Perchlorate wastewater treatment device

Abstract

The utility model discloses a perchlorate wastewater treatment device which comprises an evaporation box, a fan, a motor, a rotating shaft and a plurality of stirring pipes, the rotating shaft and the stirring pipes are arranged in the evaporation box, the rotating shaft is connected with the output end of the motor, and a gas outlet is formed in the evaporation box; a cavity is formed in the rotating shaft and is communicated with an air outlet pipe of the fan; one end of the stirring pipe is communicated with the cavity, and an opening is formed in the other end of the stirring pipe and faces the side wall of the evaporation box. The problem that perchlorate crystals on the inner surface of the evaporation box cannot be treated is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of perchlorate wastewater treatment, and specifically relates to a perchlorate wastewater treatment device. Background Art

[0002] Potassium perchlorate is a type of perchlorate salt, which can be used as a smoke generator, igniter and oxidant. It is flammable and explosive and is often used in the production process of fireworks and firecrackers. At present, in the production process of fireworks and firecrackers, production wastewater is usually only subjected to multi-stage precipitation treatment. Since perchlorate is soluble in water, potassium perchlorate in wastewater cannot be removed only through multi-stage precipitation treatment. The discharge of wastewater containing high-concentration potassium perchlorate into natural water bodies will lead to an increase in the salt concentration of natural water bodies, which will in turn affect the aquatic ecosystem. Humans and livestock will be in contact with contaminated water bodies, which will cause harm to the life and health of humans and animals. Common perchlorate wastewater treatment methods include evaporation, electrolysis, membrane separation and biological methods, but the treatment costs of electrolysis, membrane separation and biological methods are too high. Considering the treatment costs that most township enterprises can afford, evaporation is a more suitable choice for treating potassium perchlorate wastewater. However, after the wastewater in the existing evaporation device evaporates, a layer of perchlorate crystals will be covered inside the box. Since the evaporation box is closed, the potassium perchlorate crystals on the inner surface of the box are difficult to remove.

[0003] China Utility Model Patent Authorization Announcement No. CN217921530U discloses a potassium perchlorate wastewater harmless treatment device, which monitors whether the potassium perchlorate in the wastewater has reached a saturated concentration through an external monitoring sensor, and when the saturated concentration is reached, the saturated potassium perchlorate wastewater is discharged for electrolytic treatment. However, high-salt wastewater will remain inside the evaporation box of the device, and a portion of perchlorate crystals will still remain on the inner surface of the evaporation box.

[0004] China Utility Model Patent Authorization Announcement No. CN217458879U discloses a low-cost resource recovery device for treating high-salt wastewater. The device has a collection tray installed at the bottom of the box, and a second rotating shaft installed on the collection tray. The second rotating shaft drives the fixed rod and the scraper block to rotate. During the rotation, the scraper block moves in a spiral shape from the outside to the inside on the collection tray, thereby gathering the scattered salt crystals to the middle, and then discharging them through the discharge valve. This evaporation equipment can effectively remove potassium perchlorate crystals on the collection tray at the bottom of the evaporation box, but the potassium perchlorate crystals on the side surface of the box body cannot be removed. In addition, since perchlorates are flammable and explosive, during the process of the scraper block scraping the potassium perchlorate crystals on the collection tray, the scraper block will rub and scrape against the potassium perchlorate on the collection tray, which can easily cause the contact surface temperature to rise or generate static sparks, and eventually cause the equipment to explode. Utility Model Content

[0005] In view of the current technical problems, the utility model aims to provide a perchlorate wastewater treatment device, which can solve the problem that perchlorate crystals on the inner surface of the evaporator cannot be treated, thereby eliminating the safety problems caused by perchlorate crystals on the side surface.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A perchlorate wastewater treatment device comprises an evaporation box, and its structural features are: it also comprises a fan, a motor, a rotating shaft and a plurality of stirring tubes arranged in the evaporation box, the rotating shaft is connected to the output end of the motor, and a gas outlet is arranged on the evaporation box; a cavity is arranged in the rotating shaft, and the cavity is connected to the air outlet pipe of the fan; one end of the stirring tube is connected to the cavity, and the other end is provided with an opening, and the opening faces the side wall of the evaporation box.

[0008] When the device is used, the fan and the motor are turned on, and the rotating shaft drives the stirring tube to rotate in the evaporation box under the drive of the motor. The airflow from the fan is sprayed to the side wall of the evaporation box through the opening at the end of the stirring tube and then discharged through the gas outlet. The perchlorate crystals attached to the side wall of the evaporation box are blown off by the airflow, thereby solving the problem that the perchlorate crystals on the inner wall of the evaporation box cannot be treated. The perchlorate wastewater treatment device of the utility model can effectively remove the perchlorate crystals on the side wall of the evaporation box through the non-contact air jet of the stirring tube, and effectively prevents the danger caused by the friction between the scraper block and the perchlorate.

