Dilatation separation device of drain flash tank

Abstract

The utility model discloses an expansion separation device of a drain flash tank, which belongs to the technical field of drain expansion devices and is characterized by comprising a first-stage expansion cavity, a separation component is arranged at the bottom of the first-stage expansion cavity, and a rectifying component is arranged on the outer side of the first-stage expansion cavity. And the separation assembly comprises a transition connecting pipe movably connected to the bottom of the first-stage capacity expansion cavity, the bottom of the transition connecting pipe communicates with a second-stage capacity expansion cavity, and the top of the second-stage capacity expansion cavity is fixedly connected with a fixing frame. The problems that secondary capacity expansion of drained water cannot be achieved, the depressurization degree of the capacity expansion of the drained water is limited, steam and water cannot be fully separated, the energy recycling efficiency is influenced, the separated steam is inconvenient to rectify and purify, the flow speed and the flow direction of the separated steam are disordered, and the purity of follow-up steam is influenced are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of hydrophobic expansion device, especially to a hydrophobic expansion vessel expansion separation device. BACKGROUND

[0002] In the industrial field of power plants, chemical plants and the like, many process will produce high temperature and high pressure hydrophobic, these hydrophobic if direct discharge, not only will cause the waste of water resources, still can lose a large amount of heat energy, the starting process of boiler will produce starting hydrophobic quantity, and the over heater hydrophobic in the scope of boiler body, reheater hydrophobic and the like multiple water, hydrophobic expansion vessel expansion separation device can carry out expansion and decompression to the hydrophobic in pressure hydrophobic pipeline, separates steam and hydrophobic, steam can be introduced into heat exchanger or deaerator, fully utilizes its heat energy, and hydrophobic is introduced into hydrophobic tank and is regularly sent into feedwater system, realizes the recycling of energy.

[0003] Generally, small and medium-sized units adopt vertical hydrophobic expansion vessel, but with the increase of hydrophobic quantity of unit operation, the volume of vertical hydrophobic expansion vessel cannot meet the requirements of power plant, the internal space of vertical hydrophobic expansion vessel is narrow, cannot uniformly decompress and reduce the temperature of the entering hydrophobic, leads to the pressure and temperature of part of hydrophobic and steam are still very high, causes damage and security risk to hydrophobic expansion vessel and downstream equipment, the spray device cannot adjust flow in real time according to demand, causes the waste of cooling water.

[0004] The existing patent (announcement number: CN216591668U) a horizontal hydrophobic expansion vessel is evenly divided into 2 branches from a main stem, forms two water spraying pipelines and is laid flat in the upper part of the internal cylinder of the hydrophobic expansion vessel, a support rib plate is arranged above each pipeline and is welded and fixed with the inner wall of the cylinder to prevent pipeline vibration, the spray area, the number of openings and the size of the opening diameter of the temperature reducing spray device are determined through the optimization calculation of the characteristics of the water spraying pipe, the droplet diameter and the atomization area, a 150-degree sector-shaped spray hole is formed in the vertical direction below the water guide pipe on the water guide pipe, the total area of the spray hole is greater than the cross-sectional area of the water guide pipe, the low-temperature temperature reducing water forms a misty water film under a certain pressure through the small hole, directly contacts and exchanges heat with the high-temperature steam water, the steam is discharged from the steam outlet, and the hydrophobic after temperature reduction is discharged from the condensate water outlet, the water spraying pipe structure of the scheme increases the contact coverage area of the steam, hydrophobic and low-temperature temperature reducing water spray, and realizes uniform temperature reduction of the hydrophobic and steam.

[0005] In view of the above problems, the existing patent provides a solution, the existing hydrophobic expansion vessel expansion separation device usually only has a simple expansion structure, cannot realize secondary expansion of hydrophobic, leads to limited expansion and decompression degree of hydrophobic, steam and water cannot be fully separated, affects the energy recovery and utilization efficiency, and the separated steam is not convenient for rectification and purification treatment, leads to the flow rate and flow direction of the separated steam being disorderly, and affects the purity of subsequent steam.

