Highly efficient and environmentally friendly dichloronitrobenzene wastewater treatment equipment

Abstract

The present application relates to the technical field of waste water treatment containing benzene, and particularly relates to a high-efficiency and environment-friendly dichloronitrobenzene waste water treatment equipment, which comprises a premixing tank, a liquid injection pump, a stirring and separating tank, a liquid collecting pump and a benzene tank, and the premixing tank, the liquid injection pump, the stirring and separating tank, the liquid collecting pump and the benzene tank are sequentially connected through pipelines, wherein the stirring and separating tank comprises a tank body, an upper liquid outlet and an inlet are arranged on the side wall of the tank body, a lower liquid outlet is arranged at the bottom of the tank body, the outlet of the liquid injection pump is connected to the inlet, the inlet of the liquid collecting pump is connected to the lower liquid outlet, and the stirring and separating tank is continuously filled with and discharged from treatment medium. The stirring and separating tank further comprises a motor, a main shaft, a blade holder and paddles, the motor is installed at the top of the tank body, the motor downwardly sets the main shaft, the blade holder is radially installed on the main shaft, a plurality of paddles are arranged on the blade holder, and the inlet is located between the upper liquid outlet and the lower liquid outlet in height.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste water treatment containing benzene, and particularly relates to a high-efficiency and environment-friendly dichloronitrobenzene waste water treatment equipment. BACKGROUND

[0002] The treatment of dichloronitrobenzene production waste water is a complex process, and the waste water contains a large amount of harmful organic matters and cannot be directly discharged, and needs to be fully degraded or separated before being discharged.

[0003] In the prior art, the physical method treatment such as the adsorption method has limited types and treatment efficiency, the chemical method such as the Fenton method and the strong reducing agent method has more processes and messy products, needs a long treatment time and treatment steps, and the biological treatment method needs a large space for the full contact between microorganisms and waste water, and at present, these methods mainly cannot further improve the treatment efficiency, and in the method involving the benzene water separation step, the benzene water separation mainly adopts the waiting method, which is time-consuming and cannot continuously improve the treatment capacity. SUMMARY

[0004] The present application aims to provide a high-efficiency and environment-friendly dichloronitrobenzene waste water treatment equipment to solve the problems in the prior art.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0006] A high-efficiency and environment-friendly dichloronitrobenzene waste water treatment equipment, the treatment equipment comprises a premixing tank, a liquid injection pump, a stirring and separating tank, a liquid collecting pump and a benzene tank, and the premixing tank, the liquid injection pump, the stirring and separating tank, the liquid collecting pump and the benzene tank are sequentially connected through pipelines, wherein the stirring and separating tank comprises a tank body, an upper liquid outlet and an inlet are arranged on the side wall of the tank body, a lower liquid outlet is arranged at the bottom of the tank body, the outlet of the liquid injection pump is connected to the inlet, and the inlet of the liquid collecting pump is connected to the lower liquid outlet,

[0007] The stirring and separating tank is continuously filled with and discharged from the treatment medium.

[0008] The organic waste water to be treated enters the premixing tank, and a treatment agent is added at the same time, the main target of the agent selected in the present application is to react with the water-combining group of the nitrobenzene to eliminate the nitrobenzene, so as to reduce the solubility of the nitrobenzene and produce stratification in the subsequent process, the stirring and separating tank is continuously filled with and discharged from the medium, so as to continuously perform the treatment and separation process and increase the treatment efficiency of the waste water in this stage.

[0009] The premixing tank is stirred after the addition of the agent, and the stirring speed in the premixing tank is more than twice the stirring speed in the stirring and separating tank.

[0010] The premixed tank is stirred at a high speed to promote the full contact and reaction between the reagent and the wastewater. Then, the premixed tank enters the stirring and separating tank. The stirring speed is reduced because the stirring and separating tank is large and the liquid clusters should flow to the target position without being attached to the inner wall. Therefore, the stirring and separating tank also needs to be stirred at a small speed to further produce the decomposition reaction after adding the reagent.

[0011] The stirring and separating tank also comprises a motor, a main shaft, a blade holder and paddles. The motor is installed on the top of the tank body. The motor is downwardly provided with the main shaft. The blade holder is radially installed on the main shaft. The blade holder is provided with a plurality of paddles.

[0012] The inlet is located between the upper liquid outlet and the lower liquid outlet in height.

[0013] The liquid to be separated entering the tank body through the inlet is located in the middle position. The upper layer is the fully floated clear liquid, and the main component is water. The lower layer is the fully sunk benzene liquid, and the main component is the reactant of dichloronitrobenzene. According to the different reagents added in front, the dichloronitrobenzene product can be different, such as nitrobenzoic acid, etc. The benzene liquid has a density greater than water, and sinks to the bottom of the tank body to be collected into the benzene tank. The middle layer enters the liquid to be separated. The water body in the upper layer in the low flow state is prevented from being disturbed to affect the clear liquid discharged from the upper liquid outlet.

