Flash heat recovery device

Abstract

The present invention discloses a flash evaporation waste heat recovery device, comprising a horizontal tank body, a steam outlet assembly and a baffle assembly, wherein the horizontal tank body defines a tank cavity, and the horizontal tank body is provided with a water inlet connected to the tank cavity; a plurality of high-pressure and high-temperature water inlets connected to the tank cavity are arranged at intervals along the length direction in the middle of one side wall of the horizontal tank body; the steam outlet assembly forms a steam outflow channel, and the steam outlet assembly is installed on the top of the horizontal tank body; there are multiple baffle assemblies, and the multiple baffle assemblies are arranged in the tank cavity and correspond one-to-one with the multiple high-pressure and high-temperature water inlets, and the multiple baffle assemblies and the side wall of the horizontal tank body jointly define a buffer chamber, and the multiple high-pressure and high-temperature water inlets are connected one-to-one with the multiple buffer chambers, and the sides of the multiple baffle assemblies are all provided with water outlets. The flash evaporation waste heat recovery device of the present invention can recover waste heat from high-pressure and high-temperature water, realize energy recycling, have good gas-liquid separation effect, high flash evaporation efficiency, simple structure and convenient adjustment.

Description

Technical Field

[0001] The present invention relates to the technical field of flash evaporation waste heat recovery, and in particular to a flash evaporation waste heat recovery device. Background Art

[0002] During the polysilicon reduction furnace production process, cooling water is often used to cool the furnace body. To ensure the recycling of cooling water, secondary water or air cooling is often used for cooling without waste heat recovery, resulting in energy waste. Given that the front-end processes such as raw material purification in process production require a large amount of low-pressure steam, in order to achieve heat balance and comprehensive energy utilization in process production, a flash evaporation device can be set up to recover waste heat from high-temperature cooling water. In this way, the heat cycle in the process system can be effectively realized, thereby reducing the overall energy consumption of process production, reducing product production costs, and improving the overall product benefits.

[0003] Existing flash evaporation systems are primarily used in geothermal power generation and to recover boiler wastewater in thermal power plants. These are typically designed on a small scale, typically employing a vertical flash tank and a gas-liquid separator in series to achieve the steam flash process. Existing flash tanks are typically small-scale and operate in a single state, with few design examples for large, integrated systems.

[0004] Vertical flash evaporation devices are installed vertically, and the material enters the flash tank directly for flash evaporation. However, due to the limited flash evaporation space, the gas and liquid disturbance is large, the flash evaporation efficiency is low, and the output steam quality is poor. In other words, the gas carrying liquid foam moves upward, the gas-liquid contact is large, the liquid foam is difficult to sink naturally, and the gas contains water. It is usually necessary to connect a gas-liquid separation device in series to improve the steam quality. For this reason, some manufacturers use a rotary water inlet structure design on the inner wall of the tank. The principle is that the high-temperature material (water) enters the flash tank through the liquid inlet along the tangent direction of the tank body. Under the action of centrifugal force, it rotates along the inner wall of the tank. As the material pressure decreases, the steam produced by the flash evaporation is discharged from the top of the tank body. Although this device enhances the flash evaporation efficiency, the overall efficiency is low. In addition, because the liquid enters the tank body along the tangent direction, the flow rate is fast, which is particularly serious for working conditions containing impurities. The tank body is also severely worn. In addition, this flash tank has the problem of incomplete gas-liquid separation. Summary of the Invention

[0005] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a flash evaporation waste heat recovery device capable of recovering waste heat from high-pressure, high-temperature water, achieving energy recycling, achieving excellent gas-liquid separation, high flash evaporation efficiency, simple structure, and easy adjustment.

[0006] The flash evaporation waste heat recovery device according to an embodiment of the present invention includes:

[0007] A horizontal tank body defines a tank cavity, and is provided with a water inlet communicating with the tank cavity. The water inlet is used for adding water during pre-operation commissioning and replenishing water during operation to compensate for a decrease in the amount of water in the tank cavity due to flash steam. A plurality of high-pressure and high-temperature water inlets communicating with the tank cavity are arranged at intervals along the length of a side wall of the horizontal tank body in the middle thereof.

[0008] a steam outlet assembly, wherein the steam outlet assembly is formed with a steam outflow channel, and the steam outlet assembly is installed on the top of the horizontal tank body so that the steam outflow channel is communicated with the tank cavity;

[0009] Baffle assemblies, there are multiple baffle assemblies, multiple baffle assemblies are arranged in the tank cavity and correspond one-to-one with the multiple high-pressure and high-temperature water inlets, multiple baffle assemblies and the side wall of the horizontal tank body jointly define a buffer chamber, multiple high-pressure and high-temperature water inlets are connected one-to-one with the multiple buffer chambers, and the sides of multiple baffle assemblies are provided with water flow outlets, the lowest part of the water flow outlets is higher than the highest part of the high-pressure and high-temperature water inlets, so that the external high-pressure and high-temperature water enters the buffer chamber from the high-pressure and high-temperature water inlet and then enters the tank cavity from the water flow outlet.

