A sampling device for the analysis and detection of free ammonia in waste desalination liquid

Abstract

This invention relates to a sampling device for analyzing and detecting free ammonia in waste desalination liquid, comprising a water inlet pipe, a flow guiding unit, a locking unit, and a homogenizing unit. The water inlet pipe is connected to the flow guiding unit; the flow guiding unit is connected to the locking unit; and the flow guiding unit is connected to the homogenizing unit. The flow guiding unit intercepts the waste desalination liquid in the water inlet pipe, and the homogenizing unit homogenizes the intercepted waste desalination liquid. This invention guides the waste desalination liquid into a homogenizing tank, where a stirring paddle slowly rotates to mix the waste desalination liquid, ensuring the uniformity of the waste desalination liquid sample. A cooling tube cools the waste desalination liquid to increase its solubility for ammonia, ensuring the accuracy of the waste desalination liquid sampling and detection. After the waste desalination liquid enters the sampling box, a piston drives the waste desalination liquid upwards until it flows out from the outlet pipe port, thus completing the waste desalination liquid sampling and achieving real-time sampling.

Description

Technical Field

[0001] This invention relates to the field of soda ash production, and in particular to a sampling device for analyzing and detecting free ammonia in waste desalination liquid. Background Technology

[0002] In existing soda ash production, nitrogen distillation is generally used to recover ammonia from waste desalination. In order to ensure process parameters and meet residual liquid discharge standards, the concentration of free ammonia in waste desalination needs to be detected and compared regularly during the ammonia distillation process.

[0003] Currently, on-site manual sampling is generally adopted. However, since waste desalination contains free ammonia, if a leak occurs during sampling, the ammonia in the desalination will escape into the air in gaseous form, causing air pollution and affecting the health of workers. Furthermore, during the real-time sampling of waste desalination, the sampling environment is constantly changing, making it difficult to guarantee the uniformity of the sample. Multiple samplings of waste desalination are required, which also increases the risk of free ammonia leakage. Summary of the Invention

[0004] The technical problem of this invention is:

[0005] To overcome the drawbacks of air pollution caused by leakage of free ammonia from waste distillation during manual analysis and sampling, and the difficulty in ensuring sample uniformity during real-time sampling, which increases the risk of free ammonia leakage, this invention provides a sampling device for the analysis and detection of free ammonia in waste distillation.

[0006] To solve the above-mentioned technical problems, the technical implementation scheme adopted by the present invention is as follows:

[0007] A sampling device for analyzing and detecting free ammonia in waste desalination liquid includes a water inlet pipe and a sealing head; a sealing head is connected to the left and right ends of the water inlet pipe; it also includes a drainage unit, a locking unit, a homogenizing unit, a liquid extraction unit, and a reconstitution unit; the water inlet pipe is connected to the drainage unit; the drainage unit is connected to the locking unit; the drainage unit is connected to the homogenizing unit; the front end of the drainage unit is connected to the liquid extraction unit; the drainage unit intercepts the waste desalination liquid in the water inlet pipe, and the homogenizing unit homogenizes the intercepted waste desalination liquid; the liquid extraction unit extracts a portion of the sample from the mixed waste desalination liquid; the rear end of the drainage unit is connected to the reconstitution unit for re-integrating free ammonia into the mixed liquid; the reconstitution unit is connected to the homogenizing unit.

[0008] Further explanation: The drainage unit includes a sealing component, an L-shaped pipe, a first support rod, a homogenizing tank, a first conduit, a vertical pipe, and a water pump; the sealing component is connected to the middle of the drainage pipe; the L-shaped pipe is connected to the left side of the drainage pipe; the L-shaped pipe is connected to the locking unit; three first support rods are fixedly connected in a ring array in the middle of the drainage pipe; all three first support rods are located above the sealing component; the homogenizing tank is fixedly connected between the three first support rods; the homogenizing tank is connected to the homogenizing unit; the homogenizing tank is connected to the liquid extraction unit; the homogenizing tank is connected to the reconstitution unit; a drain outlet is opened at the front of the homogenizing tank; the L-shaped pipe is connected to the left side of the homogenizing tank; a water pump for extracting the remaining waste dilute liquid is connected to the right side of the homogenizing tank; the connection between the homogenizing tank and the L-shaped pipe is higher than the connection between the homogenizing tank and the water pump input end; the water pump output end is connected to the first conduit; the vertical pipe is connected to the right side of the first conduit; the vertical pipe is connected to the locking unit; the lower part of the vertical pipe is connected to the drainage pipe.

