A neutralization reaction system for treating acidic waste liquid

Abstract

The utility model discloses a kind of neutralization reaction systems of handling acidic waste liquid, including neutralization reaction kettle, neutralization liquid treatment pool, waste gas treatment device and heat exchanger, and the neutralization liquid output port pipe line of neutralization reaction kettle is connected to neutralization liquid treatment pool, and waste gas output port pipe line is connected to waste gas treatment device, and temporary storage bin is fixedly installed on the top of neutralization reaction kettle, and the top of neutralization reaction kettle is equipped with feeding port, and quantitative feeder is installed on the connecting pipe of temporary storage bin and feeding port, feeding control assembly is installed on the top of neutralization reaction kettle, and the opening of quantitative feeder is chain controlled by feeding control assembly, and coil pipe is installed on the outer wall of neutralization reaction kettle, and coil pipe pipe line is connected to heat exchanger, the utility model designs and installs quantitative feeder to solve the quantitative feeding problem of reaction material, and the utility model can effectively control the intensity of neutralization treatment reaction, so that waste liquid can be safely carried out under temperature control.

Description

Technical Field

[0001] This utility model relates to the field of hazardous waste treatment equipment technology, and more specifically, to a neutralization reaction system for treating acidic waste liquid. Background Technology

[0002] As the company's business scope expands, wastewater treatment has become a new growth area. The wastewater requiring treatment is primarily acidic, and neutralization is an essential step for handling it. The company's existing reaction equipment consists of conventional reactors. Neutralizing acidic wastewater is a relatively dangerous operation, as it generates significant heat and gas. Therefore, the amount of alkaline material fed must be carefully controlled; otherwise, the reaction could become too vigorous, leading to high heat and pressure within the reactor, posing a significant safety risk. Furthermore, the waste gas and neutralized liquid generated during the process need to be managed systematically. The company's existing conventional reactors cannot meet these requirements, resulting in a rudimentary production process with substantial safety risks. Therefore, designing and improving a neutralization reaction system capable of handling acidic wastewater is an urgent need for the company, leading to this project. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a neutralization reaction system for treating acidic waste liquid. This invention designs and installs a quantitative feeder in the neutralization reaction vessel to solve the problem of quantitative feeding of reactants, so as to control the intensity of the neutralization reaction. The design layout of this invention is reasonable, the neutralization reaction of waste liquid can be carried out safely under temperature control, and the heat of reaction can be effectively replaced and recovered. The waste gas and the treated liquid after the reaction can also be discharged and treated in an orderly manner.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A neutralization reaction system for treating acidic waste liquid includes a neutralization reactor, a neutralization liquid treatment tank, a waste gas treatment device, and a heat exchanger. The neutralization reactor has a waste liquid inlet and a waste gas outlet on its side, and a neutralization liquid outlet at its bottom. The neutralization liquid outlet is connected to the neutralization liquid treatment tank, and the waste gas outlet is connected to the waste gas treatment device. A temporary storage silo is fixedly installed on the top of the neutralization reactor, and a feeding port is located on the top of the reactor. The temporary storage silo is connected to the feeding port, and a metering device is installed on the connecting pipe between the temporary storage silo and the feeding port. A feeding control component is installed on the top of the neutralization reactor, and the metering device is interlocked and opened via the feeding control component. A coil is coiled around the outer wall of the neutralization reactor, and the coil is connected to the heat exchanger.

[0006] Furthermore, a feed plate is fixedly installed on the inner wall of the neutralization reactor. The feed plate is located directly below the feed inlet and is installed at an angle downwards.

[0007] Furthermore, the feeding control assembly includes a conduit, a piston, and an induction plate. The conduit is installed vertically and partially inserted into the neutralization reactor. The piston is movably installed inside the conduit, and its size matches the inner diameter of the conduit. A connecting rod is installed vertically on the top of the piston. The induction plate is fixedly installed on the top of the conduit. The connecting rod passes through the induction plate and is fixedly connected to a top seat. A vent hole is provided at the bottom of the conduit. The induction plate is connected to a quantitative feeder via wiring.

[0008] Furthermore, the diameter of the vent hole is smaller than the outer diameter of the piston.

[0009] Furthermore, a temperature control mechanism is installed on the neutralization reactor. The temperature control mechanism includes a temperature monitoring element and an annular tube frame. The temperature monitoring element is installed on the side wall of the neutralization reactor, and part of the temperature monitoring element is inserted into the waste liquid. The annular tube frame is fixedly installed on the inner wall of the neutralization reactor, and the annular tube frame is installed around the inner wall of the neutralization reactor. A ring-shaped main water pipe and several water spray connectors are fixedly installed on the annular tube frame. The main water pipe is connected to each water spray connector. A water supply port is provided on the outer wall of the neutralization reactor, and the water supply port is connected to the main water pipe.

