Treatment device for cyanuric acid production wastewater

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a cyanuric acid production wastewater treatment device which comprises a homogenizing tank, an overflow port at the upper part of the homogenizing tank is communicated with an air floatation tank, a dissolved air outlet is formed in the bottom of the air floatation tank, and a slag scraper is arranged in the air floatation tank; the lower part of the air floatation tank is communicated with a first treatment tank, a first filler bracket is arranged in the first treatment tank, a urease filler is filled in the first filler bracket, the first treatment tank is communicated with a second treatment tank, a second filler bracket is arranged in the second treatment tank, a nitrifying bacteria filler is filled in the second filler bracket, and the second treatment tank is communicated with a third treatment tank; a third filler bracket is arranged in the third treatment tank, and denitrifying bacteria filler is filled in the third filler bracket; the third treatment tank is communicated with the activated carbon filter tank and the reverse osmosis processor. According to the cyanuric acid production wastewater treatment device, various wastewater treatment devices are cooperated, so that pretreatment, microbiological treatment and advanced treatment of wastewater are realized, and the problem that the treatment effect on cyanuric acid production wastewater is insufficient is solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, concretely relates to a cyanuric acid production wastewater treatment device. BACKGROUND

[0002] Cyanuric acid, also known as cyanuric acid, is often used for synthesizing cyanuric acid formaldehyde resin, and is one of raw materials of halogen trihydroxy triazine medicine. Urea pyrolysis method is generally used in cyanuric acid production, urea heated to above melting point is decomposed to produce isocyanic acid, and isocyanic acid generates cyanuric acid by trimerization. Therefore, in the production process of cyanuric acid, wastewater containing urea, isocyanic acid and other substances is formed.

[0003] At present, there is no special cyanuric acid production wastewater treatment device, and cyanuric acid production wastewater is mostly treated by organic ammonia nitrogen wastewater treatment system in actual production. Most of the existing organic ammonia nitrogen treatment systems only use single aerobic or anaerobic treatment process, for example, wastewater is introduced into activated sludge tank for aerobic treatment, and lacks pretreatment and synergistic treatment process, so that the decomposition capacity of organic matter in wastewater, especially refractory organic matter, is insufficient, and finally the chemical oxygen demand (COD) of effluent is still at a high level. In addition, the microorganisms used in the existing organic ammonia nitrogen treatment system, such as nitrifying bacteria, cannot directly decompose most of the organic matter in cyanuric acid production wastewater, which also limits the wastewater treatment effect.

[0004] Therefore, it is necessary to provide a cyanuric acid production wastewater treatment device with better organic matter degradation effect. UTILITY MODEL CONTENT

[0005] In view of the technical problems of lacking cyanuric acid production wastewater treatment device at present and insufficient organic matter treatment effect of single aerobic or anaerobic treatment process, the utility model provides a cyanuric acid production wastewater treatment device.

[0006] The technical scheme of the utility model is as follows:

[0007] A cyanuric acid production wastewater treatment device, which comprises a homogenizing tank, the homogenizing tank is provided with a flocculant inlet and a pH regulator inlet, a stirring paddle is arranged in the homogenizing tank, an overflow port is arranged at the upper part of the homogenizing tank, the overflow port is communicated with the inside of a flotation tank, a plurality of gas dissolving outlets are arranged at the bottom of the flotation tank, the gas dissolving outlets are communicated with the outlet of a gas dissolving tank arranged outside the flotation tank through pipelines, the inlet of the gas dissolving tank is communicated with the outlet of a jet flow device through a pipeline, the gas inlet of the jet flow device is communicated with the outlet of an air tank through a pipeline, the inlet of the air tank is communicated with an air compressor through a pipeline, and a reciprocating movable slag scraper is further arranged in the flotation tank.

[0008] The lower part of the flotation tank is connected to the interior of the first treatment tank through a pipe. The first treatment tank is equipped with a first packing support and is filled with urease packing. The first treatment tank is connected to the interior of the second treatment tank through a pipe. The second treatment tank is equipped with a second packing support and is filled with nitrifying bacteria packing. The second treatment tank is connected to the interior of the third treatment tank through a pipe. The third treatment tank is equipped with a third packing support and is filled with denitrifying bacteria packing.

[0009] The third treatment tank is connected to the activated carbon filter tank via a pipeline, and the activated carbon filter tank is connected to the reverse osmosis processor via a pipeline.

[0010] Furthermore, a screen is installed at the inlet of the equalization tank. The screen acts as a primary filter to prevent the presence of large floating objects in the wastewater.

[0011] Furthermore, a conical sludge trough is installed at the bottom of the homogenizing tank, with a sludge discharge port at the bottom. After flocculant is added to the wastewater, flocs gradually form, which can settle into the sludge trough. Setting the sludge trough in a conical shape makes it easier to collect the flocs.

