Waste steam heat energy recycling structure adopting two-stage heat exchange treatment

Abstract

The utility model relates to a waste steam heat energy recycling structure adopting two-stage heat exchange treatment, which belongs to the technical field of waste steam heat energy utilization and comprises a water tank body, a partition plate dividing the water tank body into two inner cavities is arranged in the water tank body, and a spray tower I used for being communicated with the water tank body is arranged at the upper end of one side of the water tank body. A waste steam conveying pipe communicated with the spraying tower I is arranged on the side wall of the lower portion of the spraying tower I. A spraying tower II communicated with the other side of the water tank body is arranged on the side edge of the spraying tower I. A steam-water separator communicated with the upper end of the spraying tower I, the lower portion of the spraying tower II and the water tank body through pipelines is arranged between the upper end of the spraying tower I and the lower portion of the spraying tower II. Enhanced heat exchange pieces positioned above the waste steam conveying pipe are arranged in the spray tower I and the spray tower II; and exhaust pipes are arranged at the upper ends of the spray tower I and the spray tower II. The device has the characteristics of simple structure, good cooling treatment effect and high operation stability. The problem that low-pressure waste steam heat energy is not fully utilized is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste steam heat energy utilization, in particular to a waste steam heat energy recycling structure adopting a two-level heat exchange treatment. Background Art

[0002] Due to its low pressure and temperature, low-pressure waste steam often contains non-condensable gases, a small heat transfer coefficient, and often contains other pollutants, but it contains usable heat energy. Directly discharging low-pressure waste steam into the atmosphere pollutes the environment, so it is necessary to condense the low-pressure waste steam.

[0003] In the prior art, the thermal energy of low-pressure waste steam is utilized and treated by basically using one-stage or multi-stage indirect surface heat exchangers, such as coil heat exchangers, shell-and-tube heat exchangers, plate heat exchangers, etc. However, the heat exchange effect is basically not ideal, the thermal energy of low-pressure waste steam cannot be fully utilized, and the cooling treatment effect is not ideal either. Summary of the invention

[0004] The utility model mainly solves the deficiencies in the prior art and provides a waste steam heat energy recovery structure using two-stage heat exchange treatment, which has the characteristics of simple structure, good cooling treatment effect and high operating stability, and solves the problem of insufficient utilization of low-pressure waste steam heat energy.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0006] A waste steam heat energy recovery structure using two-stage heat exchange treatment includes a water tank body, wherein the water tank body is provided with a partition which divides the water tank body into two inner cavities, a spray tower I connected to the water tank body is provided at the upper end of one side of the water tank body, a waste steam conveying pipe connected to the spray tower I is provided on the lower side wall of the spray tower I, a spray tower II connected to the other side of the water tank body is provided on the side of the spray tower I, a steam-water separator connected to the upper end of the spray tower I, the lower part of the spray tower II and the water tank body by pipelines is provided between the upper end of the spray tower I and the lower part of the spray tower II, respectively, the spray towers I and II are provided with enhanced heat exchange components located above the waste steam conveying pipe, and the upper ends of the spray towers I and II are provided with exhaust pipes.

[0007] Preferably, a dehydrator is provided between the enhanced heat exchange component and the exhaust pipe, and a nozzle pipe is provided between the dehydrator and the enhanced heat exchange component.

[0008] Preferably, a device to be heated is provided on the outside of the water tank body, a heat exchanger I connected by pipeline is provided between the device to be heated and the water tank body, and the heat exchanger I is connected by pipeline to the nozzle pipe in the spray tower I; a heat exchanger II connected by pipeline is provided between the device to be heated and the water tank body, and the heat exchanger II is connected by pipeline to the nozzle pipe in the spray tower II.

[0009] Preferably, a primary water tank is provided between the heat exchanger I and the equipment to be heated, which is connected in parallel with the heat exchanger I and is connected to the heat exchanger I and the equipment to be heated by pipeline. A secondary water tank is provided between the heat exchanger II and the equipment to be heated, which is connected in parallel with the heat exchanger II and is connected to the heat exchanger I and the equipment to be heated by pipeline. A water replenishment pump II is provided on the side of the secondary water tank, which is connected to the upper part of the secondary water tank by pipeline.

[0010] Preferably, water pumps are provided between the primary water tank and the equipment to be heated, between the primary water tank and heat exchanger I, between heat exchanger I and the water tank body, between the equipment to be heated and the secondary water tank, between the secondary water tank and heat exchanger II, and between heat exchanger II and the water tank body.

[0011] Preferably, both sides of the water tank body are provided with a water replenishment pump I which is connected to the upper part of the water tank body through a pipeline, and an overflow pipe which is connected to the water tank body through a pipeline is provided below the water replenishment pump I.

[0012] Preferably, a regulating valve is provided on the waste steam conveying pipe.

