Treatment device for trichloroisocyanuric acid production wastewater and its usage method

Abstract

The present invention relates to the technical field of chemical wastewater treatment, and specifically relates to a treatment device and a usage method for the wastewater produced in the production of trichloroisocyanuric acid, including an adjustment tank, a chlorinolysis tank, a chlorine collection bin, a dechlorination tank, a sedimentation tank, a denitrification bin, an intermediate tank and an evaporation tank. The chlorine collection bin is provided with an air inlet, an air outlet and a pressure adjustment port. An air inlet pipe is provided on the air inlet, an air outlet pipe is provided on the air outlet, and a check valve is provided on the pressure adjustment port. A non-powered air induction component is provided between the air inlet pipe and the air outlet pipe. The non-powered air induction component includes a vortex fan, a paddle fan and a linkage mechanism. The non-powered air induction component in this device can increase the efficiency of chlorine collection in a non-powered manner. The pressure adjustment port in the chlorine collection bin is used to introduce an inert gas to adjust the pressure in the chlorine collection bin. The aeration disc provided in the denitrification bin is used to increase the contact area between chlorine and water, so that the chemical reaction between the water body and chlorine is faster and more complete.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical wastewater treatment, and specifically relates to a treatment device for trichloroisocyanuric acid production wastewater and a method for using the same. Background Art

[0002] Trichloroisocyanuric acid is a very strong oxidizing agent and chlorinating agent, generally used as a disinfecting and bleaching agent, and is applied in multiple fields. However, during the production of trichloroisocyanuric acid, wastewater with high pollution concentration and high salt content will be produced. Even after multiple steps of high-oxidation treatment, the discharge standard of such wastewater still fails to meet the sewage discharge index of our country, and the salt content in the wastewater is relatively high and needs to be recycled. Due to the inability of traditional collection methods to treat other harmful chemical elements in the water, the precipitated crude salt has a high chlorine content and the precipitation is incomplete. The Chinese patent with the publication number CN201510172577.5 in our country discloses a method for treating trichloroisocyanuric acid mother liquor wastewater, which solves the above problems. However, in the step of collecting chlorine gas, the collection method of chlorine gas is not reflected. And after trichloroisocyanuric acid is processed in large factories, due to the large amount of wastewater, in order to accelerate the reaction speed, it is necessary to improve the chlorine gas collection efficiency. Therefore, it is necessary to provide a treatment device for trichloroisocyanuric acid production wastewater and a method for using the same to solve the problem of chlorine gas collection efficiency. Summary of the Invention

[0003] Based on this, in view of the problems in the prior art, it is necessary to provide a treatment device for trichloroisocyanuric acid production wastewater and a method for using the same.

[0004] To solve the problems in the prior art, the technical solution adopted by the present invention is as follows:

[0005] A treatment device for trichloroisocyanuric acid production wastewater and a method for using the same, including an adjustment tank, a chlorinolysis tank, a chlorine gas collection bin, a dechlorination tank, a sedimentation tank, a denitrification bin, an intermediate tank and an evaporation tank. The adjustment tank is connected to the chlorinolysis tank, the chlorinolysis tank is connected to the dechlorination tank, the dechlorination tank is connected to the sedimentation tank, the sedimentation tank is connected to the denitrification bin, the denitrification bin is connected to the intermediate tank, and the intermediate tank is connected to the evaporation tank. The chlorine gas collection bin is arranged beside the chlorinolysis tank. Among them, the chlorine gas collection bin is provided with an air inlet, an air outlet and a pressure adjustment port. The air outlet and the air inlet are distributed vertically up and down. The air inlet is provided with an air inlet pipe for leading the chlorine gas generated by the chlorinolysis tank to the chlorine gas collection bin, the air outlet is provided with an air outlet pipe for leading the chlorine gas in the chlorine gas collection bin to the denitrification bin, the pressure adjustment port is provided with a one-way valve for discharging inert gas into the chlorine gas collection bin, and an unpowered air guiding component is arranged between the air inlet pipe and the air outlet pipe. The unpowered air guiding component includes:

[0006] A scroll fan, arranged in the air inlet pipe, for rotating to increase the flow rate of chlorine gas;

[0007] The paddle fan is arranged inside the air outlet pipe and can be driven to rotate by the air pressure generated in the chlorine collection bin.

[0008] The linkage mechanism is arranged between the turbofan and the paddle fan. When the paddle fan rotates, it can drive the rotation of the turbofan through the linkage mechanism, so as to increase the flow rate of the chlorine gas introduced into the air inlet pipe.

[0009] Furthermore, the air inlet pipe is in a horizontal state. The diameter of the end of the air inlet pipe close to the chlorine collection bin is smaller than that of the other end, and the middle part of the air inlet pipe is in a wasp-waist shape. The turbofan is in a drum shape and is coaxially connected inside the air inlet pipe. The air inlet end of the turbofan is close to the large-diameter end of the air inlet pipe. The small-diameter end of the air inlet pipe is connected to the air inlet through a first connecting pipe. A connecting pipe sleeve is coaxially fixed at the large-diameter end of the air inlet pipe. The end of the connecting pipe sleeve facing the air inlet pipe is an open structure, and a through hole is opened at the center of the other end. A connecting pipe coaxially formed inside the connecting pipe is connected to the through hole at one end, and the other end of the connecting pipe horizontally extends into the air inlet end of the turbofan.

[0010] Furthermore, a cylinder is coaxially arranged inside the air inlet pipe. The air inlet pipe is detachably divided into a first shell and a second shell that can tightly abut the cylinder against each other up and down to form a circle. The first shell and the second shell are fixedly connected by a plurality of snap connectors. One end of the cylinder close to the air inlet is a closed structure, and the other end is an open structure. A plurality of first ventilation grooves are evenly distributed on the side wall of the cylinder along its circumferential direction. The turbofan shaft is coaxially arranged inside the cylinder and is axially connected to the end of the cylinder close to the air inlet.

