Deaerator dead steam recovery device

Abstract

The utility model discloses a dead steam recovery device for a deaerator, relates to the related field of deaerators, and aims to solve the problems that in the prior art, a circulating water tank and a water collecting tank have repeated functions, water in the water collecting tank is basically used for supplementing water for a heat exchanger after being cooled or is directly used for supplementing water for the deaerator, although heat energy is recovered, the water cannot be recycled. However, each waterway channel is increased, so that the complexity of the whole heat energy recovery system is increased. An outer sleeve is fixed to the upper end of the interior of the dead steam recycling tank and comprises a first outer barrel body, a stepped inward-contracting edge, a second outer barrel body and a fixed sealing bottom, the first outer barrel body, the stepped inward-contracting edge, the second outer barrel body and the fixed sealing bottom are arranged from top to bottom, and liquid outlet holes are formed in the fixed sealing bottom in an annular array mode; a first dead steam distribution pipe is arranged in the dead steam recovery tank along the interior of the first outer barrel, and a second dead steam distribution pipe is arranged in the dead steam recovery tank along the interior of the second outer barrel.

Description

Technical Field

[0001] The utility model relates to the field of deaerators, in particular to a deaerator exhaust steam recovery device. Background Art

[0002] The exhaust steam recovery device for deaerator is an energy-saving product. It advocates energy conservation and consumption reduction. Based on the jet-type mixed heater and steam jet heat pump with water jet extraction, a set of exhaust steam recovery device for deaerator is designed. Users can easily install the exhaust steam recovery device for deaerator above the deaerator to recover the flash steam in the form of hot water or steam. The exhaust steam recovery device for deaerator is conducive to environmental protection and the implementation of energy conservation and consumption reduction.

[0003] For example, the Chinese authorized patent with announcement number CN 209326398 (deaerator exhaust steam recovery device) includes a first deaerator and a second deaerator, one end of the first deaerator and the second deaerator are connected to a heat recovery component, the heat recovery component includes a first heat exchanger, a first circulating water tank, a second heat exchanger and a second circulating water tank, the top of the first deaerator is connected to the first heat exchanger through a gas transmission pipeline; an exhaust steam recovery device is additionally provided at one end of the deaerator, the heat exchanger in the recovery device can exchange heat with the exhaust steam to reduce the heat in the exhaust steam, the heat in the exhaust steam is absorbed by the water in the circulating water tank, the heat can be collected and utilized, the liquid after the exhaust steam is condensed will be sent to the water collecting tank through the pipeline, so as to facilitate the reuse of the water in the exhaust steam, the recovery device effectively recovers the exhaust steam, comprehensively utilizes resources, and reduces environmental emission pollution.

[0004] Although the above-mentioned prior art has the function of recovering the heat energy of the exhaust steam of the deaerator, there is duplication of functions between the circulating water tank and the water collecting tank. The water in the water collecting tank is basically used for replenishing the heat exchanger after cooling or directly for replenishing the deaerator. Although the heat energy can be recovered, the number of water channels is increased, which increases the complexity of the entire heat recovery system. Utility Model Content

[0005] The purpose of the utility model is to provide a deaerator exhaust steam recovery device to solve the problem that there is duplication of functions between the circulating water tank and the water collecting tank proposed in the above background technology. The water in the water collecting tank is basically used for replenishing water for the heat exchanger after cooling or directly for replenishing water for the deaerator. Although the heat energy can be recovered, the number of water channels is increased, which increases the complexity of the entire heat energy recovery system.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a deaerator exhaust steam recovery device, comprising an exhaust steam recovery tank, an outer sleeve is fixed to the upper end of the exhaust steam recovery tank, the outer sleeve comprises a first outer cylinder, a stepped inward edge, a second outer cylinder and a fixed bottom seal, the first outer cylinder, the stepped inward edge, the second outer cylinder and the fixed bottom seal are arranged from top to bottom, and a liquid outlet hole is opened in an annular array on the fixed bottom seal;