[0012] Furthermore, the scraper includes a scraper with a connecting frame in the middle. A rotating disk is located inside the connecting frame, and the outer surface of the rotating disk contacts the inner surface of the connecting frame. The rotating disk is fixedly connected to one end of a drive shaft in an eccentric manner, and the other end of the drive shaft is connected to the output end of a drive motor. The scraper is used to scrape away small suspended solids or oily substances that float to the surface of the flotation tank.

[0013] Furthermore, an aeration device is installed at the bottom of the second treatment tank. This aeration device provides sufficient oxygen to the second treatment tank, creating an aerobic environment for nitrifying bacteria.

[0014] Furthermore, the reverse osmosis processor is also connected to the discharge pool via pipes.

[0015] The beneficial effects of this utility model are as follows:

[0016] This invention first utilizes the flocculation effect of flocculants in a homogenizing tank to remove some of the organic matter from cyanuric acid production, while simultaneously using a pH adjuster to adjust the wastewater to a slightly alkaline state. After sedimentation and stratification, the wastewater flows through an overflow outlet into a flotation tank. The buoyancy of tiny bubbles at the bottom of the flotation tank transfers small suspended solids and oily substances to the surface, where they are then removed by a scraper. Next, in the first treatment tank, urease decomposes urea and other organic matter into ammonia. Then, in the second and third treatment tanks, nitrifying and denitrifying bacteria convert the ammonia into nitrogen gas. To further ensure the wastewater treatment effect, this invention also includes an activated carbon filter to adsorb residual organic matter, color, and odor from the wastewater, as well as a reverse osmosis processor. Utilizing the principle of a semi-permeable membrane, water molecules permeate under pressure, while impurities such as salts, organic matter, and microorganisms are retained, thereby further removing dissolved substances from the wastewater.

[0017] Based on the characteristics of cyanuric acid production wastewater, this utility model adopts a combination of multiple wastewater treatment devices to achieve pretreatment, microbial treatment, and advanced treatment of wastewater. It overcomes the problem that nitrifying bacteria cannot directly decompose most organic matter in wastewater, resulting in insufficient treatment effect, which is a problem in treatment systems that directly use organic ammonia nitrogen. Attached Figure Description

[0018] To more clearly illustrate the technical solution of this utility model, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the cyanuric acid production wastewater treatment device in Example 1.

[0020] Figure 2 This is a schematic diagram of the slag scraper in Example 1.

[0021] In the diagram, 1-homogenization tank, 2-mixing paddle, 3-sludge tank, 4-sludge discharge port, 5-air flotation tank, 6-dissolved air tank, 7-jet ejector, 8-air tank, 9-air compressor, 10-sludge scraper, 11-scraper, 12-rotating disc, 13-drive shaft, 14-first treatment tank, 15-urease packing, 16-second treatment tank, 17-nitrifying bacteria packing, 18-third treatment tank, 19-denitrifying bacteria packing, 20-activated carbon filter, 21-reverse osmosis processor, 22-discharge tank. Detailed Implementation

[0022] To make the objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0023] Example 1

[0024] A treatment device for cyanuric acid production wastewater includes a homogenizing tank 1, with a screen at the inlet. The homogenizing tank 1 has a flocculant inlet and a pH adjuster inlet. An agitator 2 is installed inside the homogenizing tank 1, with its upper end fixed to the output of a first drive motor. A conical sludge trough 3 is located at the bottom of the homogenizing tank 1, with a sludge discharge port 4 at its bottom. An overflow port is located at the top of the homogenizing tank 1, communicating with the interior of a dissolved air flotation (DAF) tank 5. Multiple dissolved air outlets are located at the bottom of the DAF tank 5, and these outlets are connected via pipes to the outlet of a dissolved air tank 6 located outside the DAF tank 5. The inlet of the dissolved air tank 6 is connected via a pipe to the outlet of an ejector 7, and the gas inlet of the ejector 7 is connected via a pipe to the outlet of an air tank 8. The inlet of the air tank 8 is connected via a pipe to... The air compressor 9 is connected to the flotation tank 5, which is also equipped with a reciprocating scraper 10. The scraper 10 includes a scraper 11, with a connecting frame in the middle of the scraper 11. A rotating disk 12 is provided in the connecting frame. The outer surface of the rotating disk 12 is in contact with the inner surface of the connecting frame. The rotating disk 12 is fixedly connected to one end of the drive shaft 13 and is eccentrically connected. The other end of the drive shaft 13 is connected to the output end of the second drive motor. Multiple inverted V-shaped scrapers 11 are arranged at the bottom of the scraper 11. The cyanuric acid production wastewater is pretreated through the homogenization tank 1 and the flotation tank 5. Some organic matter is separated by sedimentation or flotation to the liquid surface by flocculant. At the same time, the pH value of the wastewater is adjusted to be slightly alkaline to provide conditions for the subsequent decomposition of nitrogen-containing organic matter by urease.