[0014] The main shaft is provided with a vertical groove. The blade holder is slidingly installed on the main shaft. The blade holder and the paddles have a density between the density of the clear liquid to be separated and the density of the benzene liquid.

[0015] The blade holder and the paddles are floatingly installed as a whole. According to the buoyancy, the blade holder and the paddles are accurately stopped in the middle layer of the liquid to be stirred. The density of the lower benzene liquid is 1.4-1.6, and the density of the upper clear liquid is close to water 1.0. Therefore, the blade holder and the paddles are made of a material with a density of about 1.2 to realize floating self-adaptation on the main shaft. The vertical groove does not affect the sliding in the axial direction and retains the transmission capacity.

[0016] The paddles are movably installed on the blade holder. The blade holder has a plurality of horizontal middle rods. The paddles are rotatably installed on the middle rods. The outer edge of the paddle faces the front of the main shaft.

[0017] The paddles are also floatingly installed. When the main shaft rotates, the paddles face the medium in front. The liquid in the middle layer of the tank body has a plurality of clusters. When the paddle with a low speed enters the benzene cluster, the paddle is subjected to a large buoyancy. The front end of the paddle is lifted. During the rotation of the paddle, the force acting on the benzene cluster has a downward component, which promotes the sinking of the benzene cluster. Similarly, when the paddle encounters a water cluster, the buoyancy is small. The front end of the paddle is lowered to provide an upward force component for the cluster. The pitching change of the paddle promotes the upward and downward separation of the medium in the middle layer of the tank body. The linear speed of the paddle needs to be small to prevent the liquid from turning over the paddle due to the high speed.

[0018] Two limiting stop rods are arranged on each middle rod, and the limiting stop rods are perpendicular to the middle rod and symmetrical relative to the horizontal plane.

[0019] The limiting stop rods limit the pitch angle range of the paddle, and the pitch angle is changed in the range, so that the paddle is prevented from being lifted up and lowered down to become a vertical plane, if the paddle becomes a vertical plane, the reaction force of the paddle caused by the surrounding liquid will be increased, and the pitch change of the paddle according to the density is affected.

[0020] The included angle between the two limiting stop rods on the same middle rod is 50-60°.

[0021] The angle is limited to increase the rotation speed of the main shaft, and the angle is too small to affect the ratio of the up and down force components on different micro groups.

[0022] The stirring and separating tank body is provided with high and low liquid level meters, the densities of the two liquid level meter floats correspond to the upper clear liquid and the lower benzene liquid in the tank body, and the liquid level meters are electrically connected with the liquid injection pump and the liquid collecting pump.

[0023] Two high and low liquid level meters are arranged in the tank body to sense the stratification in the tank body, when the overall liquid level is rapidly lowered, the pumping flow of the liquid injection pump needs to be increased, when the lower benzene liquid in the tank body accumulates more, the pumping flow of the liquid collecting pump needs to be increased, and vice versa.

[0024] A float ball valve is arranged at the outlet of the upper liquid.

[0025] When the liquid level in the tank body is too high, the liquid is discharged out of the tank, and the tank body is isolated from the outside when the liquid level is low, so that the external air or liquid is prevented from entering.

[0026] Compared with the prior art, the beneficial effects of the present application are that: the wastewater after sufficient agitation by adding chemicals is continuously introduced into the stratification tank for micro agitation and stratification, the flow inlet position is at the middle part, which does not affect the stability of the upper and lower liquids, the paddle for agitation is pitched forward, different angles are adopted in different micro groups, so that the micro groups are subjected to different up and down force components, the sinking of heavy components and the floating of light components are promoted, and the separation efficiency is improved, so that the continuous treatment of wastewater is ensured, otherwise a long time needs to be spent to wait for stratification, which affects the efficiency of continuous material in and out. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall shape structure of the present application;

[0028] Figure 2 It is a schematic diagram of the internal structure of the stirring and separating tank of the present application;

[0029] Figure 3 It is a schematic diagram of the installation structure of the main shaft, blade holder and paddle of the present application;

[0030] Figure 4 yes Figure 3 View A in the middle;

[0031] Figure 5 This is a schematic diagram of the blade holder and blade operating principle of the present invention;

[0032] In the diagram: 1. Premixing tank; 2. Injection pump; 3. Stirring and diverting tank; 31. Tank body; 311. Inlet; 312. Lower layer liquid outlet; 313. Upper layer liquid outlet; 32. Motor; 33. Main shaft; 331. Vertical groove; 34. Blade holder; 341. Center rod; 342. Limiting rod; 35. Paddle; 4. Collecting pump; 5. Benzene tank. Detailed Implementation