[0010] According to the flash evaporation waste heat recovery device of the embodiment of the present invention, before the flash evaporation waste heat recovery device is operated, low-pressure and low-temperature water is added to the tank cavity through the water inlet, and when the water level reaches the predetermined water level, the addition of water to the tank cavity is stopped; during the operation of the flash evaporation waste heat recovery device, the external high-pressure and high-temperature water enters the buffer chamber through multiple high-pressure and high-temperature water inlets and then enters the tank cavity. Due to the action of the baffle assembly, the high-pressure and high-temperature water is deflected and accumulated in the buffer chamber, and is discharged into the tank cavity through the water outlet on the upper part of the baffle assembly, thereby reducing the speed of the external high-pressure and high-temperature water before entering the tank cavity, alleviating the impact corrosion on the horizontal tank body caused by the excessively high-pressure and high-temperature water flow rate, reducing the disturbance of the liquid in the tank cavity, thereby improving the gas-liquid separation effect, and preventing the formation of vortexes. Vortex, avoiding cavitation damage to the pump; since the high-pressure and high-temperature water is reduced in pressure by the pressure reducing valve before entering the tank cavity, the high-pressure and high-temperature water can boil at a lower temperature after entering the tank cavity, and part of the high-pressure and high-temperature water quickly vaporizes to form steam. Moreover, since the flash evaporation space provided by the horizontal tank body is large, the flash evaporation efficiency is improved, and the steam rises to the top of the tank cavity and is discharged from the steam outflow channel. The liquid in the tank cavity is separated into gas and liquid in the upper area of the tank cavity, thereby effectively reducing the entrainment of gas with liquid, improving the quality of steam and facilitating steam collection; when the water level in the tank cavity is lowered, water is added to the inside of the tank cavity through the water inlet, so that the water level inside the tank cavity is always maintained within the predetermined water level range, which is easy to adjust, thereby ensuring the long-term and stable operation of the flash evaporation waste heat recovery device. In summary, the flash evaporation waste heat recovery device of the embodiment of the present invention realizes the recovery of waste heat from high-pressure and high-temperature water, realizes energy recycling, has good gas-liquid separation effect, high flash evaporation efficiency, simple structure and convenient adjustment.

[0011] According to one embodiment of the present invention, each baffle assembly includes a top baffle, a bottom baffle and a side baffle. The top baffle, the bottom baffle, the side baffle and a side wall of the horizontal tank body together form the buffer chamber, and the side baffle is provided with the water outlet.

[0012] According to a further embodiment of the present invention, the side baffle includes a first side baffle, a second side baffle and a third side baffle connected in sequence, wherein the first side baffle and the third side baffle are opposite to each other, the second side baffle is opposite to one side wall of the horizontal tank body, and the water outlet is provided on the second side baffle.

[0013] According to one embodiment of the present invention, a plurality of hot water outlets are arranged on the bottom wall of the horizontal tank body at intervals along the length direction, so that the water in the tank cavity can be discharged through the hot water outlets and returned to the process for recycling.

[0014] According to a further embodiment of the present invention, a plurality of circular suction assemblies are further included, and the plurality of circular suction assemblies are located in the tank cavity and are arranged at one end of the plurality of hot water outlets in a one-to-one correspondence.

[0015] According to a further embodiment of the present invention, each of the annular suction components includes a top plate and a plurality of rib plates, the plurality of rib plates are vertically arranged, one vertical side end edges of the plurality of rib plates intersect and the other vertical side ends of the plurality of rib plates are spaced apart in the annular direction, the top ends of the plurality of rib plates are fixed to the top plate, and the bottom ends of the plurality of rib plates extend into one end of the hot water outlet.

[0016] According to a further embodiment of the present invention, there are four ribs, and one vertical side end of the four ribs intersects so that the four ribs are distributed in a cross shape, the top ends of the four ribs are fixed to the top plate, and the bottom ends of the four ribs extend into one end of the hot water outlet.

[0017] According to a further embodiment of the present invention, it also includes a return pipe, which passes through the top of the horizontal tank body and extends into the tank cavity. The return pipe has an upper inlet and a lower outlet. The upper inlet of the return pipe is used to communicate with the hot water outlet through an external pump; the lower outlet of the return pipe is adjacent to the bottom of the horizontal tank body.