[0009] To further explain, the sealing assembly also includes a first support plate, a first power assembly, and a ball valve; a first support plate is fixedly connected to the front and rear of the water inlet pipe; the first power assembly is installed on the lower part of the two first support plates; the output shaft of the first power assembly is connected to the ball valve; the ball valve is located inside the water inlet pipe.

[0010] To further explain, the locking unit includes a sealing component, a first electric actuator, and a rope rod; the sealing component is connected inside the L-shaped tube; another sealing component is connected inside the vertical tube; the first electric actuator is installed at the rear of the vertical tube; the rope rod is fixedly connected to the telescopic part of the first electric actuator; the front part of the rope rod is slidably connected to the vertical tube; the front part of the rope rod is connected to the sealing component on the right.

[0011] To further explain, the sealing assembly also includes a second support plate, a first elastic element, a conical rod, and a constricting member; the second support plate is fixedly connected to the inner surface of the L-shaped tube; the first elastic element is fixedly connected to the lower surface of the second support plate; the conical rod is fixedly connected to the lower part of the first elastic element; the upper part of the conical rod is slidably connected to the second support plate; the constricting member is fixedly connected to the inner surface of the L-shaped tube; the opening side of the constricting member faces the conical rod; the constricting member is in contact with the conical rod; the top of the conical rod on the right is fixedly connected to the rope rod.

[0012] To further explain, the homogenization unit includes a second power unit, a stirring paddle, and a cooling pipe; the second power unit is installed on the top of the homogenization tank; the second power unit is a servo motor; the output shaft of the second power unit is fixedly connected to the stirring paddle; the stirring paddle is connected to the redissolving unit; the stirring paddle is located inside the homogenization tank; a cooling pipe for cooling the waste desalinated liquid is installed on the lower part of the inner surface of the homogenization tank.

[0013] Further explanation: The liquid extraction unit includes a liquid collection box, a second conduit, an outlet pipe, a second electric actuator, a connecting plate, a second support rod, a piston, and a filter screen; the liquid collection box is connected to the front of the homogenizing tank; the bottom of the liquid collection box is lower than the bottom of the homogenizing tank; the second conduit is connected to the left side of the liquid collection box; the rear of the second conduit is connected to the homogenizing tank; an outlet pipe for drawing out waste dilute liquid samples is connected to the left side of the liquid collection box; a second electric actuator is installed at the front of the liquid collection box; a connecting plate is fixedly connected to the telescopic part of the second electric actuator; two second support rods are fixedly connected to the rear of the connecting plate; the two second support rods are slidably connected to the liquid collection box; a piston is fixedly connected to the lower part of the two second support rods; the piston is slidably connected to the inner surface of the liquid collection box; a filter screen is fixedly connected to the drain outlet at the front of the homogenizing tank.

[0014] Further explanation: The remelting unit includes an air compressor, a third conduit, an aeration pipe, a bell, a second elastic element, a vertical plate, a filter element, an arc plate, and a lever. An air compressor is installed at the rear of the homogenizing tank. The upper part of the air compressor is connected to the third conduit. The front of the third conduit is connected to the homogenizing tank. The lower part of the air compressor is connected to the aeration pipe. The bottom of the aeration pipe contacts the bottom wall of the homogenizing tank. The lower part of the aeration pipe has an opening that communicates with the interior of the homogenizing tank. The third conduit is connected to the bell. A slot is opened on the left and right sides of the bell. A second elastic element is fixedly connected to the front and rear of the bell. A vertical plate is fixedly connected to the lower parts of the two second elastic elements. The vertical plate slides on the two slots of the bell. A filter element is fixedly connected to the upper surface of the vertical plate. The filter element cooperates with the bell. An arc plate is fixedly connected to the lower part of the vertical plate. The axis of the arc plate is aligned with the axis of the output shaft of the second power component. A lever is fixedly connected to the upper part of the stirring paddle. The lever contacts the arc plate for transmission.

[0015] To further explain, the filter element is a cylindrical sponge block used for moisture absorption.

[0016] To further explain, the lower part of the arc plate has a smooth arc-shaped cross-section.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. Seal the water inlet pipe with a ball valve to guide the waste desalination liquid into the homogenizing tank. Rotate the agitator slowly to mix the waste desalination liquid and ensure the uniformity of the waste desalination liquid sampling. Cool the waste desalination liquid with a cooling pipe to increase the solubility of ammonia in the waste desalination liquid and ensure the accuracy of the waste desalination liquid sampling and testing.

