A treatment device for wastewater from o-phenylenediamine production

Abstract

The present invention relates to the technical field of o-phenylenediamine wastewater treatment, and discloses a treatment device for o-phenylenediamine production wastewater, including an o-phenylenediamine wastewater treatment tank, an anaerobic reactor and a calcining box, wherein the anaerobic reactor is fixedly installed on one side of the o-phenylenediamine wastewater treatment tank, the calcining box is fixedly installed on the other side of the o-phenylenediamine wastewater treatment tank, the bottom of the o-phenylenediamine wastewater treatment tank is an inclined surface, and a fixed plate is fixedly installed inside the o-phenylenediamine wastewater treatment tank. After the present invention performs micro-electrolysis on o-phenylenediamine wastewater by iron-carbon, the zero-valent iron ions of the iron-carbon generate divalent iron ions to adsorb organic pollutants in the o-phenylenediamine wastewater, thereby forming iron mud, and the iron mud is heated and chemically reacts with a strong acid to dissolve into a solution containing iron ions, and the solution is discharged into the interior of the calcining box for high-temperature calcination to obtain iron blocks, so that the iron ions in the waste can be effectively recycled.

Description

Technical Field

[0001] The invention relates to the technical field of o-phenylenediamine wastewater treatment, in particular to a treatment device for o-phenylenediamine production wastewater. Background Art

[0002] O-phenylenediamine is an important organic compound. It is a colorless monoclinic crystal at room temperature, but its color becomes darker in air and sunlight. It is used as an intermediate for dyes, pesticides, additives, photosensitive materials, etc. It is used to manufacture a variety of dyes, such as reducing dyes, etc. It is also used to manufacture polyamides, polyurethanes, leveling agents, developers, surfactants, etc.

[0003] However, a large amount of wastewater is generated after the production of o-phenylenediamine. Most of the existing o-phenylenediamine wastewater treatments are to filter and purify the organic impurities in the wastewater. However, the wastewater is subjected to micro-electrolysis with iron-carbon, so that the zero-valent iron ions in the iron-carbon are converted into divalent iron ions to adsorb the organic pollutants in the wastewater to form iron sludge. If the iron ions contained in the iron sludge are directly used for waste treatment, it will not only cause metal pollution, but also cause a large amount of iron ions to be not recycled and reused, which will also cause a waste of resources. When the o-phenylenediamine wastewater is subjected to anaerobic reactors to degrade organic matter, a large amount of biogas will be generated. The main components of the biogas are combustible gases such as methane. If they are not recovered in time and inhaled by the human body, poisoning will occur.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a treatment device for o-phenylenediamine production wastewater. After iron-carbon and o-phenylenediamine wastewater are subjected to micro-electrolysis, the zero-valent iron ions of the iron-carbon generate divalent iron ions to adsorb organic pollutants in the o-phenylenediamine wastewater, thereby forming iron mud. After the iron mud is heated, it undergoes a chemical reaction with a strong acid to dissolve into a solution containing iron ions. By discharging the solution into a calcination box and calcining it at a high temperature, iron blocks can be obtained, so that the iron ions in the waste can be effectively recycled.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions:

[0007] A treatment device for o-phenylenediamine production wastewater, comprising an o-phenylenediamine wastewater treatment tank, an anaerobic reactor and a calcining box, wherein the anaerobic reactor is fixedly installed on one side of the o-phenylenediamine wastewater treatment tank, the calcining box is fixedly installed on the other side of the o-phenylenediamine wastewater treatment tank, the bottom of the o-phenylenediamine wastewater treatment tank is an inclined surface, a fixing plate is fixedly installed inside the o-phenylenediamine wastewater treatment tank, a filter frame is fixedly installed on the top of one side of the inner wall of the anaerobic reactor, an activated carbon adsorption layer is arranged at the bottom of the filter frame, a drying layer located on the top of the activated carbon adsorption layer is arranged inside the filter frame, and the filter frame is provided with a filter frame. A first suction fan is fixedly installed on one side of the top of the anaerobic reactor, a biogas storage tank is fixedly installed on the top of the anaerobic reactor, the output end of the first suction fan is connected to the biogas storage tank, a connecting pipe is fixedly installed on the other side of the biogas storage tank, and the connecting pipe extends to the inside of the o-phenylenediamine wastewater treatment tank, a first electronic valve is fixedly installed inside the connecting pipe, and a fire nozzle is fixedly connected to the other end of the connecting pipe, a water storage cavity is opened at the bottom of the fixing plate, a protective box is fixedly installed on one side of the bottom of the fixing plate, and the fire nozzle extends to the inside of the protective box;

