A high ammonia-nitrogen wastewater nitration reaction device

Abstract

The utility model relates to a kind of high ammonia nitrogen wastewater nitration reaction device, including reaction box, the support leg is fixedly connected in the bottom of reaction box, top is provided with the feed inlet with sealing cover, bottom is provided with discharge port;The gas purification assembly that is communicated with inside is provided in the side of reaction box, and multidirectional stirring assembly is installed in inside;The purification component is used to filter harmful gas generated in nitration reaction, and the stirring assembly is used to strengthen the mixing effect of wastewater and reaction reagent, and its advantage is shown in: the device is through the collaborative design of reaction box, gas purification assembly and multidirectional stirring assembly, realizes efficient nitration reaction and environmental protection treatment;Among them, multidirectional stirring assembly is through transverse and vertical stirring rod spatial distribution, forms two-way flow, shortens nitration reaction time and improves processing efficiency.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to a nitrification reaction device for high ammonia nitrogen wastewater. Background Technology

[0002] High-ammonia nitrogen wastewater refers to industrial or domestic wastewater containing large amounts of ammonia nitrogen. Excessive discharge of such wastewater can lead to eutrophication (excessive algae growth consumes dissolved oxygen, causing the death of aquatic organisms such as fish). Therefore, biological denitrification is necessary. Nitrification is a key step in the oxidation of ammonia nitrogen into nitrite and then nitrate by microorganisms under aerobic conditions.

[0003] Existing technologies, such as patent CN218371977U, while increasing the reaction rate through stirring devices, do not solve the problem of direct emission of irritating and harmful gases generated during the nitrification reaction, leading to air pollution and health risks to workers. Therefore, there is an urgent need to develop a nitrification reaction device for high-ammonia nitrogen wastewater that can effectively purify the reaction gases. Utility Model Content

[0004] The purpose of this invention is to solve the above-mentioned problems in the prior art and to provide a nitrification reaction device for high ammonia nitrogen wastewater.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A nitrification reaction device for high ammonia nitrogen wastewater includes a reaction tank, with a support leg fixedly connected to the bottom of the reaction tank, a feed inlet with a sealed cover at the top, and a discharge outlet at the bottom; a gas purification component communicating with the interior is provided on one side of the reaction tank, and a multi-directional stirring component is installed inside; the purification component is used to filter harmful gases generated by the nitrification reaction, and the stirring component is used to enhance the mixing effect of wastewater and reaction reagents.

[0007] Preferably, the purification component includes an exhaust box, a detachable filter element, and an elastic limiting structure; the side wall of the exhaust box is provided with a sealing groove that matches the shape of the filter element, and the filter element is engaged with the exhaust box through the sealing groove.

[0008] Preferably, the filter element is filled with a composite filter layer of filter cotton and activated carbon.

[0009] Preferably, the elastic limiting structure includes a fixing groove formed on the top of the filter element, a fixing rod engaged with the fixing groove, a connecting plate connecting the fixing rod, a fixing block fixed to the top of the exhaust box, and a spring installed in the fixing block; one end of the connecting plate extends into the fixing block and abuts against the spring to form an elastically reset limiting structure for fixing or releasing the filter element.

[0010] Preferably, a sealing ring is provided on the inner wall of the sealing groove.

[0011] Preferably, the stirring assembly includes a drive motor, a rotating rod connected to the output end of the motor via a coupling, a transverse stirring rod fixed to the outer surface of the rotating rod, a fixed box fixed inside the reaction chamber, a gear set installed inside the fixed box, a connecting rod connected to the gear set for transmission, and multiple vertical stirring rods fixed to the outer surface of the connecting rod; one end of the rotating rod passes through the gear set and drives its rotation.

[0012] Preferably, the gear set consists of a horizontal bevel gear and at least two vertical bevel gears meshing with each other. The rotating rod synchronously drives each vertical bevel gear to rotate through the horizontal bevel gear, thereby driving the connecting rod and the vertical stirring rod to rotate.

[0013] Due to the adoption of the above technical solution, the beneficial effects obtained by this utility model include:

[0014] 1. This utility model effectively solves the pain points of "harmful gas emission" and "low reaction efficiency" in the nitrification reaction of high ammonia nitrogen wastewater through the synergistic design of "gas purification component" and "multi-directional stirring component";

[0015] 2. This utility model adopts a composite filter layer of "filter cotton + activated carbon" to intercept particulate matter and adsorb dissolved harmful gases in sequence, thereby effectively improving the purification efficiency; together with the sealing groove sealing ring and elastic limiting structure, it can prevent the leakage of unpurified gas, significantly reducing environmental air pollution and human health risks.

