Referring to fig. 1, the heat exchange station is an important link of cogeneration central heating, and bears the functions of heat exchange of a primary network and a secondary network and regulation of regional heating load, and is generally regulated by regulating steam inlet quantity, so that the regulation capability of the steam heating heat exchange station is limited by the steam supply load and the steam supply quality of a steam pipe network. As described above, the heat exchange station may have insufficient load adjustment capability under the condition of relying on the heat supply network for steam.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model aims to provide a double-heat-source combined heat exchange station based on steam and air sources, which is more flexible and efficient in heat supply load adjustment due to the cooperation of double heat sources, is beneficial to guaranteeing heat supply quality, and is energy-saving and synergistic.

In order to achieve the above purpose, the utility model adopts the following technical scheme: a double-heat-source combined heat exchange station based on steam and air sources comprises a spiral winding heat exchanger, a plate heat exchanger, a fin evaporator and a water tank; the first port of the spiral winding heat exchanger is sequentially connected with a first butterfly valve, a second butterfly valve, a first vortex shedding flowmeter and a third butterfly valve in series and then is connected with an external heating water supply end; the second port of the spiral winding heat exchanger is sequentially connected with the fourth butterfly valve, the fifth butterfly valve and the sixth butterfly valve in series and then is connected with an external heating backwater end; the third port of the spiral winding heat exchanger is sequentially connected with a seventh butterfly valve, a second vortex shedding flowmeter, a first electric valve regulating valve and a eighth butterfly valve in series and then is connected with an external steam end; a joint IV of the spiral winding heat exchanger is sequentially connected with a butterfly valve III and a water tank in series; the first port of the plate heat exchanger is sequentially connected with the first ball valve, the first check valve, the second ball valve, the gas-liquid separator, the centrifugal compressor and the third ball valve in series, and then is connected with the first port of the fin evaporator; the second port of the plate heat exchanger is sequentially connected with the liquid storage tank, the filter, the second electric regulating valve, the electronic expansion valve and the fourth ball valve in series and then is connected with the second port of the fin evaporator; the third joint of the plate heat exchanger is connected with the tenth end of the butterfly valve and then is connected with the fifth end of the butterfly valve; the fourth interface of the plate heat exchanger is connected with the eleventh butterfly valve and then is connected with the distal end of the fifth butterfly valve; the water tank is respectively connected with the proximal end of the first electric regulating valve and the proximal end of the sixth butterfly valve.

The further improvement is that: the butterfly valve is characterized by further comprising a butterfly valve twelve, wherein two ends of the butterfly valve twelve are respectively connected with the far end of the butterfly valve I and the far end of the butterfly valve IV.

The further improvement is that: the fin evaporator is connected with an axial flow fan.

The further improvement is that: and drainage devices are arranged between the electric regulating valve I and the water tank and between the spiral winding heat exchanger and the butterfly valve III.

The further improvement is that: the drainage device comprises two branches connected in parallel, wherein one branch is provided with a first stop valve, and the other branch is provided with a second stop valve, a steam trap and a third stop valve which are sequentially connected in series.

The further improvement is that: and a vertical dirt remover is arranged between the butterfly valve five and the butterfly valve six.

The further improvement is that: and variable-frequency water pump devices are arranged between the butterfly valve V and the vertical dirt remover and between the water tank and the butterfly valve V.

The further improvement is that: the variable-frequency water pump device comprises a plurality of branches connected in parallel, and each branch is provided with a butterfly valve thirteen, a check valve II, a variable-frequency water pump and a butterfly valve fourteen which are sequentially connected in series.

The further improvement is that: the variable-frequency water pump device positioned between the butterfly valve V and the vertical dirt remover is also connected with a branch, and the branch is provided with a butterfly valve fifteen, a check valve III and a butterfly valve sixteen which are sequentially connected in series.

The further improvement is that: the water tank is also connected with a seventeen butterfly valves, a water softener and eighteen butterfly valves in series and then connected with an external tap water end.

The utility model has the beneficial effects that:

according to the utility model, the steam and air source are more flexible and efficient in adjusting the cooperative heating load, the adjusting speed and adjusting amplitude are larger, the method can be suitable for various different conditions, the peak regulating pressure of a power plant is reduced, the stability of a heating system is improved, the excessive heating caused by the limitation of the steam supply adjusting speed and amplitude can be eliminated, and the method has the advantages of ensuring the heating quality, accurately adjusting the heat load and saving energy and enhancing efficiency.

