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

Abstract

The utility model relates to a waste steam heat energy recycling structure adopting three-stage heat exchange treatment, which belongs to the technical field of waste steam heat energy utilization and comprises a water tank body, a first-stage spray tower communicated with the water tank body is arranged at the upper end of the water tank body, an exhaust pipe is arranged at the upper end of the first-stage spray tower, and a second-stage spray tower communicated with the exhaust pipe is arranged at the lower end of the exhaust pipe. An enhanced heat exchange piece is arranged in the middle of the first-stage spray tower, a steam exhaust pipe communicated with the first-stage spray tower is arranged on the outer side of the first-stage spray tower, and a heat exchanger I communicated with the first-stage spray tower and a tank body of the water tank through pipelines is arranged between the steam exhaust pipe and the first-stage spray tower; and a waste steam conveying pipe communicated with the lower part of the enhanced heat exchange piece is arranged between the heat exchanger I and the primary spray tower. 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 three-stage 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 three-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 three-stage heat exchange treatment includes a water tank body, a first-level spray tower connected to the water tank body is provided at the upper end of the water tank body, an exhaust pipe is provided at the upper end of the first-level spray tower, an enhanced heat exchange component is provided in the middle of the first-level spray tower, an exhaust pipe connected to the first-level spray tower is provided on the outer side of the first-level spray tower, a heat exchanger I connected to the first-level spray tower and the water tank body by pipeline is provided between the exhaust pipe and the first-level spray tower, and a waste steam conveying pipe connected to the bottom of the enhanced heat exchange component is provided between the heat exchanger I and the first-level spray tower.

[0007] Preferably, a secondary spray tower connected to the primary spray tower and the water tank body is provided on the side of the primary spray tower, an exhaust pipe is provided at the upper end of the secondary spray tower, an enhanced heat exchange component is provided in the middle of the secondary spray tower, a nozzle spray pipe is provided between the enhanced heat exchange component and the exhaust pipe, and a dehydrator is provided between the nozzle spray pipe and the exhaust pipe.

[0008] Preferably, a steam-water separator connected to the water tank body by pipeline is provided between the secondary spray tower and the primary spray tower, and the steam-water separator is connected to the lower part of the secondary spray tower and the steam-water separator is connected to the upper end of the primary spray tower by pipeline.

[0009] Preferably, a heat exchanger II connected to the water tank body by a pipeline is provided between the heat exchanger I, and a heat exchanger III is provided between the heat exchanger II and the nozzle spray pipe in the first-stage spray tower.

[0010] Preferably, the heat exchanger I is provided with a device to be heated outside and connected with the heat exchanger I by pipeline, and a secondary water tank connected with the heat exchanger I and the heat exchanger II by pipeline in parallel is provided between the heat exchanger I and the device to be heated. A primary water tank connected with the heat exchanger II and heat exchanger III by pipeline in parallel is provided between the heat exchanger II and the heat exchanger III, and a water replenishment pump II connected with the primary water tank by pipeline is provided on the side of the primary water tank.

[0011] Preferably, water pumps connected to each other by pipelines are provided between the equipment to be heated and the secondary water tank, between the secondary water tank and heat exchanger II, between heat exchanger II and the water tank body, between the primary water tank and heat exchanger II, and between the primary water tank and heat exchanger III.

[0012] Preferably, a drainage pipe connected to the heat exchanger I is provided at the lower end of the heat exchanger I, and a drain pump is provided between the drainage pipe and the heat exchanger I.

[0013] Preferably, a regulating valve is provided on the waste steam conveying pipe.

[0014] Preferably, a water replenishment pump I connected to the upper part of the water tank body through a pipeline is provided on one side of the water tank body, and an overflow pipe connected to the water tank body through a pipeline is provided below the water replenishment pump I.

[0015] The utility model can achieve the following effects:

[0016] The utility model provides a waste steam heat energy recovery structure using three-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

[0017] Figure 1 It is a structural schematic diagram of a single spray tower of the utility model.

[0018] Figure 2 It is a structural schematic diagram of multiple spray towers of the utility model.

[0019] In the figure: exhaust pipe 1, heat exchanger I 2, waste steam delivery pipe 3, regulating valve 4, exhaust pipe 5, dehydrator 6, nozzle spray pipe 7, enhanced heat exchange component 8, primary spray tower 9, water tank body 10, make-up water pump I 11, overflow pipe 12, drain pipe 13, water supply pump 14, drain pump 15, heat exchanger II 16, heat exchanger III 17, primary water tank 18, make-up water pump II 19, equipment to be heated 20, secondary water tank 21, steam-water separator 22, secondary spray tower 23. DETAILED DESCRIPTION