[0008] A support frame is movably installed inside the calcining box, and a calcining vessel is rotatably installed inside the support frame. A groove is provided on the top of the calcining vessel. A delivery pipe is connected between the other side of the o-phenylenediamine wastewater treatment tank and the top of the calcining box, and a second electronic valve is fixedly installed inside the delivery pipe. A desulfurization box and a denitrification box are slid into the openings at the front and rear ends of the bottom of the o-phenylenediamine wastewater treatment tank, and a partition is fixedly installed inside the desulfurization box and the denitrification box. A second suction fan is fixedly installed inside the desulfurization box and the denitrification box on one side close to each other, and the second suction fan is connected to the partition. Through holes are evenly opened on the top of the desulfurization box, and the through holes are located inside the o-phenylenediamine wastewater treatment tank.

[0009] Preferably, a drying chamber is provided on the inner wall of the o-phenylenediamine wastewater treatment tank, a first filter is fixedly installed on the inner wall of the drying chamber, a heat transfer pipe is fixedly connected between the drying chamber and the water storage chamber, and the heat transfer pipe is located on one side of the o-phenylenediamine wastewater treatment tank.

[0010] Preferably, a water inlet pipe is fixedly installed through the top of the o-phenylenediamine wastewater treatment tank, a discharge port is opened inside the fixed plate, a second filter screen is fixedly installed on the top of the discharge port, and a first drain pipe is fixedly installed through the bottom of the fixed plate.

[0011] Preferably, a sealing plug is movably installed inside the discharge port, the top of the sealing plug is an inclined surface, an electric telescopic rod is fixedly installed on the other side of the first drain pipe, and the output end of the electric telescopic rod is fixedly connected to the bottom of the sealing plug.

[0012] Preferably, a first sealing door is rotatably mounted at the opening on one side of the o-phenylenediamine wastewater treatment tank, a handle is fixedly mounted at the rear end of the other side of the first sealing door, and a feed port is fixedly mounted through the front end of the o-phenylenediamine wastewater treatment tank.

[0013] Preferably, the bottom of the o-phenylenediamine wastewater treatment tank is connected to a second drain pipe which is connected to the first drain pipe, a water suction pump is fixedly installed inside the anaerobic reactor, and one end of the second drain pipe is fixedly connected to the input end of the water suction pump.

[0014] Preferably, a second sealing door is rotatably installed on the other side of the calcining box, support plates are fixedly installed at the front and rear ends of the inner wall of the calcining box, the support frame is movably installed on the top of the support plate through a slide slot slider, and limit rods are rotatably installed at the front and rear ends of the top of the support frame.

[0015] Preferably, an air duct is fixedly installed through the top of the desulfurization box and the denitrification box, the air duct extends through to the inside of the water storage chamber, and the top of the air duct is U-shaped and bent downward.

[0016] Preferably, a fixing frame is fixedly installed on the rear end of the o-phenylenediamine wastewater treatment tank through the water storage chamber, a gas cylinder is fixedly installed on the rear end of the o-phenylenediamine wastewater treatment tank, and the fixing frame is connected to the bottom of the gas cylinder.

[0017] Compared with the prior art, the present invention provides a treatment device for o-phenylenediamine production wastewater, which has the following beneficial effects:

[0018] 1. The present invention allows o-phenylenediamine wastewater to undergo anaerobic reaction with an anaerobic mud bed inside an anaerobic reactor to degrade organic matter in the o-phenylenediamine wastewater. Meanwhile, the generated biogas removes impurities in the biogas through an activated carbon adsorption layer, removes water vapor in the biogas through a drying layer, and is introduced into a biogas storage tank for storage and collection through a first suction fan, thereby preventing the biogas from being accidentally inhaled by workers and causing damage in the environment. Meanwhile, the biogas can be reused as an available resource.