[0018] According to one embodiment of the present invention, it also includes a low-pressure steam heating pipe assembly, which includes a low-pressure steam heating pipe and a low-pressure steam delivery pipe. The low-pressure steam heating pipe extends along the length direction of the horizontal tank body and is arranged in the middle and lower part of the tank cavity. The low-pressure steam heating pipe is provided with a plurality of evenly distributed steam distribution ports; one end of the low-pressure steam delivery pipe is located in the tank cavity and is connected to the low-pressure steam heating pipe, and the other end of the low-pressure steam delivery pipe is located outside the horizontal tank body.

[0019] According to one embodiment of the present invention, there are two steam outlet assemblies, which are installed at both ends of the top of the horizontal tank body.

[0020] According to one embodiment of the present invention, a wire mesh demister is provided in the steam outflow channel of each steam outlet assembly.

[0021] According to one embodiment of the present invention, the horizontal tank body is provided with a drug addition port and a sewage discharge port communicated with the tank cavity.

[0022] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0024] Figure 1 This is a structural schematic diagram of one aspect of a flash evaporation waste heat recovery device according to an embodiment of the present invention.

[0025] Figure 2 for Figure 1 Schematic diagram of the structure at point A.

[0026] Figure 3 This is a structural schematic diagram of another orientation of a flash evaporation waste heat recovery device according to an embodiment of the present invention.

[0027] Figure 4 This is a schematic assembly diagram of a high-pressure, high-temperature water inlet and a baffle assembly in one position of a flash evaporation waste heat recovery device according to an embodiment of the present invention.

[0028] Figure 5 This is a schematic assembly diagram of another orientation of the high-pressure, high-temperature water inlet and baffle assembly of the flash evaporation waste heat recovery device according to one embodiment of the present invention.

[0029] Figure 6 This is a schematic assembly diagram of one position of the hot water outlet and the circular suction component of the flash evaporation waste heat recovery device according to one embodiment of the present invention.

[0030] Figure 7 This is a schematic assembly diagram of another orientation of the hot water outlet and the circular suction component of the flash evaporation waste heat recovery device according to one embodiment of the present invention.

[0031] Figure 8 This is a top view of a hot water outlet and a circular suction component of a flash heat recovery device according to an embodiment of the present invention.

[0032] Reference numerals:

[0033] Flash heat recovery device 1000

[0034] Horizontal tank 1

[0035] Tank cavity 101 water inlet 102 high pressure and high temperature water inlet 103 hot water outlet 104 dosing port 105

[0036] Sewage outlet 106 Manhole 107 Liquid level gauge port 108

[0037] Steam outlet assembly 2 straight section 201 contraction section 202

[0038] Baffle assembly 3

[0039] Buffer chamber 301 top baffle 302 bottom baffle 303 side baffle 304 first side baffle 3041

[0040] Second side baffle 3042 Water outlet 30421 Third side baffle 3043

[0041] Ring suction assembly 4 top plate 401 rib plate 402

[0042] Reflux pipe 5

[0043] Low pressure steam heating pipe assembly 6

[0044] Low-pressure steam heating pipe 601, steam distribution port 6011, low-pressure steam delivery pipe 602

[0045] Column 7

[0046] Wire mesh demister 8

[0047] Saddle 9 Fixed saddle 901 Sliding saddle 902

[0048] Liquid level gauge 10 DETAILED DESCRIPTION

[0049] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0050] The following combination Figures 1 to 8 The flash heat recovery device 1000 according to an embodiment of the present invention will be described.

[0051] like Figures 1 to 8 As shown, the flash heat recovery device 1000 according to an embodiment of the present invention includes a horizontal tank body 1, a steam outlet assembly 2 and a baffle assembly 3. The horizontal tank body 1 defines a tank cavity 101. The horizontal tank body 1 is provided with a water inlet 102 connected to the tank cavity 101. The water inlet 102 is used for adding water for commissioning before operation and for replenishing water when the amount of water in the tank cavity 101 is reduced due to flash steam during operation; a plurality of high-pressure and high-temperature water inlets 103 connected to the tank cavity 101 are arranged at intervals along the length direction in the middle of one side wall of the horizontal tank body 1; the steam outlet assembly 2 is formed with a steam outflow channel, and the steam outlet assembly 2 is installed on the top of the horizontal tank body 1 and allows steam to flow out The channel is connected to the tank cavity 101; there are multiple baffle assemblies 3, and the multiple baffle assemblies 3 are arranged in the tank cavity 101 and correspond one-to-one to the multiple high-pressure and high-temperature water inlets 103. The multiple baffle assemblies 3 and the side wall of the horizontal tank body 1 jointly define the buffer chamber 301, and the multiple high-pressure and high-temperature water inlets 103 are connected one-to-one to the multiple buffer chambers 301. The sides of the multiple baffle assemblies 3 are all provided with water outlets 30421, and the lowest part of the water outlet 30421 is higher than the highest part of the high-pressure and high-temperature water inlet 103, so that the external high-pressure and high-temperature water enters the buffer chamber 301 from the high-pressure and high-temperature water inlet 103 and then enters the tank cavity 101 from the water outlet 30421.