[0010] Furthermore, an acid-base monitoring element is installed on the side wall of the neutralization reactor, and the acid-base monitoring element is partially inserted into the waste liquid.

[0011] Furthermore, the interior of the neutralization reactor is provided with a corrosion-resistant layer.

[0012] The beneficial effects of this utility model are:

[0013] 1. This utility model designs and installs a quantitative dispenser in the neutralization reactor. The quantitative dispenser can quantitatively dispense the reactants. The timing of the quantitative dispenser's activation is controlled according to the reaction cycle of the neutralization reaction to ensure the safety of the operation inside the reactor.

[0014] 2. This utility model is designed with a heat exchange-related structure, which can both cool the reactants and remove heat to achieve heat recovery. This utility model also adds a temperature control structure to the neutralization reactor, which can quickly cool the reactants by adding cold water when the temperature is too high, so as to ensure the safety of the operation inside the reactor. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the structural principle of a neutralization reaction system for treating acidic wastewater in this embodiment.

[0016] Figure 2 This is a schematic diagram of the internal structure of the neutralization reactor in this embodiment;

[0017] Figure 3 for Figure 2 Enlarged view of point A in the image;

[0018] Figure 4 This is an installation structure diagram of the feeding control component in this embodiment.

[0019] Figure reference numerals: 1. Neutralization reactor; 100. Corrosion-resistant layer; 11. Waste liquid inlet; 12. Temporary storage tank; 13. Feeding inlet; 131. Quantitative feeder; 14. Neutralization liquid outlet; 15. Waste gas outlet; 16. Coil; 17. Feeding plate; 18. Water supply inlet; 2. Neutralization liquid treatment tank; 3. Waste gas treatment device; 4. Heat exchanger; 5. Feeding control assembly; 51. Conduit; 511. Vent hole; 52. Piston; 53. Connecting rod; 54. Top seat; 55. Induction plate; 6. Temperature control mechanism; 61. Temperature monitoring element; 62. Annular pipe rack; 63. Main water pipe; 64. Spray water connector; 7. pH monitoring element. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figures 1-4The neutralization reaction system for treating acidic waste liquid, as shown, includes a neutralization reactor 1, a neutralization liquid treatment tank 2, a waste gas treatment device 3, and a heat exchanger 4. The neutralization reactor 1 has a waste liquid inlet 11 and a waste gas outlet 15 on its side. The waste liquid inlet 11 is used to input the acidic waste liquid to be treated. The bottom of the neutralization reactor 1 has a neutralization liquid outlet 14, which is used to output the neutralized treated liquid. The neutralization liquid outlet 14 is connected to the neutralization liquid treatment tank 2. The neutralized treated liquid is also considered waste liquid and therefore needs to be output to the neutralization liquid treatment tank 2 for further treatment. A large amount of gas is generated during the neutralization reaction, and the waste gas outlet 15 is used to output this gas. Some products contain impurities in their gas, which can cause an odor and cannot be directly discharged. Therefore, the exhaust gas outlet 15 is connected to the exhaust gas treatment device 3, and the generated gas is output to the exhaust gas treatment device 3 for further treatment. A temporary storage silo 12 is fixedly installed on the top of the neutralization reactor 1. Since the neutralization reactor 1 of this company is mainly used for the treatment of acidic waste liquid, the temporary storage silo 12 is used to store the alkaline materials required for the reaction. The top of the neutralization reactor 1 is equipped with a feeding port 13, and the temporary storage silo 12 is connected to the feeding port 13 by an outlet pipe. The alkaline materials required for the reaction are fed in through the feeding port 13. A metering device 131 is installed on the connecting pipe between the temporary storage silo 12 and the feeding port 13. The metering device 131 is used for... The existing equipment purchased from the market will not be described in detail here. The metering device 131 is electrically controlled and the opening duration can be adjusted to determine the amount of material to be fed. A feeding control component 5 is installed on the top of the neutralization reactor 1. The feeding control component 5 interlocks with the opening of the metering device 131. Each opening of the metering device 131 can add a certain amount of alkaline reactant. The feeding control component 5 controls the opening of the metering device 131 according to the reaction situation inside the reactor. The specific control principle of the feeding control component 5 will be described below. Under the control of the feeding amount, the intensity of the neutralization reaction inside the neutralization reactor 1 is controllable and there will be no safety risks. The outer wall of the neutralization reactor 1 is coiled with... Coil 16 is connected to heat exchanger 4. Cooling water flows through coil 16, which absorbs the heat generated by the neutralization reaction to achieve a cooling effect on the reaction liquid. The heated cooling water is reheated in heat exchanger 4 and becomes cold again. At the same time, the heat is recovered by heat exchanger 4 and can be applied to the waste heat utilization equipment connected later. This utility model is mainly used in the treatment of acidic waste liquid in this enterprise. It can also be used for the treatment of alkaline waste liquid. In this case, the feed material in temporary storage silo 12 can be changed to acidic material. The neutralization reaction vessel 1 of this utility model can be equipped with a stirring device to mix the acid and alkaline substances evenly and accelerate the reaction rate. The stirring device is a common component of the reaction vessel and its structure will not be described in detail here.