[0007] A first exhaust steam distribution pipe is arranged inside the first outer cylinder along the inner side of the exhaust steam recovery tank, a second exhaust steam distribution pipe is arranged inside the second outer cylinder along the inner side of the exhaust steam recovery tank, the second exhaust steam distribution pipe and the inner side of the second outer cylinder form an exhaust steam channel, and a heat exchange cavity is formed between the second exhaust steam distribution pipe and the second outer cylinder and between the first outer cylinder and the first exhaust steam distribution pipe;

[0008] The first exhaust steam distribution pipe and the second exhaust steam distribution pipe each include a plurality of inclined pipe bodies, each of which is provided with an exhaust hole, the exhaust hole being arranged to be inclined downward, and the exhaust hole being connected to the heat exchange cavity and the exhaust steam channel;

[0009] A waste steam heat recovery component is arranged inside the waste steam recovery tank along the outside of the outer sleeve. The waste steam heat recovery component includes a liquid nozzle. The liquid nozzles are arranged in multiple groups, and each group of multiple liquid nozzles is arranged in a circular array. The liquid nozzles pass through the outer sleeve and extend to the inside of the heat exchange cavity.

[0010] Preferably, the first exhaust steam distribution pipe and the second exhaust steam distribution pipe also include a connecting outer edge, which is located at the upper end of the uppermost inclined tube body and is connected to the outer sleeve. A blocking inner edge is arranged between two adjacent inclined tube bodies, and the blocking inner edge is arranged horizontally. The lowermost inclined tube body on the second exhaust steam distribution pipe is fixed to the fixed bottom cover.

[0011] Preferably, a liquid delivery main pipe is provided on the outer side of the exhaust steam recovery tank, and a first distribution pipe is connected to the liquid delivery main pipe through a tee, a second end of the first distribution pipe is connected to a second distribution pipe, and a third end of the first distribution pipe is connected to a third distribution pipe.

[0012] Preferably, first outer annular delivery pipes are equidistantly arranged on the outside of the first outer cylinder from top to bottom, and a plurality of the first outer annular delivery pipes are connected to the output end of the second distribution pipe. Second outer annular delivery pipes are equidistantly arranged on the outside of the second outer cylinder from top to bottom, and the second outer annular delivery pipes are connected to the output end of the third distribution pipe. The liquid nozzle is installed in the first outer annular delivery pipe and the second outer annular delivery pipe and is connected to the first outer annular delivery pipe and the second outer annular delivery pipe.

[0013] Preferably, an external fixed tube is welded and fixed to the lower end of the fixed bottom seal along the outside of the liquid outlet, the outside of the external fixed tube is connected to an external fixed ring through an arc-shaped connecting tube, the outside of the external fixed ring is fixed with an arc-shaped upward ring, the end of the arc-shaped upward ring is arranged upward, and the inner side of the exhaust steam recovery tank along the external fixed tube, the arc-shaped connecting tube, the external fixed ring and the lower end of the arc-shaped upward ring are arranged as a hot water concentration chamber.

[0014] Preferably, the inner edge of the exhaust steam recovery tank is arranged as a non-condensable gas chamber outside the outer sleeve, and a non-condensable gas discharge pipe is installed on one side of the upper end of the exhaust steam recovery tank, and the non-condensable gas discharge pipe is connected with the inside of the non-condensable gas chamber.

[0015] Preferably, a waste steam inlet pipe is installed at the upper end of the waste steam recovery tank, and the lower end of the waste steam inlet pipe extends into the waste steam recovery tank and is connected to a jet pipe.

[0016] Preferably, a supporting leg array is installed at the lower end of the exhaust steam recovery tank, a hot water discharge pipe is installed at the lower end of the exhaust steam recovery tank, the hot water discharge pipe is connected to the inside of the hot water concentration cavity, and a control valve is installed on the hot water discharge pipe.