[0019] 2. In the present invention, after the iron-carbon and o-phenylenediamine wastewater are subjected to micro-electrolysis, the zero-valent iron ions of the iron-carbon generate divalent iron ions to adsorb the organic pollutants in the o-phenylenediamine wastewater, thereby forming iron mud. When the o-phenylenediamine wastewater after micro-electrolysis is discharged from the top of the fixed plate, the gravity sensor inside the fixed plate senses the weight reduction, and the first electronic valve automatically opens, so that the biogas is sprayed out through the flame nozzle and burned inside the protective box, heating the water inside the water storage chamber, thereby increasing the water temperature inside the water storage chamber to heat the iron mud in a water bath, and by adding strong acid to the inside of the o-phenylenediamine wastewater treatment tank, the iron mud is heated and reacts chemically with the strong acid to dissolve into a solution containing iron ions, and the solution is discharged into the inside of the calcination box for high-temperature calcination to obtain iron blocks, so that the iron ions in the waste can be effectively recycled;

[0020] 3. The present invention generates a large amount of waste gas when calcining the solution in the calcination box. The nitrogen and sulfur oxidation gas in the waste gas is discharged into the interior of the o-phenylenediamine wastewater treatment tank through the delivery pipe. The second suction fan in the desulfurization box first sucks the waste gas, and the sulfide in the waste gas reacts with limestone to generate calcium sulfate. The reacted gas flows back to the interior of the o-phenylenediamine wastewater treatment tank through the through hole. When the gas in the o-phenylenediamine wastewater treatment tank is passed into the internal reaction of the desulfurization box and is completed, the second suction fan in the denitrification box sucks the waste gas and reacts with ammonia or urea to generate nitrogen and water, thereby removing the nitride gas in the waste gas and avoiding pollution of the environment by harmful substances in the waste gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view structural schematic diagram of the present invention;

[0022] Figure 2 It is a side view structural schematic diagram of the present invention;

[0023] Figure 3 It is a rear view structural schematic diagram of the present invention;

[0024] Figure 4 It is a schematic diagram of the front cross-sectional structure of the o-phenylenediamine wastewater treatment tank of the present invention;

[0025] Figure 5 It is a schematic diagram of the side cross-sectional structure of the o-phenylenediamine wastewater treatment tank of the present invention;

[0026] Figure 6 It is a schematic diagram of the front cross-sectional structure of the anaerobic reactor of the present invention;

[0027] Figure 7 It is a schematic diagram of the cutaway structure of the calcining box of the present invention from a side view;

[0028] Figure 8 It is a schematic diagram of the top view of the desulfurization box of the present invention;

[0029] Fig. 9 It is a schematic diagram of the top cross-sectional structure of the desulfurization box of the present invention.

[0030] In the figure: 1. o-phenylenediamine wastewater treatment tank; 101. drying chamber; 102. first filter screen; 103. heat transfer pipe; 104. fixing plate; 105. second filter screen; 106. water inlet pipe; 107. first drain pipe; 108. second drain pipe; 109. discharge port; 110. sealing plug; 111. electric telescopic rod; 112. first sealing door; 113. handle; 114. feed port; 2. anaerobic reactor; 201. water suction pump; 202. filter frame; 203. activated carbon adsorption layer; 204. drying layer; 205. first suction fan ; 206, biogas storage tank; 207, connecting pipe; 208, first electronic valve; 209, combustion nozzle; 210, water storage chamber; 211, protection box; 3, calcination box; 301, second sealing door; 302, support plate; 303, support frame; 304, calcination vessel; 305, groove; 306, limit rod; 307, delivery pipe; 308, second electronic valve; 309, desulfurization box; 310, denitrification box; 311, partition; 312, second suction fan; 313, through hole; 314, air guide pipe; 315, fixing bracket; 316, gas cylinder. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] As introduced in the background technology, there are deficiencies in the prior art. In order to solve the above technical problems, the present application proposes a treatment device for o-phenylenediamine production wastewater.