[0016] 3. The cross-distribution of the horizontal and vertical stirring rods in this invention can form a "center-edge" bidirectional flow, which enhances the mixing of wastewater and reagents; compared with traditional unidirectional stirring, it can shorten the reaction time and improve the treatment efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of an embodiment of the high ammonia nitrogen wastewater nitrification reaction device of this utility model;

[0018] Figure 2 This is a front sectional view of an embodiment of the high ammonia nitrogen wastewater nitrification reaction device of this utility model;

[0019] Figure 3 This is a structural schematic diagram of an embodiment of the exhaust box and filter element of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure of an embodiment of the horizontal stirring rod and the vertical stirring rod of this utility model;

[0021] Figure 5 This is a front sectional view of another embodiment of the high ammonia nitrogen wastewater nitrification reaction device of this utility model.

[0022] The attached figures are labeled as follows:

[0023] 1. Reaction chamber;

[0024] 2. Supporting leg;

[0025] 3. Purification components; 301. Exhaust box; 302. Sealing groove; 303. Filter element; 304. Fixing groove;

[0026] 305. Fixing rod; 306. Connecting plate; 307. Fixing block; 308. Spring;

[0027] 4. Feed inlet; 5. Discharge outlet;

[0028] 6. Stirring assembly; 601. Motor; 602. Rotating rod; 603. Horizontal stirring rod;

[0029] 604. Fixed box; 605. Gear set; 606. Connecting rod; 607. Vertical stirring rod. Detailed Implementation

[0030] Please see Figure 1-4 As shown, this utility model mainly provides a nitrification reaction device for high ammonia nitrogen wastewater, including a reaction tank 1. The reaction tank 1 can be made of 304 stainless steel to ensure corrosion resistance and structural strength. Support legs 2 are fixedly connected to the bottom of the reaction tank 1, and a feed inlet 4 with a sealing cover is set at the top, and a discharge outlet 5 is set at the bottom. The support legs 2 are four square steel bars welded to the four corners of the bottom of the reaction tank. The feed inlet 4 is a flange interface with a matching sealing cover (silicone rubber material) to prevent gas leakage during the reaction. The discharge outlet 5 is also a flange interface, located at the center of the bottom of the reaction tank for easy and rapid drainage. A gas purification component 3 communicating with the interior is set on one side of the reaction tank 1. The exhaust box 301 of the purification component 3 is fixed to the top side of the reaction tank by welding to filter harmful gases generated by the nitrification reaction. A multi-directional stirring component 6 is installed inside the reaction tank 1. The motor 601 of the stirring component 6 is fixed to the center of the top of the reaction tank by bolts, and the rotating rod 602 extends vertically downward to the top of the bottom of the reaction tank to enhance the mixing effect of wastewater and reaction reagents.

[0031] In this embodiment, the purification component 3 includes an exhaust box 301, a detachable filter element 303, and an elastic limiting structure. The side wall of the exhaust box 301 has a sealing groove 302 that matches the shape of the filter element 303. The sealing groove 302 is a U-shaped groove (20mm deep, width matching the thickness of the filter element). The filter element 303 is in the shape of a rectangular drawer plate, and the internal groove is filled with a composite filter layer of filter cotton and activated carbon. Its bottom plate is provided with multiple ventilation holes for gas to pass through. The filter element 303 is horizontally inserted into the exhaust box through the sealing groove 302, perpendicular to the gas flow direction (gas passes through the filter element from bottom to top). The detachable filter element 303 can be quickly installed through the sealing groove 302, which is convenient for regular replacement. Its composite layer design of filter cotton and activated carbon can intercept particulate matter (such as microbial residues) and adsorb dissolved harmful gases (such as ammonia and hydrogen sulfide) in sequence, effectively improving the purification efficiency.

[0032] In this embodiment, the elastic limiting structure includes a fixing groove 304 formed on the top of the filter element 303, a fixing rod 305 engaged with the fixing groove 304, a connecting plate 306 connecting the fixing rod 305, a fixing block 307 fixed to the top of the exhaust box 301, and a spring 308 installed in the fixing block 307. The fixing groove 304 is a cylindrical groove formed at the center of the top of the filter element 303. The fixing rod 305 is a stainless steel cylinder with rounded corners at the bottom for easy insertion into the fixing groove. The connecting plate 306 is a stainless steel plate with one end vertically welded to the fixing rod 305 and the other end extending into the fixing block 307. The fixing block 307 is a cuboid with a spring cavity 308 inside. The spring 308 is a cylindrical helical spring with one end fixed to the bottom of the spring cavity and the other end abutting against the extended section of the connecting plate 306, forming an elastically reset limiting structure for fixing or releasing the filter element 303.