[0006] To address this, a hydrophobic expansion and separation device is proposed. Utility Model Content

[0007] The purpose of this invention is to provide a hydrophobic expansion container separation device that solves the problems of existing hydrophobic expansion container separation devices, which typically only have a simple expansion structure and cannot achieve secondary expansion of the hydrophobic material. This results in limited pressure reduction during hydrophobic expansion, insufficient separation of steam and water, and reduced energy recovery efficiency. Furthermore, it is not convenient to rectify and purify the separated steam, leading to disordered steam flow rate and direction, which affects the purity of subsequent steam.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a hydrophobic expansion container expansion and separation device, comprising a primary expansion cavity, a separation component disposed at the bottom of the primary expansion cavity, and a rectifier component disposed on the outer side of the primary expansion cavity;

[0009] The separation assembly includes a transition connecting pipe movably connected to the bottom of the primary expansion chamber. The bottom of the transition connecting pipe is connected to a secondary expansion chamber. A fixing frame is fixedly connected to the top of the secondary expansion chamber. A reverse swirl vane is fixedly connected inside the fixing frame. A conveying pipe is connected to the inner side of the secondary expansion chamber. A steam dispersion plate is fixedly connected inside the conveying pipe. A drain pipe is connected to the bottom of the secondary expansion chamber. A control valve is provided on the outer side of the drain pipe.

[0010] Preferably, the rectifier assembly includes a fixed base fixedly connected to the outside of the primary expansion cavity, the outside of the fixed base is fixedly connected to the rectifier cavity, the top of the rectifier cavity is connected to a steam outlet pipe, and the bottom of the rectifier cavity is fixedly connected to a rectifier plate assembly.

[0011] Preferably, a condensate collection tank is fixedly connected inside the rectifier cavity, and a drain pipe is connected to the bottom of the condensate collection tank. A condensate discharge tank is fixedly connected to the outside of the rectifier cavity, and the drain pipe is located at the top of the condensate discharge tank.

[0012] Preferably, a demisting mesh is fixedly connected inside the rectifier cavity, and the demisting mesh is located at the top of the condensate collection tank.

[0013] Preferably, the primary expansion cavity is fixedly connected to a top seat, the top of the top seat is fixedly connected to a positive swirl vane, the bottom of the primary expansion cavity is connected to a steam riser pipe, and the steam riser pipe is connected to the rectifier cavity.

[0014] Preferably, the inside of the secondary expansion cavity is provided with a pressure sensor, the outside of the pressure sensor is electrically connected with a wire, and the outside of the wire is electrically connected with a signal transmitter.

[0015] Preferably, the outside of the primary expansion cavity is communicated with an inlet flow guide pipe, and the outside of the inlet flow guide pipe is provided with a one-way valve.

[0016] Preferably, the bottom of the secondary expansion cavity is fixedly connected with a supporting leg, and the bottom of the supporting leg is fixedly connected with a rubber foot pad.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The application can perform secondary expansion and separation on the preliminarily expanded water vapor, greatly improves the degree of water vapor expansion and pressure reduction, makes the steam and water further separate under the action of centrifugal force, improves steam purity and thoroughness of water vapor separation, reduces water carried in steam, and improves energy recycling efficiency.

[0019] 2. The application can perform rectification and speed reduction on the separated steam, makes the steam flow rate and flow direction more uniform and stable, reduces turbulence, facilitates subsequent capture of small water droplets carried in steam, further improves steam purity, and after rectification and demisting treatment, the steam can better meet the use requirements in industrial production, can improve heat exchange efficiency, and avoids corrosion and damage of equipment caused by water carried in steam. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is an overall structural view of the water vapor expansion and separation device of the utility model;

[0021] Figure 2 It is a sectional view of the separation assembly of the utility model;

[0022] Figure 3 It is a sectional view of the rectification assembly of the utility model;

[0023] Figure 4 It is a sectional view of the primary expansion cavity of the utility model;

[0024] Figure 5 It is a structural schematic view of the pressure sensor of the utility model.