[0020] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0021] Example 1: Figure 1 As shown, a waste steam heat energy recovery structure using three-stage heat exchange treatment includes a water tank body 10, a water supply pump Ⅰ11 connected to the upper part of the water tank body 10 by pipeline is provided on one side of the water tank body 10, and an overflow pipe 12 connected to the water tank body 10 by pipeline is provided below the water supply pump Ⅰ11. A first-level spray tower 9 connected to the water tank body 10 is provided at the upper end of the water tank body 10, an exhaust pipe 5 is provided at the upper end of the first-level spray tower 9, an enhanced heat exchange component 8 is provided in the middle of the first-level spray tower 9, a nozzle spray pipe 7 is provided between the enhanced heat exchange component 8 and the exhaust pipe 5, and a dehydrator 6 is provided between the nozzle spray pipe 7 and the exhaust pipe 5. An exhaust pipe 1 connected to the first-stage spray tower 9 is provided outside the first-stage spray tower 9, and a heat exchanger Ⅰ2 connected to the first-stage spray tower 9 and a water tank body 10 is provided between the exhaust pipe 1 and the first-stage spray tower 9, a drain pipe 13 connected to the heat exchanger Ⅰ2 is provided at the lower end of the heat exchanger Ⅰ2, and a drain pump 15 is provided between the drain pipe 13 and the heat exchanger Ⅰ2. A waste steam delivery pipe 3 connected to the lower part of the enhanced heat exchange component 8 is provided between the heat exchanger Ⅰ2 and the first-stage spray tower 9, and a regulating valve 4 is provided on the waste steam delivery pipe 3.

[0022] A heat exchanger II16 connected by pipeline is provided between the heat exchanger I2 and the water tank body 10, and a heat exchanger III17 is provided between the heat exchanger II16 and the nozzle spray pipe 7 in the first-level spray tower 9. A device to be heated 20 connected by pipeline to the heat exchanger I2 is provided outside the heat exchanger I2, and a secondary water tank 21 connected by pipeline to the heat exchanger I2 and the heat exchanger II16 is provided between the heat exchanger I2 and the device to be heated 20. A first-level water tank 18 connected by pipeline to the heat exchanger II16 and the heat exchanger III17 is provided between the heat exchanger II16 and the heat exchanger III17, and a water supply pump II19 connected by pipeline to the first-level water tank 18 is provided on the side of the first-level water tank 18. Water pumps 14 connected by pipelines are provided between the heat supply equipment 20 and the secondary water tank 21, between the secondary water tank 21 and the heat exchanger II 16, between the heat exchanger II 16 and the water tank body 10, between the primary water tank 18 and the heat exchanger II 16, and between the primary water tank 18 and the heat exchanger III 17.

[0023] Example 2: Figure 2As shown, a waste steam heat energy recycling structure using three-stage heat exchange treatment includes a water tank body 10, a water supply pump Ⅰ11 connected to the upper part of the water tank body 10 is provided on one side of the water tank body 10, and an overflow pipe 12 connected to the water tank body 10 is provided below the water supply pump Ⅰ11. A first-level spray tower 9 connected to the water tank body 10 is provided at the upper end of the water tank body 10, an exhaust pipe 5 is provided at the upper end of the first-level spray tower 9, an enhanced heat exchange component 8 is provided in the middle of the first-level spray tower 9, an exhaust pipe 1 connected to the first-level spray tower 9 is provided on the outer side of the first-level spray tower 9, a heat exchanger Ⅰ2 connected to the first-level spray tower 9 and the water tank body 10 is provided between the exhaust pipe 1 and the first-level spray tower 9, a drain pipe 13 connected to the heat exchanger Ⅰ2 is provided at the lower end of the heat exchanger Ⅰ2, and a drain pump 15 is provided between the drain pipe 13 and the heat exchanger Ⅰ2. A waste steam delivery pipe 3 connected to the lower part of the enhanced heat exchanger 8 is provided between the heat exchanger Ⅰ2 and the first-level spray tower 9, and a regulating valve 4 is provided on the waste steam delivery pipe 3. A second-level spray tower 23 connected to the first-level spray tower 9 and the water tank body 10 is provided on the side of the first-level spray tower 9, an exhaust pipe 5 is provided at the upper end of the second-level spray tower 23, an enhanced heat exchanger 8 is provided in the middle of the second-level spray tower 23, a nozzle spray pipe 7 is provided between the enhanced heat exchanger 8 and the exhaust pipe 5, and a dehydrator 6 is provided between the nozzle spray pipe 7 and the exhaust pipe 5. A steam-water separator 22 connected to the water tank body 10 is provided between the second-level spray tower 23 and the first-level spray tower 9, and the steam-water separator 22 is connected to the lower part of the second-level spray tower 23, and the steam-water separator 22 is connected to the upper end of the first-level spray tower 9 by pipeline.