[0052] Specifically, the horizontal tank body 1 defines a tank cavity 101, and the horizontal tank body 1 is provided with a water inlet 102 connected to the tank cavity 101. The water inlet 102 is used for adding water for debugging before operation and for replenishing water when the amount of water in the tank cavity 101 is reduced due to flash steam during operation; a plurality of high-pressure and high-temperature water inlets 103 connected to the tank cavity 101 are arranged at intervals along the length direction in the middle of one side wall of the horizontal tank body 1; it can be understood that before the flash evaporation waste heat recovery device 1000 is operated, low-pressure and low-temperature water is added to the tank cavity 101 through the water inlet 102, and when the water level reaches a predetermined position, water is stopped from being added to the tank cavity 101; during the operation of the flash evaporation waste heat recovery device 1000, high-pressure and high-temperature water is introduced into the tank cavity 101 through the plurality of high-pressure and high-temperature water inlets 103. Before entering the tank chamber 101, the high-pressure, high-temperature water is reduced in pressure by a pressure reducing valve. Therefore, upon entering the tank chamber 101, the high-pressure, high-temperature water can boil at a relatively low temperature, with some of the high-pressure, high-temperature water rapidly vaporizing to form steam. Furthermore, the large flash evaporation space provided by the horizontal tank body 1 improves flash evaporation efficiency. Steam rises to the top of the tank chamber 101 and is discharged through the steam outflow channel. The liquid in the tank chamber 101 undergoes gas-liquid separation in the upper region of the tank chamber 101, effectively reducing gas entrainment of liquid, improving steam quality, and facilitating steam collection. When the water level in the tank chamber 101 drops, water is added to the tank chamber 101 through the water inlet 102, maintaining the water level within the tank chamber 101 within a predetermined range. This facilitates adjustment and ensures long-term, stable operation of the flash evaporation waste heat recovery device 1000. Multiple high-pressure, high-temperature water inlets 103 are spaced apart along the length of the horizontal tank body 1 in the middle of one sidewall, ensuring uniform inflow of high-pressure, high-temperature water and high flash evaporation efficiency.

[0053] The steam outlet assembly 2 is formed with a steam outflow channel, and the steam outlet assembly 2 is installed on the top of the horizontal tank body 1 so that the steam outflow channel is connected to the tank cavity 101; it can be understood that when the steam outlet assembly 2 is installed on the top of the horizontal tank body 1, the liquid in the tank cavity 101 is separated into gas and liquid in the upper area of the tank cavity 101, and the steam generated by flash evaporation inside the tank cavity 101 rises to the top of the tank cavity 101 and is discharged from the steam outflow channel, thereby effectively reducing the entrainment of liquid in the gas, improving the steam quality, and facilitating steam collection.

[0054] There are multiple baffle assemblies 3, and the multiple baffle assemblies 3 are arranged in the tank cavity 101 and correspond one-to-one to the multiple high-pressure and high-temperature water inlets 103. The multiple baffle assemblies 3 and the side wall of the horizontal tank body 1 jointly define the buffer chamber 301. The multiple high-pressure and high-temperature water inlets 103 are connected one-to-one with the multiple buffer chambers 301. The sides of the multiple baffle assemblies 3 are all provided with water outlets 30421, and the lowest part of the water outlet 30421 is higher than the highest part of the high-pressure and high-temperature water inlet 103, so that the external high-pressure and high-temperature water enters the buffer chamber 301 from the high-pressure and high-temperature water inlet 103 and then enters the tank cavity 101 from the water outlet 30421. It can be understood that external high-pressure and high-temperature water enters the buffer chamber 301 through the high-pressure and high-temperature water inlet 103. Due to the action of the baffle assembly 3, the high-pressure and high-temperature water is deflected and accumulated in the buffer chamber 301, and then discharged into the tank cavity 101 through the water outlet 30421 on the upper part of the baffle assembly 3. As a result, the speed of the external high-pressure and high-temperature water is reduced before entering the tank cavity 101, alleviating the impact corrosion of the horizontal tank body 1 caused by the high flow rate of high-pressure and high-temperature water, reducing the disturbance of the liquid in the tank cavity 101, thereby improving the gas-liquid separation effect and high steam quality, and preventing the formation of vortices and causing cavitation damage to the pump.