[0019] 2. The homogenizing tank is connected to the sampling box through the lower opening. The waste dilute liquid will also enter the sampling box. The piston drives the waste dilute liquid to move upward until the waste dilute liquid flows out from the outlet pipe. Only a sample collection tube needs to be set at the outlet pipe to complete the sampling of waste dilute liquid, realize the real-time sampling of waste dilute liquid, and effectively avoid the environmental impact caused by leakage from manual sampling. Attached Figure Description

[0020] Figure 1This is a schematic diagram of the first three-dimensional structure of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention.

[0021] Figure 2 This is a schematic diagram of a second three-dimensional structure of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention.

[0022] Figure 3 This is a three-dimensional structural diagram of the drainage unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention;

[0023] Figure 4 This is a cross-sectional view of the drainage unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention;

[0024] Figure 5 This is a three-dimensional structural diagram of the locking unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention;

[0025] Figure 6 This is a schematic diagram of the three-dimensional structure of the homogenizing unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention.

[0026] Figure 7 This is a three-dimensional structural diagram of the sampling unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention;

[0027] Figure 8 This is a cross-sectional view of the sampling unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention;

[0028] Figure 9 This is a three-dimensional structural diagram of the resolution unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention;

[0029] Figure 10 This is a partial three-dimensional structural diagram of the resolution unit of the sampling device for analyzing and detecting free ammonia in waste desalination liquid according to the present invention.

[0030] The markings in the attached diagram are: 1-Water inlet pipe, 2-Sealing head, 101-First support plate, 102-First power assembly, 103-L-shaped pipe, 104-First support rod, 105-Homogenizing tank, 106-First conduit, 107-Vertical pipe, 108-Ball valve, 109-Water pump, 201-Second support plate, 202-First elastic element, 203-Conical rod, 204-Narrowing part, 205-First electric actuator, 206-Rope rod, 301-Second power assembly Components: 302-Agitator, 303-Cooling pipe, 401-Liquid collection box, 402-Second conduit, 403-Liquid outlet pipe, 404-Second electric actuator, 405-Connecting plate, 406-Second support rod, 407-Piston, 408-Filter screen, 501-Air compressor, 502-Third conduit, 503-Aeration pipe, 504-Sound tube, 505-Second elastic element, 506-Vertical plate, 507-Filter element, 508-Arc plate, 509-Toggle lever. Detailed Implementation

[0031] The present invention will be further described below with reference to specific embodiments. The illustrative embodiments and descriptions herein are used to explain the present invention, but are not intended to limit the present invention.

[0032] Specific Implementation Method 1

[0033] A sampling device for analyzing and detecting free ammonia in waste desalination liquid, based on Figure 1-10 As shown, it includes a water inlet pipe 1 and a sealing head 2; a sealing head 2 is connected to the left and right sides of the water inlet pipe 1.

[0034] It also includes a drainage unit, a locking unit, a homogenizing unit, a liquid extraction unit, and a reconstitution unit; the water inlet pipe 1 is connected to the drainage unit; the drainage unit is connected to the locking unit; the drainage unit is connected to the homogenizing unit; the front of the drainage unit is connected to the liquid extraction unit; the drainage unit intercepts the waste dilute liquid in the water inlet pipe 1, and the homogenizing unit homogenizes the intercepted waste dilute liquid; the liquid extraction unit extracts a portion of the mixed waste dilute liquid; the rear of the drainage unit is connected to the reconstitution unit; the reconstitution unit is connected to the homogenizing unit.