[0011] Furthermore, the axial direction of the air outlet pipe is the same as that of the air inlet pipe. One end of the air outlet pipe is connected to the air outlet through a second connecting pipe. A fixed disk is coaxially fixed inside the air outlet pipe. The fixed disk is located at the end of the air outlet pipe far from the second connecting pipe. A plurality of second ventilation grooves are evenly distributed on the fixed disk along its circumferential direction. A rotating shaft is coaxially axially connected at the center of the fixed disk. One end of the rotating shaft horizontally extends towards the second connecting pipe. The paddle fan is in a propeller shape and is coaxially fixed on the extending end of the rotating shaft.

[0012] Furthermore, the linkage mechanism includes:

[0013] A first external gear ring is coaxially sleeved on the air inlet end of the turbofan;

[0014] A transmission gear is axially connected to the top of the first shell. The axial direction of the transmission gear is parallel to that of the first external gear ring and meshes with the first external gear ring. A first avoidance through groove for the transmission gear to pass through and mesh with the first external gear ring is opened at the top of the first shell;

[0015] The drive disk is located inside the air outlet pipe and is coaxially and fixedly arranged on the rotating shaft. A number of third air vent grooves evenly distributed along the circumferential direction thereof are formed on the drive disk.

[0016] The second external gear ring is coaxially sleeved on the peripheral wall of the drive disk. The second external gear ring meshes with the transmission gear. A second avoidance through groove for the transmission gear to pass through and mesh with the second external gear ring is formed at the bottom of the air outlet pipe.

[0017] Furthermore, a first semi-circular baffle and a second semi-circular baffle capable of abutting against and combining into a circular ring in the vertical direction at the end of the cylinder away from the air inlet are respectively formed inside the first housing and the second housing. The two are located on the side of the first avoidance through groove close to the air inlet. A pair of first abutting blocks and a pair of second abutting blocks are respectively formed inside the first housing and the second housing close to the air inlet end. The pair of first abutting blocks and the pair of second abutting blocks can abut against the other end of the cylinder in the vertical direction.

[0018] Furthermore, an annular wind shield is fixedly arranged on both sides of the drive disk where the second external gear ring is located. Two first rubber sealing rings respectively fitting with the outer walls of the two annular wind shields are embedded on the inner wall of the air outlet pipe. The second avoidance through groove is located between the two annular wind shields.

[0019] Furthermore, two second rubber sealing rings which are symmetrically arranged and respectively fitting with the outer wall of the vortex fan are embedded on the inner wall of the end of the cylinder away from the air inlet. A static sealing ring fitting with the inner walls of the first semi-circular baffle and the second semi-circular baffle is embedded on the outer wall of the end of the cylinder away from the air inlet. A sealing strip is arranged on both sides where the first housing and the second housing are fitted.

[0020] Furthermore, the denitrification bin is a closed structure. An exhaust port, a water drain port and a water injection port are respectively formed on the top, bottom and side wall of the denitrification bin. A horizontal aeration disk is fixedly arranged at the bottom inside the denitrification bin. An air vent pipe vertically extending downward through the denitrification bin is fixedly arranged at the air inlet end of the aeration disk. An anti-leak rubber ring is sleeved on the part where the air vent pipe passes through the denitrification bin.

[0021] A using method of a treatment device for trichloroisocyanuric acid production wastewater, the using method comprising the following steps:

[0022] S1, directly discharging the wastewater generated in the production of trichloroisocyanuric acid into the regulating tank, and guiding the wastewater into the chlorine decomposition tank after passing through the regulating tank;

[0023] S2, adding hydrochloric acid into the chlorine decomposition tank to cause a chemical reaction between the trichloroisocyanuric acid in the wastewater and the hydrochloric acid, generating a large amount of chlorine gas, and collecting the chlorine gas through the air inlet pipe into the chlorine gas collection bin;

[0024] S3. Introduce the water treated with hydrochloric acid into the dechlorination tank, and add a small amount of sodium hydrogen nitrite into the dechlorination tank. Through chemical reaction, melamine urate will precipitate. After the reaction ends and the melamine urate precipitates, pump away the water after the reaction, and introduce it into the denitrification tank through the water injection port. The precipitated melamine urate is taken away and collected.

[0025] S4. When the chlorine in the chlorine collection tank gradually increases, the chlorine will enter the outlet pipeline through the outlet, and the chlorine discharged from the outlet pipeline is discharged into the aeration disk through the ventilation pipeline, so that the water in the denitrification tank reacts completely with the chlorine to generate nitrogen, and is discharged from the exhaust port. The water after the reaction is introduced into the intermediate tank through the drain port.

[0026] S5. Add sodium sulfite into the intermediate tank to remove the excess hypochlorite in the water body.

[0027] S6. Introduce the water after removing the hypochlorite into the evaporation tank, collect the crude salt separated by evaporation crystallization, and discharge the distilled condensed water up to the standard.