[0055] According to the flash evaporation waste heat recovery device 1000 of the embodiment of the present invention, the working process is as follows: before the flash evaporation waste heat recovery device 1000 is put into operation, low-pressure and low-temperature water is added to the tank cavity 101 through the water inlet 102, and when the water level reaches the predetermined water level, the addition of water to the tank cavity 101 is stopped. During the operation of the flash evaporation waste heat recovery device 1000, the external high-pressure and high-temperature water enters the buffer chamber 301 through multiple high-pressure and high-temperature water inlets 103 and then enters the tank cavity 101. Due to the action of the baffle assembly 3, the high-pressure and high-temperature water is deflected and accumulated in the buffer chamber 301, and then discharged into the tank cavity 101 through the water outlet 30421 on the upper part of the baffle assembly 3, thereby reducing the speed of the external high-pressure and high-temperature water before entering the tank cavity 101, alleviating the impact corrosion on the horizontal tank body 1 caused by the excessively high-pressure and high-temperature water flow rate, and reducing the disturbance of the liquid in the tank cavity 101, so as to improve the gas-liquid The separation effect is improved, and the formation of vortexes is prevented, so as to avoid cavitation damage to the pump; since the high-pressure and high-temperature water is reduced in pressure by the pressure reducing valve before entering the tank cavity 101, the high-pressure and high-temperature water can boil at a lower temperature after entering the tank cavity 101, and part of the high-pressure and high-temperature water is rapidly vaporized to form steam. Moreover, since the flash evaporation space provided by the horizontal tank body 1 is large, the flash evaporation efficiency is improved, and the steam rises to the top of the tank cavity 101 and is discharged from the steam outflow channel. The liquid in the tank cavity 101 is separated into gas and liquid in the upper area of the tank cavity 101, thereby effectively reducing the entrainment of liquid by gas, improving the steam quality and facilitating steam collection; when the water level in the tank cavity 101 is lowered, water is added to the inside of the tank cavity 101 through the water inlet 102, so that the water level in the tank cavity 101 is always maintained within the predetermined water level range, which is convenient to adjust, thereby ensuring the long-term and stable operation of the flash evaporation waste heat recovery device 1000. In summary, the flash evaporation waste heat recovery device 1000 of the embodiment of the present invention can recover waste heat from high-pressure and high-temperature water, realize energy recycling, have good gas-liquid separation effect, high flash evaporation efficiency, simple structure and easy adjustment.

[0056] According to one embodiment of the present invention, each baffle assembly 3 includes a top baffle 302, a bottom baffle 303 and a side baffle 304. The top baffle 302, the bottom baffle 303, the side baffle 304 and a side wall of the horizontal tank body 1 together form a buffer chamber 301, and a water outlet 30421 is provided on the side baffle 304. It is understood that the two sides of the side baffles 304 are fixedly connected to a side wall of the horizontal tank body 1, the lower side of the top baffle 302 is fixedly connected to the upper end of the side baffle 304, and the upper side of the bottom baffle 303 is fixedly connected to the lower end of the side baffle 304. As a result, the top baffle 302, bottom baffle 303, side baffle 304, and a side wall of the horizontal tank body 1 can collectively enclose a buffer chamber 301. External high-pressure, high-temperature water enters the buffer chamber 301 through the high-pressure, high-temperature water inlet 103 and then enters the tank cavity 101 through the water outlet 30421 on the side baffle 304. The water level in the horizontal tank body 1 is between the upper and lower limits of the water outlet 30421, allowing the high-pressure, high-temperature water to enter the tank in an immersed manner, reducing disturbance of the liquid in the tank cavity 101, improving the gas-liquid separation effect, and improving steam quality. Furthermore, the baffle assembly 3 has a simple structure and is easy to install.

[0057] According to a further embodiment of the present invention, the side baffle 304 includes a first side baffle 3041, a second side baffle 3042, and a third side baffle 3043, which are connected in sequence. The first side baffle 3041 and the third side baffle 3043 are opposite each other, and the second side baffle 3042 is opposite a side wall of the horizontal tank body 1. The second side baffle 3042 is provided with a water outlet 30421. It is understood that multiple high-pressure, high-temperature water inlets 103 are arranged at intervals along the length of a side wall of the horizontal tank body 1. External high-pressure, high-temperature water enters the buffer chamber 301 through the high-pressure, high-temperature water inlets 103 and then enters the tank cavity 101 through the water outlet 30421 on the second side baffle 3042. This allows the external high-pressure, high-temperature water to be more evenly distributed throughout the tank cavity 101, thereby improving the efficiency of flash evaporation.

[0058] According to one embodiment of the present invention, a plurality of hot water outlets 104 are arranged on the bottom wall of the horizontal tank body 1 at intervals along the length direction, so that the water in the tank cavity 101 can be discharged through the hot water outlet 104 and returned to the process flow for recycling. It is understandable that the water in the tank cavity 101 can be transported to other devices for use after being discharged through the hot water outlet 101. For example, in the process of polysilicon reduction furnace production, the water in the tank cavity 101 can be used to cool the polysilicon reduction furnace, and the water in the tank cavity 101 can also be used to provide heat to other devices such as air conditioning and heating equipment. Multiple hot water outlets 104 can supply water to multiple devices at the same time, effectively realizing the heat recycling within the process system, thereby reducing the overall energy consumption of process production, reducing product production costs, and improving the overall benefits of products.