[0025] In the figure, 1, primary expansion cavity; 2, top seat; 3, forward rotating flow vane; 4, separation assembly; 401, transition connecting pipe; 402, secondary expansion cavity; 403, fixed frame; 404, reverse rotating flow vane; 405, conveying pipe; 406, steam dispersion plate; 407, drain pipe; 408, control valve; 5, rectification assembly; 501, fixed seat; 502, rectification cavity; 503, steam outlet pipe; 504, rectification plate group; 505, condensate water collecting groove; 506, drainage pipe; 507, condensate water discharge groove; 508, demisting screen; 6, steam rising pipe; 7, pressure sensor; 8, wire; 9, signal transmitter; 10, inlet flow guide pipe; 11, one-way valve; 12, support leg; 13, rubber foot pad. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] Please refer to Figures 1-5 The utility model provides technical schemes:

[0028] A hydrophobic expander expansion separation device, including primary expansion cavity 1, the bottom of primary expansion cavity 1 is provided with separation assembly 4, the outside of primary expansion cavity 1 is provided with rectification assembly 5;

[0029] Separation assembly 4 includes transition connecting pipe 401 movably connected to the bottom of primary expansion cavity 1, the bottom of transition connecting pipe 401 is communicated with secondary expansion cavity 402, the top of secondary expansion cavity 402 is fixedly connected with fixed frame 403, the inside of fixed frame 403 is fixedly connected with reverse rotating flow vane 404, the inside of secondary expansion cavity 402 is communicated with conveying pipe 405, the inside of conveying pipe 405 is fixedly connected with steam dispersion plate 406, the bottom of secondary expansion cavity 402 is communicated with drain pipe 407, the outside of drain pipe 407 is provided with control valve 408.

[0030] In the embodiment, the reverse swirl vanes 404 inside the top fixing frame 403 of the secondary expansion cavity 402 further process the entering water and steam. The reverse swirl vanes 404 are opposite in rotation direction to the positive swirl vanes 3, and again apply a swirl action to the water and steam, which makes the mixture of water and steam form a more intense swirl motion in the secondary expansion cavity 402, further enhancing the separation effect. In this process, the steam continues to gather in the central area and move upward under the action of centrifugal force, while the water is more effectively thrown to the cavity wall and flows into the drain pipe 407 at the bottom of the secondary expansion cavity 402. At the same time, part of the steam will adhere to the water due to the interface between the water and the steam. The delivery pipe 405 is connected to the inside of the secondary expansion cavity 402, which provides a channel for the recovery of the adhering steam. When the adhering steam approaches the inlet of the delivery pipe 405, the steam dispersion plate 406 can uniformly disperse the entering steam, preventing local accumulation of steam and improving the efficiency of the adhering steam entering the delivery pipe 405 and being recovered. The control valve 408 outside the drain pipe 407 can accurately control the flow and speed of the water discharge according to actual needs. The operator can control the opening of the control valve 408 according to the pressure, liquid level and other parameters inside the secondary expansion cavity 402 to ensure the stability of the pressure inside the secondary expansion cavity 402, and reasonably discharge the water. When the internal pressure of the device is too high, the opening of the control valve 408 can be appropriately increased to speed up the water discharge speed. When the pressure is low, the opening of the control valve 408 can be reduced to maintain the pressure balance inside the device.

[0031] Specifically, as shown in Figure 3 , the rectification assembly 5 includes a fixed seat 501 fixedly connected to the outside of the primary expansion cavity 1. The outside of the fixed seat 501 is fixedly connected with a rectification cavity 502. The top of the rectification cavity 502 is connected with a steam outlet pipe 503. The bottom of the rectification cavity 502 is fixedly connected with a rectification plate group 504.

[0032] Specifically, as shown in Figure 3 , the rectification cavity 502 is fixedly connected with a condensate collection groove 505 inside. The bottom of the condensate collection groove 505 is connected with a drainage pipe 506. The outside of the rectification cavity 502 is fixedly connected with a condensate discharge groove 507. The drainage pipe 506 is located at the top of the condensate discharge groove 507.