[0028] The beneficial effects of the present invention compared with the prior art are as follows: The non-powered air-introducing component in this device can increase the efficiency of chlorine collection in a non-powered manner. First of all, the paddle fan located in the outlet pipeline can be driven by the incoming chlorine to rotate. Thus, through the linkage mechanism, the paddle fan can drive the rotation of the vortex fan, and further increase the flow rate of the chlorine introduced into the pipeline through the rotation of the vortex fan. At the same time, the chlorine in the chlorine collection tank will gradually increase, further strengthening the rotation speed of the paddle fan. The whole process does not require external drive, which is environmentally friendly and efficient. Secondly, the air pressure adjustment port in the chlorine collection tank is used to introduce inert gas to adjust the air pressure in the chlorine collection tank, so that when the chlorine in the chlorine collection tank is less, the chlorine can also be pressed into the outlet pipeline. Finally, the aeration disk installed in the denitrification tank is used to increase the contact area between chlorine and water, so that the chemical reaction between the water body and chlorine is faster and more complete. Description of the Drawings

[0029] Figure 1 is the process schematic diagram of the embodiment;

[0030] Figure 2 is the three-dimensional structure schematic diagram of the chlorine collection tank of the embodiment;

[0031] Figure 3 is Figure 2 the partial enlarged schematic diagram of the indicated A1;

[0032] Figure 4 is Figure 3 the partial enlarged schematic diagram of the indicated A2;

[0033] Figure 5 is the top view of the chlorine collection tank of the embodiment;

[0034] Figure 6 is Figure 5 A sectional view along line A-A;

[0035] Figure 7 is Figure 6 An enlarged partial view of the indicated A3;

[0036] Figure 8 is Figure 7 An enlarged partial view of the indicated A5;

[0037] Figure 9 is Figure 8 An enlarged partial view of the indicated A6;

[0038] Figure 10 is Figure 6 An enlarged partial view of the indicated A4;

[0039] Figure 11 is Figure 10 An enlarged partial view of the indicated A7;

[0040] Figure 12 is Figure 10 An enlarged partial view of the indicated A8;

[0041] Figure 13 Is the front view of the intake pipe and the outlet pipe of the embodiment;

[0042] Figure 14 is Figure 13 A sectional view along line B-B;

[0043] Figure 15 Is the exploded three-dimensional structure diagram among the intake pipe, the connecting sleeve and the first connecting pipe of the embodiment;

[0044] Figure 16 Is the exploded three-dimensional structure diagram of the intake pipe of the embodiment;

[0045] Figure 17 Is the exploded three-dimensional structure diagram of the outlet pipe and the second connecting pipe of the embodiment;

[0046] Figure 18 Is the three-dimensional structure diagram of the denitrification chamber of the embodiment;

[0047] Figure 19 Is the top view of the denitrification chamber of the embodiment;

[0048] Figure 20 is Figure 19 A sectional view along line C-C;

[0049] Figure 21 is Figure 20 An enlarged partial view of the indicated A9.

[0050] The reference numerals in the figure are: 1, regulating tank; 2, chlorine decomposition tank; 3, chlorine gas collection bin; 4, dechlorination tank; 5, sedimentation tank; 6, denitrification bin; 7, intermediate tank; 8, evaporation tank; 9, air inlet; 10, air outlet; 11, air pressure regulating port; 12, air outlet pipe; 13, check valve; 14, scroll fan; 15, paddle fan; 16, first connecting pipe; 17, connecting pipe sleeve; 18, through hole; 19, connecting pipe; 20, cylinder; 21, first housing; 22, second housing; 23, snap connector; 24, first ventilation slot; 25, second connecting pipe; 26, fixed disk; 27, second ventilation slot; 28, rotating shaft; 29, first external gear ring; 30, transmission gear; 31, first avoidance through slot; 32, transmission disk; 33, second external gear ring; 34, second avoidance through slot; 35, first semi-circular baffle; 36, second semi-circular baffle; 37, first abutting block; 38, second abutting block; 39, annular wind baffle; 40, first rubber sealing ring; 41, second rubber sealing ring; 42, static sealing ring; 43, sealing strip; 44, exhaust port; 45, water discharge port; 46, water injection port; 47, aeration disk; 48, ventilation pipe; 49, leak-proof rubber ring; 50, third ventilation slot. Detailed implementation manners

[0051] To further understand the features, technical means, specific purposes and functions achieved by the present invention, the present invention will be further described in detail below in conjunction with the drawings and specific implementation manners.

[0052] Refer to Figures 1 to 21 A treatment device for trichloroisocyanuric acid production wastewater and its usage method as shown, including a regulating tank 1, a chlorine decomposition tank 2, a chlorine gas collection bin 3, a dechlorination tank 4, a sedimentation tank 5, a denitrification bin 6, an intermediate tank 7 and an evaporation tank 8. The regulating tank 1 is connected to the chlorine decomposition tank 2, the chlorine decomposition tank 2 is connected to the dechlorination tank 4, the dechlorination tank 4 is connected to the sedimentation tank 5, the sedimentation tank 5 is connected to the denitrification bin 6, the denitrification bin 6 is connected to the intermediate tank 7, and the intermediate tank 7 is connected to the evaporation tank 8. The chlorine gas collection bin 3 is arranged beside the chlorine decomposition tank 2. Among them, the chlorine gas collection bin 3 is provided with an air inlet 9, an air outlet 10 and an air pressure regulating port 11. The air outlet 10 and the air inlet 9 are vertically distributed up and down. The air inlet 9 is provided with an air inlet pipe for leading the chlorine gas generated by the chlorine decomposition tank 2 to the chlorine gas collection bin 3. The air outlet 10 is provided with an air outlet pipe 12 for leading the chlorine gas in the chlorine gas collection bin 3 to the denitrification bin 6. The air pressure regulating port 11 is provided with a check valve 13 for discharging inert gas into the chlorine gas collection bin 3. An unpowered air guiding assembly is arranged between the air inlet pipe and the air outlet pipe 12. The unpowered air guiding assembly includes:

[0053] A scroll fan 14, arranged in the air inlet pipe, for rotating to increase the flow rate of chlorine gas;

[0054] The paddle fan 15 is disposed inside the air outlet pipe 12 and can be driven to rotate by the air pressure generated inside the chlorine collection bin 3;

[0055] The linkage mechanism is disposed between the turbofan 14 and the paddle fan 15. When the paddle fan 15 rotates, it can drive the rotation of the turbofan 14 through the linkage mechanism, increasing the flow rate of the chlorine gas introduced into the intake pipe.

