An evaporation treatment device suitable for ammonium chloride high-salinity wastewater

Abstract

The present application relates to water pollution control and treatment technical field, specifically to a kind of evaporation treatment equipment suitable for ammonium chloride high-salt wastewater, including evaporator, and evaporator includes shell and multiple heat exchange parts in shell.The heat exchange part includes partition and multiple heat exchange pipes, and the heat exchange pipe includes upper pipe, middle pipe and lower pipe which are sequentially arranged in vertical direction, and the upper pipe is installed on the partition, and the middle pipe is respectively connected with the upper pipe and the lower pipe ball hinge.A kind of evaporation treatment equipment suitable for ammonium chloride high-salt wastewater of the present application utilizes the length change of middle pipe of heat exchange pipe in vertical direction after rotation, dynamically compensates the problem of empty pipe caused by liquid level drop, prolongs the effective heat exchange time of upper pipe, shortens the empty pipe dry burning time, avoids the occurrence of large-area empty pipe dry burning situation, reduces the damage of high-temperature steam to heat exchange pipe, prolongs the service life of heat exchange pipe, enhances the stability of ammonium chloride high-salt wastewater evaporation treatment equipment, and helps the progress of water pollution control and treatment work.

Description

Technical Field

[0001] This invention relates to the field of water pollution control and treatment technology, specifically to an evaporation treatment device suitable for high-salt ammonium chloride wastewater. Background Technology

[0002] In water pollution control and treatment, the compliant treatment of industrial wastewater is one of the main research directions. High-salt ammonium chloride wastewater, a common type of high-salt, high-ammonia-nitrogen wastewater in industrial production, widely originates from industries such as fertilizer production, chemical synthesis, electroplating, and photovoltaic cleaning. The effectiveness of its discharge control and treatment directly affects the overall success of water pollution control and treatment. The challenges in treating this type of wastewater lie in crystallization and scaling, secondary pollution, and inhibition of microbial activity. Direct discharge can lead to soil salinization and eutrophication of water bodies. Therefore, targeted processes are needed to achieve compliant treatment and resource recovery, contributing to the achievement of water pollution control and treatment goals.

[0003] Triple-effect evaporators have become the mainstream equipment for treating high-salinity wastewater due to their core advantages of high efficiency and energy saving. A triple-effect evaporator consists of three evaporators connected in series, each called an effect. The secondary steam generated in the previous effect serves as the heat source for the next effect, thus achieving multi-stage energy utilization and significantly reducing energy consumption. This aligns with the development concepts of energy conservation, emission reduction, and green governance in water pollution control and treatment. The working principle of a triple-effect evaporator is based on the physical processes of evaporation and condensation. First, the raw material liquid enters the first-effect evaporator, where some water evaporates under the action of heating steam, forming secondary steam. This secondary steam then enters the second-effect evaporator, serving as a heat source to heat the solution in the second-effect evaporator, also generating secondary steam. The third-effect evaporator repeats this process, ultimately concentrating the solution to the desired concentration. As the operating pressure of each effect gradually decreases, the boiling point of the solution also decreases, allowing for efficient utilization of thermal energy and significantly reducing energy consumption per unit treatment volume, meeting the requirements for treating high-salinity wastewater in water pollution control and treatment.

[0004] For example, Chinese patent CN216638958U discloses a corrosion-resistant triple-effect evaporator for saline wastewater, comprising: a first-effect evaporator unit, a second-effect evaporator unit, a third-effect evaporator unit, and a condensation unit. The first-effect, second-effect, and third-effect evaporator units have identical structures. The first-effect evaporator unit includes a heater, a separator, a first pipe, and a second pipe; the first pipe is connected to the bottom inlet of the heater and the bottom outlet of the separator, respectively; the second pipe is connected to the upper outlet of the heater and the upper inlet of the separator, respectively. The second-effect evaporator unit is connected in series with the first-effect evaporator unit, and the third-effect evaporator unit is connected in series with the second-effect evaporator unit. The steam outlet of the separator in the third-effect evaporator unit is connected to the inlet of the condensation unit via a series pipe; a pressure-reducing device and a pressure detection device are installed on the second pipe of the third-effect evaporator unit, improving the water evaporation effect of the high-salt wastewater. However, when the evaporator is working, the evaporation of water in the wastewater will cause changes in the overall liquid level in the evaporator. Especially for wastewater with a high water content, the liquid level drops significantly during the entire evaporation process, causing the top of the tube side in the evaporator to be in an empty tube dry-burning state. Prolonged empty tube dry-burning can easily cause the tube side material to age faster due to high temperature, shortening the service life of the tube side. This cannot meet the requirements for efficient, stable and environmentally friendly treatment of high-salt ammonium chloride wastewater, and is not conducive to water pollution control and treatment. Summary of the Invention

[0005] This invention provides an evaporation treatment device suitable for high-salt ammonium chloride wastewater, which solves the problem that when existing evaporators are in operation, the evaporation of water in the wastewater causes changes in the overall liquid level in the evaporator, resulting in the top of the tubes in the evaporator being in an empty tube dry-burning state. Prolonged empty tube dry-burning can easily lead to accelerated aging of the tube material due to high temperature, shortening the service life of the tubes.

