CN210801133U

CN210801133U - Regular blowdown expander

Info

Publication number: CN210801133U
Application number: CN201921378105.5U
Authority: CN
Inventors: 黄新国
Original assignee: Shanghai Nanhui Pressure Vessel Factory Co ltd
Current assignee: Shanghai Nanhui Pressure Vessel Factory Co ltd
Priority date: 2019-08-22
Filing date: 2019-08-22
Publication date: 2020-06-19
Anticipated expiration: 2029-08-22

Abstract

The utility model discloses a periodic blowdown expander, which relates to the technical field of chemical equipment and comprises a blowdown expander main body and a heat exchange tank, wherein the middle part of the blowdown expander main body is provided with a mounting port and a cooling water discharge port, and the heat exchange tank is arranged on the mounting port; the two ends of the inner pipe are provided with a first cooling water inlet and a first cooling water outlet at the two ends of the heat exchange tank, the two ends of the spiral finned pipe are provided with a sewage inlet and a sewage outlet at the two ends of the heat exchange tank, the cavity is provided with a second cooling water inlet and a second cooling water outlet at the two ends of the heat exchanger, the first cooling water inlet and the second cooling water inlet are connected with a cooling water discharge port in the blowdown expander main body through pipelines, and the sewage outlet extends into the blowdown expander main body through the pipelines. The periodic blowdown expander can fully recover heat of sewage and obtain two kinds of hot water with stable temperature.

Description

Regular blowdown expander

Technical Field

The utility model relates to a chemical industry equipment technical field, more specifically say, it relates to a periodic blowdown expander.

Background

With the concept of sustainable development, energy and water conservation and water recycling become topics in the chemical field. The sewage is often accompanied by the generation of sewage in some processes, the sewage usually has the characteristics of high pressure and high heat, and the existing processes usually use a sewage expander to recover heat of the sewage, but the reuse of cooling water is still deficient.

For example, chinese patent publication No. CN 206222285U discloses a boiler blow-off expander, which comprises a boiler blow-off expander body and a tubular heat exchanger, wherein the boiler blow-off expander body is of a vertical tank-shaped structure; the middle part of the sewage discharging pipe is provided with a sewage discharging port which is communicated with the sewage discharging pipeline; a sewage discharge port is arranged at the bottom end of the sewage treatment device and is communicated with a sewage discharge pipeline; the top end of the air inlet is provided with an air vent; the upper part of the side wall of the device is provided with two upper through holes, and the lower part of the side wall of the device is provided with two lower through holes; the sewage discharge inlet is positioned between the upper through hole and the lower through hole; the tubular heat exchanger comprises two groups; one group of the sealing plates is matched with the two upper through holes and is arranged at the upper through holes in a sealing way; and the other group is matched with the two lower through holes and is arranged at the lower through holes in a sealing way.

Although two groups of tubular heat exchangers are arranged to recover heat of sewage, the opening of a valve is controlled by a temperature sensor in the above patent, and a process of environment temperature is involved, the temperature of the sewage in an expander is high initially, the temperature rising effect of cold water after heat exchange is good, but the temperature of the sewage in the expander is reduced along with the continuous introduction of the cold water, so that the temperature rising effect of the introduced cold water is reduced, the temperature of the heated cold water is changed along with the temperature rising effect, the temperature change interval is large, if the hot water is used for worker life, the continuously changed temperature can generate inconvenient influence in use, and if the hot water is supplied to a boiler, the changed water temperature can cause the coal burning amount to change at different moments, so that the system is difficult to realize control.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a not enough to prior art exists, the utility model aims to provide a periodic blowdown expander can obtain two kinds of comparatively stable temperature's hot water when carrying out heat recovery.