[0033] In this embodiment, the spring 308 continuously applies downward pressure to the fixing rod 305 through the connecting plate 306, ensuring that the fixing rod is tightly engaged with the fixing groove 304 and that the filter element 303 does not loosen during gas flow. In addition, the connecting plate 306 will always move downward under the action of the spring 308, thereby allowing the fixing rod 305 to extend into the fixing groove 304 and fix the filter element 303. When replacing the filter element, it is only necessary to pull the connecting plate 306 upward to compress the spring 308, so that the fixing rod 305 is disengaged from the fixing groove 304, and the filter element can be pulled out, releasing the limiting fixation of the filter element 303, which facilitates the replacement of the filter element 303.

[0034] In this embodiment, a sealing ring (not shown in the figure for simplicity) is provided on the inner wall of the sealing groove. The fixing groove 304 and the fixing rod 305 can ensure the sealed connection and stable positioning of the filter element 303 and the exhaust box 301 with the cooperation of the sealing ring.

[0035] In this embodiment, the stirring assembly 6 includes a drive motor 601, a rotating rod 602 connected to the output end of the motor 601 via a coupling, a transverse stirring rod 603 fixed to the outer surface of the rotating rod 602, a fixed box 604 fixed inside the reaction chamber 1, a gear set 605 installed inside the fixed box, a connecting rod 606 connected to the gear set 605, and multiple vertical stirring rods 607 fixed to the outer surface of the connecting rod; one end of the rotating rod 602 passes through the gear set 605 and drives it to rotate; specifically:

[0036] The drive motor is connected to the rotating rod 602 via a flexible coupling; the rotating rod 602 is a 304 stainless steel round rod with multiple transverse stirring rods 603 welded to its outer surface (evenly distributed along the axial direction of the rotating rod); the fixed box 604 is a cuboid (long, welded to the inner wall of the reaction tank 1, and filled with grease); the gear set 605 includes one transverse bevel gear and two vertical bevel gears, the transverse bevel gear is keyed to the rotating rod, and the vertical bevel gears are keyed to two connecting rods 606 respectively; the connecting rod 606 is a stainless steel round rod with multiple vertical stirring rods 607 welded to its outer surface (evenly distributed along the axial direction of the connecting rod); wherein, the motor 601 drives the transverse stirring rods 603 to rotate through the rotating rod 602 to achieve transverse mixing of wastewater; the gear set 605 converts the horizontal rotation of the rotating rod 602 into the longitudinal rotation of the connecting rod 606, driving the vertical stirring rods 607 to rotate, achieving vertical mixing of wastewater.

[0037] In this embodiment, the gear set 605 consists of a horizontal bevel gear and at least two vertical bevel gears meshing with each other. The horizontal bevel gear (driving gear) is coaxially fixed with the rotating rod 602, and the vertical bevel gears (driven gears) are symmetrically distributed on both sides of the horizontal bevel gear, with a meshing angle of 90° with the horizontal bevel gear. The rotating rod 602 drives each vertical bevel gear to rotate synchronously through the horizontal bevel gear, thereby driving the connecting rod 606 and the vertical stirring rod 607 to rotate. The bevel gear transmission realizes the steering requirement of "horizontal input - vertical output", so that the horizontal stirring and vertical stirring are carried out synchronously, thereby shortening the nitration reaction time and effectively improving the processing efficiency.

[0038] The method of using this utility model is as follows:

[0039] 1. Feed sealing: Open the feed port 4 with the sealing cover on the top of the reaction tank 1, and add the high ammonia nitrogen wastewater to be treated and the nitrification reaction agent (such as nitrifying bacteria culture medium) into the reaction tank in proportion; close the feed port sealing cover (silicone rubber material) to ensure that the inside of the reaction tank is sealed and isolated from the outside to prevent gas leakage.

[0040] 2. Start the reaction and stir: Turn on the drive motor 601. The motor drives the horizontal stirring rod 603 to rotate through the rotating rod 602. At the same time, the rotating rod drives the vertical bevel gear to rotate through the gear set 605, which drives the connecting rod 606 and the vertical stirring rod 607 to rotate synchronously. Through the spatial cross distribution of the horizontal and vertical stirring rods, a multi-directional mixed flow is formed, which enhances the contact between wastewater and reagents and promotes the nitrification reaction.