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

[0018] 1. In the utility model, exhaust steam enters the first exhaust steam distribution pipe, the water supply pipe of the deaerator is connected to the liquid delivery main pipe, the water supply is sprayed out through the liquid nozzle, and the liquid and the exhaust steam are mixed for the first time; then the liquid and the exhaust steam mixture and the exhaust steam that has not contacted with the liquid in the first exhaust steam distribution pipe enter the second exhaust steam distribution pipe, the water supply is sprayed out through the liquid nozzle, and the exhaust steam and the liquid are mixed; then the mixture is discharged downward through the liquid outlet hole, the heat in the exhaust steam heats the liquid and is concentrated in the hot water concentration chamber, and then the heated liquid is passed into the deaerator for water supply. Since the make-up water itself has a certain temperature, the heating time of the make-up water can be reduced, and the device is only connected to the deaerator make-up water pipeline, and the exhaust steam output pipeline is connected to the device, which can not only recover the exhaust steam, but also will not increase the water circulation in the middle too much, thus solving the function duplication of the circulating water tank and the water collecting tank. The water in the water collecting tank is basically used for make-up water of the heat exchanger after cooling or directly for make-up water of the deaerator. Although the heat energy can be recovered, the number of water channels is increased, which increases the complexity of the entire heat recovery system.

[0019] 2. In the utility model, the exhaust steam enters the first exhaust steam distribution pipe and the second exhaust steam distribution pipe. Due to the existence of the blocking inner edge on the first exhaust steam distribution pipe and the second exhaust steam distribution pipe, the exhaust steam is distributed step by step and enters the heat exchange chamber through the exhaust holes on the inclined pipe body corresponding to the upper end of the blocking inner edge, and does not flow directly downward, so that the liquid sprayed from the liquid nozzle and the exhaust steam can be mixed with the maximum efficiency for heat recovery.

[0020] 3. In the utility model, the first exhaust steam distribution pipe and the second exhaust steam distribution pipe are provided. Compared with a double exhaust steam distribution pipe of the entire height, the exhaust steam distribution pipe can reduce the height of the entire structure while increasing the contact area between the exhaust steam and the water mist sprayed from the outside of the exhaust steam distribution pipe, further improving the exhaust steam heat energy recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a front view of a deaerator exhaust steam recovery device of the utility model;

[0022] Figure 2 This is a front view of a deaerator exhaust steam recovery device of the utility model;

[0023] Figure 3 This is a top view of a deaerator exhaust steam recovery device of the utility model;

[0024] Figure 4 This is a structural cross-sectional view of the AA position of a deaerator exhaust steam recovery device of the utility model;

[0025] Figure 5 It is a structural schematic diagram of an exhaust steam heat recovery component of a deaerator exhaust steam recovery device of the utility model;

[0026] Figure 6 It is a structural schematic diagram of a first exhaust steam distribution pipe and a second exhaust steam distribution pipe of a deaerator exhaust steam recovery device of the utility model.

[0027] In the figure: 1. Exhaust steam recovery tank; 2. Support legs; 3. Hot water discharge pipe; 4. Control valve; 5. Exhaust steam inlet pipe; 6. Jet pipe; 7. Outer sleeve; 8. First outer cylinder; 9. Stepped inner edge; 10. Second outer cylinder; 11. Fixed bottom seal; 12. Liquid outlet; 13. External fixed pipe; 14. External fixed ring; 15. Arc-shaped upward ring; 16. Hot water concentration chamber; 17. Non-condensable gas chamber; 18. Non-condensable gas discharge pipe; 19. First exhaust steam distribution pipe; 20, second exhaust steam distribution pipe; 21, connecting outer edge; 22, inclined pipe body; 23, blocking inner edge; 24, exhaust hole; 25, exhaust steam channel; 26, exhaust steam heat recovery component; 27, liquid delivery main pipe; 28, first distribution pipe; 29, second distribution pipe; 30, first outer annular delivery pipe; 31, third distribution pipe; 32, second outer annular delivery pipe; 33, liquid nozzle; 34, heat exchange chamber. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] See also Figure 1-6The utility model provides an embodiment: a deaerator exhaust steam recovery device, including an exhaust steam recovery tank 1, an array of support legs 2 are installed at the lower end of the exhaust steam recovery tank 1, an outer sleeve 7 is fixed at the upper end of the exhaust steam recovery tank 1, a non-condensable gas chamber 17 is arranged along the outer side of the outer sleeve 7 inside the exhaust steam recovery tank 1, a non-condensable gas discharge pipe 18 is installed at one side of the upper end of the exhaust steam recovery tank 1, and the non-condensable gas discharge pipe 18 is communicated with the inside of the non-condensable gas chamber 17; an exhaust steam inlet pipe 5 is installed at the upper end of the exhaust steam recovery tank 1, and the lower end of the exhaust steam inlet pipe 5 extends into the exhaust steam recovery tank 1 and is connected with a jet pipe 6.