[0035] Second specific implementation method

[0036] Based on the first specific implementation method, according to Figure 1 and Figure 3-4As shown, the drainage unit includes a sealing assembly, an L-shaped pipe 103, a first support rod 104, a homogenizing tank 105, a first conduit 106, a vertical pipe 107, and a water pump 109; the sealing assembly is connected to the middle of the water pipe 1; the L-shaped pipe 103 is connected to the left side of the water pipe 1; the L-shaped pipe 103 is connected to the locking unit; three first support rods 104 are welded in a ring array in the middle of the water pipe 1; all three first support rods 104 are located above the sealing assembly; the homogenizing tank 105 is welded together between the three first support rods 104; the homogenizing tank 105 is connected to the homogenizing unit; The homogenizing tank 105 is connected to the liquid extraction unit; the homogenizing tank 105 is connected to the reconstitution unit; a drain outlet is opened at the front of the homogenizing tank 105; an L-shaped pipe 103 is connected to the left side of the homogenizing tank 105; a water pump 109 is connected to the right side of the homogenizing tank 105; the connection point between the homogenizing tank 105 and the L-shaped pipe 103 is higher than the connection point between the homogenizing tank 105 and the input end of the water pump 109; a first conduit 106 is connected to the output end of the water pump 109; a vertical pipe 107 is connected to the right side of the first conduit 106; the vertical pipe 107 is connected to the locking unit; the lower part of the vertical pipe 107 is connected to the water inlet pipe 1.

[0037] according to Figure 1 and Figure 3-4 As shown, the sealing assembly also includes a first support plate 101, a first power assembly 102, and a ball valve 108; a first support plate 101 is bolted to the front and rear of the water inlet pipe 1; the first power assembly 102 is installed on the lower part of the two first support plates 101; the first power assembly 102 is a servo motor; the output shaft of the first power assembly 102 is connected to the ball valve 108; the ball valve 108 is located inside the water inlet pipe 1.

[0038] according to Figure 1 and Figure 5 As shown, the locking unit includes a sealing assembly, a first electric actuator 205, and a rope 206; the sealing assembly is connected inside the L-shaped tube 103; another sealing assembly is connected inside the vertical tube 107; the first electric actuator 205 is installed at the rear of the vertical tube 107; the first electric actuator 205 is an electric push rod; the rope 206 is fixedly connected to the telescopic part of the first electric actuator 205; the front part of the rope 206 is slidably connected to the vertical tube 107; the front part of the rope 206 is connected to the sealing assembly on the right.

[0039] according to Figure 1 and Figure 5As shown, the sealing assembly also includes a second support plate 201, a first elastic element 202, a conical rod 203, and a constriction member 204; the second support plate 201 is welded to the inner surface of the L-shaped tube 103; the first elastic element 202 is fixedly connected to the lower surface of the second support plate 201; the first elastic element 202 is a spring; the conical rod 203 is fixedly connected to the lower part of the first elastic element 202; the upper part of the conical rod 203 is slidably connected to the second support plate 201; the constriction member 204 is welded to the inner surface of the L-shaped tube 103; the opening side of the constriction member 204 faces the conical rod 203; the constriction member 204 is in contact with the conical rod 203; the top of the right-hand conical rod 203 is welded to the rope rod 206.

[0040] according to Figure 1 and Figure 6 As shown, the homogenization unit includes a second power assembly 301, a stirring paddle 302, and a cooling pipe 303; the second power assembly 301 is installed on the top of the homogenization tank 105; the second power assembly 301 is a servo motor; the output shaft of the second power assembly 301 is fixedly connected to the stirring paddle 302; the stirring paddle 302 is connected to the remelting unit; the stirring paddle 302 is located inside the homogenization tank 105; the cooling pipe 303 is installed on the lower part of the inner surface of the homogenization tank 105.

[0041] according to Figure 1 and Figure 7-8 As shown, the liquid extraction unit includes a liquid collection box 401, a second conduit 402, an outlet pipe 403, a second electric actuator 404, a connecting plate 405, a second support rod 406, a piston 407, and a filter screen 408; the liquid collection box 401 is connected to the front of the homogenizing tank 105; the bottom of the liquid collection box 401 is lower than the bottom of the homogenizing tank 105, and the difference in height is used to house the piston 407; the second conduit 402 is connected to the left side of the liquid collection box 401; the rear of the second conduit 402 is connected to the homogenizing tank 105; the outlet pipe 403 is connected to the left side of the liquid collection box 401. Liquid pipe 403; a second electric actuator 404 is installed at the front of liquid collection box 401; the second electric actuator 404 is an electric push rod; a connecting plate 405 is fixedly connected to the telescopic part of the second electric actuator 404; two second support rods 406 are welded to the rear of the connecting plate 405; the two second support rods 406 are slidably connected to the liquid collection box 401; a piston 407 is fixedly connected to the lower part of the two second support rods 406; the piston 407 is slidably connected to the inner surface of the liquid collection box 401; a filter screen 408 is fixedly connected to the drain outlet at the front of the homogenizing tank 105.