[0033] See also Figure 1 - Fig. 9, a treatment device for o-phenylenediamine production wastewater, comprising an o-phenylenediamine wastewater treatment tank 1, an anaerobic reactor 2 and a calcining box 3, wherein the anaerobic reactor 2 is fixedly installed on one side of the o-phenylenediamine wastewater treatment tank 1, and the calcining box 3 is fixedly installed on the other side of the o-phenylenediamine wastewater treatment tank 1, the bottom of the o-phenylenediamine wastewater treatment tank 1 is an inclined surface, a fixing plate 104 is fixedly installed inside the o-phenylenediamine wastewater treatment tank 1, a filter frame 202 is fixedly installed on the top of one side of the inner wall of the anaerobic reactor 2, an activated carbon adsorption layer 203 is arranged at the bottom of the filter frame 202, a drying layer 204 located on the top of the activated carbon adsorption layer 203 is arranged inside the filter frame 202, and a drying layer 204 located on the top of the anaerobic reactor 2 is fixedly installed on the top of the anaerobic reactor 2. A first suction fan 205 is fixedly installed on the side, a biogas storage tank 206 is fixedly installed on the top of the anaerobic reactor 2, the output end of the first suction fan 205 is connected to the biogas storage tank 206, a connecting pipe 207 is fixedly installed on the other side of the biogas storage tank 206, and the connecting pipe 207 extends to the inside of the o-phenylenediamine wastewater treatment tank 1, a first electronic valve 208 is fixedly installed inside the connecting pipe 207, and a fire nozzle 209 is fixedly connected to the other end of the connecting pipe 207, a water storage chamber 210 is opened at the bottom of the fixed plate 104, a protective box 211 is fixedly installed on one side of the bottom of the fixed plate 104, and the fire nozzle 209 extends to the inside of the protective box 211;

[0034] A support frame 303 is movably installed inside the calcining box 3, and a calcining vessel 304 is rotatably installed inside the support frame 303. A groove 305 is provided on the top of the calcining vessel 304. A delivery pipe 307 is connected between the other side of the o-phenylenediamine wastewater treatment tank 1 and the top of the calcining box 3. A second electronic valve 308 is fixedly installed inside the delivery pipe 307. A desulfurization box 309 and a denitration box 310 are slid into the openings at the front and rear ends of the bottom of the o-phenylenediamine wastewater treatment tank 1. A partition 311 is fixedly installed inside the desulfurization box 309 and the denitration box 310. A second suction fan 312 is fixedly installed inside the side of the desulfurization box 309 and the denitration box 310 close to each other, and the second suction fan 312 is connected to the partition 311. Through holes 313 are evenly opened on the top of the desulfurization box 309, and the through holes 313 are located inside the o-phenylenediamine wastewater treatment tank 1.

[0035] Specifically, firstly, after the iron-carbon and o-phenylenediamine wastewater are subjected to micro-electrolysis, the zero-valent iron ions of the iron-carbon generate divalent iron ions to adsorb the organic pollutants in the o-phenylenediamine wastewater, thereby forming iron mud, and then the o-phenylenediamine wastewater is discharged into the anaerobic reactor 2, and an anaerobic reaction occurs with the anaerobic mud bed inside the anaerobic reactor 2 to degrade the organic matter in the o-phenylenediamine wastewater, and at the same time, the generated biogas is adsorbed and removed by the activated carbon adsorption layer 203, and the water vapor in the biogas is removed by the drying layer 204, and then the o-phenylenediamine wastewater is discharged into the anaerobic reactor 2, and the organic matter in the o-phenylenediamine wastewater is degraded. A suction fan 205 is introduced into the internal storage and collection of the biogas storage tank 206 to prevent the biogas from being dispersed in the environment and accidentally inhaled by the staff to cause damage. At the same time, the biogas can be reused as a usable resource. When the o-phenylenediamine wastewater after micro-electrolysis is discharged from the top of the fixed plate 104, the gravity sensor inside the fixed plate 104 senses the weight reduction, and the first electronic valve 208 automatically opens, so that the biogas is sprayed out through the flame nozzle 209 and burned inside the protective box 211, heating the water inside the water storage chamber 210, thereby making the water storage chamber The water temperature inside 210 is increased to heat the iron mud in a water bath. Strong acid is added to the inside of the o-phenylenediamine wastewater treatment tank 1, so that the iron mud is heated and reacts with the strong acid to dissolve into a solution containing iron ions. The solution is discharged into the inside of the calcination box 3 for high-temperature calcination to obtain iron blocks, so that the iron ions in the waste can be effectively recycled. A large amount of waste gas is generated during the calcination of the solution. The nitrogen and sulfur oxide gases in the waste gas are discharged into the inside of the o-phenylenediamine wastewater treatment tank 1 through the delivery pipe 307, and the desulfurization box 309 is used to remove the iron ions. After the second suction fan 312 in the exhaust gas first sucks in the exhaust gas, the sulfide in the exhaust gas reacts with limestone to form calcium sulfate, and the reacted gas flows back to the inside of the o-phenylenediamine wastewater treatment tank 1 through the through hole 313. When the gas inside the o-phenylenediamine wastewater treatment tank 1 passes into the internal reaction of the desulfurization box 309, the second suction fan 312 inside the denitrification box 310 sucks in the exhaust gas and reacts with ammonia or urea to form nitrogen and water, thereby removing the nitride gas in the exhaust gas to avoid harmful substances in the exhaust gas from polluting the environment.