[0006] The present invention provides an evaporation treatment device suitable for high-salinity ammonium chloride wastewater, employing the following technical solution: An evaporation treatment device suitable for high-salinity ammonium chloride wastewater includes a single-effect treatment unit, which includes an evaporator. The evaporator includes a shell and multiple heat exchange sections. The shell is arranged vertically, and the multiple heat exchange sections are arranged side-by-side within the shell along a first direction, which is horizontal. Each heat exchange section includes a partition and multiple heat exchange tubes. The partition is slidably installed within the shell along a second direction, which is horizontal and perpendicular to the first direction. The partition of the multiple heat exchange sections divides the shell into an independent upper chamber and a lower chamber. An opening is formed in the lower chamber. It has an air inlet and an air outlet, with the air inlet located above the air outlet. An air outlet is provided on the upper chamber. Multiple heat exchange tubes are arranged side by side in the lower chamber along a second direction. The heat exchange tubes include an upper tube, a middle tube, and a lower tube arranged sequentially in the vertical direction, with the upper tube located above the lower tube. The upper tube can be slidably installed on a partition plate, with its upper end extending into the upper chamber. The lower tube is fixedly installed in the lower chamber. The middle tube is ball-hinged with the upper and lower tubes respectively. In the initial state, the middle tube is inclined relative to the vertical direction and can rotate relative to the upper and lower tubes, allowing the middle tube to rotate from the inclined position to the vertical position. A feed inlet is provided at the lower end of the lower chamber, and the feed inlet is connected to multiple lower tubes respectively.

[0007] Furthermore, a fixing plate is fixedly installed inside the lower chamber. Multiple connecting ports are opened on the fixing plate, and each connecting port is set in correspondence with the lower pipe. The lower pipe is fixedly installed on the fixing plate and is connected to the feed port through the connecting ports.

[0008] Furthermore, the multiple heat exchange sections are divided into multiple first sections and multiple second sections arranged sequentially in the second direction, and the first sections and second sections are alternately distributed in the second direction. The inclination direction of the middle tube of the heat exchange tube in the first section is opposite to the inclination direction of the middle tube of the heat exchange tube in the second section. A first driving member and a second driving member are provided on the lower chamber. The first driving member is used to rotate the middle tube of the heat exchange tube in the first section from the inclined position to the vertical position, and the second driving member is used to rotate the middle tube of the heat exchange tube in the second section from the inclined position to the vertical position.

[0009] Furthermore, the first driving component includes a first hydraulic cylinder and multiple first driving plates. The first hydraulic cylinder is mounted on the lower chamber. The output end of the first hydraulic cylinder is arranged along the second direction and a first main plate is mounted on it. A first driven plate is slidably mounted on the first main plate. Multiple first driving plates are arranged side by side on the first driven plate along the first direction and are fixedly connected to the first driven plate. Each first driving plate corresponds to a first part. The middle tube of the heat exchange tube in each first part is ball-jointed with the first driving plate. The second driving component includes a second hydraulic cylinder and multiple second driving plates. The second hydraulic cylinder is mounted on the lower chamber. The output end of the second hydraulic cylinder is arranged along the second direction and a second main plate is mounted on it. A second driven plate is slidably mounted on the second main plate. Multiple second driving plates are arranged side by side on the second driven plate along the first direction and are fixedly connected to the second driven plate. Each second driving plate corresponds to a second part. The middle tube of the heat exchange tube in each second part is ball-jointed with the second driving plate.

[0010] Furthermore, an isolation plate is provided between every two adjacent first parts and second parts arranged in the first direction; the isolation plate is arranged vertically and its upper end abuts against the partition, and its lower end is fixedly connected to the lower chamber; in the first part, multiple upper pipes are connected to each other through a first baffle plate, and multiple lower pipes are connected to each other through a second baffle plate; in the second part, multiple upper pipes are connected to each other through a third baffle plate, and multiple lower pipes are connected to each other through a fourth baffle plate; two air inlets are provided, and the two air inlets are located at the two ends of the lower chamber in the second direction.

[0011] Furthermore, the two sidewalls of the lower chamber in the second direction are referred to as the first sidewall and the second sidewall, respectively; the two ends of the partition plate in the second direction are spaced apart from the first sidewall and the second sidewall; in the initial state, the first baffle and the second baffle are both in contact with the first sidewall, the third baffle and the fourth baffle are both in contact with the second sidewall, the first drive plate is set on the side closer to the second sidewall in the second direction, and the second drive plate is set on the side closer to the first sidewall in the second direction.

[0012] Furthermore, the first and third baffles are equidistant from the bottom wall of the lower chamber in the vertical direction, and the second and fourth baffles are equidistant from the bottom wall of the lower chamber in the vertical direction. In the vertical direction, the air inlet is located between the baffle and the first baffle.

[0013] Furthermore, each of the two air inlets is equipped with an air intake pipe, both of which are located outside the housing and are interconnected, and a main air pipe is provided at the connection point of the two air intake pipes.

[0014] Furthermore, the multiple baffles are divided into multiple first plates and multiple second plates arranged sequentially in the second direction, and the first plates and second plates are alternately distributed in the second direction. The first plates and the first parts are arranged in a one-to-one correspondence, and the second plates and the second parts are arranged in a one-to-one correspondence. The first baffle and the second baffle abut against the first plates they are arranged with. The third baffle and the fourth baffle abut against the second plates they are arranged with. The first plates and the second plates are hollow inside, and the first plates have two first openings. The first baffle and the second baffle are respectively connected to the first openings. The second plates have two second openings. The third baffle and the fourth baffle are respectively connected to the second openings.