[0030] The outer sleeve 7 includes a first outer cylinder 8, a stepped inward edge 9, a second outer cylinder 10 and a fixed bottom seal 11. The first outer cylinder 8, the stepped inward edge 9, the second outer cylinder 10 and the fixed bottom seal 11 are arranged from top to bottom. The fixed bottom seal 11 is provided with liquid outlet holes 12 in an annular array.

[0031] A first exhaust steam distribution pipe 19 is arranged inside the first outer cylinder 8 of the exhaust steam recovery tank 1, and a second exhaust steam distribution pipe 20 is arranged inside the second outer cylinder 10 of the exhaust steam recovery tank 1. Compared with a high exhaust steam distribution pipe and a large diameter at the top, the contact area between the exhaust steam and the water mist sprayed from the outside of the exhaust steam distribution pipe can be reduced while the overall structural size is increased; the second exhaust steam distribution pipe 20 and the inside of the second outer cylinder 10 form an exhaust steam channel 25, and a heat exchange cavity 34 is formed between the second exhaust steam distribution pipe 20 and the second outer cylinder 10 and between the first outer cylinder 8 and the first exhaust steam distribution pipe 19;

[0032] The first exhaust steam distribution pipe 19 and the second exhaust steam distribution pipe 20 both include a plurality of inclined pipe bodies 22. The first exhaust steam distribution pipe 19 and the second exhaust steam distribution pipe 20 also include a connecting outer edge 21. The connecting outer edge 21 is located at the upper end of the uppermost inclined pipe body 22, and the connecting outer edge 21 is connected to the outer sleeve 7. A blocking inner edge 23 is arranged between two adjacent inclined pipe bodies 22. The blocking inner edge 23 is arranged horizontally. When the exhaust steam passes through, it is distributed step by step. The lowermost inclined pipe body 22 on the second exhaust steam distribution pipe 20 is fixed to the fixed bottom cover 11. An exhaust hole 24 is opened on the inclined pipe body 22. The exhaust hole 24 is arranged downwardly and inclined. The exhaust steam is sprayed downward and contacts with the horizontally sprayed water mist for fusion. The exhaust hole 24 communicates with the heat exchange cavity 34 and the exhaust steam channel 25.

[0033] A waste steam heat recovery assembly 26 is arranged inside the waste steam recovery tank 1 along the outside of the outer sleeve 7. The waste steam heat recovery assembly 26 includes a liquid nozzle 33. The liquid nozzle 33 is provided with multiple groups, and each group of multiple liquid nozzles 33 is arranged in a circular array. The liquid nozzle 33 passes through the outer sleeve 7 and extends to the inside of the heat exchange cavity 34.

[0034] An external fixed tube 13 is welded and fixed to the lower end of the fixed bottom cover 11 along the outside of the liquid outlet 12, and an external fixed tube 13 is connected to the outside of the external fixed tube 13 through an arc-shaped connecting tube. An arc-shaped upward ring 15 is fixed to the outside of the external fixed ring 14, and the end of the arc-shaped upward ring 15 is arranged upward to guide the non-condensable gas upward for discharge. A hot water concentration chamber 16 is arranged inside the exhaust steam recovery tank 1 along the lower ends of the external fixed tube 13, the arc-shaped connecting tube, the external fixed ring 14 and the arc-shaped upward ring 15, and a hot water discharge pipe 3 is installed at the lower end of the exhaust steam recovery tank 1. The hot water discharge pipe 3 is connected to the inside of the hot water concentration chamber 16, and a control valve 4 is installed on the hot water discharge pipe 3.