[0056] Reference Figure 3 and Figure 15 As shown in the reference and, the intake pipe is in a horizontal state. The diameter of the end of the intake pipe close to the chlorine collection bin 3 is smaller than that of the other end, and the middle part of the intake pipe is in a wasp-waist shape. The turbofan 14 is in a drum shape and is coaxially connected inside the intake pipe. The intake end of the turbofan 14 is close to the large-diameter end of the intake pipe. The small-diameter end of the intake pipe is connected to the intake port 9 through a first connecting pipe 16. A connecting pipe sleeve 17 is coaxially fixed at the large-diameter end of the intake pipe. The end of the connecting pipe sleeve 17 facing the intake pipe is an open structure, and a through hole 18 is opened at the center of the other end. A connecting pipe 19 is coaxially formed inside the connecting pipe sleeve 17, and one end of the connecting pipe 19 is connected to the through hole 18 and the other end horizontally extends into the intake end of the turbofan 14.

[0057] The turbofan 14 is in a drum shape, so that when the chlorine gas passes through the turbofan 14, the turbofan 14 will not be blown to rotate by the air pressure of the chlorine gas. The chlorine gas will only flow through the gaps between the fan blades on the circumferential side of the turbofan 14 to the chlorine collection bin 3. When the turbofan 14 rotates, a negative pressure suction will be generated at the intake end of the turbofan 14, increasing the flow rate of the chlorine gas flowing into the intake pipe. At the same time, the rotation of the turbofan 14 changes the flow direction of the chlorine gas, so that the chlorine gas passing through the turbofan 14 will flow out from the gaps between the fan blades on the circumferential side of the turbofan 14 and the flow rate will be enhanced through the wasp-waist-shaped middle part of the intake pipe and finally flow into the chlorine collection bin 3. The connecting pipe sleeve 17 is used to connect an ordinary pipe sleeve to the intake pipe, and one end of the connecting pipe 19 inside the connecting pipe sleeve 17 extends into the turbofan 14, so that the chlorine gas will be directly discharged to the turbofan 14, preventing the chlorine gas from spreading in the intake pipe.

[0058] Reference Figure 3 and Figure 10 As shown in the reference and, a cylinder 20 is coaxially provided inside the intake pipe. The intake pipe is detachably divided into a first housing 21 and a second housing 22 that can abut against each other and close the circle of the cylinder 20 up and down. The first housing 21 and the second housing 22 are fixedly connected by a plurality of snap connectors 23. One end of the cylinder 20 close to the intake port 9 is a closed structure, and the other end is an open structure. A plurality of first ventilation slots 24 are opened on the side wall of the cylinder 20 and are evenly distributed along its circumferential direction. The turbofan 14 is coaxially disposed inside the cylinder 20 and is axially connected to the end of the cylinder 20 close to the intake port 9.

[0059] The intake duct is split into a first housing 21 and a second housing 22, which facilitates the installation of other parts inside the intake duct. Moreover, the first housing 21 and the second housing 22 can tightly fix the cylinder 20 against each other, enabling the fan 14 to rotate stably inside the intake duct. The first ventilation slots 24 on the side wall of the cylinder 20 are used for the chlorine gas that has passed through the fan 14 to flow out, allowing the chlorine gas to smoothly enter the chlorine collection chamber 3 through the intake duct.

[0060] Reference Figure 3 and Figure 7 As shown, the axis of the outlet duct 12 is the same as that of the intake duct. One end of the outlet duct 12 is connected to the outlet 10 through a second connecting pipe 25. A fixed disk 26 is coaxially fixed inside the outlet duct 12. The fixed disk 26 is located at the end of the outlet duct 12 away from the second connecting pipe 25. A number of second ventilation slots 27 are evenly distributed along the circumferential direction of the fixed disk 26. A rotating shaft 28 is coaxially pivotally connected at the center of the fixed disk 26. One end of the rotating shaft 28 horizontally extends towards the second connecting pipe 25. The paddle fan 15 is in the shape of a propeller and is coaxially fixed on the extending end of the rotating shaft 28.

[0061] When there is less chlorine gas in the chlorine collection chamber 3, inert gas is injected into the chlorine collection chamber 3 through the one-way valve 13 on the air pressure adjustment port 11. As a result, the air pressure in the chlorine collection chamber 3 will increase. Since chlorine gas is constantly being introduced through the intake port 9, the chlorine gas will not flow back from the intake port 9. Instead, it will only be driven by the air pressure to enter the outlet duct 12 through the outlet 10. The shape of the paddle fan 15 can be easily blown and rotated by the chlorine gas. Therefore, the chlorine gas entering the outlet duct 12 will blow the paddle fan 15 to rotate, and through the linkage mechanism, the fan 14 will be driven to rotate. The rotation of the fan 14 further enhances the flow rate of the chlorine gas entering the intake duct, thereby improving the efficiency of the chlorine collection chamber 3 in collecting chlorine gas. Among them, the second ventilation slots 27 on the fixed disk 26 are used for the chlorine gas to flow out.

