CN210568351U

CN210568351U - Residual gas recycling device of thermal deaerator

Info

Publication number: CN210568351U
Application number: CN201921378018.XU
Authority: CN
Inventors: 沈剑兵
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: 2020-05-19
Anticipated expiration: 2029-08-22

Abstract

The utility model discloses a residual gas recovery and utilization device of a thermal deaerator, which relates to the technical field of thermal deaerator equipment. An air pipe, and a water storage tank for storing softened water, the water storage tank is provided with a heat exchange pipe, the heat exchange pipe is arranged along the length direction of the water storage tank, and both ends of the heat exchange pipe are located outside the water storage tank, and all One end of the heat exchange pipe is communicated with the ventilation pipe, and the other end is connected with a circulating water tank through a connecting pipe. The circulating water tank is communicated with the water inlet end of the water storage tank through a circulating pipe. The connection port is set close to the water inlet end of the water storage tank. By setting the residual gas recovery and utilization device, it is used to recover and reuse the residual steam after deoxygenation by the deaerator, so as to achieve the purpose of energy saving and emission reduction, and improve the utilization rate of resources.

Description

Residual gas recycling device of thermal deaerator

Technical Field

The utility model relates to a technical field of heating power deoxidization equipment, more specifically say, it relates to a residual air recycle device of heating power oxygen-eliminating device.

Background

Gases such as oxygen, nitrogen, carbon dioxide and the like are often dissolved in boiler feed water, and the existence of carbon dioxide and oxygen is easy to corrode a boiler. Especially, oxygen, which is very active gas, can be directly combined with a plurality of non-metals, when the oxygen is combined with the non-metals or the metals, stable oxides are often formed or precipitates are produced, the oxygen has a corrosion effect on a boiler, the feed water of the boiler needs to be deoxidized, and a common device is a thermal deaerator.

The thermal power oxygen-eliminating device includes the deoxidization head and set up in deoxidization head below and with the deoxidization water tank that the deoxidization head is connected mutually, the first structure of deoxidization is the barrel that has inlet outlet, steam inlet and gas vent, is equipped with the nozzle or plays the membrane ware on the upper portion of barrel, and the middle part is equipped with the packing layer, and the lower part is established and is spouted the steam pipe, by the demineralized water that the water inlet on barrel upper portion flowed into, behind nozzle atomization or play membrane ware formation water film, carries out the heat exchange with the steam that gets into from barrel lower part steam inlet, makes the demineralized water boiling reach the deoxidization purpose. Gas and steam dissolved in water are discharged from an exhaust port at the top of the cylinder body, and deoxygenated water flows into the deoxygenating water tank from the lower part of the cylinder body for standby.

However, after the existing thermal deaerator is heated by steam to deaerate, the residual steam and oxygen are directly discharged into the atmosphere, which causes waste of water resources and loss of heat.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a residual gas recycle device of heating power oxygen-eliminating device with the residual steam recycle behind the oxygen-eliminating device deoxidization, reaches energy saving and emission reduction's purpose, improves the utilization ratio of resource.

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

the utility model provides a residual air recycle device of heating power oxygen-eliminating device, its gas vent with the deoxidization head is connected, include with the breather pipe that the deoxidization head is linked together to and be used for depositing the storage water tank of demineralized water, be provided with the heat exchange tube in the storage water tank, the heat exchange tube sets up along storage water tank length direction, the heat exchange tube both ends all are located the storage water tank outside, just heat exchange tube one end with the breather pipe is linked together, the other end is connected with circulation tank through the connecting pipe, circulation tank with the end of intaking of storage water tank is linked together through the circulating pipe, the heat exchange tube is close to the storage water.

Through adopting above-mentioned technical scheme, the during operation, the surplus steam after the deaerator deoxidization is transported to the heat-transfer pipe in through the breather pipe to make steam and the demineralized water in the storage water tank carry out the heat exchange, realize retrieving its surplus steam's cooling, and be used for heating the demineralized water in the storage water tank, tentatively improve the temperature of demineralized water, be used for reducing the oxygen content in the demineralized water.