[0015] Furthermore, the lower ends of multiple first plates and multiple second plates are interconnected by connecting plates. The multiple connecting plates are all inclined. The two ends of the connecting plates in the vertical direction are respectively called the first end and the last end. The first end is located above the last end, and a collecting pipe is provided on one side of the last end, with the collecting pipe extending out of the shell.

[0016] The beneficial effects of this invention are as follows: An evaporation treatment device for high-salt ammonium chloride wastewater, through the setting of a single-effect treatment unit, drives the middle tube of the heat exchange tube to rotate relative to the connected upper and lower tubes during the water evaporation process. This causes the middle tube to gradually rotate from an inclined state to a vertical state. During the rotation, the vertical length of the middle tube increases, causing the upper tube to slide upward along the partition and further extend into the upper chamber. The empty tube area is carried into the upper chamber as the upper tube moves upward, no longer exchanging heat with the steam. Furthermore, during the rotation of the middle tube, the rotated middle tube will rise relatively, causing the upper tube to rise further, extending upward relative to the partition, ultimately raising the entire heat exchange tube. This allows the empty tube portion, free of wastewater, to extend into the upper chamber. By utilizing the change in the vertical length of the rotating middle tube, the problem of empty tubes caused by a drop in liquid level is dynamically compensated, extending the effective heat exchange time of the upper tube, shortening the dry-burning time of the empty tubes, avoiding large-area dry-burning of the empty tubes, reducing damage to the heat exchange tubes from high-temperature steam, and extending the service life of the heat exchange tubes. Furthermore, during the heat exchange process after the steam enters the lower chamber, the steam will condense on the outer peripheral walls of the upper, middle, and lower pipes, causing the upper, middle, and lower pipes to be misaligned in the initial state. This allows the condensate to fall directly under the action of gravity, reducing the adhesion time of the condensate, improving the heat exchange efficiency, enhancing the stability of the evaporation treatment equipment for high-salt ammonium chloride wastewater, and contributing to water pollution control and treatment. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention; Figure 2 This is a schematic diagram of a single-effect treatment unit of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention; Figure 3 This is a schematic diagram of an evaporator according to an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater of the present invention; Figure 4 This is a structural exploded view of the evaporator in an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention; Figure 5 This is an exploded view of the internal structure of the evaporator in an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention; Figure 6 This is a partially exploded view of the heat exchange section of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention. Figure 7 This is a schematic diagram of the first and second parts of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention; Figure 8 This is a cross-sectional view of a portion of the heat exchange section of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention. Figure 9 for Figure 8 Enlarged view of point A in the middle; Figure 10 This is a schematic diagram of the connection between the air inlet and the main air pipe in an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention; Figure 11 This is a schematic diagram of the first part of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention in its initial state; Figure 12 This is a schematic diagram of the second part of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater according to the present invention, in its initial state. Figure 13 This is a schematic diagram of the central tube of the first part of an embodiment of an evaporation treatment device for high-salt ammonium chloride wastewater of the present invention after it has been rotated to a vertical position.

[0019] In the diagram: 100, Single-effect processing unit; 110, Evaporator; 120, Shell; 121, Upper chamber; 122, Lower chamber; 123, Air inlet; 124, Exhaust outlet; 125, Air outlet; 126, Feed inlet; 127, Fixed plate; 128, Main air pipe; 130, Heat exchange section; 131, Baffle plate; 140, Heat exchange tube; 141, Upper tube; 142, Middle tube; 143, Lower tube; 144, First baffle; 145, Second baffle; 146, Third baffle; 147, Fourth baffle. Plate; 150, First driving component; 151, First hydraulic cylinder; 152, First driving plate; 153, First main plate; 154, First driven plate; 160, Second driving component; 170, Isolation plate; 171, First plate; 172, Second plate; 173, First opening; 174, Second opening; 175, Connecting plate; 176, Manifold; 180, Separator; 190, First pipeline; 200, Second-effect treatment unit; 210, Connecting pipeline; 300, Third-effect treatment unit; 400, Condenser. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] An embodiment of the evaporation treatment equipment for high-salinity ammonium chloride wastewater according to the present invention is as follows: Figures 1 to 13 As shown.

[0022] An evaporation treatment device suitable for high-salinity ammonium chloride wastewater includes a single-effect treatment unit 100, which includes an evaporator 110. The evaporator 110 includes a shell 120 and multiple heat exchange sections 130. The shell 120 is arranged vertically, and the multiple heat exchange sections 130 are arranged side by side within the shell 120 along a first direction, which is horizontal. Each heat exchange section 130 includes a partition 131 and multiple heat exchange tubes 140. The partition 131 is slidably installed within the shell 120 along a second direction, which is horizontal and perpendicular to the first direction. The partition 131 of the multiple heat exchange sections 130 divides the shell 120 into an independent upper chamber 121 and a lower chamber 122. The lower chamber 122 has an air inlet 123 and an exhaust outlet 124, with the air inlet 123 located above the exhaust outlet 124. The upper chamber 121 has an air outlet 125.