[0036] Furthermore, a drying chamber 101 is provided on the inner wall of the o-phenylenediamine wastewater treatment tank 1, a first filter screen 102 is fixedly installed on the inner wall of the drying chamber 101, a heat transfer pipe 103 is fixedly connected between the drying chamber 101 and the water storage chamber 210, and the heat transfer pipe 103 is located on one side of the o-phenylenediamine wastewater treatment tank 1;

[0037] Specifically, after the o-phenylenediamine wastewater is filtered through the first filter screen 102, the particulate impurities contained in the wastewater are filtered and collected on the top of the first filter screen 102, and the hot air generated when the inside of the water storage chamber 210 is heated is passed into the drying chamber 101 through the heat transfer pipe 103 to dry the particulate impurities accumulated on the top of the first filter screen 102, so as to facilitate the staff to deal with the impurities later;

[0038] Furthermore, a water inlet pipe 106 is fixedly installed through the top of the o-phenylenediamine wastewater treatment tank 1, a discharge port 109 is opened inside the fixed plate 104, a second filter screen 105 is fixedly installed on the top of the discharge port 109, and a first drain pipe 107 is fixedly installed through the bottom of the fixed plate 104;

[0039] Furthermore, a sealing plug 110 is movably installed inside the discharge port 109, the top of the sealing plug 110 is an inclined surface, and an electric telescopic rod 111 is fixedly installed on the other side of the first drain pipe 107, and the output end of the electric telescopic rod 111 is fixedly connected to the bottom of the sealing plug 110;

[0040] Specifically, the o-phenylenediamine wastewater can be discharged into the interior of the o-phenylenediamine wastewater treatment tank 1 through the water inlet pipe 106 and subjected to micro-electrolysis treatment with the iron-carbon on the top of the fixed plate 104, thereby removing organic pollutants in the o-phenylenediamine wastewater. The o-phenylenediamine wastewater after micro-electrolysis can be discharged into the interior of the anaerobic reactor 2 through the first drain pipe 107. When the iron mud and the strong acid react chemically after heating and dissolve into a solution, the output end of the electric telescopic rod 111 drives the sealing plug 110 to move downward, so that the sealing plug 110 slides out from the inside of the discharge port 109. At this time, the discharge port 109 is opened, and the solution is discharged to the bottom of the o-phenylenediamine wastewater treatment tank 1 through the discharge port 109, so that the solution is conveniently discharged into the interior of the calcination box 3 through the delivery pipe 307 for calcination;

[0041] Furthermore, a first sealing door 112 is rotatably mounted at the opening of one side of the o-phenylenediamine wastewater treatment tank 1, a handle 113 is fixedly mounted at the rear end of the other side of the first sealing door 112, and a feed port 114 is fixedly mounted through the front end of the o-phenylenediamine wastewater treatment tank 1;

[0042] Specifically, the first sealing door 112 is opened by the handle 113, so that the particulate impurities on the top of the first filter screen 102 can be taken out through the opening on the other side of the o-phenylenediamine wastewater treatment tank 1 for treatment. Since the iron mud has a certain viscosity after being converted into a solution, water is added to the inside of the o-phenylenediamine wastewater treatment tank 1 through the feed port 114 to mix with the solution containing iron ions to reduce the viscosity of the solution. The bottom of the o-phenylenediamine wastewater treatment tank 1 is an inclined surface, so that the solution is more easily discharged into the inside of the calcination box 3 for calcination operation;

[0043] Furthermore, the bottom of the o-phenylenediamine wastewater treatment tank 1 is connected to a second drainage pipe 108 connected to the first drainage pipe 107, a water suction pump 201 is fixedly installed inside the anaerobic reactor 2, and one end of the second drainage pipe 108 is fixedly connected to the input end of the water suction pump 201;