[0042] according to Figure 1 and Figure 9-10As shown, the remelting unit includes an air compressor 501, a third conduit 502, an aeration pipe 503, a horn 504, a second elastic element 505, a vertical plate 506, a filter element 507, an arc plate 508, and a lever 509; the air compressor 501 is installed at the rear of the homogenizing tank 105; the upper part of the air compressor 501 is connected to the third conduit 502; the front part of the third conduit 502 is connected to the homogenizing tank 105; the lower part of the air compressor 501 is connected to the aeration pipe 503; the bottom of the aeration pipe 503 is in contact with the bottom wall of the homogenizing tank 105; the lower part of the aeration pipe 503 has an opening that communicates with the interior of the homogenizing tank 105; the third conduit 502 is connected to the horn 504; the horn... The left and right sides of the cylinder 504 each have a slotted groove; the front and rear of the horn cylinder 504 each have a second elastic element 505 fixedly connected; the second elastic element 505 is a spring; the lower parts of the two second elastic elements 505 are fixedly connected to a vertical plate 506; the vertical plate 506 slides on the two slotted grooves of the horn cylinder 504; a filter element 507 is fixedly connected to the upper surface of the vertical plate 506; the filter element 507 cooperates with the horn cylinder 504; an arc plate 508 is bolted to the lower part of the vertical plate 506; the axis of the arc plate 508 is consistent with the axis of the output shaft of the second power assembly 301; a lever 509 is fixedly connected to the upper part of the stirring paddle 302; the lever 509 contacts and drives the arc plate 508.

[0043] Filter element 507 is a cylindrical sponge block used for moisture absorption.

[0044] The lower part of the arc plate 508 has a smooth arc-shaped cross-section.

[0045] Working principle:

[0046] Installation phase:

[0047] See the attached diagram, in which Figures 1 to 2 The specific implementation process shown is as follows:

[0048] First, fix the free ammonia sampling device in the soda ash production workshop and connect it to the power supply in the workshop. Then, connect the waste desalination discharge pipe of the original desalination tower to the left sealing head 2 of the free ammonia sampling device. Then, discharge the waste desalination into the designated treatment pool through the water inlet pipe 1 connected to the right sealing head 2.

[0049] Water storage stage:

[0050] See the attached diagram, in which Figures 3 to 6 The specific implementation process shown is as follows:

[0051] When sampling of the waste desalinated liquid is required, the first power unit 102 is activated. The output shaft of the first power unit 102 rotates, synchronously driving the ball valve 108 to block the water inlet pipe 1. The first power unit 102 is then shut off. When the waste desalinated liquid flows out of the desalination tower to the left side of the water inlet pipe 1, the waste desalinated liquid can only enter the L-shaped pipe 103 because the middle of the water inlet pipe 1 is blocked by the ball valve 108. Then, due to the liquid pressure, the waste desalinated liquid in the L-shaped pipe 103 pushes the conical rod 203 upward, compressing the first elastic element 202. The conical rod 203 separates from the constriction part 204, and the waste desalinated liquid continues to flow in the L-shaped pipe 103 through the gap between the constriction part 204 and the conical rod 203. Then, the waste desalinated liquid enters the homogenization tank 105. When the liquid level of the waste desalinated liquid reaches the interface between the L-shaped pipe 103 and the homogenization tank 105, the control... The first power component 102 is activated, simultaneously opening the ball valve 108 and connecting the left and right sides of the water inlet pipe 1. At this time, the liquid pressure in the L-shaped pipe 103 decreases, the first elastic element 202 recovers, and simultaneously drives the cone rod 203 to move downward until the cone rod 203 engages with the constriction part 204, sealing the L-shaped pipe 103. This prevents the waste dilute liquid from flowing through the water inlet pipe 1 and impacting the interface between the water inlet pipe 1, L-shaped pipe 103, and vertical pipe 107. As a result, the free ammonia in the waste dilute liquid would escape as ammonia gas. By sealing the L-shaped pipe 103 and vertical pipe 107, the ammonia gas that escapes from the waste dilute liquid will not enter the homogenizing tank 105 through the L-shaped pipe 103 and vertical pipe 107, thus affecting the concentration of free ammonia in the homogenizing tank 105.