[0022] like Figure 2As shown, a feed plate 17 is fixedly installed on the inner wall of the neutralization reactor 1. The feed plate 17 is located directly below the feed inlet 13. The feed plate 17 guides the feed material to fall. The feed plate 17 is installed at an angle downwards. The feed material falls naturally along the feed plate 17. Under the feed operation, the feed material basically falls into the middle part of the waste liquid area, which is beneficial to the reaction.

[0023] After alkaline materials are added to acidic waste liquid, since the amount of alkaline materials added is constant, the neutralization reaction will have a cyclical process from vigorous to mild. This invention utilizes this cyclical change to design the feeding control component 5, such as... Figure 4As shown, the feeding control assembly 5 includes a conduit 51, a piston 52, and an induction plate 55. The conduit 51 is installed vertically, and part of the conduit 51 is inserted into the neutralization reactor 1. The piston 52 is movably installed inside the conduit 51, and the size of the piston 52 matches the inner diameter of the conduit 51. The piston 52 can move up and down along the conduit 51, and also prevents gas from escaping from it. A connecting rod 53 is installed vertically on the top of the piston 52. The induction plate 55 is fixedly installed on the top of the conduit 51, and the connecting rod 53 is installed through the induction plate 55. A top seat 54 is fixedly connected to the top of the connecting rod 53. The connecting rod 53 and the top seat 54 move up and down with the piston 52. The bottom of the conduit 51 has an opening. A vent 511 connects the conduit 51 to the interior of the neutralization reactor 1. The induction plate 55 is connected to the metering dispenser 131. The induction plate 55 triggers the metering dispenser 131. When alkaline material is first added to the acidic waste liquid, the amount of alkaline material is at its maximum, and the neutralization reaction is violent. At this time, the gas production is at its maximum, exceeding the gas output from the waste gas outlet 15. This causes a pressure increase within the neutralization reactor 1. Under this increased pressure, the piston 52 inside the conduit 51 rises, causing the top seat 54 to lift and detach from the induction plate 55. As the alkaline material... As the alkaline material is consumed, the neutralization reaction will slow down, and the gas production will gradually decrease. When the gas produced is less than the gas output from the waste gas outlet 15, the gas pressure inside the vessel will decrease, and the piston 52 will fall naturally under the influence of gravity (a spring can also be installed above the piston 52 to ensure its downward reset). This continues until the top seat 54 returns to contact with the induction plate 55. When the top seat 54 returns to contact with the induction plate 55, the neutralization reaction is nearing its end. This is the best time to add alkaline material again. The return to contact between the top seat 54 and the induction plate 55 creates a triggering effect, which can control the metering dispenser 131 to open. Once a fixed amount of alkaline material is added, the neutralization reaction continues to enter a cycle from vigorous to mild. Utilizing this cycle effect, the feeding control component 5 can control the metering device 131 to add material at the best time, ensuring the safety of the reaction process while also guaranteeing production continuity. The diameter of the vent 511 is smaller than the outer diameter of the piston 52, so that it does not affect ventilation and prevents the piston 52 from falling out. Of course, the first addition of alkaline material requires the main control to open the metering device 131 once. After the acidic waste liquid is treated, the metering device 131 needs to be closed by the main control.

[0024] In the treatment of acidic waste liquid, the liquid temperature needs to be controlled below 40 degrees Celsius. Although the 16-coil cooling system can achieve a cooling effect, the heat exchange and temperature control effect is relatively slow, and the liquid temperature may exceed the critical limit. Exceeding the critical limit can affect operational safety (some low-melting-point impurities may ignite). Therefore, if... Figure 2 and Figure 3As shown, this utility model also includes a temperature control mechanism 6 installed on the neutralization reactor 1. The temperature control mechanism 6 includes a temperature monitoring element 61 and an annular tube frame 62. The temperature monitoring element 61 is installed on the side wall of the neutralization reactor 1, and part of the temperature monitoring element 61 is inserted into the waste liquid. The temperature monitoring element 61 is inserted into the waste liquid with a probe to monitor the liquid temperature in real time. The annular tube frame 62 is fixedly installed on the inner wall of the neutralization reactor 1. The annular tube frame 62 is installed around the inner wall of the neutralization reactor 1. A ring-shaped main water pipe 63 and several spray nozzles are fixedly installed on the annular tube frame 62. Water connector 64, main water pipe 63 is connected to each water spray connector 64, and the outer wall of neutralization reactor 1 is provided with water supply port 18. The external water source is connected to the water supply port 18, and the water supply port 18 is connected to the main water pipe 63. In this invention, when the liquid temperature is greater than 35 degrees Celsius, cooling water is introduced into the main water pipe 63 through the water supply port 18. The cooling water is sprayed out from each circumferentially arranged water spray connector 64 to mix in the reaction liquid and quickly cool the reaction liquid. The supplemented cooling water can be normal water or cold recycled water, which reduces production costs.