Drawings

FIG. 1 is a schematic diagram of a prior art heat exchange station

FIG. 2 is a schematic diagram of a dual heat source unified heat exchange station based on steam and air sources in an embodiment of the utility model;

FIG. 3 is a schematic diagram of a dual heat source unified heat exchange station based on steam and air sources in an embodiment of the utility model.

Reference numerals:

26-a spiral wound heat exchanger; 23-plate heat exchanger; 10-fin evaporator; 44-a water tank; 13-a gas-liquid separator; 12-centrifugal compressor; 17-a liquid storage tank; 18-a filter; 20-an electronic expansion valve; 11-an axial flow fan; 6-steam trap; 33-a vertical dirt remover; 31-a variable-frequency water pump; 42-water softener;

49-butterfly valve I; 8-a second butterfly valve; 22-butterfly valve III; 48-butterfly valve IV; 46-butterfly valve V; 28-butterfly valve six; a 4-butterfly valve seven; 1-butterfly valve eight; 41-butterfly valve nine; 24-butterfly valve ten; 25-butterfly valve eleven; 45-butterfly valve twelve; 29-butterfly valve thirteen; 32-butterfly valve fourteen; fifteen of 40-butterfly valves; 38-sixteen butterfly valves; seventeen of a 43-butterfly valve; eighteen 50-butterfly valves;

7-vortex shedding flowmeter I; 3-vortex street flowmeter II;

2-an electric valve I; 19-an electric valve II;

16-ball valve I; 14-a ball valve II; 9-ball valve III; 21-ball valve IV;

15-check valve one; 30-a second check valve; 39-check valve three;

47-first stop valve; 5-a second stop valve; 27-stop valve three.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout.

In the description of the present utility model, it should be noted that, for the azimuth words such as the terms "center", "transverse (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, only for convenience of describing the present utility model and simplifying the description, but do not indicate or imply that the apparatus or element to be referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and should not be construed as limiting the specific protection scope of the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such feature, and in the description of the present utility model, the meaning of "a number", "a number" is two or more, unless otherwise specifically defined.

The technical scheme and the beneficial effects of the utility model are more clear and definite by further describing the specific embodiments of the utility model with reference to the drawings in the specification. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the utility model and are not to be construed as limiting the utility model.

Referring to fig. 2 and 3, an embodiment of the present utility model provides a dual heat source combined heat exchange station based on steam and air sources, comprising a spiral wound heat exchanger 26, a plate heat exchanger 23, a fin evaporator 10 and a water tank 44;

the first port of the spiral winding heat exchanger 26 is sequentially connected with a first butterfly valve 49, a second butterfly valve 8, a first vortex shedding flowmeter 7 and a third butterfly valve 22 in series and then is connected with an external heating water supply end; the second port of the spiral winding heat exchanger 26 is sequentially connected with a fourth butterfly valve 48, a fifth butterfly valve 46 and a sixth butterfly valve 28 in series and then is connected with an external heating backwater end; the third port of the spiral winding heat exchanger 26 is sequentially connected with a butterfly valve seven 4, a vortex shedding flowmeter II 3, an electric valve I2 and a butterfly valve eight 1 in series and then connected with an external steam end; the interface IV of the spiral wound heat exchanger 26 is sequentially connected with a butterfly valve III 41 and a water tank 44 in series; specifically, the butterfly valve twelve 45 is further included, and two ends of the butterfly valve twelve 45 are respectively connected with the distal end of the butterfly valve one 49 and the distal end of the butterfly valve four 48.

The first port of the plate heat exchanger 23 is sequentially connected with a first ball valve 16, a first check valve 15, a second ball valve 14, a gas-liquid separator 13, a centrifugal compressor 12 and a third ball valve 9 in series and then is connected with the first port of the fin evaporator 10; the second port of the plate heat exchanger 23 is sequentially connected with the second port of the fin evaporator 10 after being connected with the liquid storage tank 17, the filter 18, the electric regulating valve II 19, the electronic expansion valve 20 and the ball valve IV 21 in series; the third interface of the plate heat exchanger 23 is connected with the tenth butterfly valve 24 and then is connected with the proximal end of the fifth butterfly valve 46; the fourth interface of the plate heat exchanger 23 is connected with the eleventh butterfly valve 25 and then is connected with the distal end of the fifth butterfly valve 46; specifically, the fin evaporator 10 is connected with an axial flow fan 11.

The water tank 44 is connected to the proximal end of the first electrically operated valve 2 and the proximal end of the sixth butterfly valve 28, respectively. Specifically, the water tank 44 is also connected with the butterfly valve seventeen 43, the water softener 42 and the butterfly valve eighteen 50 in series and then connected with an external tap water end.

