Device for eliminating secondary flash steam

Abstract

The utility model discloses a device for eliminating secondary flash steam, which comprises a water return tank, a first heat exchanger, a cold source water supply end and a workshop heat source, a recovery pipeline is connected between the water return tank and the workshop heat source, and the first heat exchanger is arranged above the water return tank. A steam path pipeline and a condensation pipeline are connected between the top end of the water return tank and the bottom end of the first heat exchanger; a first cold source pipeline is connected between the first heat exchanger and the cold source water supply end; after high-temperature condensed water enters the water return tank, secondary flash steam generated due to pressure reduction enters the first heat exchanger for heat exchange, is converted into condensed water and flows back to the water return tank, so that the secondary flash steam is effectively eliminated, and the core advantage is that the recovery and utilization efficiency of energy is remarkably improved; the high-altitude emission of the secondary flash steam is reduced, the influence on the factory environment and the visual aesthetic degree is reduced, and the factory image is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of steam recovery, in particular to a device for eliminating secondary flash steam. Background Art

[0002] Steam is a common heat energy carrier in industrial production. It is transported through pipelines in the workshop to a dehumidification unit for heating and regeneration, which is an integral part of the industrial production process. During this process, steam releases its heat energy and then condenses into high-temperature condensate. The recovery and reuse of condensate are important measures to improve energy efficiency and reduce energy waste.

[0003] In related technologies, condensate is usually recovered using an open recovery system, and the generated secondary flash steam is discharged into the air at high altitude. This results in some energy not being effectively utilized, causing energy waste.

[0004] Furthermore, the steam discharged at high altitude will affect the visual environment of the factory area, reduce the aesthetic degree of the factory area, and affect the image of the factory area. Summary of the Utility Model

[0005] In order to solve the above problems, the utility model provides a device for eliminating secondary flash steam to solve this problem.

[0006] To achieve the above object, the present application provides the following technical solutions:

[0007] A device for eliminating secondary flash steam includes a return water tank, a first heat exchanger, a cold source water supply end, and a workshop heat source. A recovery pipeline is connected between the return water tank and the workshop heat source. The first heat exchanger is arranged above the return water tank, and a steam pipeline and a condensation pipeline are connected between the top end of the return water tank and the bottom end of the first heat exchanger. A first cold source pipeline is connected between the first heat exchanger and the cold source water supply end.

[0008] It is further set that: it also includes a boiler room, a second heat exchanger, and a heat source water outlet end connected to the cold source water supply end. The first heat exchanger and the second heat exchanger are arranged in parallel with respect to the return water tank. Two groups of parallel pressure pipelines are connected between the bottom end of the return water tank and the second heat exchanger. High-temperature water pumps are arranged on both groups of the pressure pipelines. A circulation pipeline is connected between the second heat exchanger and the boiler room.

[0009] It is further set that: a first electric control valve group and a first stop valve arranged in parallel with the first electric control valve group are arranged on the first cold source pipeline.

[0010] It is further set that: a second electric control valve group and a second stop valve arranged in parallel with the second electric control valve group are arranged on the circulation pipeline.

[0011] Further set as: third stop valves are provided on the recovery pipeline, the second cold source pipeline, the first heat source pipeline, and the second heat source pipeline.

[0012] Further set as: a first temperature sensor is provided at the head end of the first heat source pipeline, and a second temperature sensor is provided at the head end of the second heat source pipeline.

[0013] Further set as: a water level sensor is provided in the return water tank.

[0014] Further set as: the high-temperature water pump is a variable-frequency water pump.

[0015] Further set as: both the first electric control valve group and the second electric control valve group are composed of a plurality of control valves connected in series.

[0016] Further set as: further includes a controller coupled to the first electric control valve group, the second electric control valve group, and the high-temperature water pump, and the controller is simultaneously signal-connected to the water level sensor, the first temperature sensor, and the second temperature sensor.

[0017] Compared with the prior art, the beneficial technical effects of the present utility model are:

[0018] After the high-temperature condensate enters the return water tank in the present utility model, the secondary flash steam generated due to the pressure reduction enters the first heat exchanger for heat exchange, is converted into condensate and flows back to the return water tank, effectively eliminating the secondary flash steam, reducing the high-altitude emission of the secondary flash steam, reducing the impact on the factory area environment and visual aesthetics, and enhancing the factory area image; furthermore, the present utility model recovers the heat of the flash steam and high-temperature condensate through the first and second heat exchangers, improving the energy utilization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0020] Figure 1 It is a schematic diagram of the principle of the present utility model.