[0013] The utility model can achieve the following effects:

[0014] The utility model provides a waste steam heat energy recovery structure using two-stage heat exchange treatment, which has the characteristics of simple structure, good cooling treatment effect and high operation stability compared with the prior art, and solves the problem of insufficient utilization of low-pressure waste steam heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] In the figure: equipment to be heated 1, primary water tank 2, heat exchanger I 3, waste steam delivery pipe 4, regulating valve 5, spray tower I 6, enhanced heat exchange element 7, steam-water separator 8, exhaust pipe 9, dehydrator 10, nozzle pipe 11, spray tower II 12, make-up water pump I 13, overflow pipe 14, heat exchanger II 15, make-up water pump II 16, secondary water tank 17, water pump 18, water tank body 19, partition 20. DETAILED DESCRIPTION

[0017] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0018] Example: Figure 1 As shown, a waste steam heat energy recycling structure using two-stage heat exchange treatment includes a water tank body 19, a partition 20 is provided inside the water tank body 19 to divide the water tank body 19 into two inner chambers, a water replenishment pump Ⅰ13 connected to the upper part of the water tank body 19 is provided on both sides of the water tank body 19, and an overflow pipe 14 connected to the water tank body 19 is provided below the water replenishment pump Ⅰ13. A spray tower Ⅰ6 connected to the water tank body 19 is provided at the upper end of one side of the water tank body 19, and a waste steam delivery pipe 4 connected to the spray tower Ⅰ6 is provided on the lower side wall of the spray tower Ⅰ6, and a regulating valve 5 is provided on the waste steam delivery pipe 4. A spray tower II 12 connected to the other side of the water tank body 19 is provided on the side of the spray tower I 6, and a steam-water separator 8 connected to the upper end of the spray tower I 6, the lower part of the spray tower II 12 and the water tank body 19 is provided between the upper end of the spray tower I 6 and the lower part of the spray tower II 12. The spray tower I 6 and the spray tower II 12 are provided with an enhanced heat exchange component 7 located above the waste steam delivery pipe 4, and an exhaust pipe 9 is provided at the upper end of the spray tower I 6 and the spray tower II 12. A dehydrator 10 is provided between the enhanced heat exchange component 7 and the exhaust pipe 9, and a nozzle pipe 11 is provided between the dehydrator 10 and the enhanced heat exchange component 7. The equipment to be heated 1 is arranged outside the water tank 19, and a heat exchanger I3 connected by pipeline is arranged between the equipment to be heated 1 and the water tank body 19, and the heat exchanger I3 is connected by pipeline to the nozzle pipe 11 in the spray tower I6; a heat exchanger II15 connected by pipeline is arranged between the equipment to be heated 1 and the water tank body 19, and the heat exchanger II15 is connected by pipeline to the nozzle pipe 11 in the spray tower II12. A primary water tank 2 connected in parallel with the heat exchanger I3 and connected by pipeline to the heat exchanger I3 and the equipment to be heated 1 is arranged between the heat exchanger I3 and the equipment to be heated 1. A secondary water tank 17 connected in parallel with the heat exchanger II15 and connected by pipeline to the heat exchanger I3 and the equipment to be heated 1 is arranged between the heat exchanger II15 and the equipment to be heated 1, and a water replenishment pump II16 connected by pipeline to the upper part of the secondary water tank 17 is arranged on the side of the secondary water tank 17. Water pumps 18 are provided between the primary water tank 2 and the equipment to be heated 1, between the primary water tank 2 and heat exchanger Ⅰ3, between heat exchanger Ⅰ3 and water tank body 19, between the equipment to be heated 1 and the secondary water tank 17, between the secondary water tank 17 and heat exchanger Ⅱ15, and between heat exchanger Ⅱ15 and water tank body 19.

[0019] Working principle: The water tank body 19 is separated by a partition 20. Water is replenished into the water tank body 19 through the water replenishment pump Ⅰ13. After the water level is replenished to a reasonable level, the circulating water pump 18 is started. Low-temperature cold water is first sprayed from the nozzle pipe 11. Low-pressure waste steam passes through the waste steam delivery pipe 4 and is regulated and controlled by the regulating valve 5. The waste steam enters the spray tower Ⅰ6 and the spray tower Ⅱ12 from the spray tower Ⅰ6. Low-temperature cold water is sprayed from the nozzle pipe 11 and the heat exchange component 7 is enhanced between the air inlet and the nozzle pipe 11. The waste steam of the enhanced heat exchanger 7 is condensed into water and enters the water tank 19 with the spray water. The heat energy of the waste steam heats the low-temperature water through heat exchange, and the water temperature rises to a temperature close to the saturation temperature of the waste steam in a short time, and then circulates into the water tank 19. The water tank 19 is transported to the heat exchanger I3 and the heat exchanger II15 through the water pump 18, and the temperature is gradually reduced and utilized. The circulating water after cooling becomes low-temperature water, and then returns to the nozzle pipe 11 for spraying after passing through the outlet of the heat exchanger I3 and the heat exchanger II15 pipeline. After the steam and the spray water are mixed and heat exchanged, some droplets flow upward with the uncondensed air and the waste steam that has not been completely condensed. After passing through the upper dehydrator 10 for gas-water separation, the gas-water separator 8 installed on the outlet pipeline is separated again, and the separated water returns to the water tank 19 through the return pipe. Steam and non-condensable gas enter the spray tower II 12 for heat exchange, and the uncondensed air and the waste steam flow that is not completely condensed flow upward, pass through the upper dehydrator 10 for gas-water separation, and are discharged from the exhaust pipe 9.

