CN216172244U - A kind of reaction equipment for preparing polyaluminum chloride using bauxite tailings - Google Patents

Abstract

The utility model discloses reaction equipment for preparing polyaluminium chloride by using bauxite tailings, which comprises a kettle body, wherein the top of the kettle body is provided with a feeding pipe and a liquid inlet pipe; the reaction kettle is characterized in that a partition plate is arranged in the kettle body to divide the interior of the kettle body into an upper reaction area and a lower filtering area, the partition plate is conical, the middle of the partition plate is high, the periphery of the partition plate is low, a stirring shaft is arranged in the kettle body, the stirring shaft penetrates through the center of the partition plate and then is rotatably connected with a bearing in the filtering area, and a first stirring paddle is arranged on the part, located in the reaction area, of the side wall of the stirring shaft; a plurality of discharging pipes are arranged on the outer edge of the partition plate along the circumferential direction, and first electromagnetic valves are arranged on the discharging pipes; the reaction zone outer wall sets up heating jacket, cauldron body top still sets up the tail gas recovery pipe, the tail gas recovery pipe is connected with the recovery cauldron, the filtering area bottom sets up the discharging pipe, and this reaction unit structural design is reasonable, concentrates the collection to tail gas and handles, and the filter unit need not often to be changed.

Description

A kind of reaction equipment for preparing polyaluminum chloride using bauxite tailings

technical field

The utility model relates to the field of polyaluminum chloride production equipment, in particular to a reaction equipment for preparing polyaluminum chloride by utilizing bauxite tailings.

Background technique

Polyaluminum chloride (PAC) is an inorganic substance, a new water purification material and inorganic polymer coagulant, referred to as polyaluminum; it has a high degree of electrical neutralization and bridging effect on colloids and particles in water, and can be strongly removed. Micro toxic and heavy metal ions, stable properties. Due to the bridging effect of hydroxide ions and the polymerization of polyvalent anions, the produced polyaluminum chloride is an inorganic polymer water treatment agent with relatively large molecular weight and high electric charge.

my country's bauxite resources are very rich. In the process of bauxite beneficiation, methods such as desiliconization, desulfurization, and impurity removal are often carried out. Comprehensive utilization of tailings has become an important issue after beneficiation.

Chinese patent CN110156058A discloses a method for preparing water purifying agent polyaluminum chloride by using bauxite tailings, which includes roasting the bauxite tailings after grinding, and then performing acid leaching. After the reaction, filtering and precipitation, adding calcium carbonate to adjust the pH value; the method utilizes bauxite tailings to prepare polyaluminum chloride, and realizes the comprehensive utilization of bauxite tailings.

Chinese patent CN206965736U discloses an acid-dissolved glass-lined reaction equipment for the preparation of polyaluminum chloride. This patent is a special equipment for the preparation of polyaluminum chloride by acid dissolution, which can realize the preparation of qualified products with one equipment, and can realize automatic monitoring and control. ; But there are also some defects, such as:

First: the tail gas generated by the reaction is not treated, and if it is directly discharged, it will pollute the environment;

Second: the filter plate is a replaceable filter element structure, which needs to be replaced frequently, and the cost is high.

Utility model content

The purpose of the utility model is to overcome the shortcomings of the prior art, and to provide a kind of reaction equipment for preparing polyaluminum chloride using bauxite tailings, which has a reasonable structure design, centrally collects and processes the tail gas, and does not need to replace the filter unit frequently.

For realizing the above-mentioned purpose of the utility model, the technical scheme of the present utility model is:

A reaction equipment for preparing polyaluminum chloride by using bauxite tailings, comprising a kettle body, a feed pipe and a liquid inlet pipe are arranged on the top of the kettle body; In the filtration area of the filtration area and the lower part, the baffle plate is a conical shape with a high middle and a low circumference, and a stirring shaft is arranged in the kettle body. The upper end of the stirring shaft is connected with the drive motor arranged above the kettle body, and the part of the side wall of the stirring shaft located in the reaction zone is provided with a first stirring paddle; A first solenoid valve is arranged on the material pipe; a heating jacket is arranged on the outer wall of the reaction zone, a tail gas recovery pipe is also arranged on the top of the kettle body, and the tail gas recovery pipe is connected with the recovery kettle, and a discharge pipe and a discharge pipe are arranged at the bottom of the filter zone. A backwashing pipe is provided with a second solenoid valve on the discharge pipe, and a backwashing pump is provided on the backwashing pipe.

Preferably, an inverted conical filter unit is arranged in the filtering zone; a second stirring paddle is arranged on the part of the side wall of the stirring shaft located in the filtering zone, and the second stirring paddle is located above the filtering unit.

Preferably, the filter unit includes an upper filter screen, a filter membrane and a lower filter screen which are arranged in sequence from top to bottom.

Preferably, several suction disk groups are evenly arranged above the filter unit along the circumferential direction, and several suction disk groups are evenly arranged in the suction disk group along the radial direction of the filter unit. The side wall of the suction pipe is connected, the upper end of the suction pipe is closed, the upper end of the suction pipe is fixedly connected with the bearing, and the lower end passes through the bottom of the filter area and is connected with the suction main pipe, and the suction main pipe is provided with a suction pump.

Preferably, a plurality of electric heating tubes are evenly arranged on the bottom surface of the separator along the circumferential direction of the separator.

Preferably, a protective cover is sleeved on the heating pipe.

Preferably, a first temperature sensor, a second temperature sensor and a third temperature sensor are respectively arranged in the upper part, the middle part and the lower part of the reaction zone.

Preferably, a metering pump is provided on the liquid inlet pipe.

Preferably, a liquid level sensor is also arranged above the filter unit.

Preferably, a spray device is also provided on the top of the recovery kettle.