[0035] Further, a liquid delivery main pipe 27 is provided on one side of the outside of the exhaust steam recovery tank 1, and a first distribution pipe 28 is connected to the liquid delivery main pipe 27 through a tee, a second end of the first distribution pipe 28 is connected to a second distribution pipe 29, and a third end of the first distribution pipe 28 is connected to a third distribution pipe 31, and first outer annular delivery pipes 30 are equidistantly provided on the outside of the first outer cylinder 8 from top to bottom, and a plurality of first outer annular delivery pipes 30 are connected to the output end of the second distribution pipe 29, and second outer annular delivery pipes 32 are equidistantly provided on the outside of the second outer cylinder 10 from top to bottom. The second outer annular delivery pipe 32 is connected to the output end of the third distribution pipe 31, and the liquid nozzle 33 is installed in the first outer annular delivery pipe 30 and the second outer annular delivery pipe 32 and is connected with the first outer annular delivery pipe 30 and the second outer annular delivery pipe 32; the replenishing water reaches the first outer annular delivery pipe 30 through the liquid delivery main pipe 27, the first distribution pipe 28 and the second distribution pipe 29, or the replenishing water reaches the second outer annular delivery pipe 32 through the liquid delivery main pipe 27, the first distribution pipe 28 and the third distribution pipe 31, and is sprayed out through the liquid nozzle 33.

[0036] Working principle: Exhaust steam enters the exhaust steam inlet pipe 5 through the pipeline between the deaerator and the recovery device, and is ejected through the jet pipe 6.

[0037] The exhaust steam enters the first exhaust steam distribution pipe 19. Due to the existence of the blocking inner edge 23 on the first exhaust steam distribution pipe 19, the exhaust steam is distributed step by step, and enters the upper heat exchange chamber 34 through the exhaust hole 24 on the inclined pipe body 22, and connects the water supply pipe of the deaerator to the liquid delivery main pipe 27. The water supply reaches the first outer annular delivery pipe 30 through the liquid delivery main pipe 27, the first distribution pipe 28 and the second distribution pipe 29, and is sprayed out through the liquid nozzle 33, and the liquid is mixed with the exhaust steam.

[0038] The mixture of liquid and exhaust steam and the exhaust steam that has not come into contact with the liquid in the first exhaust steam distribution pipe 19 enter the second exhaust steam distribution pipe 20; due to the existence of the blocking inner edge 23 on the second exhaust steam distribution pipe 2, the exhaust steam is distributed step by step, and enters the lower-stage heat exchange chamber 34 through the exhaust holes 24 on the inclined tube body 22, and the replenishing water reaches the second outer annular delivery pipe 32 through the liquid delivery main pipe 27, the first distribution pipe 28 and the third distribution pipe 31, and is sprayed out through the liquid nozzle 33, and the exhaust steam is mixed with the liquid.

[0039] The mixture is then discharged downward through the liquid outlet 12, and the non-condensable gas flows upward along the external fixed tube 13, the external fixed ring 14 and the arc-shaped upward ring 15, and is discharged through the non-condensable gas discharge pipe 18; the heat in the exhaust steam heats the liquid and is concentrated in the hot water concentration chamber 16, and then the heated liquid is passed into the deaerator for water replenishment.

[0040] 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 spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-limiting from any point of view, 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 numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A deaerator exhaust steam recovery device, comprising an exhaust steam recovery tank (1), characterized in that: An outer sleeve (7) is fixed to the upper end of the exhaust steam recovery tank (1), and the outer sleeve (7) comprises a first outer cylinder (8), a stepped inward edge (9), a second outer cylinder (10) and a fixed bottom seal (11). The first outer cylinder (8), the stepped inward edge (9), the second outer cylinder (10) and the fixed bottom seal (11) are arranged from top to bottom, and a liquid outlet hole (12) is provided in an annular array on the fixed bottom seal (11); A first exhaust steam distribution pipe (19) is arranged inside the first outer cylinder (8) of the exhaust steam recovery tank (1), a second exhaust steam distribution pipe (20) is arranged inside the second outer cylinder (10) of the exhaust steam recovery tank (1), an exhaust steam channel (25) is formed between the second exhaust steam distribution pipe (20) and the inside of the second outer cylinder (10), and a heat exchange cavity (34) is formed between the second exhaust steam distribution pipe (20) and the second outer cylinder (10) and between the first outer cylinder (8) and the first exhaust steam distribution pipe (19); The first exhaust steam distribution pipe (19) and the second exhaust steam distribution pipe (20) both include a plurality of inclined pipe bodies (22), each of which is provided with an exhaust hole (24), the exhaust hole (24) being arranged to be inclined downward, and the exhaust hole (24) being connected to the heat exchange cavity (34) and the exhaust steam channel (25); A waste steam heat recovery component (26) is arranged inside the waste steam recovery tank (1) along the outside of the outer sleeve (7). The waste steam heat recovery component (26) includes a liquid spray head (33). The liquid spray heads (33) are arranged in a plurality of groups. Each group of the plurality of liquid spray heads (33) is arranged in a circular array. The liquid spray heads (33) pass through the outer sleeve (7) and extend to the inside of the heat exchange cavity (34).