[0059] According to a further embodiment of the present invention, a plurality of circular suction assemblies 4 are further included. The plurality of circular suction assemblies 4 are located in the tank cavity 101 and are disposed one-to-one at one end of the plurality of hot water outlets 104. It will be appreciated that by disposing the circular suction assembly 4 at one end of each hot water outlet 104, water in the tank cavity 101 can flow out smoothly, avoiding the formation of vortices and ensuring stable operation of the pump.

[0060] According to a further embodiment of the present invention, each annular suction assembly 4 includes a top plate 401 and a plurality of ribs 402. The plurality of ribs 402 are vertically arranged, with one vertical side edge of the plurality of ribs 402 intersecting and the other vertical side edges of the plurality of ribs 402 spaced apart in the annular direction. The top ends of the plurality of ribs 402 are fixed to the top plate 401, and the bottom ends of the plurality of ribs 402 extend into one end of the hot water outlet 104. It is understood that the top plate 401 and two adjacent ribs 402 can enclose a radial inlet facing radially outward. Therefore, the top plate 401 and the plurality of ribs 402 can define a plurality of radial inlets above one end of the hot water outlet 104. Hot water in the tank cavity 101 can flow into the hot water outlet 104 through the plurality of radial inlets and then be discharged. This can prevent the hot water from forming vortices in the hot water outlet 104 and causing corrosion to the pump, while also allowing the water in the tank cavity 101 to flow out automatically more easily and return to the process for recycling. In addition, the annular suction assembly 4 has a simple structure and is easy to set up.

[0061] According to a further embodiment of the present invention, there are four ribs 402, and one vertical side end of the four ribs 402 intersects so that the four ribs 402 are distributed in a cross shape. The top ends of the four ribs 402 are fixed to the top plate 401, and the bottom ends of the four ribs 402 extend into one end of the hot water outlet 104. It can be understood that the top plate 401 and the four ribs 402 form a radial inlet facing radially outward. Therefore, four radial inlets can be defined above one end of the hot water outlet 104 by the top plate 401 and the four ribs 402. The hot water in the tank cavity 101 can flow into the hot water outlet 104 from the four radial inlets. This can prevent the hot water from forming a vortex in the hot water outlet 104 and causing corrosion to the pump. At the same time, it makes it easier for the water in the tank cavity 101 to automatically flow out and return to the process flow for recycling. In addition, the ring suction component 4 has a simple structure and is easy to set up.

[0062] According to a further embodiment of the present invention, a return pipe 5 is further included. The return pipe 5 passes through the top of the horizontal tank body 1 and extends into the tank cavity 101. The return pipe 5 has an upper inlet and a lower outlet. The upper inlet of the return pipe 5 is used to communicate with the hot water outlet 104 through an external pump; the lower outlet of the return pipe 5 is adjacent to the bottom of the horizontal tank body 1. It can be understood that the return pipe 5 can be used to facilitate debugging in the early stage of start-up. During the operation of the flash evaporation waste heat recovery device 1000, when the hot water outlet 104 returns too much water for recycling to the process flow, the excess water returns to the interior of the tank cavity 101 through the return pipe 5; the return pipe 5 adopts an immersion-type submerged water supply, that is, the lower outlet of the return pipe 5 is located below the liquid level in the tank cavity 101. In this way, secondary mixing of flash steam and liquid can be avoided, ensuring the steam dryness.

[0063] It should be noted that, depending on the specific situation, the upper inlet of the return pipe 5 can be connected to one or more hot water outlets 104.

[0064] According to one embodiment of the present invention, it also includes a low-pressure steam heating pipe assembly 6, which includes a low-pressure steam heating pipe 601 and a low-pressure steam delivery pipe 602. The low-pressure steam heating pipe 601 extends along the length direction of the horizontal tank body 1 and is arranged in the middle and lower part of the tank cavity 101. The low-pressure steam heating pipe 601 is provided with a plurality of evenly distributed steam distribution ports 6011; one end of the low-pressure steam delivery pipe 602 is located in the tank cavity 101 and is connected to the low-pressure steam heating pipe 601, and the other end of the low-pressure steam delivery pipe 602 is located outside the horizontal tank body 1. It can be understood that when the car is started for the first time, low-pressure steam is introduced into the low-pressure steam delivery pipe 602 and the low-pressure steam heating pipe 601 from the other end of the low-pressure steam delivery pipe 602, and the low-pressure steam is discharged from the low-pressure steam heating pipe 601 through multiple steam distribution ports 6011. In this way, the low-pressure steam can heat the water in the horizontal tank body 1, thereby increasing the temperature in the tank, ensuring that the system can stably recover waste heat and continuously generate low-pressure steam; multiple steam distribution ports 6011 are evenly distributed on the low-pressure steam heating pipe 601, which can evenly heat the water in the horizontal tank body 1, thereby evenly increasing the temperature in the tank, ensuring that the flash evaporation waste heat recovery device 1000 can stably recover waste heat and continuously generate low-pressure steam.