[0023] Multiple heat exchange tubes 140 are arranged side-by-side in the lower chamber 122 along a second direction. Each heat exchange tube 140 includes an upper tube 141, a middle tube 142, and a lower tube 143 arranged sequentially in the vertical direction, with the upper tube 141 positioned above the lower tube 143. The upper tube 141 is slidably mounted on a partition 131, with its upper end extending into the upper chamber 121. The lower tube 143 is fixedly mounted within the lower chamber 122. The middle tube 142 is ball-jointed to both the upper tube 141 and the lower tube 143. Initially, the middle tube 142 is inclined relative to the vertical direction and can rotate relative to both the upper and lower tubes, moving from an inclined position to a vertical position. A feed inlet 126 is provided at the lower end of the lower chamber 122, communicating with multiple lower tubes 143.

[0024] Specifically, a fixing plate 127 is fixedly installed inside the lower chamber 122. Multiple connecting ports are provided on the fixing plate 127, each corresponding to a lower pipe 143. The lower pipe 143 is fixedly installed on the fixing plate 127 and connects to the feed inlet 126 through the connecting ports. The housing 120 includes an upper cover and a main body. The feed inlet 126 is located at the lower end of the main body, and the air inlet 123 is located on the side of the main body. The upper cover is fixedly installed on the upper end of the main body.

[0025] In this embodiment, a single-effect treatment unit 100 is set up. During use, wastewater is introduced into the lower chamber 122 through the inlet 126. The wastewater then enters the lower tubes 143 of multiple heat exchange tubes 140 and flows upward from the lower tubes 143 into the middle tubes 142 and the upper tubes 141. Steam is then introduced into the lower chamber 122 through the air inlet 123. The steam flows downward in the lower chamber 122 and exchanges heat with the wastewater in the heat exchange tubes 140. After absorbing heat, the wastewater evaporates, and the generated secondary steam enters the upper chamber 121 from the upper end of each upper tube 141. Finally, it is discharged from the air outlet 125 of the upper chamber 121, while the heat-exchanged steam is discharged from the exhaust port 124 and enters the subsequent treatment stage.

[0026] As water continues to evaporate, the wastewater level in the upper tube 141 gradually decreases. If left unattended, this will result in an empty tube area at the top of the upper tube 141. Therefore, during the water evaporation process, the middle tube 142 of the heat exchange tube 140 is rotated relative to the upper tube 141 and lower tube 143 connected to it. This causes the middle tube 142 of the heat exchange tube 140 to gradually rotate from an inclined state to a vertical state. During the rotation, the length of the middle tube 142 in the vertical direction increases, causing the upper tube 141 to slide upward along the partition 131 and further extend into the upper chamber 121. The empty tube area is carried into the upper chamber 121 as the upper tube 141 moves upward and no longer exchanges heat with the steam. Furthermore, during the rotation of the middle tube 142, the rotated middle tube 142 will rise relatively, driving the upper tube 141 to rise further, causing the upper tube 141 to extend further upward relative to the partition 131, ultimately raising the entire heat exchange tube 140 as a whole, extending the empty tube portion without wastewater into the upper chamber 121. By utilizing the change in the vertical length of the middle tube 142 after rotation, the problem of empty tube caused by the drop in liquid level is dynamically compensated, extending the effective heat exchange time of the upper tube 141, shortening the dry burning time of the empty tube, avoiding the occurrence of large-area dry burning of the empty tube, reducing the damage of high-temperature steam to the heat exchange tube 140, and extending the service life of the heat exchange tube 140. Furthermore, during the heat exchange process after the steam enters the lower chamber 122, the steam will condense on the outer peripheral walls of the upper tube 141, middle tube 142, and lower tube 143, causing the upper tube 141, middle tube 142, and lower tube 143 to be misaligned in the initial state. This allows the condensate to fall directly under the action of gravity, reducing the adhesion time of the condensate, improving the heat exchange efficiency, enhancing the stability of the evaporation treatment equipment for high-salt ammonium chloride wastewater, and assisting in the work of water pollution control and treatment.

[0027] In a further embodiment, the plurality of heat exchange sections 130 are evenly divided into a plurality of first sections and a plurality of second sections arranged sequentially in a second direction, and the first sections and second sections are alternately distributed in the second direction. The inclination direction of the middle tube 142 of the heat exchange tube 140 in the first section is opposite to the inclination direction of the middle tube 142 of the heat exchange tube 140 in the second section. A first driving member 150 and a second driving member 160 are provided on the lower chamber 122. The first driving member 150 is used to rotate the middle tube 142 of the heat exchange tube 140 in the first section from an inclined position to a vertical position, and the second driving member 160 is used to rotate the middle tube 142 of the heat exchange tube 140 in the second section from an inclined position to a vertical position.

[0028] The first driving component 150 includes a first hydraulic cylinder 151 and multiple first driving plates 152. The first hydraulic cylinder 151 is fixedly installed on the lower chamber 122. The output end of the first hydraulic cylinder 151 is arranged along the second direction and a first main plate 153 is arranged on it. A first driven plate 154 is slidably arranged on the first main plate 153. Multiple first driving plates 152 are arranged side by side on the first driven plate 154 along the first direction and are fixedly connected to the first driven plate 154. The first driving plates 152 are arranged one-to-one with the first part. The middle tube 142 of the heat exchange tube 140 on each first part is ball-jointed with the first driving plate 152.

[0029] Specifically, the second driving component 160 includes a second hydraulic cylinder and multiple second driving plates. The second hydraulic cylinder is fixedly mounted on the lower chamber 122. The output end of the second hydraulic cylinder is arranged along a second direction and a second main plate is disposed thereon. A second driven plate is slidably disposed on the second main plate. Multiple second driving plates are arranged side by side on the second driven plates along a first direction and are fixedly connected to the second driven plates. Each second driving plate corresponds to a second part, and the middle tube 142 of the heat exchange tube 140 on each second part is ball-jointed with the second driving plate.