[0044] Specifically, the water suction pump 201 sucks the o-phenylenediamine wastewater into the interior of the anaerobic reactor 2 through the second drain pipe 108 to undergo anaerobic reaction with the anaerobic mud bed, thereby more effectively degrading organic matter in the o-phenylenediamine wastewater (the anaerobic reaction occurs during the contact between the wastewater and the sludge particles, and the microorganisms use the organic matter in the wastewater as a substrate for metabolic activities, and the anaerobic microorganisms in the sludge begin to decompose the organic matter in the wastewater);

[0045] Furthermore, a second sealing door 301 is rotatably installed on the other side of the calcining box 3, a support plate 302 is fixedly installed at the front and rear ends of the inner wall of the calcining box 3, a support frame 303 is movably installed on the top of the support plate 302 through a slide block, and a limit rod 306 is rotatably installed at the front and rear ends of the top of the support frame 303;

[0046] Specifically, by opening the second sealing door 301, the support frame 303 slides outward on the top of the support plate 302, so that the support frame 303 can be taken out from the inside of the calcining box 3, and then the ends of the limit rods 306 close to each other are rotated to both sides, so that the groove 305 can rotate in the through groove in the middle of the support frame 303, so that the calcined molten iron in the groove 305 can be poured out for cooling and collection;

[0047] Furthermore, an air guide pipe 314 is fixedly installed through the top of the desulfurization box 309 and the denitration box 310, and the air guide pipe 314 extends through the inside of the water storage chamber 210, and the top of the air guide pipe 314 is U-shaped and bent downward;

[0048] Furthermore, a fixing frame 315 is fixedly installed at the rear end of the o-phenylenediamine wastewater treatment tank 1 through the water storage chamber 210, and a gas cylinder 316 is fixedly installed at the rear end of the o-phenylenediamine wastewater treatment tank 1, and the fixing frame 315 is connected to the bottom of the gas cylinder 316;

[0049] Specifically, when the catalyst inside the desulfurization box 309 or the denitrification box 310 is used up, and the gas is still continuously poured into the desulfurization box 309 and the denitrification box 310, the gas is introduced into the water storage chamber 210 through the air duct 314, and then the gas enters the gas cylinder 316 through the fixing frame 315. At this time, the water inside the gas cylinder 316 is compressed by the introduced gas, so that the water level inside the gas cylinder 316 is significantly reduced; during the desulfurization and denitrification reactions, it is reasonable for the water level inside the gas cylinder 316 to have a small water level change within a reasonable range. If the staff observes that the water level is reduced, it is necessary to add catalysts to the desulfurization box 309 and the denitrification box 310 for desulfurization and denitrification reactions. Since the top of the air duct 314 is U-shaped, the water inside the water storage chamber 210 is prevented from flowing back into the desulfurization box 309 and the denitrification box 310.

[0050] Working principle: o-phenylenediamine wastewater is added into the o-phenylenediamine wastewater treatment tank 1 through the water inlet pipe 106. The o-phenylenediamine wastewater is first filtered through the first filter screen 102, so that the particulate debris inside the o-phenylenediamine wastewater is filtered and accumulated on the top of the first filter screen 102 for collection. Then the o-phenylenediamine wastewater falls on the top of the fixed plate 104 and undergoes micro-electrolysis with iron-carbon (iron filings and carbon particles serve as the two poles of the primary battery, wastewater serves as the electrolyte solution, forming a complete electrochemical reaction system, and iron serves as the anode. In the iron-carbon micro-electrolysis process, the divalent iron ions generated by the anode reaction have strong reducing properties and can react with certain oxidizing substances in the o-phenylenediamine wastewater, divalent iron ions, etc. Iron ions have higher adsorption and flocculation activity, and can form stable floccules, i.e., iron sludge, with suspended matter, colloidal particles, etc. in wastewater, and are removed from wastewater by sedimentation or filtration, etc.), so that organic pollutants in o-phenylenediamine wastewater are adsorbed to form iron sludge, and then o-phenylenediamine wastewater is discharged into the interior of the second drain pipe 108 through the first drain pipe 107, and the o-phenylenediamine wastewater is sucked into the interior of the anaerobic reactor 2 by the water suction pump 201, and then anaerobically reacts with the anaerobic mud bed to degrade organic matter in the o-phenylenediamine wastewater, and the generated biogas is adsorbed and filtered by the activated carbon adsorption layer 203, and the water in the biogas is removed by the drying layer 204, and then The first suction fan 205 discharges the impurity-free biogas into the biogas storage tank 206 for collection. When the gravity sensor inside the fixed plate 104 senses that the weight has been reduced (the gravity sensor is CZL611N, which is a prior art. The connection between the gravity sensor and the controller is an existing and simple circuit control technology. The gravity sensor transmits a signal to the first electronic valve 208, which is controlled by the controller to open the first electronic valve 208. This is common knowledge for those skilled in the art and will not be described in detail here). The controller controls the first electronic valve 208 to open, so that the biogas inside the biogas storage tank 206 is discharged into the interior of the connecting pipe 207 and discharged through the burning nozzle. 209 is sprayed out and burned inside the protection box 211, heating the water inside the water storage chamber 210, so that the heated water heats the iron mud in a water bath, which is convenient and stable to control the temperature change, and avoids the chemical properties of the iron mud being unstable due to excessive heating temperature changes. Strong acid is added to the iron mud to dissolve it into a solution, and then the output end of the electric telescopic rod 111 drives the sealing plug 110 to slide out of the discharge port 109, so that the solution flows into the bottom of the o-phenylenediamine wastewater treatment tank 1 through the discharge port 109, and then the second electronic valve 308 is opened, so that the solution is discharged into the groove 305 at the top of the support frame 303 through the delivery pipe 307, and then the solution is calcined;