Meanwhile, when softened water enters the thermal deaerator, the time for the softened water to rise to 100 ℃ is shortened due to the fact that the temperature of the softened water is increased, and the deaerating effect of the softened water is improved due to the fact that the contact time of the softened water and steam is unchanged.

The cooled residual steam is transported into the circulating water tank through the connecting pipe for collection, so that the residual steam can be conveniently recycled.

The water in the circulating water tank can be transported into the water storage tank through the circulating pipe for reuse.

The utility model discloses further set up to: the heat exchange tube extends spirally along the length direction of the water storage tank and is contacted with two adjacent spiral coils, and a water supply channel for water to pass through is formed in the middle of the spirally arranged heat exchange tube.

Through adopting above-mentioned technical scheme, the heat exchange tube spiral sets up, increases gaseous operating distance to increase the contact time of gas and demineralized water, improve steam and demineralized water's heat transfer effect and efficiency.

The utility model discloses further set up to: a first blocking plate and a second blocking plate are respectively arranged at two ends of the heat exchange tube, the first blocking plate is arranged close to the water inlet end of the water storage tank, and the water inlet end of the water storage tank penetrates through the first blocking plate and is positioned in the water supply channel;

the second stop plate is close to the breather pipe and is provided with a water outlet hole, and the water outlet end of the water storage tank is arranged outside the water supply channel and at the bottom of the water storage tank.

Through adopting above-mentioned technical scheme, during operation, demineralized water enters into the water supply passageway through the end of intaking to along water supply passageway length direction upward movement, come out from the water supply passageway through the apopore that sets up on the second barrier plate and enter into the water supply passageway outside, then along storage water tank length direction downward movement, from setting up in the play water end transportation heating power oxygen-eliminating device of storage water tank bottom.

Through the arrangement, the running distance of softened water is increased, so that the contact time of the softened water and the heat exchange tube is prolonged, and the purposes of improving the heat exchange effect and efficiency of steam and softened water are achieved.

The utility model discloses further set up to: the heat exchange tube is provided with a first cooling fin and a second cooling fin, the first cooling fin is located in the water supply channel, and the second cooling fin is located outside the water supply channel.

Through adopting above-mentioned technical scheme, increase the area of contact of demineralized water and heat exchange tube to improve steam and demineralized water's heat transfer effect and efficiency.

The utility model discloses further set up to: the first radiating fins are uniformly arranged along the length direction of the water supply channel and are matched with the water supply channel, and the first radiating fins and the water storage tank are coaxially arranged;

and water passing grooves are formed in any ends of the first radiating fins, which are close to the side edges of the first radiating fins, and the water passing grooves between every two adjacent first radiating fins are arranged in a staggered mode.

By adopting the technical scheme, the operation speed of softened water is blocked, the contact time of the softened water and the heat exchange tube is prolonged, the heat exchange effect and efficiency of steam and the softened water are improved, heat energy in the steam is recycled as far as possible, the purposes of energy conservation and emission reduction are achieved, and the utilization rate of resources is improved.

The utility model discloses further set up to: the first radiating fins are arranged in an arc shape, and the arc-shaped directions between every two adjacent first radiating fins are opposite, namely one first radiating fin is arranged towards the first blocking plate in a concave mode, and the other first radiating fin is arranged towards the first blocking plate in a convex mode.

Through adopting above-mentioned technical scheme, the first fin that the arc set up can carry out certain direction and block to the demineralized water of operation upwards to improve steam and demineralized water's heat transfer effect and efficiency. For example, the first radiating fins arranged towards the first blocking plate in a concave mode can generate a force for enabling softened water running upwards to be close to the first blocking plate, the softened water is gathered in the middle of the first radiating fins and used for blocking the softened water running upwards, the contact time of the softened water and the heat exchange tube is prolonged, and therefore the heat exchange effect and efficiency of steam and the softened water are improved.