[0065] It should be noted that a plurality of columns 7 are provided in the tank cavity 101, and the plurality of columns 7 are fixed at vertical intervals at the bottom end of the horizontal tank body 1, and the low-pressure steam heating pipe 601, the low-pressure steam delivery pipe 602 and the return pipe 5 are all fixed to the columns 7 to fix the positions of the low-pressure steam heating pipe 601, the low-pressure steam delivery pipe 602 and the return pipe 5, so as to prevent the low-pressure steam heating pipe 601, the low-pressure steam delivery pipe 602 and the return pipe 5 from shaking inside the tank cavity 101 and causing disturbance to the liquid in the tank cavity 101.

[0066] According to one embodiment of the present invention, there are two steam outlet assemblies 2, which are installed at both ends of the top of the horizontal tank body 1. It can be understood that the steam outlet assembly 2 includes a straight section 201 and a contraction section 202. The lower end of the straight section 201 is fixed to the upper end of the horizontal tank body 1, and the upper end of the straight section 201 is fixed to the lower end of the contraction section 202. The diameter of the contraction section 202 gradually decreases from bottom to top. High-pressure and high-temperature water undergoes gas-liquid separation in the upper part of the tank cavity 101. The steam moves upward and is discharged from the tank cavity 101 after passing through the straight section 201 and the contraction section 202 in sequence. In this way, the steam can be conveniently discharged from the tank cavity 101, effectively reducing the entrainment of liquid by the gas and improving the steam quality.

[0067] According to one embodiment of the present invention, a wire mesh demister 8 is provided in the steam outflow channel of each steam outlet component 2. It is understandable that the wire mesh demister 8 is provided on the straight section 201 of the steam outlet component 2. When the steam passes through the straight section 201 of the steam outlet component 2, the flow rate is low, which facilitates the steam to collide with the wire mesh demister 8 for the second time to remove water droplets, thereby improving the quality of the separated steam and reducing liquid loss. After the steam passes through the contraction section 202 of the steam outlet component 2, the flow rate increases, so that the steam can quickly pass through the steam outlet component 2 and the flow rate reaches the set flow rate. In addition, by providing the wire mesh demister 8, the flash evaporation waste heat recovery device 1000 can be integrated with a horizontal flash tank and a gas-liquid separation device, thereby reducing the floor space, effectively achieving energy-saving recovery, and facilitating operation and management.

[0068] According to one embodiment of the present invention, the horizontal tank body 1 is provided with a dosing port 105 and a drain port 106 that are in communication with the tank cavity 101. It is understandable that the dosing port 105 is arranged in the middle of one side of the horizontal tank body 1. During the flash evaporation waste heat recovery process, phosphate is added to the tank cavity 101 through the dosing port 105 to prevent scaling inside the tank cavity 101 and affect the working efficiency of the flash evaporation waste heat recovery device 1000. The drain port 106 is arranged on the bottom wall of the horizontal tank body 1. Since the dirt in the tank cavity 101 will be deposited at the bottom of the horizontal tank body 1, when it is necessary to discharge the dirt at the bottom of the horizontal tank body 1, the drain port 106 is opened and the dirt can be discharged through the drain port 106. After the discharge is completed, the drain port 106 is closed, thereby ensuring that the water quality inside the tank cavity 101 meets the working requirements and ensuring the long-term, stable and safe operation of the flash evaporation waste heat recovery device 1000.

[0069] It should be noted that there are multiple sewage outlets 106, and the multiple sewage outlets 106 are arranged at intervals along the length direction on the bottom wall of the horizontal tank body 1. In this way, the sewage outlets 106 have a good sewage discharge effect and a high sewage discharge efficiency.

[0070] According to one embodiment of the present invention, it also includes a manhole 107. There are two manholes 107. The two manholes 107 are arranged at both ends of the middle part of one side of the horizontal tank body 1. A manhole cover is provided on the manhole 107 to cover the manhole 107 tightly. When the inside of the tank cavity 101 needs to be repaired or cleaned, the manhole cover is opened and the staff can enter the inside of the tank cavity 101 through the manhole 107 to perform operations. After the repair or cleaning is completed, the manhole cover is closed, thereby making it easy to clean and maintain the flash waste heat recovery device 1000.

