Steam whitening eliminating device for deaerator

Abstract

The utility model provides a steam whitening eliminating device for a deaerator. The steam whitening eliminating device comprises a tank body, a coil pipe and a spraying assembly, the internal space of the tank body is divided into an upper exhaust chamber and a lower cooling chamber, the pipe wall of the exhaust chamber is provided with a ventilation opening used for being connected with an instrument air pipeline, and the bottom of the cooling chamber is provided with a liquid outlet; the coil pipe is arranged in the cooling chamber, a pipe opening in the bottom end of the coil pipe is communicated with a steam exhaust opening of the deaerator through a middle pipeline, and a pipe opening in the top end of the coil pipe extends into the exhaust chamber; the spraying assembly is arranged on the top of the cooling chamber and can spray a cooling medium to the coil pipe in the cooling chamber. Based on the technical scheme of the utility model, the steam in the coil pipe is cooled by spraying in the cooling chamber, so that gaseous and liquid water in the steam is condensed, and instrument air is further utilized to perform secondary cooling on the steam discharged by the coil pipe in the exhaust chamber, so that residual water in the steam is condensed, and the cooling effect is improved. Therefore, steam white smoke elimination and water resource and energy recovery are realized.

Description

Technical Field

[0001] The utility model relates to the technical field of boiler systems, in particular to a deaerator steam whitening elimination device. Background Art

[0002] The atmospheric rotary film deaerator currently used in boiler systems is a new type of thermal deaerator. Its working principle is as follows: when water is heated to the boiling temperature under the corresponding pressure, the water vapor pressure at the steam-water interface is the same as the external atmospheric pressure, and the partial pressure of other gases is zero. At this time, various gases (including oxygen) cannot be dissolved in water and can be removed. This deoxygenation method has the advantages of being simple, reliable and having a good deoxygenation effect.

[0003] The exhaust of the deaerator is mainly carried out through the exhaust port. Due to the need for deoxygenation, a large amount of steam will be discharged from the exhaust port. Most of the existing technologies adopt the method of direct discharge to the air, which will form white pollution of steam and cause the loss of water resources and heat. At present, there is a technical solution of using shell and tube heat exchanger to condense steam, such as the existing technology with publication number CN214948967U, but the whole equipment is large in size and complex in structure, which is not conducive to application in the deaerator system, and its heat exchange means is single and the effect cannot be guaranteed. Utility Model Content

[0004] In order to solve the problems of white pollution and waste of water resources and heat caused by direct discharge of steam from an existing deaerator, the utility model proposes a deaerator steam whitening elimination device.

[0005] In the first aspect, the utility model provides a deaerator steam whitening elimination device, comprising:

[0006] The tank body has an internal space divided into an upper exhaust chamber and a lower cooling chamber, a vent for connecting an instrument air line is provided on the pipe wall of the exhaust chamber, and a drain port is provided at the bottom of the cooling chamber;

[0007] A coil, which is arranged in the cooling chamber, wherein the bottom end of the coil is connected to the exhaust port of the deaerator through an intermediate pipeline, and the top end of the coil extends into the exhaust chamber; and

[0008] A spray assembly is arranged at the top of the cooling chamber and can spray cooling medium to the coil in the cooling chamber.

[0009] In one embodiment, the coil is configured as a spiral coil structure or an S-shaped coil structure.

[0010] In one embodiment, for the coil configured as an S-shaped coiled structure, a plurality of relatively protruding flow-guiding protrusions distributed along the circumferential direction are configured on the inner wall of the coil, and the flow-guiding protrusions extend continuously along the axial direction of the coil, and a flow-guiding groove is formed between two adjacent flow-guiding protrusions.

[0011] In one embodiment, a plurality of first baffles are disposed in the cooling chamber, the plurality of first baffles are distributed in sequence along a vertical direction, and the coil is coiled along the interval spaces between the plurality of first baffles.

[0012] In one embodiment, a plurality of second baffles distributed in sequence along the vertical direction are provided in the cooling chamber, and the top pipe opening of the coil and the vent are both located directly below the second baffle at the bottom.

[0013] In one embodiment, the top end of the coil faces upward, directly facing the second baffle; the vent faces obliquely downward, toward the partition separating the exhaust chamber and the cooling chamber.

[0014] In one embodiment, the top pipe opening of the coil is configured as a bell mouth, and a raised flow guide member facing the top pipe opening of the coil is disposed on the lower surface of the second baffle at the bottom.

[0015] In one embodiment, the exhaust chamber is configured as a conical structure with a radial dimension gradually decreasing in a vertically upward direction, and an exhaust port is configured at the top of the exhaust chamber.