The first fin towards the protruding setting of first barrier plate uses with the first fin cooperation towards the sunken setting of first barrier plate, and the first fin towards the protruding setting of first barrier plate is located the top, when the demineralized water upwards moves, because two first fins distance in the middle is less, can hinder the demineralized water upwards to move, reach and block the purpose that the demineralized water upwards moved, increase the contact time of demineralized water and heat exchange tube to improve the heat transfer effect and the efficiency of steam and demineralized water.

Simultaneously, the first fin that the arc set up can disperse the demineralized water of upwards moving to its impact force on the heat exchange tube, prevents that first fin from because the demineralized water is too big to its impact force, and influence the life of first fin.

The utility model discloses further set up to: the outer diameter of the second radiating fin is matched with the inner diameter of the water storage tank, the second radiating fin and the water storage tank are coaxially arranged, the second radiating fin is provided with water permeable holes, and the water permeable holes in two adjacent second radiating fins are arranged in a staggered mode.

The utility model discloses further set up to: the downthehole axis of rotation that is provided with of permeating water, the axis of rotation with the downthehole footpath looks adaptation of permeating water, just be provided with the stirring leaf on the axis of rotation surface.

Through adopting above-mentioned technical scheme, the demineralized water of downstream can be blockked to the stirring leaf to increase the contact time of demineralized water and heat exchange tube, improve steam and demineralized water's heat transfer effect and efficiency. Meanwhile, the softened water moving downwards impacts the stirring blades, so that the stirring blades are driven to rotate to stir the softened water and balance the temperature of the softened water.

The utility model discloses further set up to: and a heat preservation and insulation layer is arranged outside the vent pipe.

Through adopting above-mentioned technical scheme for the thermal giving off of separation prevents that steam from giving off the heat to the air in the transportation, causes the waste of resource, and can cause the rise of ambient temperature, influences workman's operation.

The utility model discloses further set up to: and air holes are formed in the circulating water tank, and air-permeable films are arranged in the air holes.

Through adopting above-mentioned technical scheme, the discharge of the gas of being convenient for, and make dust and bacterium in the air can not enter into circulation tank.

Compared with the prior art, the utility model has the advantages that:

1. the residual gas recycling device is used for recycling residual steam after the deaerator is deaerated, so that the purposes of energy conservation and emission reduction are achieved, and the utilization rate of resources is improved;

2. through the spiral arrangement of heat exchange tube for increase gaseous moving distance, thereby increase the contact time of gas and demineralized water, improve steam and demineralized water's heat transfer effect and efficiency.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a plan sectional view of a water storage tank;

fig. 3 is an enlarged view of a portion a of fig. 2.

Reference numerals: 100. an oxygen removal head; 110. an exhaust port; 120. a breather pipe; 200. a water storage tank; 210. a water inlet end; 220. a water outlet end; 300. a heat exchange pipe; 310. a water supply channel; 320. a first barrier plate; 330. a second barrier plate; 331. a water outlet hole; 340. a first heat sink; 341. a water trough; 350. a second heat sink; 351. water permeable holes; 352. a rotating shaft; 353. stirring blades; 400. a circulating water tank; 410. a connecting pipe; 420. a circulation pipe; 430. and (4) air holes.

Detailed Description

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

Referring to fig. 1, a residual gas recycling device of a thermal deaerator, which is connected to an exhaust port 110 of a deaerator 100, includes a breather pipe 120 communicated with the deaerator 100, and a water storage tank 200 for storing softened water. In this embodiment, a thermal insulation layer (labeled in the figure) is adhered to the outside of the ventilation pipe 120 to prevent heat dissipation.

Referring to fig. 1 and 2, a heat exchange pipe 300 is provided inside the water storage tank 200, the heat exchange pipe 300 is provided along the length direction of the water storage tank 200, and both ends of the heat exchange pipe 300 are located outside the water storage tank 200. One end of the heat exchange pipe 300 is communicated with the vent pipe 120, and the other end thereof is connected with a circulation water tank 400 through a connection pipe 410. The circulation water tank 400 is communicated with the water inlet end 210 of the water storage tank 200 through a circulation pipe 420, and a connection port of the heat exchange pipe 300 and the connection pipe 410 is provided near the water inlet end 210 of the water storage tank 200.