[0033] Specifically, as shown in Figure 3 , the rectification cavity 502 is fixedly connected with a demisting mesh 508 inside. The demisting mesh 508 is located at the top of the condensate collection groove 505.

[0034] In this embodiment: in the process of rectification, the steam will first encounter the rectifier plate group 504, which is fixed at the bottom of the rectification cavity 502, which is to preliminarily rectify and decelerate the steam. The rectifier plate group 504 is composed of multiple layers of specially designed metal plates. When the steam passes through these metal plates, its flow rate and flow direction will change, becoming more uniform and stable, reducing the turbulence of the steam, which is beneficial to subsequent demisting and condensate separation work. Inside the rectification cavity 502, the demisting screen 508 is located at the top of the condensate collection tank 505, playing a crucial role. The demisting screen 508 is woven from fine metal wires, which can effectively capture the tiny water droplets carried by the steam. When the steam passes through the demisting screen 508, the water droplets will be intercepted on the screen and then gather into larger droplets under the action of gravity, falling into the condensate collection tank 505 below, thereby improving the purity of the steam, reducing the water content in the steam, and making the final discharged steam better meet the use requirements in industrial production. At the same time, the drain pipe 506 connected to the bottom of the condensate collection tank 505 is responsible for guiding the collected condensate to the condensate discharge tank 507. The drain pipe 506 is located at the top of the condensate discharge tank 507 and uses gravity to allow the condensate to flow naturally into the discharge tank. The condensate discharge tank 507 is fixed outside the rectification cavity 502, and the collected condensate can be concentrated and recycled through the discharge tank to achieve effective collection and treatment of the condensate, avoiding the re-mixing of the condensate into the steam.

[0035] Specifically, as shown in Figure 4 The top of the top seat 2 is fixedly connected with a forward rotating flow blade 3. The bottom of the first expansion cavity 1 is communicated with a steam rising pipe 6, and the steam rising pipe 6 is communicated with the rectification cavity 502.

[0036] Specifically, as shown in Figure 5 The inside of the second expansion cavity 402 is provided with a pressure sensor 7, the outside of the pressure sensor 7 is electrically connected with a wire 8, and the outside of the wire 8 is electrically connected with a signal transmitter 9.

[0037] In the embodiment: by setting the seat, the positive rotational flow blade 3 and the steam rising pipe 6, when the device is running, the high-temperature and high-pressure water is guided into the first expansion cavity 1 through the inlet guide pipe 10, the top seat 2 fixed on the first expansion cavity 1 guides the water to form a rotational flow by the positive rotational flow blade 3 on the top, which promotes the water to preliminarily separate under the action of centrifugal force, the steam moves upward and the water moves downward, then the steam enters the rectifying cavity 502 through the steam rising pipe 6 at the bottom of the first expansion cavity 1, the positive rotational flow blade 3 can make the water quickly form a rotational flow, which strengthens the separation effect of the steam and the water in the first expansion cavity 1 and improves the separation efficiency, the steam rising pipe 6 connects the first expansion cavity 1 and the rectifying cavity 502, which provides a stable transmission path for the steam, ensures the steam to smoothly enter the subsequent rectifying link, reduces the energy loss and resistance of the steam in the transmission process, makes the whole device run more smoothly, by setting the pressure sensor 7, the wire 8 and the signal transmitter 9, the pressure sensor 7 inside the second expansion cavity 402 monitors the pressure change in the cavity at all times, the pressure sensor 7 is electrically connected with the signal transmitter 9 through the wire 8, when the pressure sensor 7 detects abnormal pressure, it will transmit the signal to the signal transmitter 9 through the wire 8, and the signal transmitter 9 will transmit the signal to the control system, so that the operator can find the problem in time.

[0038] Specifically, as shown in Figure 4 the outer side of the first expansion cavity 1 is connected with the inlet guide pipe 10, and the outer side of the inlet guide pipe 10 is provided with the one-way valve 11.

[0039] Specifically, as shown in Figure 1 the bottom of the second expansion cavity 402 is fixedly connected with the supporting leg 12, and the bottom of the supporting leg 12 is fixedly connected with the rubber foot pad 13.

