Quick lime dephosphorization reaction device

Abstract

The quick lime dephosphorization reaction device comprises a reaction kettle, a waste water pipe and a feeding pipe are inserted into the upper end of the reaction kettle, the lower end of the reaction kettle is communicated with a water outlet pipe, a conical hopper with an upward bottom opening is arranged in the reaction kettle, and the waste water pipe and the feeding pipe are vertically inserted into the conical hopper. The vertex of the lower end of the conical hopper penetrates through the center of the bottom wall of the reaction kettle to be sealed and fixed, the lower end of the conical hopper is communicated with the slag discharge pipe, and a filter screen is arranged on the side wall of the middle section of the conical surface of the conical hopper and located in the reaction kettle. According to the quick lime dephosphorization reaction device, waste water entering the reaction kettle for dephosphorization is mainly in contact and mixed with quick lime in the conical hopper, so that most of calcium phosphate particles generated by reaction are located in the conical hopper, are precipitated at the bottom of the conical hopper and are discharged through the deslagging pipe for centralized treatment. And the wastewater penetrating through the filter screen and a small part of particles generated outside the conical hopper are discharged through the water outlet pipe, are filtered and then enter the next treatment process.

Description

Technical Field

[0001] The present application relates to a quicklime addition reaction technology for wastewater phosphorus removal, and in particular to a quicklime phosphorus removal reaction device. Background Art

[0002] A large amount of phosphorus-containing wastewater will be generated during the production process of the ethyl chloride project. The wastewater can be reused through desulfurization to produce economically valuable hydrochloric acid, but the high phosphorus content in hydrochloric acid needs to be removed in the wastewater treatment stage.

[0003] Existing phosphorus removal systems inject wastewater into a recovery kettle and then add quicklime. Quicklime is primarily composed of calcium oxide, which dissolves in water to form calcium ions and alkali. Phosphates in the wastewater react with the calcium ions produced by the quicklime, forming insoluble granular calcium phosphate that precipitates at the bottom of the wastewater.

[0004] In existing phosphorus removal devices, the calcium phosphate particles generated by the reaction are scattered at the bottom of the recovery kettle and cannot be discharged in a centralized and timely manner. This not only occupies the reaction volume of the recovery kettle, but also places a heavy burden on the filtration equipment of the next process. Utility Model Content

[0005] The present application provides a quicklime dephosphorization reaction device to solve the problem that the existing dephosphorization device cannot discharge calcium phosphate particles in a centralized and timely manner, affecting the reaction efficiency and causing a burden on the filtering equipment.

[0006] The present application provides a quicklime dephosphorization reaction device, comprising a reactor, wherein a wastewater pipe and a feeding pipe are inserted into the upper end of the reactor, and the lower end is connected to a water outlet pipe. A conical bucket with an upward bottom opening is provided in the reactor, and the wastewater pipe and the feeding pipe are vertically inserted into the conical bucket. The lower end vertex of the conical bucket passes through the center of the bottom wall of the reactor and is sealed and fixed. The lower end of the conical bucket is connected to a slag discharge pipe. The side wall of the middle section of the cone surface of the conical bucket is set as a filter screen, and the filter screen is located in the reactor.

[0007] Optionally, a spiral tube is provided around the axis in the conical bucket, and the lower end of the wastewater pipe is connected to the upper end of the spiral tube.

[0008] Optionally, a pump body is installed on the top of the reactor, and the liquid extraction pipe on the pump body is vertically inserted into the reactor and extends into the outside of the conical bucket. The reflux pipe on the pump body passes through the reactor and is inserted into the conical bucket.

[0009] Optionally, the pump body is a rotor pump, which can switch the delivery direction by changing the inlet and outlet of the water through forward and reverse rotation.

[0010] Optionally, the return pipe is connected to the waste water pipe.