[0052] Next, the second power unit 301 is started. The output shaft of the second power unit 301 rotates, and the stirring paddle 302 rotates slowly in sync to mix the waste distillate, ensuring the uniformity of the waste distillate sampling. This prevents the waste distillate in the homogenizing tank 105 from moving too violently, which could lead to a decrease in the solubility of free ammonia in the waste distillate, ammonia gas escape, and a decrease in the accuracy of free ammonia detection in the waste distillate. At the same time, in order to reduce the amount of free ammonia gas that has already escaped in the homogenizing tank 105, the cooling pipe 303 is started. After the cooling pipe 303 starts, it cools the waste distillate to increase the solubility of ammonia in the waste distillate and ensure the accuracy of the waste distillate sampling and detection.

[0053] When the waste desalinated liquid is stirred in the homogenizing tank 105, the ammonia gas and water vapor that escapes accumulate in the upper part of the homogenizing tank 105. At this time, the air compressor 501 is started. The air compressor 501 extracts the gas from the upper part of the homogenizing tank 105 through the third conduit 502 and the horn 504. The gas in the upper part of the homogenizing tank 105 contains not only ammonia gas but also water vapor. Before the gas is extracted into the third conduit 502, the gas is filtered through the filter element 507 to absorb the water. Then, to prevent the filter element 507 from absorbing too much water vapor and reducing its filtration efficiency, the stirring paddle 302 rotates, which also drives the lever 509 to rotate. When the lever 509 rotates to the position of the arc plate 508, the lever 509 contacts the lower arc-shaped sectional surface of the arc plate 508. The arc plate 508 drives the vertical plate 506 to move upward, and the two second elastic elements 505 are compressed. 06 also drives the filter element 507 to move upward. During the upward movement, the filter element 507 comes into contact with the inner wall of the horn tube 504, causing the filter element 507 to deform. The water absorbed inside the filter element 507 is squeezed out and then falls back into the homogenizing tank 105, effectively preventing the filter element 507 from absorbing too much water vapor and thus reducing the filtration efficiency. Then, the air compressor 501 pumps the gas back into the waste dilute liquid in the homogenizing tank 105 through the aeration pipe 503. With the stirring paddle 302 agitating the waste dilute liquid, the free ammonia is reintegrated into the waste dilute liquid, reducing the detection error of the waste dilute liquid. Then, after the lever 509 passes the lowest point of the lower part of the arc plate 508, the two second elastic elements 505 return to their original position, synchronously driving the vertical plate 506 to move downward. The lever 509 will squeeze the filter element 507 again after rotating one revolution, avoiding excessive impact on the filtration efficiency.

[0054] Sampling stage:

[0055] See the attached diagram, in which Figures 7 to 10 The specific implementation process shown is as follows:

[0056] Due to the principle of communicating vessels, the homogenizing tank 105 is connected to the liquid collection box 401 through the lower opening. Therefore, the waste distillate in the homogenizing tank 105 will also enter the liquid collection box 401. A piston 407 made of silicone material is set between the liquid collection box 401 and the homogenizing tank 105. When the piston 407 is embedded in the drop space, the waste distillate flowing into the liquid collection box 401 is all above the piston 407. Then, the second electric actuator 404 is activated. The second electric actuator 404 extends and synchronously drives the connecting plate 405 to drive the two second support rods 406 to move upward. The two second support rods 406 together drive the piston 407 to move upward in the liquid collection box 401. The piston 407 drives the waste distillate to move upward until the liquid level of the waste distillate reaches the position of the liquid outlet pipe 403. The waste distillate flows out from the port of the liquid outlet pipe 403. Only a sample collection tube needs to be set at the port of the liquid outlet pipe 403 to complete the sampling of the waste distillate. It will not affect the distillation process of the distillate.

[0057] When piston 407 moves the waste desalinated liquid upwards, it divides the space inside sampling box 401 into two parts, which are isolated from each other. This effectively prevents free ammonia in homogenizing tank 105 from escaping to the outside through outlet pipe 403, thus affecting the accuracy of sampling. As piston 407 moves upwards, water vapor and free ammonia also escape from the waste desalinated liquid. The escaped free ammonia accumulates at the top of sampling box 401 and cannot be collected. Therefore, during the process of lifting the waste desalinated liquid, the water vapor and free ammonia at the top of sampling box 401 re-enter homogenizing tank 105 through second conduit 402, ensuring that ammonia does not escape. By repeating the above operation, the waste desalinated liquid is sampled multiple times to avoid experimental errors caused by a single result.