[0020] In summary, the waste steam heat energy recovery structure using two-stage heat exchange treatment has the characteristics of simple structure, good cooling treatment effect and high operation stability, and solves the problem of insufficient utilization of low-pressure waste steam heat energy.

[0021] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0022] In summary, the above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A waste steam heat energy recovery structure using two-stage heat exchange treatment, characterized in that: The invention comprises a water tank body (19), wherein the water tank body (19) is provided with a partition (20) for dividing the water tank body (19) into two inner chambers, an upper end of one side of the water tank body (19) is provided with a spray tower I (6) for communicating with the water tank body (19), a lower side wall of the spray tower I (6) is provided with a waste steam conveying pipe (4) communicating with the spray tower I (6), and a side of the spray tower I (6) is provided with a spray nozzle (20) for communicating with the other side of the water tank body (19). Spray tower II (12), a steam-water separator (8) is provided between the upper end of the spray tower I (6) and the lower part of the spray tower II (12), which is connected to the upper end of the spray tower I (6), the lower part of the spray tower II (12) and the water tank body (19) through pipelines respectively, and the spray tower I (6) and the spray tower II (12) are provided with an enhanced heat exchange component (7) located above the waste steam conveying pipe (4), and the upper ends of the spray tower I (6) and the spray tower II (12) are provided with an exhaust pipe (9).

2. The waste steam heat energy recovery structure using two-stage heat exchange treatment according to claim 1 is characterized in that: A dehydrator (10) is provided between the enhanced heat exchange component (7) and the exhaust pipe (9), and a nozzle pipe (11) is provided between the dehydrator (10) and the enhanced heat exchange component (7).

3. The waste steam heat energy recovery structure using two-stage heat exchange treatment according to claim 2 is characterized in that: A device to be heated (1) is provided outside the water tank body (19); a heat exchanger I (3) connected by pipeline is provided between the device to be heated (1) and the water tank body (19); the heat exchanger I (3) is connected by pipeline to the nozzle pipe (11) in the spray tower I (6); a heat exchanger II (15) connected by pipeline is provided between the device to be heated (1) and the water tank body (19); the heat exchanger II (15) is connected by pipeline to the nozzle pipe (11) in the spray tower II (12).

4. The waste steam heat energy recovery structure using two-stage heat exchange treatment according to claim 3 is characterized in that: A primary water tank (2) is provided between the heat exchanger I (3) and the equipment to be heated (1), which is connected in parallel with the heat exchanger I (3) and is connected to the heat exchanger I (3) and the equipment to be heated (1) by pipeline. A secondary water tank (17) is provided between the heat exchanger II (15) and the equipment to be heated (1), which is connected in parallel with the heat exchanger II (15) and is connected to the heat exchanger I (3) and the equipment to be heated (1) by pipeline. A water replenishment pump II (16) is provided on the side of the secondary water tank (17), which is connected to the upper part of the secondary water tank (17) by pipeline.

5. The waste steam heat energy recovery structure using two-stage heat exchange treatment according to claim 4 is characterized in that: Water pumps (18) are provided between the primary water tank (2) and the equipment to be heated (1), between the primary water tank (2) and the heat exchanger I (3), between the heat exchanger I (3) and the water tank body (19), between the equipment to be heated (1) and the secondary water tank (17), between the secondary water tank (17) and the heat exchanger II (15), and between the heat exchanger II (15) and the water tank body (19).

6. The waste steam heat energy recovery structure using two-stage heat exchange treatment according to claim 1 is characterized in that: Both sides of the water tank body (19) are provided with a water replenishment pump I (13) which is connected to the upper part of the water tank body (19) through a pipeline, and an overflow pipe (14) which is connected to the water tank body (19) through a pipeline is provided below the water replenishment pump I (13).

7. The waste steam heat energy recovery structure using two-stage heat exchange treatment according to claim 1 is characterized in that: The waste steam conveying pipe (4) is provided with a regulating valve (5).

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