[0051] The waste gas generated during calcination flows back to the interior of the o-phenylenediamine wastewater treatment tank 1 through the delivery pipe 307 (the waste gas mainly contains sulfur dioxide and nitrogen oxides, etc., which are harmful gases that can cause shortness of breath, headaches, and unconsciousness after inhalation by the human body). The second suction fan 312 in the desulfurization box 309 first sucks the waste gas, and then reacts with limestone to form calcium sulfate. After the sulfide in the waste gas is removed, it returns to the interior of the o-phenylenediamine wastewater treatment tank 1 through the through hole 313. The second suction fan 312 in the denitrification box 310 sucks the desulfurized waste gas and reacts with ammonia or urea to form nitrogen and water. , thereby purifying the exhaust gas to avoid pollution to the environment. If the catalyst inside the desulfurization box 309 and the denitration box 310 is used up, the exhaust gas is continuously inhaled into the desulfurization box 309 or the denitration box 310, so that the exhaust gas is introduced into the water storage chamber 210 through the air guide pipe 314, and then the exhaust gas is discharged into the gas cylinder 316 through the fixing frame 315. Due to the pressure of the exhaust gas and the fact that the gas cylinder 316 is made of transparent glass, the water level inside the gas cylinder 316 is significantly reduced. After the staff observes that the water level has been significantly reduced, it is convenient to fill the catalyst into the desulfurization box 309 or the denitration box 310 in a timely manner.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A treatment device for o-phenylenediamine production wastewater, comprising an o-phenylenediamine wastewater treatment tank (1), an anaerobic reactor (2) and a calcination box (3), wherein the anaerobic reactor (2) is fixedly installed on one side of the o-phenylenediamine wastewater treatment tank (1), and the calcination box (3) is fixedly installed on the other side of the o-phenylenediamine wastewater treatment tank (1), characterized in that: The bottom of the o-phenylenediamine wastewater treatment tank (1) is an inclined surface. A fixed plate (104) is fixedly installed inside the o-phenylenediamine wastewater treatment tank (1). A water inlet pipe (106) is fixedly installed through the top of the o-phenylenediamine wastewater treatment tank (1). A discharge port (109) is provided inside the fixed plate (104). A second filter screen (105) is fixedly installed on the top of the discharge port (109). A first drain pipe (107) is fixedly installed through the bottom of the fixed plate (104). The o-phenylenediamine wastewater can be discharged into the o-phenylenediamine wastewater treatment tank (1) through the water inlet pipe (106) to be subjected to micro-electrolysis treatment with iron and carbon on the top of the fixed plate (104). A filter frame (202) is fixedly installed on the top of one side of the inner wall of the anaerobic reactor (2). An activated carbon adsorption layer (203) is arranged at the bottom of the filter frame (202). The filter frame (202) is provided with a filter located on the activated carbon adsorption layer ( 203) a drying layer (204) at the top, a first suction fan (205) is fixedly installed on one side of the top of the anaerobic reactor (2), a biogas storage tank (206) is fixedly installed on the top of the anaerobic reactor (2), an output end of the first suction fan (205) is connected to the biogas storage tank (206), a connecting pipe (207) is fixedly installed on the other side of the biogas storage tank (206), and the connecting pipe (207) extends to the inside of the o-phenylenediamine wastewater treatment tank (1), a first electronic valve (208) is fixedly installed inside the connecting pipe (207), and a fire nozzle (209) is fixedly connected to the other end of the connecting pipe (207), a water storage chamber (210) is opened at the bottom of the fixing plate (104), a protective box (211) is fixedly installed on one side of the bottom of the fixing plate (104), and the fire nozzle (209) extends to the inside of the protective box (211); A support frame (303) is movably installed inside the calcining box (3), a calcining vessel (304) is rotatably installed inside the support frame (303), a groove (305) is provided on the top of the calcining vessel (304), a delivery pipe (307) is connected between the other side of the o-phenylenediamine wastewater treatment tank (1) and the top of the calcining box (3), a second electronic valve (308) is fixedly installed inside the delivery pipe (307), and the openings at the front end and the rear end of the bottom of the o-phenylenediamine wastewater treatment tank (1) are slid into the installation A desulfurization box (309) and a denitration box (310) are installed, a partition (311) is fixedly installed inside the desulfurization box (309) and the denitration box (310), a second suction fan (312) is fixedly installed inside the desulfurization box (309) and the denitration box (310) on one side close to each other, the second suction fan (312) is connected to the partition (311), and through holes (313) are evenly opened on the top of the desulfurization box (309), and the through holes (313) are located inside the o-phenylenediamine wastewater treatment tank (1).