[0033] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] A highly efficient and environmentally friendly dichloronitrobenzene wastewater treatment device includes a premixing tank 1, an injection pump 2, a stirred distribution tank 3, a collecting pump 4, and a benzene tank 5. The premixing tank 1, injection pump 2, stirred distribution tank 3, collecting pump 4, and benzene tank 5 are connected sequentially via pipelines. The stirred distribution tank 3 includes a tank body 31, with an upper liquid outlet 313 and an inlet 311 on its side wall, and a lower liquid outlet 312 at the bottom of the tank body 31. The outlet of the injection pump 2 is connected to the inlet 311, and the inlet of the collecting pump 4 is connected to the lower liquid outlet 312.

[0035] The processing medium continuously enters and exits the mixing and diversion tank 3.

[0036] like Figure 1 As shown, the organic wastewater to be treated enters the premixing tank 1, and the treatment agent is added together with it. The main objective of the agent selection in this application is to react and eliminate the water-binding groups of nitrobenzene, reduce the solubility of nitrobenzene, and subsequently produce stratification. The medium continuously enters and exits the mixing and diversion tank, so that the treatment and diversion process are continuous, thereby increasing the treatment efficiency of wastewater at this stage.

[0037] The drug is added and stirred in the premixing tank 1. The stirring speed in the premixing tank 1 is more than twice that in the stirring and diversion tank 3.

[0038] like Figure 1 , 2As shown, the premixing tank 1 is first stirred at a high speed to promote the full contact and reaction of the reagent and wastewater, and then enters the stirring and separating tank 3. The excessive stirring speed affects the liquid layering, so the stirring speed needs to be reduced. However, because the stirring and separating tank 3 is large, all liquid clusters need to flow to the target position as much as possible and not adhere to the inner wall to stay, so the stirring and separating tank 3 also needs to have a small speed stirring to further produce a decomposition reaction after adding the reagent in a spacious environment.

[0039] The stirring and separating tank 3 also includes a motor 32, a main shaft 33, a blade holder 34, and a paddle 35. The motor 32 is installed at the top of the tank body 31, the motor 32 downwardly sets the main shaft 33, the main shaft 33 radially installs the blade holder 34, and the blade holder 34 sets a plurality of paddles 35.

[0040] The inflow port 311 is located between the upper liquid outlet 313 and the lower liquid outlet 312 in height.

[0041] As shown in Figure 2 , 3 , the inflow port 311 enters the tank body 31 into the middle position of the liquid to be separated. The upper layer is the fully floated clear liquid, the main component of which is water, and the lower layer is the fully sunk benzene liquid, the main component of which is the reactant of dichloronitrobenzene. Depending on the different added reagents, the dichloronitrobenzene product can be different, such as nitrobenzoic acid, etc. The benzene liquid has a density greater than water and sinks to the bottom of the tank body 31 to be collected into the benzene tank 5. The middle layer enters the liquid to be separated, preventing the water body in the upper layer from being disturbed and affecting the clear liquid from being discharged from the upper liquid outlet 313.

[0042] The main shaft 33 is provided with a vertical groove 331, the blade holder 34 is slidingly installed on the main shaft 33, and the blade holder 34 and the paddle 35 have a density between the density of the clear liquid to be separated and the density of the benzene liquid.

[0043] As shown in Figure 2 , 3 , the blade holder 34 and the paddle 35 thereon are floatingly installed as a whole, and are accurately stopped in the middle layer of the liquid for stirring according to the buoyancy. The density of the lower benzene liquid is 1.4-1.6, and the density of the upper clear liquid is close to water 1.0. Therefore, the blade holder 34 and the paddle 35 are made of a material with a density of about 1.2 to realize floating self-adaptation on the main shaft 33. The vertical groove 331 does not affect the sliding in the axial direction and retains the transmission ability.

[0044] The paddle 35 is movably installed on the blade holder 34, the blade holder 34 has a plurality of horizontal middle rods 341, the paddle 35 is rotatably installed on the middle rod 341, and the outer edge of the paddle 35 is turned towards the front of the main shaft 33.

[0045] As shown in Figures 2-5As shown, the paddle 35 is also floatingly installed, when the main shaft 33 rotates, the paddle 35 faces the forward medium, the liquid in the middle layer of the tank 31 has some micro-groups, when the lower speed paddle 35 enters the benzene micro-group, the density is p2, the paddle 35 receives larger buoyancy, the front end of the paddle 35 is lifted up, the paddle 35 has a downward component of force on the benzene micro-group in the rotating process, which promotes the sinking of the benzene micro-group, and similarly, when the paddle 35 encounters a water micro-group, the density is p1, the buoyancy is smaller, the front end of the paddle 35 is lowered, which provides an upward force component for the micro-group, the pitching change of the paddle 35 promotes the up-and-down stratification of the medium in the middle layer of the tank 31. The linear speed of the paddle 35 needs to be small to prevent the liquid from overturning the paddle 35 at high speed.

