Activation section wastewater recycling device

Abstract

The utility model discloses an activation section wastewater recycling device, and belongs to the technical field of wastewater treatment devices. The utility model relates to an activation section wastewater recycling device, which comprises a recycling tank, and further comprises a stirring device, an activation section and a waste water recycling device, the first connecting pipe is connected to the recycling tank, the air inlet end of the first connecting pipe is located at the top of the recycling tank, the air outlet end of the first connecting pipe is located at the bottom of the recycling tank, and the air inlet end and the air outlet end of the first connecting pipe are connected with a one-way valve and a pressure valve respectively; the second connecting pipe is arranged at the bottom of the recycling tank, and the second connecting pipe is communicated with the air inlet end of the first connecting pipe; the nozzle is connected to the air outlet end of the second connecting pipe and used for blowing air to the bottom of the recycling tank; carbon dioxide gas is continuously injected into the recovery tank, activated water and carbon dioxide are promoted to react and neutralize, then precipitation separation is carried out, waste water is treated, and the waste water is convenient to recycle and reuse.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment devices, in particular to an activation section wastewater recycling device. Background Art

[0002] During the activation process of the catalyst in the BDO hydrogenation section, activation wastewater is generated. The amount of activation wastewater discharged is large and difficult to treat. This has become a difficult problem for the BDO industry to overcome in terms of production costs and environmental protection requirements.

[0003] At present, the treatment method for the activated wastewater generated in the BDO hydrogenation section is to discharge it after neutralization. However, since the amount of activated wastewater generated in the activation process of the hydrogenation catalyst is large and the activated wastewater contains a large amount of sodium aluminate (NaAlO2) and sodium hydroxide (NaOH), direct discharge will cause high unit consumption of desalted water and pollution to the environment. Therefore, an activation section wastewater recycling device is provided to solve the above-mentioned problem that the direct discharge will cause high unit consumption of desalted water and pollution to the environment. Utility Model Content

[0004] The purpose of the utility model is to solve the problems raised in the above background technology, and to propose an activation stage wastewater recycling device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] An activation stage wastewater recycling device comprises a recovery tank and also includes:

[0007] A stirring device, rotatably connected in the recovery tank;

[0008] A connecting pipe 1 is connected to the recovery tank, the air inlet end of the connecting pipe 1 is located at the top of the recovery tank, the air outlet end of the connecting pipe 1 is located at the bottom of the recovery tank, and the air inlet end and the air outlet end of the connecting pipe 1 are respectively connected to a one-way valve and a pressure valve;

[0009] A second connecting pipe is arranged at the bottom of the recovery tank, and the second connecting pipe is communicated with the air inlet end of the first connecting pipe;

[0010] A nozzle is connected to the air outlet end of the second connecting pipe, and the nozzle is used to blow air toward the bottom of the recovery tank.

[0011] In order to facilitate the stirring of the liquid, preferably, the stirring device includes a motor, a rotating shaft, and a stirring rod. The rotating shaft is rotatably connected in the recovery tank, multiple groups of stirring rods are fixedly connected to the rotating shaft, the motor is fixedly connected to the recovery tank, and the output end of the motor is fixedly connected to the rotating shaft.

[0012] In order to facilitate subsequent use, preferably, the end of the rotating shaft away from the motor is rotatably connected to the bottom surface of the recovery tank.

[0013] In order to facilitate the contact between gas and liquid, preferably, the recovery tank is connected with an air pipe, and a plurality of groups of air outlets are provided at the bottom of the stirring rod, and the air outlets are communicated with the air pipe.

[0014] In order to facilitate the discharge of excess gas, preferably, a pressure relief valve is provided on the top of the recovery tank.

[0015] For ease of use, preferably, the recovery tank is provided with a liquid inlet and a liquid outlet, and the liquid inlet and the liquid outlet are respectively provided with a tank cover and a control valve.

[0016] Compared with the prior art, the utility model provides an activation stage wastewater recycling device, which has the following beneficial effects:

[0017] The utility model continuously injects carbon dioxide gas into the recovery tank to promote the reaction between activated water and carbon dioxide for neutralization, and then performs precipitation separation to treat the wastewater, so as to facilitate the recycling and reuse of the wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a structural schematic diagram of an activation stage wastewater recycling device proposed by the utility model;

[0019] Figure 2 This utility model proposes an activation stage wastewater recycling device Figure 1 The structural diagram of part A in the figure;

[0020] Figure 3 This utility model proposes an activation stage wastewater recycling device Figure 1 Schematic diagram of the structure of part B.

[0021] In the figure: 1, recovery tank; 101, liquid inlet; 102, liquid outlet; 103, pressure relief valve; 201, motor; 202, rotating shaft; 203, stirring rod; 301, air pipe; 302, air outlet; 401, connecting pipe 1; 402, connecting pipe 2; 403, nozzle. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Example:

[0024] Reference Figure 1-3, an activation stage wastewater recycling device, comprising a recovery tank 1, and also comprising: a stirring device, which is rotatably connected in the recovery tank 1; a connecting pipe 1 401, which is connected to the recovery tank 1, the air inlet end of the connecting pipe 1 401 is located at the top of the recovery tank 1, and the air outlet end of the connecting pipe 1 401 is located at the bottom of the recovery tank 1, and the air inlet end and the air outlet end of the connecting pipe 1 401 are respectively connected with a one-way valve and a pressure valve; a connecting pipe 2 402, which is arranged at the bottom of the recovery tank 1, and the connecting pipe 2 402 is communicated with the air inlet end of the connecting pipe 1 401; a nozzle 403, which is connected to the air outlet end of the connecting pipe 2 402, and the nozzle 403 is used to blow air to the bottom of the recovery tank 1, and the stirring device comprises a motor 201, a rotating shaft 20 2. A stirring rod 203, a rotating shaft 202 is rotatably connected in the recovery tank 1, multiple groups of stirring rods 203 are fixedly connected to the rotating shaft 202, a motor 201 is fixedly connected to the recovery tank 1, and the output end of the motor 201 is fixedly connected to the rotating shaft 202, and the end of the rotating shaft 202 away from the motor 201 is rotatably connected to the bottom surface of the recovery tank 1, the recovery tank 1 is connected to an air pipe 301, and multiple groups of air outlets 302 are arranged at the bottom of the stirring rod 203, and the air outlets 302 are communicated with the air pipe 301, a pressure relief valve 103 is arranged on the top of the recovery tank 1, and a liquid inlet 101 and a liquid outlet 102 are arranged on the recovery tank 1, and a tank cover and a control valve are respectively arranged on the liquid inlet 101 and the liquid outlet 102.

[0025] The pH of activated wastewater is greater than 12, and its main components are NaAlO2 and NaOH. For the main components of activated wastewater, the activated wastewater treatment can be effectively achieved through neutralization, flocculation precipitation, separation and other steps.

[0026] First, excessive carbon dioxide is introduced into the activated wastewater to react with NaAlO2 and NaOH in the wastewater to turn into a milky white liquid (main components are NaHCO3, NaCO3, Al(OH)3);

[0027] The specific steps are as follows: carbon dioxide gas is introduced into the air pipe 301, at which time the gas will be discharged through the air outlet 302 of the stirring rod 203, and then contact with the activated water to produce a milky white liquid, and at the same time, the motor 201 is started to stir the liquid. At this time, the gas that has passed through the activated water will accumulate on the top of the recovery tank 1, and then enter the one-way valve of the connecting pipe 401, enter the connecting pipe 401, until the pressure reaches the standard, enter the connecting pipe 2 402, and enter the recovery tank 1 again through the nozzle 403. At the same time, the stirring rod 203 can break up the gas blown out of the nozzle 403, further increase the contact between the gas and the liquid, and accelerate the reaction process. At the same time, the excess gas in the recovery tank 1 will be discharged through the pressure relief valve 103 to avoid excessive pressure and damage to the tank body.

[0028] Secondly, in order to accelerate the precipitation of the white liquid, a flocculant (PAM) is added to the solution to produce snowflake-like flocs that precipitate quickly;

[0029] The flocculant is injected through the liquid inlet 101, and the rotation of the motor 201 and the air injection are stopped to wait for the flocculants to settle.

[0030] Finally, when the pH of the supernatant is detected to be neutral and reaches the recycling standard, the liquid can be discharged and separated.

[0031] The utility model continuously injects carbon dioxide gas into the recovery tank 1 to promote the reaction between activated water and carbon dioxide for neutralization, and then performs precipitation separation to treat the wastewater, so as to facilitate the recycling and reuse of the activated wastewater.

[0032] The above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes within the technical scope disclosed by the present invention according to the technical solution and inventive concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An activation stage wastewater recycling device, comprising a recovery tank (1), characterized in that: Also includes: A stirring device, rotatably connected in the recovery tank (1); A connecting pipe (401) is connected to the recovery tank (1), the air inlet end of the connecting pipe (401) is located at the top of the recovery tank (1), and the air outlet end of the connecting pipe (401) is located at the bottom of the recovery tank (1), and the air inlet end and the air outlet end of the connecting pipe (401) are respectively connected to a one-way valve and a pressure valve; A second connecting pipe (402) is arranged at the bottom of the recovery tank (1), and the second connecting pipe (402) is connected to the air inlet end of the first connecting pipe (401); The nozzle (403) is connected to the gas outlet end of the second connecting pipe (402), and the nozzle (403) is used to blow the gas containing carbon dioxide into the liquid inside the recovery tank (1).

2. The activation stage wastewater recycling device according to claim 1, characterized in that: The stirring device comprises a motor (201), a rotating shaft (202), and a stirring rod (203); the rotating shaft (202) is rotatably connected in a recovery tank (1); a plurality of groups of stirring rods (203) are fixedly connected to the rotating shaft (202); the motor (201) is fixedly connected to the recovery tank (1); and the output end of the motor (201) is fixedly connected to the rotating shaft (202).

3. The activation stage wastewater recycling device according to claim 2 is characterized in that: One end of the rotating shaft (202) away from the motor (201) is rotatably connected to the bottom surface of the recovery tank (1).

4. The activation stage wastewater recycling device according to claim 3 is characterized in that: The recovery tank (1) is connected to an air pipe (301), and a plurality of groups of air outlets (302) are arranged at the bottom of the stirring rod (203), and the air outlets (302) are communicated with the air pipe (301).

5. The activation stage wastewater recycling device according to claim 1, characterized in that: A pressure relief valve (103) is provided on the top of the recovery tank (1).

6. The activation stage wastewater recycling device according to claim 1, characterized in that: The recovery tank (1) is provided with a liquid inlet (101) and a liquid outlet (102), and the liquid inlet (101) and the liquid outlet (102) are respectively provided with a tank cover and a control valve.

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