Referring to fig. 1 and 2, an air hole 430 is formed on the circulation water tank 400, and an air permeable membrane (labeled in the figure) is adhered in the air hole 430. In this example, the air permeable film was an AZ-838-10 waterproof air permeable film sold by Onzhong electronics materials science and technology Co., Ltd, Dongguan.

Referring to fig. 2 and 3, the heat exchange pipe 300 is spirally extended along the length direction of the water storage tank 200, and two adjacent coils are in contact with each other, and a water supply channel 310 for passing water is formed in the middle of the spirally arranged heat exchange pipe 300.

Referring to fig. 2, a first blocking plate 320 and a second blocking plate 330 are welded to both ends of the heat exchange pipe 300, the first blocking plate 320 is disposed near the water inlet end 210 of the water storage tank 200, and the water inlet end 210 of the water storage tank 200 penetrates through the first blocking plate 320 and is located in the water supply channel 310. The second blocking plate 330 is disposed near the air pipe 120, and the second blocking plate 330 has a water outlet 331. The water outlet end 220 of the water storage tank 200 is arranged outside the water supply channel 310 and at the bottom of the water storage tank 200, so that the running distance of the softened water is increased, the contact area of the softened water and the heat exchange pipe 300 is increased, and the heat exchange effect of the softened water and the heat exchange pipe 300 is improved.

Referring to fig. 2, the heat exchange pipe 300 is welded with a first fin 340 and a second fin 350, the first fin 340 being located inside the water supply passage 310, and the second fin 350 being located outside the water supply passage 310.

Referring to fig. 2 and 3, the first cooling fins 340 are uniformly arranged along the length direction of the water supply passage 310 and are fitted to the water supply passage 310, and the first cooling fins 340 are coaxially arranged with the water storage tank 200. The first fins 340 have water passing grooves 341 formed at any end near the sides thereof, and the water passing grooves 341 between two adjacent first fins 340 are staggered.

Referring to fig. 2 and 3, the first heat dissipation fins 340 are disposed in an arc shape, and the arc-shaped orientations between two adjacent first heat dissipation fins 340 are opposite, that is, one of the first heat dissipation fins 340 is recessed toward the first blocking plate 320, and the other first heat dissipation fin 340 is raised toward the first blocking plate.

Referring to fig. 2, the outer diameter of the second fin 350 is adapted to the inner diameter of the water storage tank 200, and the second fin 350 is coaxially disposed with the water storage tank 200.

Referring to fig. 2 and 3, the second fins 350 are provided with water permeable holes 351, and the water permeable holes 351 of two adjacent second fins 350 are staggered. And a rotating shaft 352 is arranged in the water permeable hole 351, the rotating shaft 352 is matched with the inner diameter of the water permeable hole 351, and a stirring blade 353 is arranged on the outer surface of the rotating shaft 352. In this embodiment, both ends of the rotation shaft 352 are welded in the water permeable holes 351, and the stirring blade 353 is rotatably connected to the rotation shaft 352 through a bearing.

The working process is as follows:

during operation, the residual steam after the deaerator is deaerated is transported to the heat exchange tube 300 through the breather tube 120, and is transported to the circulating water tank 400 through the connecting tube 410 for collection after the heat exchange with the softened water. The gas in the circulation tank 400 is separated by the gas permeable membrane and then discharged into the air through the gas permeable hole 430.

The cooling water can also transport the condensed water in the circulation tank 400 to the water inlet end 210 of the water storage tank 200 through the circulation pipe 420, so that the condensed water and the softened water enter into the water supply channel 310 through the water inlet end 210 of the water storage tank 200, and enter outside the water supply channel 310 through the water outlet 331 provided on the second blocking plate 330 after being guided and blocked by the first cooling fins 340 provided in the water supply channel 310.

The softened water then moves downward along the length of the storage tank 200, is guided and blocked by the second heat sink 350 disposed outside the water supply passage 310, and is transported into the oxygen removing head 100 through the water outlet end 220 disposed at the bottom of the storage tank 200.