[0024] A heat exchanger II16 connected by pipeline is provided between the heat exchanger I2 and the water tank body 10, and a heat exchanger III17 is provided between the heat exchanger II16 and the nozzle spray pipe 7 in the first-level spray tower 9. A device to be heated 20 connected by pipeline to the heat exchanger I2 is provided outside the heat exchanger I2, and a secondary water tank 21 connected by pipeline to the heat exchanger I2 and the heat exchanger II16 is provided between the heat exchanger I2 and the device to be heated 20. A first-level water tank 18 connected by pipeline to the heat exchanger II16 and the heat exchanger III17 is provided between the heat exchanger II16 and the heat exchanger III17, and a water supply pump II19 connected by pipeline to the first-level water tank 18 is provided on the side of the first-level water tank 18. Water pumps 14 connected by pipelines are provided between the heat supply equipment 20 and the secondary water tank 21, between the secondary water tank 21 and the heat exchanger II 16, between the heat exchanger II 16 and the water tank body 10, between the primary water tank 18 and the heat exchanger II 16, and between the primary water tank 18 and the heat exchanger III 17.

[0025] In summary, the waste steam heat energy recovery structure using three-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.

[0026] 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.

[0027] 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 three-stage heat exchange treatment, characterized by: The invention comprises a water tank body (10), wherein the upper end of the water tank body (10) is provided with a first-stage spray tower (9) connected to the water tank body (10), the upper end of the first-stage spray tower (9) is provided with an exhaust pipe (5), the middle part of the first-stage spray tower (9) is provided with an enhanced heat exchange component (8), the outer side of the first-stage spray tower (9) is provided with an exhaust pipe (1) connected to the first-stage spray tower (9), a heat exchanger I (2) connected to the first-stage spray tower (9) and the water tank body (10) is provided between the exhaust pipe (1) and the first-stage spray tower (9), and a waste steam conveying pipe (3) connected to the lower side of the enhanced heat exchange component (8) is provided between the heat exchanger I (2) and the first-stage spray tower (9).

2. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 1 is characterized in that: A secondary spray tower (23) is provided on the side of the primary spray tower (9) and is connected to the primary spray tower (9) and the water tank body (10). An exhaust pipe (5) is provided at the upper end of the secondary spray tower (23). An enhanced heat exchange component (8) is provided in the middle of the secondary spray tower (23). A nozzle spray pipe (7) is provided between the enhanced heat exchange component (8) and the exhaust pipe (5). A dehydrator (6) is provided between the nozzle spray pipe (7) and the exhaust pipe (5).

3. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 2 is characterized in that: A steam-water separator (22) connected to the water tank body (10) is provided between the secondary spray tower (23) and the primary spray tower (9). The steam-water separator (22) is connected to the lower part of the secondary spray tower (23) and the upper end of the primary spray tower (9) through pipelines.

4. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 2 is characterized in that: A heat exchanger II (16) is provided between the heat exchanger I (2) and the water tank body (10) and is connected to the water tank body (10) through a pipeline. A heat exchanger III (17) is provided between the heat exchanger II (16) and the nozzle spray pipe (7) in the first-stage spray tower (9).

5. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 4 is characterized in that: The heat exchanger I (2) is provided with a device to be heated (20) on the outside thereof and is connected to the heat exchanger I (2) via a pipeline. A secondary water tank (21) is provided between the heat exchanger I (2) and the device to be heated (20) and is connected to the heat exchanger I (2) and the heat exchanger II (16) via a pipeline in parallel. A primary water tank (18) is provided between the heat exchanger II (16) and the heat exchanger III (17) and is connected to the heat exchanger II (16) and the heat exchanger III (17) via a pipeline in parallel. A water supply pump II (19) is provided on the side of the primary water tank (18) and is connected to the primary water tank (18) via a pipeline.

6. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 5 is characterized in that: Water pumps (14) connected to each other by pipelines are provided between the equipment to be heated (20) and the secondary water tank (21), between the secondary water tank (21) and the heat exchanger II (16), between the heat exchanger II (16) and the water tank body (10), between the primary water tank (18) and the heat exchanger II (16), and between the primary water tank (18) and the heat exchanger III (17).

7. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 1 is characterized in that: The lower end of the heat exchanger I (2) is provided with a drainage pipe (13) connected to the heat exchanger I (2), and a drain pump (15) is provided between the drainage pipe (13) and the heat exchanger I (2).

8. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 1 is characterized in that: The waste steam delivery pipe (3) is provided with a regulating valve (4).

9. The waste steam heat energy recovery structure using three-stage heat exchange treatment according to claim 1 is characterized in that: A water supply pump I (11) connected to the upper part of the water tank body (10) through a pipeline is provided on one side of the water tank body (10), and an overflow pipe (12) connected to the water tank body (10) through a pipeline is provided below the water supply pump I (11).

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