[0030] This embodiment uses a first driving component 150 and a second driving component 160. Taking the first driving component 150 as an example, in use, activating the first hydraulic cylinder 151 causes the first main plate 153 to move in a second direction. The movement of the first main plate 153, through the first driven plate 154, causes multiple first driving plates 152 to move in the second direction. The movement of the first driving plates 152 in the second direction pulls the middle tube 142 to rotate relative to the upper tube 141 and the lower tube 143, causing the middle tube 142 of the heat exchange tube 140 to rotate from an inclined position to a vertical position. The working principle of the second driving component 160 is the same as that of the first driving component 150, and will not be described again.

[0031] In a further embodiment, a partition plate 170 is provided between every two adjacent first parts and second parts arranged in the first direction. The partition plate 170 is arranged vertically and its upper end abuts against the partition plate 131, and its lower end is fixedly connected to the lower chamber 122. The two sidewalls of the lower chamber 122 in the second direction are referred to as the first sidewall and the second sidewall, respectively. A gap is left between the two ends of the partition plate 170 in the second direction and the first sidewall and the second sidewall. In the first part, multiple upper pipes 141 are connected by a first baffle plate 144, and multiple lower pipes 143 are connected by a second baffle plate 145. In the initial state, both the first baffle plate 144 and the second baffle plate 145 abut against the first sidewall, and the first drive plate 152 is arranged on the side closer to the second sidewall in the second direction. Thus, the partition plate 131, the first baffle plate 144, the first drive plate 152 and the second baffle plate 145 define a first flow channel in the lower chamber 122. In the second part, multiple upper pipes 141 are connected by a third baffle 146, and multiple lower pipes 143 are connected by a fourth baffle 147. Initially, both the third baffle 146 and the fourth baffle 147 abut against the second sidewall. The second drive plate is positioned closer to the first sidewall in the second direction. Thus, the partition 131, the third baffle 146, the second drive plate, and the fourth baffle 147 define a second flow channel within the lower chamber 122. Furthermore, the first baffle 144 and the third baffle 146 are equidistant from the bottom wall of the lower chamber 122 in the vertical direction, and the second baffle 145 and the fourth baffle 147 are equidistant from the bottom wall of the lower chamber 122 in the vertical direction. There are two air inlets 123, which are located at the two ends of the lower chamber 122 in the second direction, and in the vertical direction, the air inlets 123 are located between the partition 131 and the first baffle 144.

[0032] Specifically, each of the two air inlets 123 is equipped with an air inlet pipe. Both air inlet pipes are located outside the housing 120 and are interconnected. A main air pipe 128 is provided at the connection point of the two air inlet pipes. In use, steam is introduced into the air inlet pipes through the main air pipe 128. The steam will flow along the two air inlet pipes and enter the lower chamber 122 from the two air inlets 123 respectively.

[0033] In this embodiment, an isolation plate 170 is used to separate the first part and the second part in a first direction. A first baffle 144 is provided on the upper pipe 141 of the first part, and a second baffle 145 is provided on the lower pipe 143. This allows steam to enter the lower chamber 122 from the inlet 123, as described above. Figure 11 As shown, steam introduced from one side of the first sidewall will sequentially pass through the first baffle 144, the first drive plate 152, and the second baffle 145, exhibiting a positive S-shaped flow, thus prolonging the heat exchange time of the steam in the lower chamber 122. Similarly, see... Figure 12As shown, the steam introduced from one side of the second sidewall will pass through the third baffle 146, the second drive plate and the fourth baffle 147 in sequence, and flow in an anti-S-shaped manner, which prolongs the heat exchange time of the steam in the lower chamber 122.

[0034] Furthermore, when steam entering from one side of the first sidewall passes through the first baffle 144, the first drive plate 152, and the second baffle 145, it will more easily converge at the contact points between the first baffle 144 and the first sidewall, the connection points between the first drive plate 152 and the second sidewall, and the contact points between the second baffle 145 and the first sidewall, creating "dead zones" at these locations. However, since the isolation plate 170 has gaps between its two ends in the second direction and both the first and second sidewalls, and the third baffle 146 and the fourth baffle 147 are both in contact with the second sidewall, and the second drive plate is positioned closer to the first sidewall in the second direction, the steam can move along the lateral connection points in the first direction after converging in these "dead zones," and the steam flow will not be obstructed. Similarly, the second sidewall... When steam entering from one side of the wall passes through the third baffle 146, the second drive plate, and the fourth baffle 147, it will more easily converge at the contact point between the third baffle 146 and the second sidewall, the connection point between the second drive plate and the first sidewall, and the contact point between the fourth baffle 147 and the second sidewall, creating "dead zones" at these locations. However, since the isolation plate 170 has gaps between its two ends in the second direction and both the first and second sidewalls, and both the first baffle 144 and the second baffle 145 are in contact with the first sidewall, and the first drive plate 152 is positioned closer to the second sidewall in the second direction, after the steam converges in these "dead zones," it can move along the lateral connection point in the first direction without obstructing the flow of steam, allowing the heat of the steam to be fully utilized. Furthermore, after the middle tube 142 rotates from inclined to vertical, the distance between the first baffle 144 and the third baffle 146 and the partition 131 will be shortened. After the steam flows to this point, the flow resistance will increase relatively, increasing the time for heat exchange between the steam and the upper tube 141 and improving the heat exchange effect.