[0062] Reference Figures 6 to 14 As shown, the linkage mechanism includes:

[0063] A first external gear ring 29, coaxially sleeved on the intake end of the fan 14;

[0064] A transmission gear 30, pivotally connected to the top of the first housing 21. The axis of the transmission gear 30 is parallel to the axis of the first external gear ring 29 and meshes with the first external gear ring 29. A first avoidance through slot 31 is provided at the top of the first housing 21 for the transmission gear 30 to pass through and mesh with the first external gear ring 29;

[0065] A transmission disk 32, located inside the outlet duct 12 and coaxially fixed on the rotating shaft 28. A number of third ventilation slots 50 are evenly distributed along the circumferential direction of the transmission disk 32;

[0066] The second external gear ring 33 is coaxially sleeved on the peripheral wall of the transmission disk 32. The second external gear ring 33 meshes with the transmission gear 30. A second avoidance through groove 34 for the transmission gear 30 to pass through and mesh with the second external gear ring 33 is formed at the bottom of the air outlet pipeline 12.

[0067] When the paddle fan 15 is driven to rotate by chlorine gas, the paddle fan 15 will drive the rotating shaft 28 to rotate. At the same time, the transmission disk 32 will drive the rotation of the second external gear ring 33. Thus, through the action of the transmission gear 30, the first external gear ring 29 will be driven to drive the rotation of the turbofan 14. Therefore, through the linkage mechanism, the paddle fan 15 can drive the rotation of the turbofan 14 when rotating, and further enhance the flow rate of the chlorine gas introduced into the intake pipeline in a non-powered manner, and further enhance the collection efficiency of the chlorine gas in the chlorine gas collection bin 3.

[0068] Reference Figure 10 and Figure 16 As shown in the figure, a first semi-circular baffle 35 and a second semi-circular baffle 36 that can axially abut and combine into a circular ring at both ends of the cylinder 20 away from the air inlet 9 are respectively formed inside the first housing 21 and the second housing 22. The two are located on the side of the first avoidance through groove 31 close to the air inlet 9. A pair of first abutting blocks 37 and a pair of second abutting blocks 38 are respectively formed inside the first housing 21 and the second housing 22 close to the air inlet 9. The pair of first abutting blocks 37 and the pair of second abutting blocks 38 can axially abut the other end of the cylinder 20 towards each other.

[0069] The first semi-circular baffle 35 and the second semi-circular baffle 36 have two functions. First, the two can axially clamp and fix the cylinder 20 to play a fixing role. Second, after they are combined into a circular ring, they can prevent the chlorine gas from leaking out of the first avoidance through groove 31 after passing through the turbofan 14. At the same time, when the chlorine gas enters the turbofan 14, through the action of the connecting pipe 19, the chlorine gas directly leads to the turbofan 14 and does not pass through the first avoidance through groove 31. The first abutting blocks 37 and the second abutting blocks 38 are used to cooperate with the first semi-circular baffle 35 and the second semi-circular baffle 36, so that when the first housing 21 and the second housing 22 are axially combined into a circle, the two ends of the cylinder 20 can be stably clamped.

[0070] Reference Figure 7 、 Figure 9 and Figure 17 As shown in the figure, an annular wind baffle 39 is fixedly provided on both sides of the second external gear ring 33 on the transmission disk 32. Two first rubber sealing rings 40 respectively fitting the outer walls of the two annular wind baffles 39 are embedded on the inner wall of the air outlet pipeline 12. The second avoidance through groove 34 is located between the two annular wind baffles 39.

[0071] Since the second avoidance through groove 34 is located between two annular windshields 39, the annular windshields 39 on both sides of the transmission disk 32 can prevent chlorine gas from leaking out of the second avoidance through groove 34 when passing through the transmission disk 32. At the same time, the first rubber sealing ring 40 is used for dynamic sealing of the rotation of the two annular sealing plates, and makes the outer walls of the two annular windshields 39 in soft contact with the inner wall of the air outlet pipe 12.

[0072] On the inner wall of the end of the cylinder 20 far from the air inlet 9, two second rubber sealing rings 41 are symmetrically embedded and are both in contact with the outer wall of the vortex fan 14. On the outer wall of the end of the cylinder 20 far from the air inlet 9, a static sealing ring 42 that is in contact with the inner walls of the first semi-circular baffle 35 and the second semi-circular baffle 36 is embedded in a circle. On both sides where the first housing 21 is in contact with the second housing 22, a sealing strip 43 is provided.

[0073] The second rubber sealing ring 41 is used for dynamic sealing of the rotation of the vortex fan 14. The static sealing ring 42 is used to prevent chlorine gas from leaking out of the gap between the first semi-circular baffle 35 and the second semi-circular baffle 36 after they are combined into a ring. The sealing strip 43 is used to prevent chlorine gas from leaking out of the gap between the first housing 21 and the second housing 22 after they clamp the cylinder 20 towards each other.

[0074] Reference Figures 18 to 21 As shown, the nitrogen removal chamber 6 is a closed structure. An exhaust port 44, a water discharge port 45, and a water injection port 46 are respectively opened on the top, bottom, and side wall of the nitrogen removal chamber 6. Inside the nitrogen removal chamber 6, a horizontal aeration disk 47 is fixedly provided at the bottom. On the air inlet end of the aeration disk 47, a ventilation pipe 48 that vertically penetrates downward through the nitrogen removal chamber 6 is fixedly provided. A leak-proof rubber ring 49 is sleeved on the part where the ventilation pipe 48 penetrates through the nitrogen removal chamber 6.