Referring to fig. 3, drainage devices are arranged between the electric valve one 2 and the water tank 44, and between the spiral wound heat exchanger 26 and the butterfly valve nine 41. Specifically, the drainage device comprises two parallel branches, wherein one branch is provided with a first stop valve 47, and the other branch is provided with a second stop valve 5, a steam trap 6 and a third stop valve 27 which are sequentially connected in series.

Referring to fig. 3, a vertical scrubber 33 is provided between the fifth butterfly valve 46 and the sixth butterfly valve 28. Specifically, variable-frequency water pump devices are arranged between the fifth butterfly valve 46 and the vertical dirt remover 33 and between the water tank 44 and the sixth butterfly valve 28. The variable-frequency water pump device comprises a plurality of branches connected in parallel, and each branch is provided with a butterfly valve thirteen 29, a check valve II 30, a variable-frequency water pump 31 and a butterfly valve fourteen 32 which are sequentially connected in series. The variable-frequency water pump 31 device positioned between the butterfly valve five 46 and the vertical dirt remover 33 is also connected in parallel with a branch, and the branch is provided with a butterfly valve fifteen 40, a check valve three 39 and a butterfly valve sixteen 38 which are sequentially connected in series.

The working principle of the utility model is as follows:

1) The steam is heated by the heat supply and consumption heat supply network to exchange heat with the heat through the spiral winding heat exchanger 26, heating water is supplied by heating, generated drain water flows into the water tank 44, and the heat supply quantity of the steam is regulated by the electric regulating valve I2.

2) The air source supplies heat to consume electric energy, and absorbs heat from the air to heat heating water supply through reverse Carnot circulation; the heated gaseous refrigerant from the fin evaporator 10 is compressed and boosted by the centrifugal compressor 12 to be converted into a high-temperature liquid state, after passing through the vapor-liquid separator, the high-temperature liquid refrigerant exchanges heat with the water side through the plate heat exchanger 23 to heat and supply water, the cooled refrigerant is stored by the liquid storage tank 17, the refrigerant from the liquid storage tank 17 is filtered by the filter 18, and after being depressurized and cooled by the electronic expansion valve 20, the cooled refrigerant flows through the fin evaporator 10 to exchange heat with air, wherein the axial flow fan 11 has the function of enabling the air to continuously flow through the fin evaporator 10 to strengthen the heat exchange effect. The refrigerant absorbs heat and then turns into a gaseous state, and flows to the centrifugal compressor 12. The heat supply quantity of the air source is regulated by the centrifugal compressor 12, the electronic expansion valve 20 and the electric regulating valve II 19.

3) The secondary net water circulation of the system provides pressure difference through a variable frequency water pump device between a butterfly valve five 46 and a vertical type dirt separator 33, the constant pressure is subjected to variable frequency constant pressure through a variable frequency water pump device between a water tank 44 and a butterfly valve six 28, the variable frequency water pump device can be formed by connecting two or more variable frequency water pumps 31 in parallel, the water replenishing of the system is determined according to actual requirements, the water replenishing of the system is carried out by taking water, softening the water by a water softener 42, storing the softened water by the water replenishing tank 44, and replenishing the water to the secondary net through the variable frequency water pumps 31.

4) When the butterfly valves twelve 45 and five 46 are closed, and the butterfly valves ten 24, eleven 25, four 48 and one 49 are opened, the heat supply of the two can be respectively adjusted according to the actual conditions, and the device is suitable for the situation that the steam supply can not meet the requirements or the air source is required to assist in heat load adjustment.

5) When the butterfly valve ten 24, the butterfly valve eleven 25 and the butterfly valve twelve 45 are closed, and the butterfly valve five 46, the butterfly valve four 48 and the butterfly valve one 49 are opened to supply heat for steam, only the heat supply quantity of the steam can be regulated at the moment, and the butterfly valve is suitable for the conditions that the steam supply is sufficient and the heat load regulation requirement can be met.

6) When the butterfly valve five 46, the butterfly valve four 48 and the butterfly valve one 49 are closed, the butterfly valve ten 24, the butterfly valve eleven 25 and the butterfly valve twelve 45 are opened to supply heat for the air source, only the heat supply quantity of the air source can be adjusted at the moment, and the method is suitable for the condition that steam cannot be supplied due to the reasons of machine unit shutdown, steam pipe network leakage, pipe network operation strategy adjustment and the like.

7) The fin evaporator 10 and the axial flow fan 11 are required to be placed outdoors or on a roof and protected by a housing. And the rest pipelines and equipment are laid for heat preservation.