[0040] In the embodiment: by setting the inlet guide pipe 10 and the one-way valve 11, the one-way valve 11 effectively prevents the backflow phenomenon, ensures the water to enter the first expansion cavity 1 in the predetermined direction, avoids the impact and damage of backflow to the equipment, maintains the stability of the internal pressure of the device, improves the reliability and safety of the device operation, ensures the smooth progress of the whole water expansion and separation process, by setting the supporting leg 12 and the rubber foot pad 13, the supporting leg 12 provides stable support for the second expansion cavity 402, ensures the stability of the device during operation, prevents the shaking from affecting the separation effect, the rubber foot pad 13 can play a shock-absorbing and buffering role, reduces the vibration generated during the operation of the equipment from being transmitted to the surrounding, reduces the noise, protects the equipment itself and the surrounding facilities, at the same time, increases the friction between the supporting leg 12 and the placement plane, prevents the device from sliding, and improves the stability of the device.

[0041] Working principle: in the process of using the hydrophobic expander to expand the separation device, first of all, the high temperature and high pressure hydrophobic is introduced into the first expansion cavity 1 through the inlet guide pipe 10, the outer side of the inlet guide pipe 10 is provided with a one-way valve 11, which only allows the hydrophobic to flow into the first expansion cavity 1 in one direction, effectively preventing the backflow of steam and hydrophobic, ensuring the stability and safety of the whole device, after entering the first expansion cavity 1, the hydrophobic begins to rotate under the action of the positive swirl blade 3 at the top of the top seat 2, the special design of the positive swirl blade 3 makes the hydrophobic move to the cavity wall under the action of centrifugal force, and the separation of steam and water is realized initially, the steam is relatively light and begins to move upward, while the heavier water flows downward along the cavity wall, as the hydrophobic moves downward in the first expansion cavity 1, they enter the second expansion cavity 402 through the transition connecting pipe 401, the transition connecting pipe 401 is bolted and fixed with the bottom of the first expansion cavity 1 by bolts, so as to facilitate the installation, disassembly and maintenance of the device, the reverse swirl blade 404 in the internal fixed frame 403 of the second expansion cavity 402 top, further processes the entering hydrophobic and steam, the reverse swirl blade 404 is opposite to the rotation direction of the positive swirl blade 3, which applies swirl effect to the hydrophobic and steam again, which makes the mixture of steam and water form more intense swirl motion in the second expansion cavity 402, further enhancing the separation effect, in this process, the steam continues to gather in the central area and moves upward under the action of centrifugal force, while the water is more effectively thrown to the cavity wall and flows into the drain pipe 407 at the bottom of the second expansion cavity 402, at the same time when the water flows along the wall, due to the existence of the interface between water and steam, part of the steam will adhere to the water, and the conveying pipe 405 is connected to the inside of the second expansion cavity 402, which provides a channel for the recovery of the adhered steam, when the adhered steam approaches the inlet of the conveying pipe 405, the steam dispersion plate 406 can make the entering steam disperse uniformly, prevent local steam aggregation, and improve the efficiency of adhered steam entering the conveying pipe 405 and being recovered, the control valve 408 outside the drain pipe 407 can accurately control the flow and speed of drainage according to actual needs, the steam separated from the second expansion cavity 402 enters the rectification cavity 502 through the steam rising pipe 6 and the conveying pipe 405 respectively, in the process of rectification, the steam first encounters the rectification plate group 504, which is fixed at the bottom of the rectification cavity 502, its function is to preliminarily rectify and slow down the steam, the rectification plate group 504 is composed of multiple layers of specially designed metal plates, when the steam passes through these metal plates, its flow rate and flow direction will change, becoming more uniform and stable, reducing the turbulence of the steam, which is conducive to the subsequent demisting and condensate separation work, in the rectification cavity 502, the demisting wire mesh 508 is located at the top of the condensate collection groove 505, which plays a crucial role, the demisting wire mesh 508 is woven by fine metal wires, which can effectively capture the tiny water droplets carried in the steam, when the steam passes through the demisting wire mesh 508,The water droplets are intercepted on the wire mesh, and then gathered into larger water droplets under the action of gravity and fall into the condensate water collecting groove 505, so as to improve the purity of the steam, reduce the water content in the steam, and make the finally discharged steam better meet the use requirements in industrial production. Meanwhile, the drainage pipe 506 communicated with the bottom of the condensate water collecting groove 505 is responsible for guiding the collected condensate water to the condensate water discharge groove 507. The drainage pipe 506 is located at the top of the condensate water discharge groove 507, and the condensate water is naturally flowed into the discharge groove by the action of gravity. The condensate water discharge groove 507 is fixed outside the rectifying cavity 502. The collected condensate water can be concentrated and recycled through the discharge groove, so as to realize the effective collection and treatment of the condensate water, and avoid the condensate water from mixing into the steam again.