[0021] Reference numerals: 1, return water tank; 2, first heat exchanger; 3, second heat exchanger; 4, cold source water supply end; 5, heat source water outlet end; 6, workshop heat source; 7, recovery pipeline; 8, steam pipeline; 9, condensate pipeline; 10, pressurization pipeline; 11, high-temperature water pump; 12, first cold source pipeline; 13, first electric control valve group; 14, first stop valve; 15, second cold source pipeline; 16, first heat source pipeline; 17, second heat source pipeline; 18, circulation pipeline; 19, second electric control valve group; 20, second stop valve; 21, third stop valve; 22, first temperature sensor; 23, second temperature sensor; 24, boiler house. Detailed implementation manners

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0024] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] Embodiment

[0026] Refer to Figure 1, a device for eliminating secondary flash steam disclosed by the present utility model, includes a return water tank 1, a first heat exchanger 2, a second heat exchanger 3, a cold source water supply end 4, a workshop heat source 6, a boiler room 24, and a heat source water outlet end 5 connected to the cold source water supply end 4. Among them, the first heat exchanger 2 and the second heat exchanger 3 are arranged in parallel with respect to the return water tank 1. A recovery pipeline 7 is connected between the return water tank 1 and the workshop heat source 6. The high-temperature condensate generated by the workshop heat source 6 enters the return water tank 1 through the recovery pipeline 7;

[0027] The first heat exchanger 2 is arranged above the return water tank 1. An air pipeline 8 and a condensate pipeline 9 are connected between the top end of the return water tank 1 and the bottom end of the first heat exchanger 2. After the high-temperature condensate enters the return water tank 1 through the recovery pipeline 7, due to the sudden increase in the space inside the return water tank 1, the pressure of the high-temperature condensate instantaneously decreases, generating a large amount of secondary flash steam. The secondary flash steam enters the first heat exchanger 2 through the air pipeline 8. After the secondary flash steam exchanges heat with the first heat exchanger 2, it is re-condensed into condensate and flows back to the return water tank 1 under the action of gravity through the condensate pipeline 9;

[0028] Two groups of parallel pressure pipelines 10 are connected between the bottom end of the return water tank 1 and the second heat exchanger 3. High-temperature water pumps 11 are arranged on both groups of the pressure pipelines 10. A circulation pipeline 18 is connected between the second heat exchanger 3 and the boiler room 24. The condensate in the return water tank 1 is pumped into the second heat exchanger 3 by the high-temperature water pump 11. The condensate exchanges heat with the second heat exchanger 3, and the condensate is sent to the boiler room 24 after being cooled down.

[0029] In this embodiment, the cold source water supply end 4 exchanges heat with the first heat exchanger 2 to absorb the heat of the secondary flash steam, and the cold source water supply end 4 exchanges heat with the second heat exchanger 3 to absorb the heat of the condensate pumped out from the return water tank 1;

[0030] Specifically, a first cold source pipeline 12 is connected between the cold source water supply end 4 and the first heat exchanger 2, and a second cold source pipeline 15 is connected between the cold source water supply end 4 and the second heat exchanger 3; the first cold source pipeline 12 and the second cold source pipeline 15 are arranged in parallel;

[0031] A first heat source pipeline 16 is connected between the first heat exchanger 2 and the heat source water outlet end 5, and a second heat source pipeline 17 is connected between the second heat exchanger 3 and the heat source water outlet end 5.

[0032] Further, a first electric control valve group 13 and a first stop valve 14 arranged in parallel with the first electric control valve group 13 are provided on the first cold source pipeline 12; a second electric control valve group 19 and a second stop valve 20 arranged in parallel with the second electric control valve group 19 are provided on the circulation pipeline 18; under normal conditions, the first stop valve 14 and the second stop valve 20 are in a closed state. When the first electric control valve group 13 is under maintenance, the first stop valve 14 is opened to keep the pipeline unobstructed; when the second electric control valve group 19 is under maintenance, the second stop valve 20 is opened to keep the pipeline unobstructed.

[0033] Further, third stop valves 21 are provided on the recovery pipeline 7, the second cold source pipeline 15, the first heat source pipeline 16, and the second heat source pipeline 17.

[0034] Further, a first temperature sensor 22 is provided at the head end of the first heat source pipeline 16, and a second temperature sensor 23 is provided at the head end of the second heat source pipeline 17.

[0035] Further, a water level sensor (not shown in the figure) is provided in the return water tank 1. The present utility model further includes a controller coupled to the first electric control valve group 13, the second electric control valve group 19, and the high-temperature water pump 11. The controller is used for opening and closing the first electric control valve group 13, the second electric control valve group 19, and the high-temperature water pump 11. The controller is simultaneously signal-connected to the water level sensor, the first temperature sensor 22, and the second temperature sensor 23.

[0036] Wherein, when the pipeline temperature measured by the first temperature sensor 22 is greater than the set value, the controller increases the opening degree of the first electric control valve group 13, and vice versa; when the pipeline temperature measured by the second temperature sensor 23 is greater than the set value, the controller increases the opening degree of the second electric control valve group 19, and vice versa.