[0035] In a further embodiment, the plurality of partition plates 170 are evenly divided into a plurality of first plates 171 and a plurality of second plates 172 arranged sequentially in a second direction, and the first plates 171 and the second plates 172 are alternately distributed in the second direction. The first plates 171 and the first part are arranged in a one-to-one correspondence, and the second plates 172 and the second part are arranged in a one-to-one correspondence. The first baffle 144 and the second baffle 145 abut against their corresponding first plates 171. The third baffle 146 and the fourth baffle 147 abut against their corresponding second plates 172. The first plates 171 and the second plates 172 are both hollow inside, and the first plate 171 has two first openings 173. The first baffle 144 and the second baffle 145 are respectively connected to the first openings 173. The second plate 172 has two second openings 174. The third baffle 146 and the fourth baffle 147 are respectively connected to the second openings 174.

[0036] The first baffle 144, the second baffle 145, the third baffle 146, and the fourth baffle 147 are all inclined. The two ends of each baffle 144, baffle 145, baffle 146, and baffle 147 in the vertical direction are referred to as the upper end and the lower end, respectively, with the upper end located above the lower end. The lower end of the first baffle 144 and the lower end of the second baffle 145 are connected to their corresponding first openings 173, and the lower ends of the third baffle 146 and the fourth baffle 147 are connected to their corresponding second openings 174.

[0037] The lower ends of multiple first plates 171 and multiple second plates 172 are interconnected by connecting plates 175. The multiple connecting plates 175 are all inclined. The two ends of the connecting plates 175 in the vertical direction are respectively called the head end and the tail end. The head end is located above the tail end, and a collecting pipe 176 is provided on one side of the tail end. The collecting pipe 176 extends out of the housing 120.

[0038] In this embodiment, multiple baffles 170 are divided into a first plate 171 and a second plate 172. During use, after steam condenses in the lower chamber 122, it can flow along the first baffle 144 and the second baffle 145 to the first opening 173, and then flow downward in the first plate 171 to the connecting plate 175; it can also flow along the third baffle 146 and the fourth baffle 147 to the second opening 174, and then flow downward in the second plate 172 to the connecting plate 175, and finally flow from the connecting plate 175 to the collecting pipe 176 for recycling and reuse. This avoids condensate remaining in the lower chamber 122, which would affect the normal heat exchange of steam and improves evaporation efficiency.

[0039] In a further embodiment, similar to the prior art, the first-effect treatment unit 100 also includes a separator 180, which is arranged vertically. The separator 180 has a steam outlet and a discharge port at its upper and lower ends, respectively. The discharge port at the lower end of the separator 180 is connected to the inlet 126 at the lower end of the evaporator 110 via a first pipe 190, allowing the wastewater in the separator 180 to flow back to the evaporator 110 for circulating heating and evaporation via the first pipe 190. An evaporation treatment device suitable for high-salt ammonium chloride wastewater also includes a second-effect treatment unit 200, a third-effect treatment unit 300, and a condenser 400. The connection structure and principle of the second-effect treatment unit 200 and the third-effect treatment unit 300 are the same as those of the first-effect treatment unit 100.

[0040] Specifically, the steam outlet of the separator 180 of the first-effect treatment unit 100 is connected to the air inlet 123 of the evaporator 110 of the second-effect treatment unit 200 via the connecting pipe 210, so that the steam generated by the separator 180 of the first-effect treatment unit 100 can enter the evaporator 110 of the second-effect treatment unit 200 and exchange heat in the evaporator 110, thereby realizing the full utilization of thermal energy.

[0041] Similarly, the steam outlet of the separator 180 of the double-effect treatment unit 200 is connected to the air inlet 123 of the evaporator 110 of the triple-effect treatment unit via the connecting pipe 210, so that the steam generated by the separator 180 of the double-effect treatment unit 200 can enter the evaporator 110 of the triple-effect treatment unit 300 and exchange heat in the evaporator 110. The steam outlet of the separator 180 of the triple-effect treatment unit 300 is connected to the condenser 400. The steam of the triple-effect treatment unit 300 is condensed by the condenser 400 to obtain condensate water, which can be recycled.

[0042] Based on the above embodiments, the specific working process is as follows: In operation, wastewater is introduced into the lower chamber 122 through the inlet 126. The wastewater then enters the lower tubes 143 of multiple heat exchange tubes 140 and flows upwards from the lower tubes 143 into the middle tubes 142 and the upper tubes 141. Steam is then introduced into the lower chamber 122 through the inlet 123. The steam flows downwards within the lower chamber 122 and exchanges heat with the wastewater in the heat exchange tubes 140. After absorbing heat, the wastewater evaporates, and the resulting secondary steam enters the upper chamber 121 from the upper end of each upper tube 141. Finally, it is discharged from the outlet 125 of the upper chamber 121, while the heat-exchanged steam is discharged from the exhaust port 124 and enters the subsequent treatment stage.