[0025] like Figure 2 As shown, an acid-base monitoring element 7 is installed on the side wall of the neutralization reactor 1. Part of the acid-base monitoring element 7 is inserted into the waste liquid, and the probe of the acid-base monitoring element 7 is inserted into the waste liquid to monitor the acid-base of the waste liquid. When the acid-base of the waste liquid reaches 7 or slightly higher than 7 (slightly alkaline), it means that the acidic waste liquid has been treated and the treated liquid can be output.

[0026] like Figure 1 and Figure 3 As shown, the interior of the neutralization reactor 1 is provided with a corrosion-resistant layer 100. The corrosion-resistant layer 100 can resist corrosion and extend the service life of the neutralization reactor 1. The corrosion-resistant layer 100 can be made of Teflon material.

[0027] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A neutralization reaction system for treating an acidic waste liquid, characterized by comprising: The system includes a neutralization reactor (1), a neutralization liquid treatment tank (2), a waste gas treatment device (3), and a heat exchanger (4). The neutralization reactor (1) has a waste liquid inlet (11) and a waste gas outlet (15) on its side. The neutralization reactor (1) has a neutralization liquid outlet (14) at its bottom. The neutralization liquid outlet (14) is connected to the neutralization liquid treatment tank (2), and the waste gas outlet (15) is connected to the waste gas treatment device (3). A temporary storage tank (12) is fixedly installed on the top of the neutralization reactor (1). The neutralization reactor (1) is provided with a feeding port (13) at the top. The temporary storage tank (12) is connected to the feeding port (13) by a pipeline. A quantitative feeder (131) is installed on the pipeline connecting the temporary storage tank (12) and the feeding port (13). A feeding control component (5) is installed at the top of the neutralization reactor (1). The quantitative feeder (131) is opened by the interlocking control of the feeding control component (5). A coil (16) is installed around the outer wall of the neutralization reactor (1). The coil (16) is connected to the heat exchanger (4) by a pipeline.

2. The neutralization reaction system for treating an acidic waste liquid according to claim 1, wherein The neutralization reactor (1) is fixedly installed with a feeding plate (17) on the inner wall. The feeding plate (17) is located directly below the feeding port (13) and is installed at an angle downwards.

3. The neutralization reaction system for treating an acidic waste liquid according to claim 1, wherein The feeding control component (5) includes a conduit (51), a piston (52), and an induction plate (55). The conduit (51) is installed vertically and partially inserted into the neutralization reactor (1). The piston (52) is movably installed inside the conduit (51) and its size matches the inner diameter of the conduit (51). A connecting rod (53) is installed vertically on the top of the piston (52). The induction plate (55) is fixedly installed on the top of the conduit (51). The connecting rod (53) is installed through the induction plate (55). A top seat (54) is fixedly connected to the top of the connecting rod (53). A vent hole (511) is opened at the bottom of the conduit (51). The induction plate (55) is connected to the quantitative feeder (131).

4. The neutralization reaction system for treating an acidic waste liquid according to claim 3, wherein The diameter of the vent (511) is smaller than the outer diameter of the piston (52).

5. The neutralization reaction system for treating an acidic waste liquid according to claim 1, wherein The neutralization reactor (1) is equipped with a temperature control mechanism (6), which includes a temperature monitoring element (61) and an annular tube frame (62). The temperature monitoring element (61) is installed on the side wall of the neutralization reactor (1) and partially inserted into the waste liquid. The annular tube frame (62) is fixedly installed on the inner wall of the neutralization reactor (1) and is installed around the inner wall of the neutralization reactor (1). A ring-shaped main water pipe (63) and several water spray connectors (64) are fixedly installed on the annular tube frame (62). The main water pipe (63) is connected to each water spray connector (64). The outer wall of the neutralization reactor (1) is provided with a water supply port (18), which is connected to the main water pipe (63).

6. The neutralization reaction system for treating an acidic waste liquid according to claim 1, wherein The neutralization reactor (1) is equipped with an acid-base monitoring element (7) on its side wall, and the acid-base monitoring element (7) is partially inserted into the waste liquid.

7. The neutralization reaction system for treating an acidic waste liquid according to claim 1, wherein The neutralization reactor (1) is provided with a corrosion-resistant layer (100) inside.

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