[0011] Compared with the prior art, the quicklime dephosphorization reaction device provided in this application has the following beneficial effects:

[0012] Wastewater entering the reactor for phosphorus removal primarily mixes with quicklime in a conical hopper, resulting in the majority of the calcium phosphate particles being deposited within the hopper. These particles settle at the bottom of the hopper and are then discharged through a slag pipe for centralized treatment. Wastewater that passes through the filter and a small portion of particles generated outside the hopper are discharged through an outlet pipe for further filtration before entering the next treatment process. This centralized and timely discharge of calcium phosphate particles ensures the effective reaction volume of the reactor and improves reaction efficiency. Furthermore, the separate discharge of most calcium phosphate particles reduces the burden on the filtration equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0014] Figure 1 A schematic diagram of the internal structure of a quicklime dephosphorization reaction device provided in one embodiment of the present application;

[0015] Figure 2 A schematic diagram showing the connection between the reflux pipe and the wastewater pipe of a quicklime dephosphorization reaction device provided in one embodiment of the present application;

[0016] Figure 3 A top view of a quicklime dephosphorization reaction device provided in one embodiment of the present application;

[0017] Figure 4 A quicklime dephosphorization reaction device provided in one embodiment of the present application Figure 3 sectional view of .

[0018] Description of reference numerals:

[0019] Reactor 1; wastewater pipe 2; feeding pipe 3; conical bucket 4; filter screen 5; slag discharge pipe 6; spiral pipe 7; pump body 8; liquid extraction pipe 9; reflux pipe 10. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application are clearly and completely described below. Obviously, the described embodiments are part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts also fall within the scope of protection of this application.

[0021] like Figures 1-4As shown, an embodiment of the present application provides a quicklime phosphorus removal reaction device, including a reactor 1, a wastewater pipe 2 and a feeding pipe 3 are inserted into the upper end of the reactor 1, and the lower end is connected to the outlet pipe. A conical bucket 4 with an upward bottom opening is provided in the reactor 1, and the wastewater pipe 2 and the feeding pipe 3 are vertically inserted into the conical bucket 4. The lower end vertex of the conical bucket 4 passes through the center of the bottom wall of the reactor 1 and is sealed and fixed. The lower end of the conical bucket 4 is connected to the slag discharge pipe 6, and the side wall of the middle section of the cone surface of the conical bucket 4 is set as a filter 5, and the filter 5 is located in the reactor 1.

[0022] During use, quicklime is added to the conical hopper 4 at a constant rate through the feed pipe 3. Simultaneously, wastewater is introduced into the conical hopper 4 through the wastewater pipe 2. Most of the incoming wastewater mixes with the quicklime in the conical hopper 4, reacting to form insoluble calcium phosphate particles. The calcium phosphate particles settle at the bottom of the conical hopper 4, and most of the resulting calcium phosphate particles are discharged through the slag discharge pipe 6 connected to the lower end of the conical hopper 4. Some of the calcium phosphate particles generated by the reaction between the wastewater passing through the filter screen 5 and the surrounding area are discharged through the outlet pipe.

[0023] In this embodiment, wastewater entering reactor 1 for phosphorus removal primarily contacts and mixes with quicklime in conical hopper 4, resulting in the majority of calcium phosphate particles being located within the hopper 4. These particles settle at the bottom of the hopper 4 and are subsequently discharged through a slag discharge pipe 6 for centralized treatment. Wastewater passing through filter screen 5 and a small portion of particles generated outside of the hopper 4 are discharged through an outlet pipe, filtered, and then transferred to the next treatment step. This centralized and timely discharge of calcium phosphate particles ensures the effective reaction volume of the reactor and improves reaction efficiency. Furthermore, the separate discharge of the majority of calcium phosphate particles reduces the burden on the filtration equipment.

[0024] In a possible implementation, a spiral tube 7 is provided around an axis in the conical bucket 4 , and the lower end of the wastewater pipe 2 is connected to the upper end of the spiral tube 7 .