[0043] As water continues to evaporate, the wastewater level in the upper tube 141 gradually decreases. If left unattended, this will result in an empty tube area at the top of the upper tube 141. Therefore, during the water evaporation process, the first drive unit 150 and the second drive unit 160 are activated. Taking the first drive unit 150 as an example, the activation of the first hydraulic cylinder 151 will drive the first main plate 153 to move in the second direction. The movement of the first main plate 153 will drive multiple first drive plates 152 to move in the second direction via the first driven plate 154. The movement of the first drive plates 152 in the second direction will pull the middle tube 142 to rotate relative to the upper tube 141 and the lower tube 143, causing the middle tube 142 of the heat exchange tube 140 to rotate from an inclined position to a vertical position. During the rotation, the length of the middle tube 142 in the vertical direction increases, causing the upper tube 141 to slide upward along the partition 131 and further extend into the upper chamber 121. The empty tube area is carried into the upper chamber 121 as the upper tube 141 moves upward, no longer exchanging heat with the steam. Furthermore, during the rotation of the middle tube 142, the rotated middle tube 142 will rise relatively, driving the upper tube 141 to rise further, causing the upper tube 141 to extend further upward relative to the partition 131, ultimately raising the entire heat exchange tube 140 as a whole, extending the empty tube portion without wastewater into the upper chamber 121. By utilizing the change in the vertical length of the middle tube 142 after rotation, the problem of empty tube caused by the drop in liquid level is dynamically compensated, extending the effective heat exchange time of the upper tube 141, shortening the dry burning time of the empty tube, avoiding the occurrence of large-area dry burning of the empty tube, reducing the damage of high-temperature steam to the heat exchange tube 140, and extending the service life of the heat exchange tube 140. Furthermore, during the heat exchange process after the steam enters the lower chamber 122, the steam will condense on the outer peripheral walls of the upper tube 141, middle tube 142 and lower tube 143, causing the upper tube 141, middle tube 142 and lower tube 143 to be misaligned in the initial state. This allows the condensate to fall directly under the action of gravity, reducing the adhesion time of the condensate and improving the heat exchange efficiency.

[0044] And after the steam enters the lower chamber 122 from the air inlet 123, see Figure 11 As shown, steam introduced from one side of the first sidewall will sequentially pass through the first baffle 144, the first drive plate 152, and the second baffle 145, exhibiting a positive S-shaped flow, thus prolonging the heat exchange time of the steam in the lower chamber 122. Similarly, see... Figure 12 As shown, the steam introduced from one side of the second sidewall will pass through the third baffle 146, the second drive plate and the fourth baffle 147 in sequence, and flow in an anti-S-shaped manner, which prolongs the heat exchange time of the steam in the lower chamber 122.

[0045] Furthermore, when steam entering from one side of the first sidewall passes through the first baffle 144, the first drive plate 152, and the second baffle 145, it will more easily converge at the contact points between the first baffle 144 and the first sidewall, the connection points between the first drive plate 152 and the second sidewall, and the contact points between the second baffle 145 and the first sidewall, creating "dead zones" at these locations. However, since the isolation plate 170 has gaps between its two ends in the second direction and both the first and second sidewalls, and the third baffle 146 and the fourth baffle 147 are both in contact with the second sidewall, and the second drive plate is positioned closer to the first sidewall in the second direction, the steam can move along the lateral connection points in the first direction after converging in these "dead zones," and the steam flow will not be obstructed. Similarly, the second sidewall... When steam entering from one side of the wall passes through the third baffle 146, the second drive plate, and the fourth baffle 147, it will more easily converge at the contact point between the third baffle 146 and the second sidewall, the connection point between the second drive plate and the first sidewall, and the contact point between the fourth baffle 147 and the second sidewall, creating "dead zones" at these locations. However, since the isolation plate 170 has gaps between its two ends in the second direction and both the first and second sidewalls, and both the first baffle 144 and the second baffle 145 are in contact with the first sidewall, and the first drive plate 152 is positioned closer to the second sidewall in the second direction, after the steam converges in these "dead zones," it can move along the lateral connection point in the first direction without obstructing the flow of steam, allowing the heat of the steam to be fully utilized.

[0046] After the steam condenses in the lower chamber 122, it can flow along the first baffle 144 and the second baffle 145 to the first opening 173, flow downward in the first plate 171 to the connecting plate 175, and then flow along the third baffle 146 and the fourth baffle 147 to the second opening 174, flow downward in the second plate 172 to the connecting plate 175, and finally flow from the connecting plate 175 to the collecting pipe 176 for recycling and reuse. This avoids condensate remaining in the lower chamber 122, which would affect the normal heat exchange of the steam and improve the evaporation efficiency.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An evaporation treatment device suitable for high-salinity ammonium chloride wastewater, characterized in that: The system includes a single-effect processing unit, which includes an evaporator. The evaporator includes a shell and multiple heat exchange sections. The shell is arranged vertically, and the multiple heat exchange sections are arranged side-by-side within the shell along a first direction, which is horizontal. Each heat exchange section includes a baffle plate and multiple heat exchange tubes. The baffle plate is slidably installed within the shell along a second direction, which is horizontal and perpendicular to the first direction. The baffle plate of the multiple heat exchange sections divides the shell into an independent upper chamber and a lower chamber. The lower chamber has an air inlet and an exhaust outlet, with the air inlet located above the exhaust outlet. The upper chamber has... It has an air outlet; multiple heat exchange tubes are arranged side by side in the lower chamber along the second direction, the heat exchange tubes include an upper tube, a middle tube and a lower tube arranged in sequence in the vertical direction, and the upper tube is located above the lower tube; the upper tube can be slidably installed on the partition plate, the upper end of the upper tube extends into the upper chamber, and the lower tube is fixedly installed in the lower chamber; the middle tube is ball-hinged with the upper tube and the lower tube respectively, and in the initial state, the middle tube is inclined relative to the vertical direction, and the middle tube can rotate relative to the upper tube and the lower tube, so that the middle tube rotates from the inclined direction to the vertical; a feed port is opened at the lower end of the lower chamber, and the feed port is connected to multiple lower tubes respectively.