[0042] The above is only a preferred embodiment of the present application, and is not intended to limit the present application. Any modification, equivalent replacement and improvement within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A hydrophobic flash tank separation device comprising a primary flash chamber (1), characterised in that: The bottom of the primary expansion cavity (1) is provided with a separation assembly (4), and the outer side of the primary expansion cavity (1) is provided with a rectifying assembly (5); The separation assembly (4) comprises a transition connecting pipe (401) movably connected to the bottom of the primary expansion cavity (1), the bottom of the transition connecting pipe (401) is communicated with a secondary expansion cavity (402), the top of the secondary expansion cavity (402) is fixedly connected with a fixed frame (403), the inside of the fixed frame (403) is fixedly connected with a reverse cyclone blade (404), the inner side of the secondary expansion cavity (402) is communicated with a conveying pipe (405), the inside of the conveying pipe (405) is fixedly connected with a steam dispersion plate (406), the bottom of the secondary expansion cavity (402) is communicated with a drain pipe (407), and the outer side of the drain pipe (407) is provided with a control valve (408).

2. A hydrophobic expander separation device according to claim 1, wherein: The rectifying assembly (5) comprises a fixed seat (501) fixedly connected to the outer side of the primary expansion cavity (1), the outer side of the fixed seat (501) is fixedly connected with a rectifying cavity (502), the top of the rectifying cavity (502) is communicated with a steam outlet pipe (503), and the bottom of the rectifying cavity (502) is fixedly connected with a rectifying plate group (504).

3. A hydrophobic flash tank separation device according to claim 2, wherein: The inside of the rectifying cavity (502) is fixedly connected with a condensate water collecting groove (505), the bottom of the condensate water collecting groove (505) is communicated with a drainage pipe (506), the outer side of the rectifying cavity (502) is fixedly connected with a condensate water discharge groove (507), and the drainage pipe (506) is located at the top of the condensate water discharge groove (507).

4. A hydrophobic vessel expansion separation device according to claim 3, wherein: The inside of the rectifying cavity (502) is fixedly connected with a demisting screen (508), and the demisting screen (508) is located at the top of the condensate water collecting groove (505).

5. A hydrophobic vessel expansion separation device according to claim 2, wherein: The primary expansion cavity (1) is fixedly connected with a top seat (2), the top of the top seat (2) is fixedly connected with a forward cyclone blade (3), the bottom of the primary expansion cavity (1) is communicated with a steam rising pipe (6), and the steam rising pipe (6) is communicated with the rectifying cavity (502).

6. A hydrophobic vessel expansion separation device according to claim 1, wherein: The inside of the secondary expansion cavity (402) is provided with a pressure sensor (7), the outer side of the pressure sensor (7) is electrically connected with a wire (8), and the outer side of the wire (8) is electrically connected with a signal transmitter (9).

7. A hydrophobic vessel expansion separation device according to claim 1, wherein: The outer side of the primary expansion cavity (1) is communicated with an inlet flow guide pipe (10), and the outer side of the inlet flow guide pipe (10) is provided with a one-way valve (11).

8. A hydrophobic vessel expansion separation device according to claim 1, wherein: The bottom of the secondary expansion cavity (402) is fixedly connected with a supporting leg (12), and the bottom of the supporting leg (12) is fixedly connected with a rubber foot pad (13).

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