2. The treatment equipment for o-phenylenediamine production wastewater according to claim 1, characterized in that: The inner wall of the o-phenylenediamine wastewater treatment tank (1) is provided with a drying chamber (101), the inner wall of the drying chamber (101) is fixedly mounted with a first filter screen (102), a heat transfer pipe (103) is fixedly connected between the drying chamber (101) and the water storage chamber (210), and the heat transfer pipe (103) is located on one side of the o-phenylenediamine wastewater treatment tank (1).

3. The treatment equipment for o-phenylenediamine production wastewater according to claim 1, characterized in that: A sealing plug (110) is movably installed inside the discharge port (109), the top of the sealing plug (110) is an inclined surface, an electric telescopic rod (111) is fixedly installed on the other side of the first drain pipe (107), and the output end of the electric telescopic rod (111) is fixedly connected to the bottom of the sealing plug (110).

4. The treatment equipment for o-phenylenediamine production wastewater according to claim 1, characterized in that: A first sealing door (112) is rotatably mounted at an opening on one side of the o-phenylenediamine wastewater treatment tank (1), a handle (113) is fixedly mounted at the rear end of the other side of the first sealing door (112), and a feed inlet (114) is fixedly mounted through the front end of the o-phenylenediamine wastewater treatment tank (1).

5. The treatment equipment for o-phenylenediamine production wastewater according to claim 1, characterized in that: A second drainage pipe (108) which is connected to the first drainage pipe (107) is connected through the bottom of the o-phenylenediamine wastewater treatment tank (1); a water suction pump (201) is fixedly installed inside the anaerobic reactor (2); and one end of the second drainage pipe (108) is fixedly connected to the input end of the water suction pump (201).

6. The treatment equipment for o-phenylenediamine production wastewater according to claim 1, characterized in that: A second sealing door (301) is rotatably mounted on the other side of the calcining box (3); a support plate (302) is fixedly mounted on the front and rear ends of the inner wall of the calcining box (3); the support frame (303) is movably mounted on the top of the support plate (302) via a slide block; and a limit rod (306) is rotatably mounted on the front and rear ends of the top of the support frame (303).

7. The treatment equipment for o-phenylenediamine production wastewater according to claim 1, characterized in that: An air guide pipe (314) is fixedly installed through the tops of the desulfurization box (309) and the denitrification box (310), the air guide pipe (314) extends through the inside of the water storage chamber (210), and the top of the air guide pipe (314) is U-shaped and bent downwards.

8. The treatment equipment for o-phenylenediamine production wastewater according to claim 1, characterized in that: A fixing frame (315) is fixedly mounted on the rear end of the o-phenylenediamine wastewater treatment tank (1) and passes through the water storage chamber (210). A gas cylinder (316) is fixedly mounted on the rear end of the o-phenylenediamine wastewater treatment tank (1), and the fixing frame (315) is connected to the bottom of the gas cylinder (316).

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