2. The evaporation treatment equipment for high-salinity ammonium chloride wastewater according to claim 1, characterized in that: A fixed plate is fixedly installed inside the lower chamber. Multiple connecting ports are opened on the fixed plate, and each connecting port is set to correspond with a lower tube. The lower tube is fixedly installed on the fixed plate and is connected to the feed port through the connecting ports.

3. The evaporation treatment equipment for high-salinity ammonium chloride wastewater according to claim 1, characterized in that: Multiple heat exchange sections are divided into multiple first sections and multiple second sections arranged sequentially in a second direction, and the first sections and second sections are alternately distributed in the second direction. The inclination direction of the middle tube of the heat exchange tube in the first section is opposite to the inclination direction of the middle tube of the heat exchange tube in the second section. A first driving member and a second driving member are provided on the lower chamber. The first driving member is used to rotate the middle tube of the heat exchange tube in the first section from the inclined position to the vertical position, and the second driving member is used to rotate the middle tube of the heat exchange tube in the second section from the inclined position to the vertical position.

4. The evaporation treatment equipment for high-salinity ammonium chloride wastewater according to claim 3, characterized in that: The first driving component includes a first hydraulic cylinder and multiple first driving plates. The first hydraulic cylinder is mounted on the lower chamber. The output end of the first hydraulic cylinder is arranged along a second direction and a first main plate is mounted on it. A first driven plate is slidably mounted on the first main plate. Multiple first driving plates are arranged side by side on the first driven plate along a first direction and are fixedly connected to the first driven plate. Each first driving plate corresponds to a first part. The middle tube of the heat exchange tube in each first part is ball-jointed with the first driving plate. The second driving component includes a second hydraulic cylinder and multiple second driving plates. The second hydraulic cylinder is mounted on the lower chamber. The output end of the second hydraulic cylinder is arranged along a second direction and a second main plate is mounted on it. A second driven plate is slidably mounted on the second main plate. Multiple second driving plates are arranged side by side on the second driven plate along a first direction and are fixedly connected to the second driven plate. Each second driving plate corresponds to a second part. The middle tube of the heat exchange tube in each second part is ball-jointed with the second driving plate.

5. The evaporation treatment equipment for high-salinity ammonium chloride wastewater according to claim 4, characterized in that: A partition plate is provided between every two adjacent first parts and second parts in the first direction; the partition plate is arranged vertically and its upper end abuts against the partition plate, and its lower end is fixedly connected to the lower chamber; in the first part, multiple upper pipes are connected to each other through a first baffle plate, and multiple lower pipes are connected to each other through a second baffle plate; in the second part, multiple upper pipes are connected to each other through a third baffle plate, and multiple lower pipes are connected to each other through a fourth baffle plate; two air inlets are provided, and the two air inlets are located at the two ends of the lower chamber in the second direction.

6. The evaporation treatment equipment for high-salinity ammonium chloride wastewater according to claim 5, characterized in that: The two sidewalls of the lower chamber in the second direction are referred to as the first sidewall and the second sidewall, respectively. The two ends of the partition plate in the second direction are spaced apart from the first sidewall and the second sidewall. In the initial state, the first baffle and the second baffle are both in contact with the first sidewall, and the third baffle and the fourth baffle are both in contact with the second sidewall. The first drive plate is set on the side of the second sidewall in the second direction, and the second drive plate is set on the side of the first sidewall in the second direction.

7. The evaporation treatment equipment for high-salinity ammonium chloride wastewater according to claim 6, characterized in that: The first and third baffles are equidistant from the bottom wall of the lower chamber in the vertical direction, and the second and fourth baffles are equidistant from the bottom wall of the lower chamber in the vertical direction. In the vertical direction, the air inlet is located between the baffle and the first baffle.

8. An evaporation treatment device suitable for high-salinity ammonium chloride wastewater according to claim 6, characterized in that: Both air inlets are equipped with air intake pipes, both of which are located outside the housing and are interconnected. A main air pipe is installed at the connection point of the two air intake pipes.

9. An evaporation treatment device suitable for high-salinity ammonium chloride wastewater according to claim 6, characterized in that: Multiple baffles are divided into multiple first plates and multiple second plates arranged sequentially in the second direction, with the first plates and second plates alternately distributed in the second direction. The first plates and the first parts are arranged in a one-to-one correspondence, and the second plates and the second parts are arranged in a one-to-one correspondence. The first baffle and the second baffle abut against the first plates they are arranged with. The third baffle and the fourth baffle abut against the second plates they are arranged with. The first plates and the second plates are hollow inside, and the first plates have two first openings, which are connected to the first openings. The second plates have two second openings, which are connected to the second openings.

10. An evaporation treatment device suitable for high-salinity ammonium chloride wastewater according to claim 9, characterized in that: The lower ends of multiple first plates and multiple second plates are connected to each other through connecting plates. The multiple connecting plates are all set at an angle. The two ends of the connecting plates in the vertical direction are called the first end and the last end, respectively. The first end is located above the last end, and a collecting pipe is provided on one side of the last end, with the collecting pipe extending out of the shell.

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