In order to achieve the above purpose, the utility model provides a following technical scheme:

a periodic blowdown expander is characterized by comprising a heat exchange tank and a blowdown expander main body, wherein the middle part of the blowdown expander main body is provided with a mounting hole and a cooling water exhaust hole, and the heat exchange tank is mounted on the mounting hole;

an inner tube, a spiral finned tube and a cavity are arranged in the heat exchange tank, two ends of the inner tube are respectively connected to two ends of the heat exchange tank, the spiral finned tube is arranged in the inner tube, and the cavity is formed between the inner wall of the heat exchange tank and the inner tube;

the two ends of the inner pipe are provided with a first cooling water inlet and a first cooling water outlet at the end parts of the two ends of the heat exchange tank, the two ends of the spiral finned pipe are provided with a sewage inlet and a sewage outlet at the end parts of the two ends of the heat exchange tank, the cavity is provided with a second cooling water inlet and a second cooling water outlet at the end parts of the two ends of the heat exchange tank, the first cooling water inlet and the second cooling water inlet are connected with a cooling water discharge port on the main body of the pollution discharge expander through pipelines, and the sewage outlet extends into the pollution discharge expander.

Through adopting above-mentioned technical scheme, get into blowdown expander main part through cooling water drainage entry and preheat and shunt into two parts and link to each other with first cooling water inlet and second cooling water inlet on the heat transfer jar, high temperature high pressure sewage enters into the heat transfer jar through the sewage import, and sewage and the cooling water in the cavity and the inner tube carry out the heat transfer, because the spiral finned tube is located the inner tube, consequently, the cooling water intensification effect in the inner tube is higher than the cooling water in the cavity.

The utility model discloses further set up to: and the sewage inlet and the cooling water outlet are arranged on the same side of the heat exchange tank, and the sewage outlet and the cooling water inlet are arranged on the same side of the heat exchange tank.

Through adopting above-mentioned technical scheme, carry out the design against current with cooling water inlet and sewage import, utilize the advantage of heat transfer against current to further improve heat exchange efficiency.

The utility model discloses further set up to: install a baffle area in the hollow region in spiral finned tube center, the baffle area includes the mobile jib and is spiral helicine baffle, the baffle closely laminates and welds on the mobile jib with the mobile jib, the inboard edge laminating of spiral direction and spiral finned tube is followed in the outside of baffle, the baffle edge part transversal is the arc.

By adopting the technical scheme, the baffle belt is utilized to guide the water flow, so that the direction of the cooling water flow flows along the direction of the baffle, the retention time of the cooling water in the inner pipe is increased, and the heat exchange efficiency of the cooling water in the inner pipe is further improved.

The utility model discloses further set up to: and fins are arranged on the outer wall of the inner pipe.

By adopting the technical scheme, the heat exchange area between cooling water in the cavity and the outer wall of the inner pipe is increased, and the heat exchange efficiency is further improved.

The utility model discloses further set up to: one side of the fin is linear and is connected with the outer wall of the inner tube, and the other side of the fin is wavy along the width direction.

Through adopting above-mentioned technical scheme, thereby increase the heat transfer area of fin and improve heat exchange efficiency.

The utility model discloses further set up to: the thickness of the fin is gradually reduced from the linear side to the wavy side.

By adopting the technical scheme, the thickness is designed to be reduced progressively while the heat exchange area is increased, and the material for producing the fins is saved.

The utility model discloses further set up to: the edge portion of the spiral finned tube is in contact with the inner tube wall.

By adopting the technical scheme, the sewage heat source exists in the spiral finned tube, the spiral finned tube is contacted with the outer wall of the inner tube, and part of temperature of the sewage in the spiral finned tube is transmitted to the outer wall, so that the absorption utilization rate of the sewage heat source is further improved.

The utility model discloses further set up to: two ends of the heat exchange tank are provided with sealing covers, two tank lugs are arranged at two side parts of two ends of the heat exchange tank, two first lugs extending out of the tank body are arranged at two end parts of the sealing cover, two second lugs extending out of the tank body are arranged in the direction perpendicular to the connecting line of the two first lugs, the first lug is provided with a through hole, the second lug is provided with a mounting hole, the bolt is connected with the connecting hole on the tank lug through the through hole on the first lug in sequence, the mounting port is provided with a screw hole, the sealing cover and the main body of the pollution discharge expander are connected by a bolt which sequentially passes through the mounting hole on the second lug and the screw hole on the mounting port, the first cooling water inlet, the second cooling water inlet and the sewage outlet are positioned on a sealing cover connected with the main body of the sewage expander, and the first cooling water outlet, the second cooling water outlet and the sewage inlet are positioned on the other side of the sealing cover.