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. A residual gas recycling device of a thermal deaerator is connected with an exhaust port (110) of a deaerator head (100), it is characterized by comprising a breather pipe (120) communicated with the oxygen removing head (100), and a water storage tank (200) for storing softened water, wherein a heat exchange pipe (300) is arranged in the water storage tank (200), the heat exchange pipe (300) is arranged along the length direction of the water storage tank (200), both ends of the heat exchange pipe (300) are positioned outside the water storage tank (200), one end of the heat exchange pipe (300) is communicated with the vent pipe (120), the other end is connected with a circulating water tank (400) through a connecting pipe (410), the circulating water tank (400) is communicated with the water inlet end (210) of the water storage tank (200) through a circulating pipe (420), the connection port of the heat exchange pipe (300) and the connection pipe (410) is arranged close to the water inlet end (210) of the water storage tank (200).

2. The residual air recycling device of the thermal deaerator is characterized in that the heat exchange tubes (300) extend spirally along the length direction of the water storage tank (200) and are in contact with each other, and a water supply channel (310) for water to pass through is formed in the middle of each spirally arranged heat exchange tube (300).

3. The residual air recycling device of the thermal deaerator is characterized in that a first blocking plate (320) and a second blocking plate (330) are respectively arranged at two ends of the heat exchange pipe (300), the first blocking plate (320) is arranged close to a water inlet end (210) of a water storage tank (200), and the water inlet end (210) of the water storage tank (200) penetrates through the first blocking plate (320) and is positioned in the water supply channel (310);

the second blocking plate (330) is arranged close to the vent pipe (120), a water outlet hole (331) is formed in the second blocking plate (330), and a water outlet end (220) of the water storage tank (200) is arranged outside the water supply channel (310) and at the bottom of the water storage tank (200).

4. The residual air recycling device of the thermal deaerator as claimed in claim 3, wherein a first cooling fin (340) and a second cooling fin (350) are arranged on the heat exchange tube (300), the first cooling fin (340) is located in the water supply channel (310), and the second cooling fin (350) is located outside the water supply channel (310).

5. The residual air recycling device of the thermal deaerator as claimed in claim 4, wherein the first cooling fins (340) are uniformly arranged along the length direction of the water supply channel (310) and are matched with the water supply channel (310), and the first cooling fins (340) are coaxially arranged with the water storage tank (200);

the water passing grooves (341) are formed in any end, close to the side, of each first radiating fin (340), and the water passing grooves (341) between every two adjacent first radiating fins (340) are arranged in a staggered mode.

6. The residual air recycling device of the thermal deaerator as claimed in claim 5, wherein the first heat dissipating fins (340) are disposed in an arc shape, and the arc-shaped orientations between two adjacent first heat dissipating fins (340) are opposite, i.e. one of the first heat dissipating fins (340) is recessed toward the first blocking plate (320), and the other first heat dissipating fin (340) is raised toward the first blocking plate.

7. The residual air recycling device of a thermal deaerator as claimed in claim 4, wherein the outer diameter of the second cooling fin (350) is adapted to the inner diameter of the water storage tank (200), the second cooling fin (350) is coaxially arranged with the water storage tank (200), the second cooling fin (350) is provided with water permeable holes (351), and the water permeable holes (351) of two adjacent second cooling fins (350) are staggered.

8. The residual gas recycling device of the thermal deaerator as claimed in claim 7, wherein a rotating shaft (352) is disposed in the water permeable hole (351), the rotating shaft (352) is adapted to an inner diameter of the water permeable hole (351), and a stirring blade (353) is disposed on an outer surface of the rotating shaft (352).

9. The residual gas recycling device of the thermal deaerator as claimed in claim 1, wherein a thermal insulation layer is disposed outside the air pipe (120).

10. The residual air recycling device of the thermal deaerator as claimed in claim 1, wherein an air hole (430) is formed in the circulation water tank (400), and an air permeable membrane is arranged in the air hole (430).