[0071] According to one embodiment of the present invention, it also includes four liquid level gauge ports 108 and two liquid level gauges 10. The four liquid level gauge ports 108 are respectively arranged at the two ends of the upper part and the two ends of the lower part of one side of the horizontal tank body 1. The liquid level gauge 10 is arranged outside the tank body 1. The liquid level gauge port 108 at one end of the upper part of the horizontal tank body 1 and the corresponding liquid level gauge port 108 at one end of the lower part jointly fix one liquid level gauge 10. The liquid level gauge port 108 at the other end of the upper part of the horizontal tank body 1 and the corresponding liquid level gauge port 108 at the other end of the lower part jointly fix another liquid level gauge 10. The liquid level gauge 10 is used to detect the liquid level inside the tank cavity 101 to ensure that the liquid level in the tank cavity 101 is always within a preset liquid level range.

[0072] According to one embodiment of the present invention, a saddle 9 is further included, and the saddle 9 includes a fixed saddle 901 and a sliding saddle 902. The fixed saddle 901 and the sliding saddle 902 are respectively installed at the two ends of the bottom of the horizontal tank body 1. The end of the horizontal tank body 1 equipped with the fixed saddle 901 is fixed, and the end equipped with the sliding saddle 902 can be moved, so the position adjustment is convenient.

[0073] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0074] While the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions, and alterations may be made to the embodiments without departing from the principles and spirit of the invention.

Claims

1. A flash evaporation waste heat recovery device, characterized in that: include: A horizontal tank body defines a tank cavity, and is provided with a water inlet communicating with the tank cavity. The water inlet is used for adding water during pre-operation commissioning and replenishing water during operation to compensate for a decrease in the amount of water in the tank cavity due to flash steam. A plurality of high-pressure and high-temperature water inlets communicating with the tank cavity are arranged at intervals along the length of a side wall of the horizontal tank body in the middle thereof. a steam outlet assembly, wherein the steam outlet assembly is formed with a steam outflow channel, and the steam outlet assembly is installed on the top of the horizontal tank body so that the steam outflow channel is communicated with the tank cavity; 18. The water supply device of claim 17, wherein the water supply device is configured to provide a channel for receiving the at least one high-pressure high-temperature water pump, wherein the channel is connected to the outlet of the water supply device to form a channel for receiving the at least one high-pressure high-temperature water pump. Multiple ring-suction assemblies are located in the tank cavity and are arranged one-to-one at one end of the multiple hot water outlets. Each of the ring-suction assemblies includes a top plate and multiple ribs. The multiple ribs are arranged vertically, and one vertical side end edge of the multiple ribs intersects and the other vertical side ends of the multiple ribs are spaced apart in the circumferential direction. The top ends of the multiple ribs are fixed to the top plate, and the bottom ends of the multiple ribs extend into one end of the hot water outlet.

2. The flash evaporation waste heat recovery device according to claim 1, characterized in that: The side baffle includes a first side baffle, a second side baffle and a third side baffle connected in sequence, wherein the first side baffle is opposite to the third side baffle, the second side baffle is opposite to a side wall of the horizontal tank body, and the water outlet is provided on the second side baffle.

3. The flash evaporation waste heat recovery device according to claim 1, characterized in that: There are four ribs, and one vertical side end of the four ribs intersects so that the four ribs are distributed in a cross shape. The top ends of the four ribs are fixed to the top plate, and the bottom ends of the four ribs extend into one end of the hot water outlet.

4. The flash evaporation waste heat recovery device according to claim 1, characterized in that: It also includes a return pipe, which passes through the top of the horizontal tank body and extends into the tank cavity. The return pipe has an upper inlet and a lower outlet. The upper inlet of the return pipe is used to communicate with the hot water outlet through an external pump; the lower outlet of the return pipe is adjacent to the bottom of the horizontal tank body.

5. The flash evaporation waste heat recovery device according to claim 1, characterized in that: It also includes a low-pressure steam heating pipe assembly, which includes a low-pressure steam heating pipe and a low-pressure steam delivery pipe. The low-pressure steam heating pipe extends along the length direction of the horizontal tank body and is arranged in the middle and lower part of the tank cavity. The low-pressure steam heating pipe is provided with a plurality of evenly distributed steam distribution ports; one end of the low-pressure steam delivery pipe is located in the tank cavity and is connected to the low-pressure steam heating pipe, and the other end of the low-pressure steam delivery pipe is located outside the horizontal tank body.

6. The flash evaporation waste heat recovery device according to claim 1, characterized in that: There are two steam outlet assemblies, which are mounted at both ends of the top of the horizontal tank body.

7. The flash evaporation waste heat recovery device according to claim 1, characterized in that: A wire mesh demister is provided in the steam outflow channel of each steam outlet assembly.

8. The flash evaporation waste heat recovery device according to claim 1, characterized in that: The horizontal tank body is provided with a drug adding port and a sewage discharge port which are communicated with the tank cavity.

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