Through adopting above-mentioned technical scheme, be provided with the detachable closing cap with the heat transfer jar, conveniently regularly carry out the inspection and the washing of structure to heat transfer jar inside, connect whole heat transfer jar as an organic whole and through the second lug with the heat transfer jar in blowdown expander main part through the first lug on the closing cap simultaneously.

The utility model discloses further set up to: the sealing cover is provided with a first annular groove and a second annular groove which are respectively matched with the inner pipe and the heat exchange tank body, and a first annular sealing gasket and a second annular sealing gasket are arranged in the first annular groove and the second annular groove.

Through adopting above-mentioned technical scheme, realize sealing connection through seal gasket between closing cap and inner tube and closing cap and cavity, avoid causing the leakage of cooling water at the in-process of heat transfer.

The utility model discloses further set up to: the two ends of the spiral finned tube are provided with connecting pipes along the axial lead direction, the end part of each connecting pipe positioned at the sewage inlet is provided with connecting threads, the two connecting pipes respectively penetrate through the sewage outlet and the sewage inlet and extend out of the heat exchange tank, and sealing rings are arranged between the sewage outlet and the connecting pipes and between the sewage inlet and the connecting pipes.

Through adopting above-mentioned technical scheme, realize introducing or drawing forth through setting up the sewage of connecting pipe in to the spiral finned tube, the condition that sewage leaked has appeared in the in-process that sewage was introduced or was drawn forth has been avoided in the setting of sealing washer simultaneously.

Compared with the prior art, the utility model has the advantages that: the cooling water is divided into two parts which are respectively and fully exchanged with heat source sewage, and finally two kinds of hot water with stable temperature are obtained.

Drawings

FIG. 1 is a front view of the present embodiment;

FIG. 2 is a sectional view of the present embodiment;

FIG. 3 is a front view of the heat exchange tank in the present embodiment;

FIG. 4 is a top plan view of the heat exchange container shown in this embodiment with its lid removed;

FIG. 5 is a view showing the construction of the turn-fin tube and the baffle plate band in the present embodiment;

FIG. 6 is a partial cross-sectional view of the baffle plate strip in the present embodiment;

FIG. 7 is a view showing the structure of the outer fin of the inner tube in the present embodiment;

FIG. 8 is a view showing the structure of the closure of the present embodiment;

FIG. 9 is an elevation view of the blowdown expander body mount port of the present embodiment;

fig. 10 is a sectional view of the heat exchange pot of the present embodiment taken out of the cap.

Reference numerals: 1. a blowdown expander body; 2. a heat exchange tank; 3. an installation port; 4. a cooling water discharge port; 5. a first cooling water inlet; 6. a second cooling water inlet; 7. a sewage outlet; 8. a first cooling water outlet; 9. a second cooling water outlet; 10. a sewage inlet; 11. an inner tube; 12. a chamber; 13. a helical finned tube; 14. connecting holes; 15. a can ear; 16. a main rod; 17. a baffle plate; 18. a connecting pipe; 19. a fin; 20. a first annular groove; 21. a through hole; 22. sealing the cover; 23. mounting holes; 24. a screw hole; 25. a second annular groove; 26. a first annular sealing gasket; 27. a second annular sealing gasket; 28. A seal ring; 29. a first bump; 30. and a second bump.

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

Referring to fig. 1 and 10, the periodic blowdown expander comprises a blowdown expander body 1 and a heat exchange tank 2, wherein an inner tube 11, a spiral finned tube 13 and a chamber 12 are arranged in the heat exchange tank 2, two ends of the inner tube 11 are respectively connected to two ends of the heat exchange tank 2, the spiral finned tube 13 is arranged in the inner tube 11, the edge part of the spiral finned tube is in contact with the wall of the inner tube, and the inner tube 11 and the inner wall of the heat exchange tank form the chamber 12.

Referring to fig. 8, the heat exchange tank 2 is provided at both end portions thereof with caps 22, the caps 22 are provided with first and second

annular grooves

20 and 25 respectively fitted to the inner tube 11 and the heat exchange tank body, a first annular sealing gasket 26 is provided in the first annular groove 20, and a second annular sealing gasket 27 is provided in the second annular groove 25.