[0046] Two limiting stop rods 342 are further arranged on each middle rod 341, and the limiting stop rods 342 are perpendicular to the middle rod 341 and symmetrical relative to the horizontal plane.

[0047] As shown in Figure 4 , 5 , the limiting stop rod 342 limits the pitching angle range of the paddle 35, and the angle changes in the range to prevent the paddle 35 from becoming a vertical plane after being lifted up and lowered too much, if the paddle 35 becomes a vertical plane, the reaction force of the surrounding liquid on the paddle 35 will become larger, which affects the pitching change of the paddle 35 according to the density.

[0048] The included angle between the two limiting stop rods 342 on the same middle rod 341 is 50-60°.

[0049] The angle is too large to limit the increase of the rotation speed of the main shaft 33, and the angle is too small to affect the proportion of the upward and downward force components on different micro-groups.

[0050] The tank body of the stirring and separating tank 3 is provided with high and low liquid level meters, the densities of the two liquid level meter floats correspond to the upper clear liquid and the lower benzene liquid in the tank 31, and the liquid level meters are electrically connected with the liquid injection pump 2 and the liquid collecting pump 4.

[0051] As shown in Figure 1 , 2 , two high and low liquid level meters are arranged in the tank 31 to sense the stratification in the tank 31, when the overall liquid level drops rapidly, the pumping flow of the liquid injection pump 2 needs to be increased, when the lower benzene liquid in the tank 31 accumulates more, the pumping flow of the liquid collecting pump 4 needs to be increased, and vice versa.

[0052] A float ball valve is arranged at the upper liquid outlet 313.

[0053] When the liquid level in the tank 31 is too high, the liquid is discharged out of the tank, and the tank 31 is isolated from the outside when the liquid level is low, to prevent external air or liquid from entering.

[0054] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. A highly efficient and environmentally friendly dichloronitrobenzene wastewater treatment device, characterized in that: The processing device comprises a premixing tank (1), a liquid injection pump (2), a stirring and separating tank (3), a liquid collecting pump (4) and a benzene tank (5), which are sequentially connected through pipelines, wherein the stirring and separating tank (3) comprises a tank body (31), the tank body (31) is provided with an upper liquid outlet (313) and an inlet (311) on the side wall, and the tank body (31) is provided with a lower liquid outlet (312) at the bottom, the outlet of the liquid injection pump (2) is connected to the inlet (311), and the inlet of the liquid collecting pump (4) is connected to the lower liquid outlet (312), The stirring and separating tank (3) continuously enters and discharges the processing medium; The premixing tank (1) is stirred by adding medicine, and the stirring speed in the premixing tank (1) is more than one time of the stirring speed in the stirring and separating tank (3); The stirring and separating tank (3) further comprises a motor (32), a main shaft (33), a blade holder (34) and a paddle (35), the motor (32) is installed at the top of the tank body (31), the motor (32) is provided with the main shaft (33) downward, the blade holder (34) is installed on the main shaft (33) in the radial direction, and a plurality of paddles (35) are arranged on the blade holder (34), The inlet (311) is located between the upper liquid outlet (313) and the lower liquid outlet (312) in height; The main shaft (33) is provided with a vertical groove (331) on the outer surface, the blade holder (34) is slidingly installed on the main shaft (33), and the overall density of the blade holder (34) and the paddle (35) is between the density of the liquid to be separated and the density of the benzene liquid; The paddle (35) is movably installed on the blade holder (34), the blade holder (34) is provided with a plurality of horizontal middle rods (341), the paddle (35) is rotatably installed on the middle rod (341), and the outer edge of the paddle (35) is rotated towards the front of the main shaft (33); Each middle rod (341) is further provided with two limiting stop rods (342), the limiting stop rods (342) are perpendicular to the middle rod (341) and are symmetrical relative to the horizontal plane; The included angle between the two limiting stop rods (342) on the same middle rod (341) is 50-60°.

2. The high-efficiency environmentally friendly dichloronitrobenzene wastewater treatment equipment according to claim 1, characterized in that: The tank body of the stirring and separating tank (3) is provided with high and low liquid level meters, the densities of the floating bodies of the two liquid level meters correspond to the upper clear liquid and the lower benzene liquid in the tank body (31), and the liquid level meters are electrically connected with the liquid injection pump (2) and the liquid collecting pump (4).

3. The high-efficiency environmentally friendly dichloronitrobenzene wastewater treatment equipment according to claim 2, characterized in that: A floating ball valve is arranged at the upper liquid outlet (313).

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