[0009] Furthermore, a sloped bottom plate is provided at the bottom of the evaporation box, a discharge valve is provided at the foot of the sloped bottom plate on the bottom wall of the evaporation box, and a hopper is provided below the discharge valve. The perchlorate crystals blown off by the airflow gather at the lowest point of the inclined surface of the sloped bottom plate at the bottom of the evaporation box, and are discharged to the hopper through the discharge valve.

[0010] Preferably, a plurality of second one-way valves are provided on the side wall of the stirring tube at the bottom layer of the rotating shaft, and the plurality of second one-way valves are all facing the sloped bottom plate. By providing the second one-way valves, the airflow of the fan is blown out through the second one-way valves, so that the perchlorate crystals on the sloped bottom plate are smoothly separated from the inclined surface of the sloped bottom plate and discharged into the hopper through the discharge valve.

[0011] Preferably, the fan is arranged above the top of the evaporator box, and an air outlet pipe of the fan passes through the top wall of the evaporator box and is connected to the rotating shaft through a bearing seal.

[0012] Specifically, the bearing is a ball bearing, and sealing rings are provided at the connection between the ball bearing and the air outlet pipe and the rotating shaft of the fan.

[0013] Preferably, a first one-way valve is provided at the end opening of the stirring tube, and the first one-way valve faces the side wall of the evaporation box.

[0014] Specifically, the rotating shaft is arranged vertically, and a plurality of stirring tubes are arranged on both sides of the rotating shaft along the height direction of the rotating shaft.

[0015] Specifically, the motor is arranged below the bottom of the evaporator box.

[0016] Preferably, the fan is a pulse jet fan.

[0017] Specifically, the gas outlet is arranged on the top wall of the evaporation box.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The perchlorate wastewater treatment device of the utility model uses jet treatment of the stirring tube, and the perchlorate crystals on the inner surface of the evaporation box are blown down to the hopper, which solves the problem that the perchlorate crystals on the inner surface of the evaporation box cannot be treated, and eliminates the safety problems caused by the perchlorate crystals on the side surface.

[0020] 2. The perchlorate wastewater treatment device of the utility model processes perchlorate crystals by non-contact jetting through a stirring tube, thereby effectively preventing the danger caused by friction between a scraper block and perchlorate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the structure of the perchlorate wastewater treatment device of the utility model;

[0022] Figure 2 for Figure 1 The enlarged structural diagram at A in the middle;

[0023] Figure 3 for Figure 1 Detailed schematic diagram of the removal of perchlorate crystals inside the evaporation box.

[0024] In the figure:

[0025] 1-evaporation box; 2-water inlet; 3-gas outlet; 4-fan; 5-heating device; 6-sloped bottom plate; 7-discharge valve; 8-motor; 9-hopper; 10-rotating shaft; 101-cavity; 11-bearing; 12-stirring tube; 13-first one-way valve; 14-second one-way valve; 15-sealing ring; 16-jet airflow; 17-water outlet. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments. It should be noted that the embodiments and features in the embodiments of the present invention can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear in the following text, they only indicate that the upper, lower, left and right directions are consistent with the drawings themselves, and do not limit the structure.

[0027] like Figure 1 As shown, a perchlorate wastewater treatment device of this embodiment includes an evaporation box 1, a fan 4, a motor 8, and a rotating shaft 10 and a plurality of stirring tubes 12 arranged in the evaporation box 1. A water inlet 2 is provided on the left side of the top wall of the evaporation box 1, a gas outlet 3 is provided on the right side of the top wall, a heating device 5 is provided on the left and right side walls, and a water outlet 17 is provided on the lower part of the side wall. The rotating shaft 10 is vertically arranged in the evaporation box 1, and a plurality of stirring tubes 12 are arranged on both sides of the rotating shaft 10 along the height direction of the rotating shaft 10. The motor 8 is arranged at the bottom of the evaporation box 1, and the output end of the motor 8 is connected to the rotating shaft 10. As shown in FIG. Figure 2 As shown, the fan 4 is arranged above the top of the evaporator box 1, and the air outlet pipe of the fan 4 penetrates the top wall of the evaporator box 1 and is sealed and connected to the rotating shaft 10 through the bearing 11. The fan 4 is a pulse jet fan, and the bearing 11 is a ball bearing. The connection between the ball bearing and the air outlet pipe of the fan 4 and the rotating shaft 10 is provided with a sealing ring 15. A cavity 101 is provided in the rotating shaft 10, and the cavity 101 is connected to the air outlet pipe of the fan 8. One end of the stirring tube 12 is connected to the cavity 101, and the other end is provided with a first one-way valve 13, and the first one-way valve 13 faces the side wall of the evaporator box 1. A plurality of second one-way valves 14 are provided on the side wall of the stirring tube 12 located at the bottom of the rotating shaft 10, and the plurality of second one-way valves 14 all face the bottom of the evaporator box 1. A sloped bottom plate 6 is provided at the bottom of the evaporator box 1, and the slope angle of the sloped bottom plate 6 is 15°. A discharge valve 7 is provided on the bottom wall of the evaporation box 1 . The discharge valve 7 is arranged at the lowest side of the sloped bottom plate 6 . A hopper 9 is provided below the discharge valve 7 .