[0075] First, the chlorine gas flowing out of the air outlet pipe 12 will be introduced into the ventilation pipe 48 through an ordinary pipe. A transfer pump is added to the ordinary pipe connecting the ventilation pipe 48 and the air outlet pipe 12 to increase the flow rate of the chlorine gas flowing into the ventilation pipe 48. At the same time, the transfer pump can also prevent chlorine gas from entering the nitrogen removal chamber 6 before the treated wastewater is added into the nitrogen removal chamber 6, making the subsequent wastewater treatment steps impossible to achieve. The wastewater treated by the sedimentation tank 5 is led into the nitrogen removal chamber 6 through the water injection port 46. Then, the transfer pump is started to make the chlorine gas enter the aeration disk 47 through the ventilation pipe 48, and the contact area between the chlorine gas and the water body is increased through the aeration disk 47, so that the water body can react with the chlorine gas more completely and quickly. Nitrogen gas will be generated during this process and released through the exhaust port 44. The water after the reaction is led to the intermediate tank 7 through the water discharge port 45 for the next step of treatment. Among them, solenoid valves are provided on the exhaust port 44, the water discharge port, and the water injection port 46 respectively to control the discharge of nitrogen gas, the discharge of the treated water, and the introduction of the wastewater.

[0076] A method for using a treatment device for wastewater from trichloroisocyanuric acid production, the method comprising the following steps:

[0077] S1. Direct the wastewater generated in the production of trichloroisocyanuric acid into the regulation tank 1, and after passing through the regulation tank 1, introduce the wastewater into the chlorine decomposition tank 2;

[0078] The regulation tank 1, the chlorine decomposition tank 2, the chlorine gas collection bin 3, the chlorine tank 4, the sedimentation tank 5, the denitrification bin 6, the intermediate tank 7 and the evaporation tank 8 are all connected to each other through ordinary pipelines. The intake pipeline is connected to the chlorine decomposition tank 2 through an ordinary pipeline. The outlet pipeline 12 and the denitrification bin 6 are connected by a pump to drive and transport chlorine gas. Since the wastewater contains a large amount of hypochlorite ions, it is necessary to remove the hypochlorite ions in the wastewater through multiple steps and finally obtain a certain amount of salt for recycling to reduce the amount of hazardous waste.

[0079] S2. Add hydrochloric acid to the chlorine decomposition tank 2 to cause a chemical reaction between the trichloroisocyanuric acid in the wastewater and the hydrochloric acid, generating a large amount of chlorine gas, which enters the chlorine gas collection bin 3 through the intake pipeline for collection;

[0080] This process is used to remove a large amount of hypochlorite ions in the wastewater. After the wastewater is introduced into the chlorine decomposing tank 2, hydrochloric acid is added into the chlorine decomposing tank 2. A certain amount of chlorine gas will be generated during this chemical reaction process. The intake pipeline will direct the chlorine gas generated in the chlorine gas tank to the chlorine gas collection bin 3. The chlorine gas collection bin 3 is used to collect the generated chlorine gas. During this process, the drum-shaped vortex fan 14 will not be blown by the chlorine gas to rotate. The chlorine gas will flow out from the annular blades of the vortex fan 14 and flow through the intake pipeline into the chlorine gas collection bin 3. When there is less chlorine gas in the chlorine gas collection bin 3, inert gas is injected into the chlorine gas collection bin 3 through the one-way valve 13 on the air pressure adjustment port 11. As a result, the air pressure in the chlorine gas collection bin 3 will increase. Since chlorine gas is continuously introduced through the intake port 9, the chlorine gas will not flow back from the intake port 9 but will only be driven by the air pressure to enter the outlet pipeline 12 through the outlet port 10. The shape of the paddle fan 15 can be easily blown by the chlorine gas to rotate. Therefore, the chlorine gas entering the outlet pipeline 12 will blow the paddle fan 15 to rotate, and thus the rotating shaft fixed to the paddle fan will be driven to rotate. Furthermore, the transmission disc 32 will drive the second external gear ring 33 to rotate. Through the action of the transmission gear 30, finally, the first external gear ring 29 is driven to drive the entire vortex fan 14 to rotate. During this process, the paddle fan 15 is the driving fan and the vortex fan 14 is the driven fan. Although mechanical energy loss will occur when the chlorine gas passes through the vortex fan 14 and the paddle fan 15, resulting in the chlorine gas flow rate behind the paddle fan 15 being less than the flow rate in front of the vortex fan 14, however, after the vortex fan 14 is driven, it will generate a negative pressure suction force. The negative pressure suction force generated by the vortex fan 14 is used to promote the chlorine gas in the intake pipeline to flow into the chlorine gas collection bin 3. Compared with the chlorine gas flow rate in the intake pipeline flowing into the chlorine gas collection bin 3 before the vortex fan 14 is driven, the chlorine gas flow rate in the intake pipeline after the vortex fan 14 is driven will increase. That is, the amount of chlorine gas flowing into the chlorine gas collection bin 3 is increased. Thus, within the same time, compared with the chlorine gas collection bin 3 without the unpowered air induction component, the chlorine gas collection bin 3 provided with the unpowered air induction component will collect more chlorine gas, so as to improve the chlorine gas collection efficiency. Among them, a solenoid valve (not shown in the figure) is provided at the pipeline connection between the chlorine decomposing tank 2 and the dechlorination tank 4. The solenoid valve is used to prevent the chlorine gas generated in the chlorine decomposing tank 2 from leading to the dechlorination tank 4 before the vortex fan 14 rotates, thus affecting the subsequent processes and ensuring that the chlorine gas can only lead to the chlorine gas collection bin 3 for collection and subsequent treatment after being generated.

[0081] S3. Introduce the water treated by adding hydrochloric acid into the dechlorination tank 4, and add a small amount of sodium hydrogen nitrite into the dechlorination tank 4. Through a chemical reaction, melamine urate will precipitate. After the reaction ends and the melamine urate precipitates, pump away the water after the reaction and introduce it into the denitrification bin 6 through the water injection port 46. The precipitated melamine urate is taken away and collected.