[0025] After entering reactor 1 through wastewater pipe 2, wastewater is directed by spiral pipe 7 and discharged into conical bucket 4. This spiral discharge into conical bucket 4 forms a swirling flow along the inner wall of the cone. This swirling flow creates a more effective impact and mixing effect between the wastewater and the quicklime, improving reaction efficiency. This swirling flow also facilitates the separation of calcium phosphate particles. Calcium phosphate particles, with their higher specific gravity, experience a strong centrifugal force in the swirling flow, causing them to move downward along the inner wall of conical bucket 4. Wastewater, however, experiences a smaller centrifugal force and moves upward near the center of the swirling flow.

[0026] In one possible implementation, a pump body 8 is installed on the top of the reactor 1, and the liquid extraction pipe 9 on the pump body 8 is vertically inserted into the reactor 1 and extends to the outside of the conical bucket 4. The reflux pipe 10 on the pump body 8 passes through the reactor 1 and is inserted into the conical bucket 4.

[0027] After pumping wastewater from the reactor 1 outside the conical bucket 4 through the liquid extraction pipe 9, the pump body 8 is discharged into the conical bucket 4 through the return pipe 10, allowing the wastewater inside and outside the conical bucket 4 to circulate through the filter 5 and the pump body 8. The circulating wastewater contacts and mixes with the quicklime in the conical bucket 4, which has a positive effect on improving the phosphorus removal effect and the filtration of calcium phosphate particles, allowing the calcium phosphate particles to further concentrate and settle at the bottom of the conical bucket 4 for unified discharge.

[0028] In a possible implementation, the pump body 8 is a rotor pump that can switch the delivery direction by changing the water inlet and outlet through forward and reverse rotation.

[0029] After the pump body 8 switches the conveying direction, it conveys in the reverse direction, and can extract the wastewater in the conical bucket 4 through the reflux pipe 10 and discharge it into the reactor 1 outside the conical bucket 4 through the liquid extraction pipe 9, so that the wastewater in the reactor 1 passes through the filter screen 5 on the conical bucket 4 and flows inward, which has the effect of backwashing the filter screen 5 on the conical bucket 4 and reducing the blockage of the filter screen 5.

[0030] In a possible implementation, the return pipe 10 is connected to the waste water pipe 2 .

[0031] The wastewater circulating through the reflux pipe 10 can be mixed with the wastewater entering the wastewater pipe 2 and then enter the conical bucket 4 together. The discharge volume of the mixed wastewater is increased, which has a pressurizing effect and a better reaction effect on the impact mixing of quicklime.

[0032] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some or all of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A quicklime dephosphorization reaction device, comprising a reactor (1), wherein a wastewater pipe (2) and a feed pipe (3) are inserted into the upper end of the reactor (1), and the lower end is connected to the outlet pipe, characterized in that: The reactor (1) is provided with a conical bucket (4) with an upward bottom opening. The wastewater pipe (2) and the feeding pipe (3) are vertically inserted into the conical bucket (4). The lower end vertex of the conical bucket (4) passes through the center of the bottom wall of the reactor (1) and is sealed and fixed. The lower end of the conical bucket (4) is connected to the slag discharge pipe (6). The side wall of the middle section of the conical surface of the conical bucket (4) is provided with a filter screen (5), and the filter screen (5) is located in the reactor (1).

2. The quicklime dephosphorization reaction device according to claim 1, characterized in that: A spiral tube (7) is provided around an axis in the conical bucket (4), and the lower end of the waste water pipe (2) is connected to the upper end of the spiral tube (7).

3. The quicklime dephosphorization reaction device according to claim 1, characterized in that: A pump body (8) is installed on the top of the reactor (1), and a liquid extraction pipe (9) on the pump body (8) is vertically inserted into the reactor (1) and extends to the outside of the conical bucket (4). A reflux pipe (10) on the pump body (8) passes through the reactor (1) and is inserted into the conical bucket (4).

4. The quicklime dephosphorization reaction device according to claim 3, characterized in that: The pump body (8) is a rotor pump, which can switch the delivery direction by changing the water inlet and outlet through forward and reverse rotation.

5. The quicklime dephosphorization reaction device according to claim 3 or 4, characterized in that: The return pipe (10) is connected to the waste water pipe (2).

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