[0016] In one embodiment, a diversion and drainage valve is provided on the intermediate pipeline, and an output end of the diversion and drainage valve is connected to the deaerator through a pipeline.

[0017] In one embodiment, the cooling medium is desalted water, and the drain port is connected to the deaerator through a pipeline.

[0018] The above technical features can be combined in various suitable ways or replaced by equivalent technical features as long as the purpose of the utility model can be achieved.

[0019] The utility model provides a deaerator steam whitening elimination device, which has at least the following beneficial effects compared with the prior art:

[0020] The utility model discloses a deaerator steam whitening elimination device, which utilizes a coil to guide the steam of the deaerator into a tank body, cools the steam in the coil by spraying in a cooling chamber, so that most of the gaseous and liquid water in the steam is condensed, and further utilizes instrument air in an exhaust chamber to perform secondary cooling on the steam discharged from the coil to condense the residual water therein, thereby realizing steam whitening elimination and recovery of water resources and energy, and realizing energy saving and environmental protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.

[0022] Figure 1 The overall structure diagram of the steam whitening elimination device of the utility model is shown;

[0023] Figure 2 A schematic cross-sectional view of the coil of the present invention is shown.

[0024] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.

[0025] Reference numerals:

[0026] 1-tank body, 11-exhaust chamber, 111-vent, 112-exhaust port, 12-cooling chamber, 121-drain port, 2-coil, 21-guide protrusion, 22-guide groove, 3-spray assembly, 4-first baffle, 5-second baffle, 6-guide drain valve. DETAILED DESCRIPTION

[0027] The utility model will be further described below in conjunction with the accompanying drawings.

[0028] The embodiment of the utility model provides a deaerator steam whitening elimination device, which comprises:

[0029] The tank body 1 has an internal space divided into an upper exhaust chamber 11 and a lower cooling chamber 12. A vent 111 for connecting an instrument air line is provided on the pipe wall of the exhaust chamber 11, and a drain port 121 is provided at the bottom of the cooling chamber 12.

[0030] The coil 2 is arranged in the cooling chamber 12, the bottom end of the coil 2 is connected to the exhaust port of the deaerator through the middle pipeline, and the top end extends into the exhaust chamber 11; and

[0031] The spray assembly 3 is arranged at the top of the cooling chamber 12 and can spray the cooling medium to the coil 2 in the cooling chamber 12 .

[0032] Specifically, the deaerator steam whitening elimination device of the utility model is mainly used to collect the liquid part in the steam, to prevent the liquid part from being discharged into the atmosphere to produce white pollution (referring to the liquid part appearing white in the atmosphere), and to avoid waste of water resources and loss of heat carried by the liquid part by collecting the liquid part.

[0033] As shown in the attached picture Figure 1As shown, the steam whitening elimination device mainly includes three parts: a tank body 1, a coil 2 and a spray assembly 3. The interior of the tank body 1 is divided into an upper exhaust chamber 11 and a lower cooling chamber 12, which are used to cool the steam twice. The main body of the coil 2 is arranged in the cooling chamber 12, and its outlet extends into the exhaust chamber 11. High-temperature steam (including gaseous water and liquid water droplets) is input into the coil 2 through the intermediate pipeline from the exhaust port of the deaerator, and the steam flows along the inside of the coil 2 to enter the exhaust chamber 11; in this process, the spray assembly 3 in the cooling chamber 12 sprays the cooling medium to the coil 2, so that the steam in the coil 2 can be cooled, so that most of the gaseous and liquid water in the steam is condensed, and then attached and gathered on the inner wall of the coil 2 to form a water flow, which flows down along the inner wall of the coil 2 and is uniformly collected. After the cooling medium absorbs the heat of the steam, the temperature rises and can be discharged through the drain pipe for recycling, thereby recovering the heat therein. When the steam then enters the exhaust through the pipe opening at the top of the coil 2, the instrument air input from the instrument air pipeline through the vent 111 is mixed with the steam in the exhaust chamber 11, which can further cool the steam so that the moisture retained in the steam is condensed, thereby realizing secondary recovery of water resources and energy.

[0034] Therefore, based on the deaerator steam whitening elimination device of the utility model, the steam of the deaerator is introduced into the tank body 1 by using the coil 2, and the steam in the coil 2 is cooled by spraying in the cooling chamber 12, so that most of the gaseous and liquid water in the steam is condensed, and the steam discharged from the coil 2 is further cooled for the second time in the exhaust chamber 11 by using instrument air to condense the residual water therein, thereby realizing steam whitening and recovery of water resources and energy, and achieving energy saving and environmental protection.

[0035] In one embodiment, the coiled tube 2 is configured as a spirally wound structure or an S-shaped wound structure.