[0041] 3. Gas purification treatment: Harmful gases (such as ammonia and hydrogen sulfide) generated during the reaction process enter the purification component 3 through the connection between the reaction chamber and the exhaust box 301; the gas first passes through the vent at the bottom and then enters the filter cotton to intercept particulate matter (such as microbial residues), and then passes through the activated carbon layer to adsorb dissolved harmful gases. Finally, the purified gas is discharged to avoid environmental pollution.

[0042] 4. Discharge after reaction: After the nitration reaction is completed, open the discharge port 5 at the bottom of the reaction tank to quickly discharge the treated wastewater (containing nitrates) from the reaction tank, thus completing a single wastewater treatment process.

[0043] 5. Regular maintenance: The filter element 303 of the purification component needs to be replaced or cleaned approximately every 15 days: Pull the connecting plate 306 upward to compress the spring 308, so that the fixing rod 305 disengages from the fixing groove 304 at the top of the filter element; pull out the old filter element along the sealing groove 302, replace it with a new "filter cotton + activated carbon" composite filter element, loosen the connecting plate, the spring returns to its original position and the fixing rod re-engages into the fixing groove, completing the quick replacement of the filter element.

[0044] It should be noted that the stirring structure in this invention can be adapted to meet specific needs, such as... Figure 5 As shown: When dealing with a large-capacity nitration reaction, a rotating rod, a horizontal stirring rod, a fixed box, a gear set, a connecting rod, and a vertical stirring rod, which are designed with the internal structure of the stirring assembly, can be connected to the end of the rotating rod 602 away from the motor; and the connection method of each component of the rotating rod, the horizontal stirring rod, the fixed box, the gear set, the connecting rod, and the vertical stirring rod is the same as the connection method of the stirring assembly; thereby facilitating the acceleration of the nitration reaction and improving the reaction efficiency.

[0045] The foregoing descriptions and embodiments are provided to enable those skilled in the art to understand and apply this invention. Those skilled in the art will readily make various modifications to these contents and apply the general principles described herein to other embodiments without inventive effort. Therefore, this invention is not limited to the foregoing descriptions and embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this invention without departing from its scope should be within the protection scope of this invention.

Claims

1. A nitrification reaction device for high ammonia nitrogen wastewater, comprising a reaction tank, characterized in that: The reaction chamber is fixedly connected to a support leg at the bottom, has a feed inlet with a sealed cover at the top, and a discharge outlet at the bottom. A gas purification component communicating with the interior is provided on one side of the reaction chamber, and a multi-directional stirring component is installed inside. The purification component is used to filter harmful gases produced by the nitration reaction, and the stirring component is used to enhance the mixing effect of wastewater and reaction reagents.

2. The nitrification reaction device for high ammonia nitrogen wastewater according to claim 1, characterized in that: The purification assembly includes an exhaust box, a detachable filter element, and an elastic limiting structure; the side wall of the exhaust box has a sealing groove that matches the shape of the filter element, and the filter element is engaged with the exhaust box through the sealing groove.

3. The nitrification reaction device for high ammonia nitrogen wastewater according to claim 2, characterized in that: The filter element is filled with a composite filter layer of filter cotton and activated carbon.

4. The nitrification reaction device for high ammonia nitrogen wastewater according to claim 2, characterized in that: The elastic limiting structure includes a fixing groove on the top of the filter element, a fixing rod engaging with the fixing groove, a connecting plate connecting the fixing rod, a fixing block fixed to the top of the exhaust box, and a spring installed in the fixing block; one end of the connecting plate extends into the fixing block and abuts against the spring to form an elastically reset limiting structure for fixing or releasing the filter element.

5. The nitrification reaction device for high ammonia nitrogen wastewater according to claim 4, characterized in that: A sealing ring is provided on the inner wall of the sealing groove.

6. The nitrification reaction device for high ammonia nitrogen wastewater according to claim 1, characterized in that: The stirring assembly includes a drive motor, a rotating rod connected to the output end of the motor via a coupling, a horizontal stirring rod fixed to the outer surface of the rotating rod, a fixed box fixed inside the reaction chamber, a gear set installed inside the fixed box, a connecting rod connected to the gear set for transmission, and multiple vertical stirring rods fixed to the outer surface of the connecting rod; one end of the rotating rod passes through the gear set and drives its rotation.

7. The nitrification reaction device for high ammonia nitrogen wastewater according to claim 6, characterized in that: The gear set consists of intermeshing horizontal bevel gears and at least two vertical bevel gears. The rotating rod synchronously drives each vertical bevel gear to rotate through the horizontal bevel gears, thereby driving the connecting rod and the vertical stirring rod to rotate.

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