2. A deaerator exhaust steam recovery device according to claim 1, characterized in that: The first exhaust steam distribution pipe (19) and the second exhaust steam distribution pipe (20) further include a connecting outer edge (21), the connecting outer edge (21) being located at the upper end of the uppermost inclined tube body (22), and the connecting outer edge (21) being connected to the outer sleeve (7), a blocking inner edge (23) being arranged between two adjacent inclined tube bodies (22), the blocking inner edge (23) being arranged horizontally, and the lowermost inclined tube body (22) on the second exhaust steam distribution pipe (20) being fixed to the fixed bottom cover (11).

3. A deaerator exhaust steam recovery device according to claim 1, characterized in that: A liquid delivery main pipe (27) is provided on one side of the exterior of the exhaust steam recovery tank (1); a first distribution pipe (28) is connected to the liquid delivery main pipe (27) via a tee; a second end of the first distribution pipe (28) is connected to a second distribution pipe (29); and a third end of the first distribution pipe (28) is connected to a third distribution pipe (31).

4. A deaerator exhaust steam recovery device according to claim 3, characterized in that: The first outer cylinder (8) is provided with first outer annular delivery pipes (30) at equal intervals from top to bottom, and a plurality of the first outer annular delivery pipes (30) are connected to the output end of the second distribution pipe (29); the second outer annular delivery pipes (32) are provided with second outer annular delivery pipes (32) at equal intervals from top to bottom on the outside of the second outer cylinder (10), and the second outer annular delivery pipes (32) are connected to the output end of the third distribution pipe (31); and the liquid nozzle (33) is installed in the first outer annular delivery pipe (30) and the second outer annular delivery pipe (32) and is connected to the first outer annular delivery pipe (30) and the second outer annular delivery pipe (32).

5. The deaerator exhaust steam recovery device according to claim 1, characterized in that: An external fixed tube (13) is welded and fixed to the lower end of the fixed bottom cover (11) along the outside of the liquid outlet hole (12); the outside of the external fixed tube (13) is connected to an external fixed ring (14) via an arc-shaped connecting tube; an arc-shaped upwardly warped ring (15) is fixed to the outside of the external fixed ring (14); the end of the arc-shaped upwardly warped ring (15) is arranged upward; and a hot water concentration chamber (16) is arranged inside the exhaust steam recovery tank (1) along the lower ends of the external fixed tube (13), the arc-shaped connecting tube, the external fixed ring (14) and the arc-shaped upwardly warped ring (15).

6. A deaerator exhaust steam recovery device according to claim 1, characterized in that: The inner edge of the exhaust steam recovery tank (1) and the outer side of the outer sleeve (7) are provided with a non-condensable gas chamber (17), and a non-condensable gas discharge pipe (18) is installed on one side of the upper end of the exhaust steam recovery tank (1), and the non-condensable gas discharge pipe (18) is communicated with the inside of the non-condensable gas chamber (17).

7. A deaerator exhaust steam recovery device according to claim 1, characterized in that: An exhaust steam inlet pipe (5) is installed at the upper end of the exhaust steam recovery tank (1), and the lower end of the exhaust steam inlet pipe (5) extends into the exhaust steam recovery tank (1) and is connected to a jet pipe (6).

8. A deaerator exhaust steam recovery device according to claim 5, characterized in that: The exhaust steam recovery tank (1) is provided with a support leg array at the lower end thereof, a hot water discharge pipe (3) is provided at the lower end thereof, the hot water discharge pipe (3) is communicated with the interior of the hot water concentration chamber (16), and a control valve (4) is provided on the hot water discharge pipe (3).

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