[0058] After sampling is completed, the first electric actuator 205 is activated. The first electric actuator 205 extends, synchronously driving the rope 206. The rope 206 drives the right conical rod 203 upward, causing the right conical rod 203 to separate from the corresponding constriction part 204, creating a gap between the conical rod 203 and the corresponding constriction part 204. The first electric actuator 205 is then deactivated. Next, the water pump 109 is activated. The water pump 109 extracts the remaining waste dilute liquid from the homogenization tank 105 and pumps it into the vertical pipe 107. The waste dilute liquid entering the vertical pipe 107 flows downward through the gap between the conical rod 203 and the corresponding constriction part 204, finally allowing the waste dilute liquid to flow back into the water inlet pipe 1. This prevents the waste dilute liquid from remaining in the homogenization tank 105, which could corrode the homogenization tank 105 and affect the service life of the equipment. The above operation is repeated to sample the waste dilute liquid multiple times, avoiding experimental errors caused by a single result.

[0059] It should be understood that the above description is for illustrative purposes only and is not intended to limit the invention. Those skilled in the art will understand that variations of the invention are included within the scope of the claims herein.

Claims

1. A sampling device for detecting free ammonia in waste dilute liquor, comprising a water guide pipe (1) and a sealing head (2); A sealing head (2) is connected to the left and right parts of the water guide pipe (1); The application is characterized in that It also comprises a flow guiding unit, a locking unit, a homogenizing unit, a liquid pumping unit and a redissolving unit; the water guide pipe (1) is connected to the flow guiding unit; the flow guiding unit is connected to the locking unit; the flow guiding unit is connected to the homogenizing unit; the front part of the flow guiding unit is connected to the liquid pumping unit; the flow guiding unit intercepts the waste dilute liquor in the water guide pipe (1), and the homogenizing unit homogenizes the intercepted waste dilute liquor; the liquid pumping unit pumps out part of the mixed waste dilute liquor; the rear part of the flow guiding unit is connected to the redissolving unit for re-dissolving free ammonia into the mixed liquid; the redissolving unit is connected to the homogenizing unit; The flow guiding unit comprises a plugging assembly, an L-shaped pipe (103), a first supporting rod (104), a homogenizing barrel (105), a first conduit (106), a vertical pipe (107) and a water pump (109); The middle part of the water guide pipe (1) is connected to the plugging assembly; the left part of the water guide pipe (1) is connected to the L-shaped pipe (103); the L-shaped pipe (103) is connected to the locking unit; the middle part of the water guide pipe (1) is fixedly connected to three first supporting rods (104) in an annular array; the three first supporting rods (104) are located above the plugging assembly; the three first supporting rods (104) are jointly fixedly connected to the homogenizing barrel (105); the homogenizing barrel (105) is connected to the homogenizing unit; the homogenizing barrel (105) is connected to the liquid pumping unit; the homogenizing barrel (105) is connected to the redissolving unit; the front part of the homogenizing barrel (105) is provided with a water outlet; the left part of the homogenizing barrel (105) is communicated with the L-shaped pipe (103); the right part of the homogenizing barrel (105) is connected to the water pump (109) for pumping out the remaining waste dilute liquor; the communication port position of the homogenizing barrel (105) and the L-shaped pipe (103) is higher than that of the homogenizing barrel (105) and the water pump (109); the output end of the water pump (109) is communicated with the first conduit (106); the right part of the first conduit (106) is communicated with the vertical pipe (107); the vertical pipe (107) is connected to the locking unit; the lower part of the vertical pipe (107) is communicated with the water guide pipe (1); The homogenizing unit comprises a second power assembly (301), a stirring paddle (302) and a cooling pipe (303); The top part of the homogenizing barrel (105) is provided with the second power assembly (301); the second power assembly (301) is a servo motor; the output shaft of the second power assembly (301) is fixedly connected to the stirring paddle (302); the stirring paddle (302) is connected to the redissolving unit; the stirring paddle (302) is located in the homogenizing barrel (105); the inner surface of the homogenizing barrel (105) is provided with the cooling pipe (303) at the lower part for cooling the waste dilute liquor; The liquid extraction unit comprises a liquid taking box (401), a second conduit (402), a liquid outlet pipe (403), a second electric actuator (404), a connecting plate (405), a second supporting rod (406), a piston (407) and a filter screen (408); the front part of the homogenizing barrel (105) is connected with the liquid taking box (401); the bottom of the liquid taking box (401) is lower than the bottom of the homogenizing barrel (105); the left part of the liquid taking box (401) is connected with the second conduit (402); the rear part of the second conduit (402) is connected with the homogenizing barrel (105); the left part of the liquid taking box (401) is connected with the liquid outlet pipe (403) for leading out the waste dilute liquid sample; the front part of the liquid taking box (401) is installed with the second electric actuator (404); the telescopic part of the second electric actuator (404) is fixedly connected with the connecting plate (405); the rear part of the connecting plate (405) is fixedly connected with two second supporting rods (406); the two second supporting rods (406) are jointly and slidably connected with the liquid taking box (401); the lower parts of the two second supporting rods (406) are jointly and fixedly connected with the piston (407); the piston (407) is slidably connected with the inner surface of the liquid taking box (401); the front part of the homogenizing barrel (105) is fixedly connected with the filter screen (408); The redissolution unit comprises an air compressor (501), a third conduit (502), an aeration pipe (503), a horn cylinder (504), a second elastic member (505), a vertical plate (506), a filter member (507), an arc plate (508) and a pushing rod (509); the rear part of the homogenizing barrel (105) is installed with the air compressor (501); the upper part of the air compressor (501) is connected with the third conduit (502); the front part of the third conduit (502) is connected with the homogenizing barrel (105); the lower part of the air compressor (501) is connected with the aeration pipe (503); the bottom of the aeration pipe (503) is in contact with the bottom wall of the homogenizing barrel (105); the lower part of the aeration pipe (503) is provided with an opening, which is connected with the inside of the homogenizing barrel (105); the third conduit (502) is connected with the horn cylinder (504); the left and right parts of the horn cylinder (504) are respectively provided with one linear sliding slot; the front and rear parts of the horn cylinder (504) are respectively fixedly connected with one second elastic member (505); the lower parts of the two second elastic members (505) are jointly and fixedly connected with the vertical plate (506); the vertical plate (506) slides on the two linear sliding slots of the horn cylinder (504); the upper surface of the vertical plate (506) is fixedly connected with the filter member (507); the filter member (507) cooperates with the horn cylinder (504); the lower part of the vertical plate (506) is fixedly connected with the arc plate (508); the axis of the arc plate (508) is consistent with the axis of the output shaft of the second power assembly (301); the upper part of the stirring paddle (302) is fixedly connected with the pushing rod (509); the pushing rod (509) is in contact and transmission with the arc plate (508).