[0028] The device of this embodiment is used for potassium perchlorate wastewater treatment. Potassium perchlorate wastewater enters the evaporation box 1 through the water inlet 2. After the wastewater is heated by the heating device 5, the steam leaves from the gas outlet 3. After the wastewater in the evaporation box 1 evaporates to a saturated concentration, it is discharged through the water outlet 17. The motor 8 continues to drive the rotating shaft 10 and the stirring tube 12 to rotate. At the same time, the fan 4 is turned on to allow the airflow to enter the stirring tube 12 through the rotating shaft 10. Finally, the gas from the fan 4 passes through the first one-way valve 13 and the second one-way valve 14 to perform back-blowing treatment on the inside of the evaporation box 1. Figure 3 As shown, when the fan 4 and the motor 8 are turned on, the rotating shaft 10 rotates and drives the stirring tube 12 to rotate horizontally, and the jet airflow 16 from the fan 4 is sprayed to the inner surface of the evaporation box 1 through the first one-way valve 102 and the second one-way valve 14, and the potassium perchlorate crystals attached thereto are blown off, and the crystals are guided by the sloped bottom plate 6 and fall into the hopper 9 through the discharge valve 7. When the crystals are cleaned up, the discharge valve 7 and the fan 4 are closed, and a new round of wastewater treatment can be carried out again.

[0029] The contents explained in the above embodiments should be understood as these embodiments are only used to more clearly illustrate the present invention, and are not used to limit the scope of the present invention. After reading the present invention, various equivalent forms of modifications to the embodiments by those skilled in the art fall within the scope defined by the claims attached to the present invention.

Claims

1. A perchlorate wastewater treatment device, comprising an evaporation tank (1), characterized in that: It also includes a fan (4), a motor (8), a rotating shaft (10) and a plurality of stirring tubes (12) arranged in the evaporation box (1), wherein the rotating shaft (10) is connected to the output end of the motor (8), and the evaporation box (1) is provided with a gas outlet (3); A cavity (101) is provided in the rotating shaft (10), and the cavity (101) is connected to the air outlet pipe of the fan (4); One end of the stirring tube (12) is connected to the cavity (101), and the other end is provided with an opening, which faces the side wall of the evaporation box (1).

2. The perchlorate wastewater treatment device according to claim 1, characterized in that: The bottom of the evaporation box (1) is provided with a sloped bottom plate (6), the bottom wall of the evaporation box (1) is provided with a discharge valve (7) located at the foot of the sloped bottom plate (6), and a hopper (9) is provided below the discharge valve (7).

3. The perchlorate wastewater treatment device according to claim 2, characterized in that: A plurality of second one-way valves (14) are arranged on the side wall of the stirring tube (12) at the bottom layer of the rotating shaft (10), and the plurality of second one-way valves (14) are all facing the sloped bottom plate (6).

4. The perchlorate wastewater treatment device according to claim 1, characterized in that: The fan (4) is arranged above the top of the evaporator box (1); an air outlet pipe of the fan (4) penetrates the top wall of the evaporator box (1) and is sealed and connected to the rotating shaft (10) via a bearing (11).

5. The perchlorate wastewater treatment device according to claim 4, characterized in that: The bearing (11) is a ball bearing, and sealing rings (15) are provided at the connection between the ball bearing, the air outlet pipe of the fan (4) and the rotating shaft (10).

6. The perchlorate wastewater treatment device according to any one of claims 1 to 5, characterized in that: A first one-way valve (13) is provided at the end opening of the stirring tube (12), and the first one-way valve (13) faces the side wall of the evaporation box (1).

7. The perchlorate wastewater treatment device according to any one of claims 1 to 5, characterized in that: The rotating shaft (10) is arranged vertically, and a plurality of stirring tubes (12) are arranged on both sides of the rotating shaft (10) along the height direction of the rotating shaft (10).

8. The perchlorate wastewater treatment device according to any one of claims 1 to 5, characterized in that: The motor (8) is arranged below the bottom of the evaporator box (1).

9. The perchlorate wastewater treatment device according to any one of claims 1 to 5, characterized in that: The fan (4) is a pulse jet fan.

10. The perchlorate wastewater treatment device according to any one of claims 1 to 5, characterized in that: The gas outlet (3) is arranged on the top wall of the evaporation box (1).

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