[0036] Specifically, according to different needs, the coil 2 can be constructed as a spiral winding structure or an S-shaped winding structure, as long as the surface area of ​​the coil 2 can be increased. In this embodiment, the coil 2 adopts an S-shaped winding structure, because the present application adopts condensation of water inside the coil 2, and the flow direction of the condensed water along the inner wall of the coil 2 is opposite to the original flow direction of the steam. If the inner diameter of the pipe is too small, the steam will seriously hinder the flow of the water, and the S-shaped winding structure is relatively simple to manufacture and is more compatible with pipes with larger diameters.

[0037] In one embodiment, for the coil 2 constructed as an S-shaped winding structure, a plurality of relatively protruding guide protrusions 21 distributed along the circumferential direction are constructed on the inner wall of the coil 2. The guide protrusions 21 extend continuously along the axial direction of the coil 2, and a guide groove 22 is formed between two adjacent guide protrusions 21.

[0038] Specifically, referring to the accompanying drawings Figure 1As shown, in the S-shaped coil 2, due to the coexistence of steam and water flow, the flows in opposite directions will inevitably affect each other (mainly steam affects water flow). In order to further reduce the degree of such influence, this embodiment further designs the structure of the coil 2. Figure 2 As shown, the inner wall of the coil 2 has relatively raised and relatively recessed parts, that is, a plurality of relatively raised flow-guiding protrusions 21 distributed along the circumferential direction are constructed on the inner wall of the coil 22 , and a flow-guiding groove 22 is formed between two adjacent flow-guiding protrusions 21 .

[0039] When the water flows along the inner wall of the coil 2, it will naturally concentrate in the guide groove 22, which can be further relatively away from the steam concentrated at the axial position of the coil 2, reducing the degree of mutual influence between the two. In addition, due to the presence of the guide protrusion 21, the water flow is concentrated in the guide groove 22. Compared with the general circular pipe, the water flow is evenly distributed on the inner wall of the pipe, so that the surface area of ​​the water flow that can contact with the steam is reduced, which can also reduce the degree of mutual influence between the two. In addition, the water flow in the guide groove 22 contacts the bottom and the groove walls on both sides of the guide groove 22. Compared with the general circular pipe, the contact area between the water flow and the pipe is not reduced, so the adhesion of the water flow to the inner wall of the coil 2 is not reduced, which can also further ensure that the flow of the water flow is not excessively affected by the steam.

[0040] In addition, considering that the coil 2 needs to be surrounded by steam and sprayed cooling medium, the coil 2 is preferably a thin-walled tube, so the guide protrusion 21 can be formed by punching inward from the outer tube wall of the coil 2.

[0041] In one embodiment, a plurality of first baffles 4 are disposed in the cooling chamber 12 , and the plurality of first baffles 4 are sequentially distributed along the vertical direction, and the coil 2 is coiled along the interval spaces between the plurality of first baffles 4 .

[0042] Specifically, as shown in the attached figure Figure 1 As shown, a plurality of first baffles 4 are alternately arranged on the inner walls on both sides of the cooling chamber 12 of the tank body 1, and the spacing space between the first baffles 4 is provided for the coil 2 to coil, mainly to extend the flow path of the sprayed cooling medium, thereby extending the contact heat exchange time between the cooling medium and the coil 2, and improving the condensation effect.

[0043] In one embodiment, a plurality of second baffles 5 distributed in sequence along the vertical direction are provided in the cooling chamber 12 , and the top pipe opening of the coil 2 and the vent 111 are both located directly below the lowest second baffle 5 .

[0044] Specifically, as shown in the attached figure Figure 1As shown, the second baffle 5 is arranged in the exhaust chamber 11, and its specific arrangement is similar to that of the first baffle 4. Its main purpose is to extend the flow path, that is, to extend the flow path of instrument air and steam, thereby extending the contact, mixing and heat exchange time between the two airflows, and improving the condensation effect.

[0045] In one embodiment, the top end of the coil 2 faces upward, directly facing the second baffle 5 ; the vent 111 faces obliquely downward, toward the partition separating the exhaust chamber 11 and the cooling chamber 12 .

[0046] Specifically, based on the design of the pipe mouth direction, after the steam and instrument air are input into the exhaust chamber 11, they will not be output directly toward the exhaust outlet, but will collide in the exhaust chamber 11 through the blocking of the corresponding structure, thereby reducing the flow velocity and dispersing the flow direction, so that the steam and instrument air can be mixed more evenly.

[0047] In one embodiment, the top end pipe opening of the coil 2 is configured as a bell mouth, and a raised flow guide member facing the top end pipe opening of the coil 2 is disposed on the lower surface of the second baffle 5 at the bottom.