[0082] This process is used to remove a small amount of hypochlorite ions and precipitate melamine urate in the wastewater for recycling. Since the water chemical treatment reaction requires a certain amount of time, the chlorine collection chamber 3 is used to hold a certain volume of chlorine to prevent the chlorine from entering the denitrification chamber 6 before the water has entered the denitrification chamber 6, which may ultimately lead to incomplete reactions.

[0083] S4. After the chlorine in the chlorine collection chamber 3 gradually increases, the chlorine will enter the outlet pipe 12 through the outlet 10. The chlorine discharged from the outlet pipe 12 is discharged into the aeration disk 47 through the ventilation pipe 48, so that the water in the denitrification chamber 6 reacts completely with the chlorine to generate nitrogen, which is then discharged from the exhaust port 44. The water after the reaction is introduced into the intermediate tank 7 through the drain port 45.

[0084] In this process, the ammonia in the water will react with the chlorine to produce nitrogen and be discharged. The chlorine will pass through the aeration disk 47 to increase the contact area with the water, thus making the reaction faster and more complete. When the water body reacts, the generated nitrogen will be released through the exhaust port 44 on the denitrification chamber 6, and the treated water will be discharged into the intermediate tank 7 through the drain port 45 on the denitrification chamber 6 for the next step of treatment.

[0085] S5. Sodium sulfite is added to the intermediate tank 7 to remove the excess hypochlorite ions in the water body.

[0086] This process is used to remove the remaining hypochlorite ions in the wastewater for the next step of treatment.

[0087] S6. The water after removing the hypochlorite ions is introduced into the evaporation tank 8. The collected crude salt separated by evaporation and crystallization, and the distilled condensed water meets the discharge standards and is discharged.

[0088] This process is used to precipitate the crude salt in the water body after being treated through the above multiple steps and collect and utilize the crude salt. The remaining water body has reached the sewage discharge standards and is discharged.

[0089] The above embodiments only represent one or several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A treatment device for the production wastewater of trichloroisocyanuric acid, characterized in that, It includes an adjustment tank (1), a chlorine decomposition tank (2), a chlorine gas collection bin (3), a dechlorination tank (4), a sedimentation tank (5), a denitrification bin (6), an intermediate tank (7) and an evaporation tank (8). The adjustment tank (1) is connected to the chlorine decomposition tank (2), the chlorine decomposition tank (2) is connected to the dechlorination tank (4), the dechlorination tank (4) is connected to the sedimentation tank (5), the sedimentation tank (5) is connected to the denitrification bin (6), the denitrification bin (6) is connected to the intermediate tank (7), and the intermediate tank (7) is connected to the evaporation tank (8). The chlorine gas collection bin (3) is arranged beside the chlorine decomposition tank (2). Among them, the chlorine gas collection bin (3) is provided with an air inlet (9), an air outlet (10) and a pressure adjustment port (11). The air outlet (10) and the air inlet (9) are distributed vertically up and down. The air inlet (9) is provided with an air inlet pipe for leading the chlorine gas generated by the chlorine decomposition tank (2) to the chlorine gas collection bin (3). The air outlet (10) is provided with an air outlet pipe (12) for leading the chlorine gas in the chlorine gas collection bin (3) to the denitrification bin (6). The pressure adjustment port (11) is provided with a one-way valve (13) for discharging inert gas into the chlorine gas collection bin (3). There is a non-powered air induction component between the air inlet pipe and the air outlet pipe (12). The non-powered air induction component includes: a scroll fan (14), arranged in the air inlet pipe, for rotating to increase the flow rate of chlorine gas; a paddle fan (15), arranged in the air outlet pipe (12), and can be driven to rotate by the air pressure generated in the chlorine gas collection bin (3); a linkage mechanism, arranged between the scroll fan (14) and the paddle fan (15). The paddle fan (15) can drive the rotation of the scroll fan (14) when rotating itself through the linkage mechanism, so as to increase the flow rate of the chlorine gas introduced into the air inlet pipe; The air inlet pipe is in a horizontal state. The caliber of one end of the air inlet pipe close to the chlorine gas collection bin (3) is smaller than that of the other end, and the middle part of the air inlet pipe is in a wasp-waist shape. The scroll fan (14) is in a drum shape and is coaxially connected in the air inlet pipe. The air inlet end of the scroll fan (14) is close to the large-caliber end of the air inlet pipe. The small-caliber end of the air inlet pipe is connected to the air inlet (9) through a first connecting pipe (16). A connecting pipe sleeve (17) is coaxially and fixedly connected to the large-caliber end of the air inlet pipe. One end of the connecting pipe sleeve (17) facing the air inlet pipe is an open structure, and a through hole (18) is opened at the center of the other end. A connecting pipe (19) with one end communicating with the through hole (18) is coaxially formed in the connecting pipe sleeve (17). The other end of the connecting pipe (19) horizontally extends into the air inlet end of the scroll fan (14); A cylinder (20) is coaxially arranged inside the intake pipe. The intake pipe is detachably divided into a first housing (21) and a second housing (22) that can abut against the cylinder (20) from above and below to close the circle. The first housing (21) and the second housing (22) are fixedly connected by a plurality of buckle connectors (23). One end of the cylinder (20) close to the air inlet (9) is a closed structure, and the other end is an open structure. A plurality of first ventilation grooves (24) are evenly distributed on the side wall of the cylinder (20) along its circumferential direction. The shaft of the fan (14) is coaxially arranged inside the cylinder (20) and is axially connected to one end of the cylinder (20) close to the air inlet (9). The axial direction of the outlet pipe (12) is the same as that of the intake pipe. One end of the outlet pipe (12) is connected to the air outlet (10) through a second connecting pipe (25). A fixed disk (26) is coaxially fixed inside the outlet pipe (12). The fixed disk (26) is located at one end of the outlet pipe (12) far from the second connecting pipe (25). A plurality of second ventilation grooves (27) are evenly distributed on the fixed disk (26) along its circumferential direction. A rotating shaft (28) is coaxially axially connected at the center of the fixed disk (26). One end of the rotating shaft (28) extends horizontally towards the second connecting pipe (25). The paddle fan (15) is in the shape of a propeller and is coaxially fixed on the extending end of the rotating shaft (28).