[0037] In this embodiment, both the first electric control valve group 13 and the second electric control valve group 19 are composed of multiple series-connected control valves.

[0038] In this embodiment, the first heat exchanger 2 is a tubular heat exchanger, the second heat exchanger 3 is a water-water plate heat exchanger, and the cold source water supply end 4 is the medium to be heated in the workshop.

[0039] In this embodiment, the return water tank 1 is preferably made of stainless steel to reduce the corrosion effect of condensate.

[0040] In this embodiment, the high-temperature water pump 11 is a variable-frequency water pump. When the water level sensor measures that the water level in the return water tank 1 is higher than the set value, the controller increases the motor speed of the high-temperature water pump 11, and vice versa.

[0041] The working principle and beneficial effects of the present utility model are as follows:

[0042] The cold source water supply end 4 supplies cooling to the first heat exchanger 2 through the first cold source pipeline 12, and the cold source water supply end 4 supplies cooling to the second heat exchanger 3 through the second cold source pipeline 15; the high-temperature condensate water from the workshop heat source 6 enters the return water tank 1 through the recovery pipeline 7. Due to the pressure reduction, a large amount of secondary flash steam is generated. The secondary flash steam enters the first heat exchanger 2 through the steam pipeline 8. After the secondary flash steam exchanges heat with the first heat exchanger 2, it is re-condensed into condensate water and flows back into the return water tank 1 under the action of gravity through the condensate pipeline 9;

[0043] The high-temperature water pump 11 pumps the condensate water in the return water tank 1 into the second heat exchanger 3. The condensate water exchanges heat with the second heat exchanger 3 and is sent back to the workshop heat source 6 after being cooled;

[0044] After heat exchange, the internal cold water of the first heat exchanger 2 warms up and finally flows to the heat source water outlet end 5 through the first heat source pipeline 16. After heat exchange, the internal cold water of the second heat exchanger 3 warms up and finally flows to the heat source water outlet end 5 through the second heat source pipeline 17.

[0045] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present utility model.

Claims

1. A device for eliminating secondary flash steam, characterized in that: The invention comprises a return water tank (1), a first heat exchanger (2), a cold source water supply end (4) and a workshop heat source (6); a recovery pipeline (7) is connected between the return water tank (1) and the workshop heat source (6); the first heat exchanger (2) is arranged above the return water tank (1); a steam pipeline (8) and a condensation pipeline (9) are connected between the top end of the return water tank (1) and the bottom end of the first heat exchanger (2); and a first cold source pipeline (12) is connected between the first heat exchanger (2) and the cold source water supply end (4).

2. A device for eliminating secondary flash steam according to claim 1, characterized in that: It also includes a boiler room (24), a second heat exchanger (3), and a heat source water outlet (5) connected to a cold source water supply end (4); two groups of pressurized pipelines (10) arranged in parallel are connected between the bottom end of the return water tank (1) and the second heat exchanger (3); high-temperature water pumps (11) are arranged on the two groups of pressurized pipelines (10); and a circulation pipeline (18) is connected between the second heat exchanger (3) and the boiler room (24).

3. A device for eliminating secondary flash steam according to claim 2, characterized in that: The first cold source pipeline (12) is provided with a first electric regulating valve group (13) and a first stop valve (14) arranged in parallel with the first electric regulating valve group (13).

4. A device for eliminating secondary flash steam according to claim 3, characterized in that: The circulation pipeline (18) is provided with a second electric regulating valve group (19) and a second stop valve (20) arranged in parallel with the second electric regulating valve group (19).

5. A device for eliminating secondary flash steam according to claim 4, characterized in that: The recovery pipeline (7), the second cold source pipeline (15), the first heat source pipeline (16) and the second heat source pipeline (17) are all provided with a third stop valve (21).

6. A device for eliminating secondary flash steam according to claim 5, characterized in that: A first temperature sensor (22) is provided at the head end of the first heat source pipeline (16), and a second temperature sensor (23) is provided at the head end of the second heat source pipeline (17).

7. A device for eliminating secondary flash steam according to claim 6, characterized in that: A water level sensor is arranged in the return water tank (1).

8. The device for eliminating secondary flash steam according to claim 7, characterized in that: The high-temperature water pump (11) is a variable frequency water pump.

9. The device for eliminating secondary flash steam according to claim 8, characterized in that: The first electric regulating valve group (13) and the second electric regulating valve group (19) are both composed of a plurality of regulating valves arranged in series.

10. The device for eliminating secondary flash steam according to claim 9, characterized in that: It also includes a controller coupled to the first electric regulating valve group (13), the second electric regulating valve group (19) and the high-temperature water pump (11), and the controller is simultaneously connected to the water level sensor, the first temperature sensor (22) and the second temperature sensor (23) for signals.

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