[0048] Specifically, based on the structural design that the top end of the coil 2 faces upward and directly faces the second baffle 5, the water condensed in the exhaust chamber 11 due to the cooling of the instrument air will adhere to the second baffle. Therefore, by designing the pipe opening of the coil 2 to be trumpet-shaped and providing a guide member directly facing the pipe opening of the coil 2 on the second baffle, the condensed water can be introduced into the coil 2 and merged with the water condensed in the cooling chamber 12 to be collected together. In addition, some water also adheres to the inner wall of the exhaust chamber 11, so an additional discharge port can be provided at the bottom of the exhaust chamber 11 to discharge this part of the water.

[0049] Preferably, the end of the guide member corresponds to the inner wall of the coil 2 , and the guide member extends into the pipe opening of the coil 2 and contacts the inner wall of the coil 2 .

[0050] In one embodiment, the exhaust chamber 11 is configured as a conical structure with a radial dimension gradually decreasing in the vertically upward direction, and an exhaust port 112 is configured at the top of the exhaust chamber 11 .

[0051] In one embodiment, a diversion and drainage valve 6 is provided on the intermediate pipe, and the output end of the diversion and drainage valve 6 is connected to the deaerator through a pipeline. The water flowing down from the inner wall of the coil 2 will reach the diversion and drainage valve 6 of the intermediate pipe. Therefore, the output end of the diversion and drainage valve 6 can be connected to the deaerator through a pipeline, and then this part of the condensed water (specifically desalted water) is returned to the deaerator for recycling, saving water resources.

[0052] In one embodiment, the cooling medium is desalted water, and the drain port 121 is connected to the deaerator through a pipeline. The cooling medium uses the same desalted water as the internal medium of the deaerator, so that the sprayed desalted water can carry heat and return to the deaerator through the drain port 121 for recycling after heat exchange with the steam in the coil, thereby increasing the feed water temperature of the deaerator, thereby saving water resources and recovering heat.

[0053] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0054] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.

Claims

1. A deaerator steam whitening elimination device, characterized in that: include: The tank body has an internal space divided into an upper exhaust chamber and a lower cooling chamber, a vent for connecting an instrument air line is provided on the pipe wall of the exhaust chamber, and a drain port is provided at the bottom of the cooling chamber; A coil, which is arranged in the cooling chamber, wherein the bottom end of the coil is connected to the exhaust port of the deaerator through an intermediate pipeline, and the top end extends into the exhaust chamber; as well as A spray assembly is arranged at the top of the cooling chamber and can spray cooling medium to the coil in the cooling chamber.

2. The deaerator steam whitening elimination device according to claim 1, characterized in that: The coiled tube is constructed as a spiral coiled structure or an S-shaped coiled structure.

3. The deaerator steam whitening elimination device according to claim 2, characterized in that: For the coil having an S-shaped winding structure, a plurality of relatively protruding flow-guiding protrusions distributed along the circumferential direction are configured on the inner wall of the coil. The flow-guiding protrusions extend continuously along the axial direction of the coil, and a flow-guiding groove is formed between two adjacent flow-guiding protrusions.

4. The deaerator steam whitening elimination device according to claim 1, characterized in that: A plurality of first baffles are arranged in the cooling chamber, and the plurality of first baffles are distributed in sequence along the vertical direction, and the coil is coiled along the spacing spaces between the plurality of first baffles.

5. The deaerator steam whitening elimination device according to claim 1, characterized in that: The cooling chamber is provided with a plurality of second baffles distributed in sequence along the vertical direction, and the top pipe opening of the coil and the vent are both located directly below the second baffle at the bottom.

6. The deaerator steam whitening elimination device according to claim 5, characterized in that: The top end of the coil faces upward, directly facing the second baffle; the vent is inclined downward, toward the partition separating the exhaust chamber and the cooling chamber.

7. The deaerator steam whitening elimination device according to claim 6, characterized in that: The top pipe opening of the coil is configured as a bell mouth, and the lower surface of the second baffle at the bottom is provided with a raised flow guide member facing the top pipe opening of the coil.

8. The deaerator steam whitening elimination device according to claim 1, characterized in that: The exhaust chamber is configured as a conical structure with a radial dimension gradually decreasing in a vertically upward direction, and an exhaust port is configured at the top of the exhaust chamber.

9. The deaerator steam whitening elimination device according to claim 1, characterized in that: The intermediate pipeline is provided with a diversion and drainage valve, and the output end of the diversion and drainage valve is connected with the deaerator through a pipeline.

10. The deaerator steam whitening elimination device according to claim 1, characterized in that: The cooling medium is desalted water, and the drain port is connected to the deaerator through a pipeline.

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