2. The sampling device for the analysis of free ammonia in spent dilute liquor according to claim 1, characterized in that: The blocking assembly further comprises a first supporting plate (101), a first power assembly (102) and a ball valve (108); a first supporting plate (101) is fixed to the front and rear of the water conduit (1); the lower part of the two first supporting plates (101) is provided with the first power assembly (102); the output shaft of the first power assembly (102) is connected with the ball valve (108); and the ball valve (108) is located in the water conduit (1).

3. The sampling device for the analysis of free ammonia in spent dilute liquor according to claim 2, characterized in that: The locking unit comprises a sealing assembly, a first electric actuator (205) and a rope rod (206); The L-shaped pipe (103) is connected with the sealing assembly; another sealing assembly is connected in the vertical pipe (107); the first electric actuator (205) is installed at the rear of the vertical pipe (107); the rope rod (206) is fixed to the telescopic part of the first electric actuator (205); the front part of the rope rod (206) is connected with the sealing assembly on the right side in a sliding mode.

4. The sampling device for the analysis of free ammonia in spent dilute liquor according to claim 3, characterized in that: The sealing assembly further comprises a second supporting plate (201), a first elastic member (202), a conical head rod (203) and a necked member (204); The inner surface of the L-shaped pipe (103) is fixed with the second supporting plate (201); the lower surface of the second supporting plate (201) is fixed with the first elastic member (202); the lower part of the first elastic member (202) is fixed with the conical head rod (203); the upper part of the conical head rod (203) is connected with the second supporting plate (201) in a sliding mode; the inner surface of the L-shaped pipe (103) is fixed with the necked member (204); the opening side of the necked member (204) faces the conical head rod (203); the necked member (204) is in contact with the conical head rod (203); and the top of the conical head rod (203) on the right side is fixed with the rope rod (206).

5. The sampling device for analyzing and detecting free ammonia in waste dilute liquid according to claim 1, characterized in that: The filter member (507) is a cylindrical sponge block for absorbing moisture.

6. The sampling device for analyzing and detecting free ammonia in waste dilute liquid according to claim 1, characterized in that: The lower part of the arc plate (508) is a smooth arc-shaped section.

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