The utility model combines the traditional cogeneration steam heat supply with the air energy heat supply, and designs a double-heat-source combined heat exchange station system based on steam and air sources. By adding the air source heat supply circulation part in the traditional steam heat exchange station, the effect of the heat exchange station in load adjustment is greatly improved, and the method has great significance in guaranteeing heat supply quality and integrating adjustment of a centralized heat supply source network.

In the description of the present utility model, a description of the terms "one embodiment," "preferred," "example," "specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model, and a schematic representation of the terms described above in the present specification does not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

From the above description of the structure and principles, it should be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, but rather that modifications and substitutions using known techniques in the art on the basis of the present utility model fall within the scope of the present utility model, which is defined by the appended claims.

Claims (10)

1. A dual heat source unified heat exchange station based on steam and air sources comprising a spiral wound heat exchanger (26), characterized in that: the heat exchanger also comprises a plate heat exchanger (23), a fin evaporator (10) and a water tank (44);

the first port of the spiral winding heat exchanger (26) is sequentially connected with a first butterfly valve (49), a second butterfly valve (8), a first vortex shedding flowmeter (7) and a third butterfly valve (22) in series and then is connected with an external heating water supply end; the second port of the spiral winding heat exchanger (26) is sequentially connected with a fourth butterfly valve (48), a fifth butterfly valve (46) and a sixth butterfly valve (28) in series and then is connected with an external heating water return end; the third port of the spiral winding heat exchanger (26) is sequentially connected with a butterfly valve seven (4), a vortex shedding flowmeter II (3), an electric valve regulating valve I (2) and a butterfly valve eight (1) in series and then is connected with an external steam end; a fourth interface of the spiral winding heat exchanger (26) is sequentially connected with a butterfly valve nine (41) and a water tank (44) in series;

the first port of the plate heat exchanger (23) is sequentially connected with the first ball valve (16), the first check valve (15), the second ball valve (14), the gas-liquid separator (13), the centrifugal compressor (12) and the third ball valve (9) in series and then is connected with the first port of the fin evaporator (10); the second port of the plate heat exchanger (23) is sequentially connected with the second port of the fin evaporator (10) after being connected with the liquid storage tank (17), the filter (18), the second electric regulating valve (19), the electronic expansion valve (20) and the fourth ball valve (21) in series; the interface III of the plate heat exchanger (23) is connected with the butterfly valve II (24) and then is connected with the proximal end of the butterfly valve III (46); the fourth interface of the plate heat exchanger (23) is connected with the eleventh butterfly valve (25) and then is connected with the distal end of the fifth butterfly valve (46);

the water tank (44) is respectively connected with the proximal end of the electric regulating valve I (2) and the proximal end of the butterfly valve II (28).

2. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 1 wherein: the butterfly valve further comprises a butterfly valve twelve (45), and two ends of the butterfly valve twelve (45) are respectively connected with the distal end of the butterfly valve one (49) and the distal end of the butterfly valve four (48).

3. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 1 wherein: the fin evaporator (10) is connected with an axial flow fan (11).

4. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 1 wherein: drainage devices are arranged between the electric regulating valve I (2) and the water tank (44) and between the spiral winding heat exchanger (26) and the butterfly valve II (41).

5. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 4 wherein: the drainage device comprises two parallel branches, wherein one branch is provided with a first stop valve (47), and the other branch is provided with a second stop valve (5), a steam trap (6) and a third stop valve (27) which are sequentially connected in series.

6. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 1 wherein: a vertical dirt remover (33) is arranged between the fifth butterfly valve (46) and the sixth butterfly valve (28).

7. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 6 wherein: variable-frequency water pump devices are arranged between the fifth butterfly valve (46) and the vertical dirt remover (33) and between the water tank (44) and the sixth butterfly valve (28).

8. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 7 wherein: the variable-frequency water pump device comprises a plurality of branches connected in parallel, and each branch is provided with a butterfly valve thirteen (29), a check valve II (30), a variable-frequency water pump (31) and a butterfly valve fourteen (32) which are sequentially connected in series.

9. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 7 wherein: the variable-frequency water pump (31) device positioned between the butterfly valve V (46) and the vertical dirt remover (33) is also connected with a branch, and the branch is provided with a butterfly valve V (40), a check valve V (39) and a butterfly valve V (38) which are sequentially connected in series.

10. A dual heat source, combined heat exchange station based on steam and air sources as set forth in claim 1 wherein: the water tank (44) is also connected with a butterfly valve seventeen (43), a water softener (42) and a butterfly valve eighteen (50) in series in sequence and then is connected with an external tap water end.