Referring to fig. 4 and 8, two tank lugs 15 are arranged on two sides of the heat exchange tank 2, first lugs 29 extending out of the heat exchange tank are arranged on two ends of the sealing cover 22, second lugs 30 extending out of the heat exchange tank are arranged in the direction perpendicular to the connecting line of the first lugs 29, through holes 21 are formed in the first lugs 29, and bolts are connected with the connecting holes 14 in the tank lugs 15 through the through holes 21 in the first lugs 29 in sequence.

Referring to fig. 3, a first cooling water inlet 5 and a first cooling water outlet 8 are formed at the sealing cover 22 at two ends of the inner tube 11, a sewage inlet 10 and a sewage outlet 7 are formed at the sealing cover 22 at two ends of the spiral finned tube 13, a second cooling water inlet 6 and a second cooling water outlet 9 are formed at the sealing cover 22 of the chamber 12, the first cooling water inlet 5, the second cooling water inlet 6 and the sewage outlet 7 are arranged at one side of the heat exchange tank body, and the first cooling water outlet 8, the second cooling water outlet 9 and the sewage inlet 10 are arranged at the other side of the heat exchange tank 2.

Referring to fig. 2 and 3, the middle of the blowdown expander body 1 is provided with a mounting port 3 and a cooling water discharge port 4, the heat exchange tank 2 sequentially passes through a mounting hole 23 (see fig. 8) on the second bump 30 and a screw hole 24 (see fig. 9) on the mounting port 3 through bolts to be connected, the cooling water discharge port 4 on the blowdown expander body 1 is connected with a first cooling water inlet 5 and a second cooling water inlet 6 of the heat exchange tank 2 through pipes, and the sewage outlet 7 extends into the blowdown expander body 1.

Referring to fig. 5, a baffle belt is installed in the central hollow area of the spiral finned tube 13, the baffle belt comprises a main rod 16 and a spiral baffle 17, the baffle 17 is tightly attached to the main rod 16 and welded on the main rod 16, the outer side of the baffle 17 is attached to the inner side edge of the spiral finned tube 13 along the spiral direction, and the cross section of the edge of the baffle 17 is arc-shaped.

Referring to fig. 2 and 3, the spiral finned tube 13 is provided at both ends thereof with a connecting tube 18 along the axial direction, the connecting tube 18 extending into the blowdown expander body 1 is provided at an end thereof with connecting threads, the connecting tube 18 extends out of the heat exchange tank 2 through the sewage inlet 10 and the sewage outlet 7, a gap is formed between the connecting tube 18 and the sewage inlet 10 and the sewage outlet 7, and a sealing ring 28 (see fig. 8) is filled in the gap.

Referring to fig. 7, the outer wall of the inner tube is provided with fins 19, one side of each fin 19 is connected with the outer wall of the inner tube in a linear shape, the other opposite side of each fin 19 is in a wave shape along the width direction, and the thickness of each fin 19 is gradually reduced from the linear side to the wave-shaped side.

The working principle is as follows: firstly, sewage enters the spiral finned tube from a sewage inlet of the heat exchange tank, meanwhile, cooling water enters the blowdown expander from a cooling water exhaust port of the blowdown expander main body for preheating, then is divided into two parts through a pipeline and respectively enters a first cooling water inlet and a second cooling water inlet of the heat exchange tank, and then enters the inner tube and the chamber to perform heat exchange with the sewage in a countercurrent state. The cooling water in the inner pipe exchanges heat with the sewage in the spiral finned tube through the baffle belt diversion, the water in the cavity exchanges heat with the water in the inner pipe and the heat led out by the spiral finned tube and the inner pipe wall, the sewage after heat exchange is led into the sewage discharge expander body through the pipeline, and finally two types of cooling water with stable temperature are obtained at the first cooling water outlet and the second cooling water outlet to meet the use requirement of hot water supply.