[0025] The lower part of the flotation tank 5 is connected to the interior of the first treatment tank 14 via a pipe. The first treatment tank 14 is equipped with a first packing support, which is filled with urease packing material 15 (such as a sponge filter plate impregnated with urease, diatomaceous earth adsorbed with urease, etc.). The first treatment tank 14 is connected to the interior of the second treatment tank 16 via a pipe. The second treatment tank 16 is equipped with a second packing support, which is filled with nitrifying bacteria packing material 17 (such as porous particles or bacterial sludge inoculated with nitrifying bacteria or nitrite bacteria, etc.). An aeration device is installed at the bottom of the second treatment tank 16. The second treatment tank 16 is connected to the third treatment tank 1 via a pipe. Inside the third treatment tank 18, a third packing support is provided. The third packing support is filled with denitrifying bacteria packing 19 (such as porous particles or bacterial sludge inoculated with denitrifying bacteria). The third treatment tank 18 is an anoxic (anaerobic) environment and is equipped with an openable and closable exhaust pipe. Wastewater passes through the first treatment tank 14, the second treatment tank 16 and the third treatment tank 18 in sequence and stays there. First, nitrogen-containing organic matter such as urea in the wastewater is decomposed into ammonia, and then ammonium salts are formed in the wastewater. Then, by utilizing the action of nitrifying bacteria and denitrifying bacteria, the ammonium salts in the wastewater are gradually converted into nitrogen gas, thus completing the microbial treatment of the wastewater.

[0026] The third treatment tank 18 is connected to the activated carbon filter tank 20 through a pipe. The activated carbon filter tank 20 is filled with activated carbon filter elements. The activated carbon filter tank 20 is connected to the reverse osmosis processor 21 through a pipe. The reverse osmosis processor 21 is connected to the discharge tank 22 through a pipe. The activated carbon filter tank 20 and the reverse osmosis processor 21 can achieve deep treatment of wastewater and further improve the wastewater treatment effect.

[0027] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A treatment device for cyanuric acid production wastewater, comprising a homogenization tank, characterized in that, The homogenizing tank is equipped with a flocculant inlet and a pH adjuster inlet. An agitator is installed inside the homogenizing tank. An overflow outlet is located at the top of the homogenizing tank and is connected to the interior of the dissolved air flotation tank. Multiple dissolved air outlets are located at the bottom of the dissolved air flotation tank. The dissolved air outlets are connected to the outlet of a dissolved air tank located outside the dissolved air flotation tank through pipes. The inlet of the dissolved air tank is connected to the outlet of an ejector through a pipe. The gas inlet of the ejector is connected to the outlet of an air tank through a pipe. The inlet of the air tank is connected to an air compressor through a pipe. A reciprocating scraper is also installed inside the dissolved air flotation tank. The lower part of the flotation tank is connected to the interior of the first treatment tank through a pipe. The first treatment tank is equipped with a first packing support and is filled with urease packing. The first treatment tank is connected to the interior of the second treatment tank through a pipe. The second treatment tank is equipped with a second packing support and is filled with nitrifying bacteria packing. The second treatment tank is connected to the interior of the third treatment tank through a pipe. The third treatment tank is equipped with a third packing support and is filled with denitrifying bacteria packing. The third treatment tank is connected to the activated carbon filter tank via a pipeline, and the activated carbon filter tank is connected to the reverse osmosis processor via a pipeline.

2. The cyanuric acid production wastewater treatment device as described in claim 1, characterized in that, A screen is installed at the inlet of the homogenizing tank.

3. The cyanuric acid production wastewater treatment device as described in claim 1, characterized in that, The bottom of the homogenizing tank is equipped with a conical sludge trough, and the bottom of the sludge trough is equipped with a sludge discharge port.

4. The cyanuric acid production wastewater treatment device as described in claim 1, characterized in that, The scraper includes a scraper with a connecting frame in the middle. A rotating disk is located inside the connecting frame. The outer surface of the rotating disk contacts the inner surface of the connecting frame. The rotating disk is fixedly connected to one end of the drive shaft in an eccentric connection. The other end of the drive shaft is connected to the output end of the drive motor.

5. The cyanuric acid production wastewater treatment device as described in claim 1, characterized in that, An aeration device is installed at the bottom of the second treatment tank.

6. The cyanuric acid production wastewater treatment device as described in claim 1, characterized in that, The reverse osmosis processor is also connected to the discharge pool via pipes.

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