2. The treatment device for the production wastewater of trichloroisocyanuric acid according to claim 1, characterized in that, The linkage mechanism includes: A first external gear ring (29), coaxially sleeved on the intake end of the fan (14); A transmission gear (30), axially connected to the top of the first housing (21). The axial direction of the transmission gear (30) is parallel to that of the first external gear ring (29) and meshes with the first external gear ring (29). A first avoidance through groove (31) is provided on the top of the first housing (21) for the transmission gear (30) to pass through and mesh with the first external gear ring (29); A transmission disk (32), located inside the outlet pipe (12) and coaxially fixed on the rotating shaft (28). A plurality of third ventilation grooves (50) are evenly distributed on the transmission disk (32) along its circumferential direction; A second external gear ring (33), coaxially sleeved on the peripheral wall of the transmission disk (32). The second external gear ring (33) meshes with the transmission gear (30). A second avoidance through groove (34) is provided at the bottom of the outlet pipe (12) for the transmission gear (30) to pass through and mesh with the second external gear ring (33).

3. The treatment device for the production wastewater of trichloroisocyanuric acid according to claim 2, characterized in that, A first semi-circular baffle (35) and a second semi-circular baffle (36) are respectively formed inside the first housing (21) and the second housing (22) that can abut against the end of the cylinder (20) far from the air inlet (9) from above and below to form a circular ring. The two are located on the side of the first avoidance through groove (31) close to the air inlet (9). A pair of first abutting blocks (37) and a pair of second abutting blocks (38) are respectively formed inside the first housing (21) and the second housing (22) close to the air inlet (9). The pair of first abutting blocks (37) and the pair of second abutting blocks (38) can abut against the other end of the cylinder (20) from above and below.

4. The treatment device for the production wastewater of trichloroisocyanuric acid according to claim 2, characterized in that, On both sides of the second outer gear ring (33) on the driving disc (32), an annular wind shield (39) is fixedly provided. Two first rubber sealing rings (40) which are respectively attached to the outer walls of the two annular wind shields (39) are embedded on the inner wall of the air outlet pipe (12). The second avoidance through groove (34) is located between the two annular wind shields (39).

5. The treatment device for the production wastewater of trichloroisocyanuric acid according to claim 3, characterized in that, On the inner wall of the end of the cylinder (20) far away from the air inlet (9), two second rubber sealing rings (41) which are symmetrically arranged and are respectively attached to the outer wall of the fan (14) are embedded. On the outer wall of the end of the cylinder (20) far away from the air inlet (9), a static sealing ring (42) which is respectively attached to the inner walls of the first semi-circular baffle (35) and the second semi-circular baffle (36) is embedded. On both sides where the first housing (21) is attached to the second housing (22), a sealing strip (43) is provided.

6. The treatment device for the production wastewater of trichloroisocyanuric acid according to claim 1, characterized in that, The denitrification tank (6) is a closed structure. An exhaust port (44), a water drain port (45) and a water injection port (46) are respectively opened on the top, bottom and side wall of the denitrification tank (6). Inside the denitrification tank (6) and at the bottom, a horizontal aeration disc (47) is fixedly provided. On the air inlet end of the aeration disc (47), a ventilation pipe (48) which vertically penetrates downward through the denitrification tank (6) is fixedly provided. A leak-proof rubber ring (49) is sleeved on the part where the ventilation pipe (48) penetrates through the denitrification tank (6).

7. A usage method of the treatment device for the production wastewater of trichloroisocyanuric acid, including the treatment device for the production wastewater of trichloroisocyanuric acid according to any one of claims 1-6, characterized in that, The using method comprises the following steps: S1, directly discharging the wastewater generated in the production of trichloroisocyanuric acid into the regulating tank (1), and guiding the wastewater into the chlorine decomposition tank (2) after passing through the regulating tank (1); S2, adding hydrochloric acid into the chlorine decomposition tank (2) to enable trichloroisocyanuric acid in the wastewater to chemically react with hydrochloric acid to generate a large amount of chlorine gas, and collecting the chlorine gas entering the chlorine gas collection bin (3) through the air inlet pipe; S3, guiding the water treated by adding hydrochloric acid into the dechlorination tank (4), adding a small amount of sodium hydrogen nitrite into the dechlorination tank (4), and through chemical reaction, melamine urate will be precipitated. After the reaction ends and the melamine urate precipitates, pumping away the water after the reaction, and guiding it into the denitrification tank (6) through the water injection port (46), and collecting the precipitated melamine urate; S4, when the chlorine gas in the chlorine gas collection bin (3) gradually increases, the chlorine gas will enter the air outlet pipe (12) through the air outlet (10), discharging the chlorine gas discharged from the air outlet pipe (12) into the aeration disc (47) through the ventilation pipe (48), enabling the water in the denitrification tank (6) to completely react with the chlorine gas to generate nitrogen gas, and discharging the nitrogen gas from the exhaust port (44), and guiding the water after the reaction into the intermediate tank (7) through the water drain port (45); S5, adding sodium sulfite into the intermediate tank (7) to remove the excess hypochlorite in the water body; S6, guiding the water after removing the hypochlorite into the evaporation tank (8), collecting the separated crude salt by evaporation crystallization, and discharging the evaporated condensed water up to the standard.

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