It is above only the utility model discloses a preferred embodiment, the utility model discloses a scope of protection does not only confine above-mentioned embodiment, the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The periodic blowdown expander is characterized by comprising a blowdown expander main body (1) and a heat exchange tank (2), wherein the middle part of the blowdown expander main body (1) is provided with a mounting port (3) and a cooling water exhaust port (4), and the heat exchange tank (2) is mounted on the mounting port (3) through bolt connection;

an inner tube (11), a spiral finned tube (13) and a chamber (12) are arranged in the heat exchange tank, two ends of the inner tube (11) are respectively connected to two ends of the heat exchange tank (2), the spiral finned tube (13) is arranged in the inner tube (11), and the chamber (12) is formed between the inner wall of the heat exchange tank and the inner tube;

the utility model discloses a blowdown expander, including inner tube (11), spiral finned tube (13), cavity (12), heat exchange tank (2), first cooling water inlet (5) and first cooling water outlet (8) are formed with at the both ends tip of inner tube (11) in the both ends tip of heat exchange tank (2), the both ends of spiral finned tube (13) are formed with sewage inlet (10) and sewage outlet (7) in the both ends tip of heat exchange tank (2), cavity (12) are formed with second cooling water inlet (6) and second cooling water outlet (9) in heat exchange tank (2) both ends tip, cooling water inlet (5) and second cooling water inlet (6) pass through the pipe connection with the cooling water drainage entry on blowdown expander main part (1), sewage outlet (7) stretch into in the blowdown expander main part.

2. A periodic blowdown expander as claimed in claim 1, wherein the blowdown inlet (10) and the cooling water outlet are located on the same side of the heat exchange tank, and the blowdown outlet (7) and the cooling water inlet are located on the same side of the heat exchange tank.

3. A periodic blowdown expander as claimed in claim 1, wherein a baffle belt is mounted in the central hollow region of the spiral finned tube (13), said baffle belt includes a main rod (16) and a spiral baffle (17), said baffle (17) is closely attached to the main rod (16) and welded to the main rod (16), the outer side of said baffle (17) is attached to the inner side edge of the spiral finned tube (13) along the spiral direction, and the cross section of the edge portion of said baffle (17) is arc-shaped.

4. A periodic blowdown expander as claimed in claim 1 wherein fins (19) are provided on the outer wall of the inner tube.

5. A periodically blowdown expander as claimed in claim 4, wherein the fins (19) are linear on one side and connected to the outer wall of the inner tube, and undulate widthwise on the opposite side.

6. A periodically blowdown expander as claimed in claim 4, wherein the fin (19) tapers in thickness from a straight side to a wavy side.

7. A periodically blowdown expander as claimed in claim 1, wherein the turn-fin tube (13) has an edge portion in contact with the inner tube wall.

8. The periodic blowdown expander according to claim 1, wherein both ends of the heat exchange tank (2) are provided with sealing caps (22), both side portions of both ends of the heat exchange tank (2) are provided with two tank lugs (15), both end portions of the sealing caps (22) are provided with two first lugs (29) extending out of the tank body, a connecting line of the two first lugs (29) is provided with two second lugs (30) extending out of the tank body in a vertical direction, the first lugs (29) are provided with through holes (21), the second lugs (30) are provided with mounting holes (23), bolts sequentially pass through the through holes (21) on the first lugs to be connected with the connecting holes (14) on the tank lugs, the mounting port (3) is provided with screw holes (24), and the sealing caps (22) and the blowdown expander main body (1) are sequentially connected with the bolts through the mounting holes (23) on the second lugs and the screw holes (24) on the mounting port by bolts, the first cooling water inlet (5), the second cooling water inlet (6) and the sewage outlet (7) are located on a sealing cover connected with the sewage expander main body (1), and the first cooling water outlet (8), the second cooling water outlet (9) and the sewage inlet are located on the sealing cover on the other side.

9. A periodic blowdown expander according to claim 8, wherein said cover (22) is provided with first and second annular grooves (20, 25) for cooperating with the inner tube (11) and the heat exchange tank respectively, said first and second annular grooves (20, 25) being provided with first and second annular sealing gaskets (26, 27).

10. The expander for periodic blowdown according to claim 8, wherein both ends of the spiral finned tube (13) are provided with a connecting tube (18) along the axial lead direction, the end of the connecting tube (18) located at the sewage inlet (10) is provided with connecting threads, the two connecting tubes (18) respectively pass through the sewage outlet (7) and the sewage inlet (10) and extend out of the heat exchange tank (2), and sealing rings (28) are arranged between the sewage outlet (7) and the connecting tubes (18) and between the sewage inlet (10) and the connecting tubes (18).