The beneficial effects of the present utility model are:

First: it integrates reaction and filtration, the equipment occupies a small area and the investment cost is low;

Second: set up exhaust gas recovery pipes and recovery kettles to avoid direct emission of exhaust gas to pollute the environment;

Third: a filter unit is set up in the filter area, the upper filter screen and the lower filter screen are used to protect the filter membrane in the middle, to prevent the damage to the filter membrane during backwashing and suction, and to prolong the service life of the filter membrane. The lower filter screen supports the filter membrane to prevent the filter membrane from loosening or sagging after long-term use;

Fourth: after long-term use, the filter membrane is backwashed by feeding water through the backwash tube, and then the filter membrane is cleaned by the suction disc and suction tube, which can prolong the service life of the filter membrane, and does not need to be replaced frequently, saving cost;

Fifth: an electric heating tube is arranged on the bottom surface of the separator, and in cooperation with the heating jacket, the materials in the reaction zone can be heated in all directions. The second temperature sensor and the third temperature sensor are used to detect the temperature of different parts in the reaction zone, which can precisely control the temperature of the reaction.

Description of drawings

Figure 1 is a schematic structural diagram of the utility model.

In the figure: 10 is the kettle body, 11 is the feeding pipe, 12 is the liquid feeding pipe, 13 is the separator, 13.1 is the discharging pipe, 13.2 is the first solenoid valve, 14 is the electric heating pipe, 15 is the protective cover, 16 is heating jacket, 17 is exhaust gas recovery pipe, 20 is reaction zone, 30 is filter zone, 31 is discharge pipe, 32 is second solenoid valve, 40 is stirring shaft, 41 is driving motor, 42 is first stirring paddle , 43 is the second stirring paddle, 50 is the bearing, 60 is the recovery kettle, 61 is the spray device, 70 is the filter unit, 71 is the upper filter screen, 72 is the filter membrane, 73 is the lower filter screen, 80 is the suction disc group, 81 is a suction plate, 82 is a suction pipe, 83 is a suction manifold, 84 is a suction pump, 90 is a first temperature sensor, 91 is a second temperature sensor, 92 is a third temperature sensor, 93 is a liquid level sensor.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings.

A reaction equipment for preparing polyaluminum chloride by using bauxite tailings, comprising a kettle body 10, a feeding pipe 11 and a liquid inlet pipe 12 are arranged on the top of the kettle body 10; The kettle body 10 is divided into an upper reaction zone 20 and a lower filter zone 30, the baffle 13 is a cone with a high middle and a low circumference, and a stirring shaft 40 is arranged in the kettle body 10, and the stirring shaft 40 passes through The center of the partition plate 13 is rotatably connected to the bearing 50 in the filter zone 30, the upper end of the stirring shaft 40 is connected to the driving motor 41 arranged above the kettle body 10, and the side wall of the stirring shaft 40 is located in the part of the reaction zone 20. The first stirring paddle 42 is provided; the outer edge of the partition plate 13 is provided with several discharge pipes 13.1 along the circumferential direction, and the discharge pipe 13.1 is provided with a first solenoid valve 13.2; the outer wall of the reaction zone 20 is provided with a heating jacket 16, The top of the kettle body 10 is also provided with a tail gas recovery pipe 17, and the tail gas recovery pipe 17 is connected to the recovery kettle 60. The bottom of the filter zone 30 is provided with a discharge pipe 31 and a backwash pipe (not shown in the figure). The discharge pipe 31 is provided with a second solenoid valve 32, and the backwash pipe is provided with a backwash pump (not shown in the figure).

Preferably, an inverted conical filter unit 70 is arranged in the filter area 30 ; the part of the side wall of the stirring shaft 40 located in the filter area 30 is provided with a second stirring paddle 43 , and the second stirring paddle 43 is located above the filter unit 70 .

Preferably, the filter unit 70 includes an upper filter screen 71 , a filter membrane 72 and a lower filter screen 73 which are arranged in order from top to bottom.

Claims (10)

1. A reaction device for preparing polyaluminium chloride by using bauxite tailings comprises a kettle body (10), wherein the top of the kettle body (10) is provided with a feeding pipe (11) and a liquid inlet pipe (12); the method is characterized in that: the reaction kettle is characterized in that a partition plate (13) is arranged in the kettle body (10) to divide the interior of the kettle body (10) into an upper reaction area (20) and a lower filtering area (30), the partition plate (13) is in a conical shape with a high middle part and a low periphery, a stirring shaft (40) is arranged in the kettle body (10), the stirring shaft (40) penetrates through the center of the partition plate (13) and then is rotatably connected with a bearing (50) in the filtering area (30), the upper end of the stirring shaft (40) is connected with a driving motor (41) arranged above the kettle body (10), and a first stirring paddle (42) is arranged on the part, located in the reaction area (20), of the side wall of the stirring shaft (40); a plurality of discharging pipes (13.1) are arranged on the outer edge of the partition plate (13) along the circumferential direction, and a first electromagnetic valve (13.2) is arranged on each discharging pipe (13.1); the reaction kettle is characterized in that a heating jacket (16) is arranged on the outer wall of the reaction zone (20), a tail gas recovery pipe (17) is further arranged at the top of the kettle body (10), the tail gas recovery pipe (17) is connected with a recovery kettle (60), a discharge pipe (31) and a back flushing pipe are arranged at the bottom of the filtering zone (30), a second electromagnetic valve (32) is arranged on the discharge pipe (31), and a back flushing pump is arranged on the back flushing pipe.

2. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings, which is claimed in claim 1, is characterized in that: an inverted cone-shaped filtering unit (70) is arranged in the filtering area (30); the part of the side wall of the stirring shaft (40) in the filtering area (30) is provided with a second stirring paddle (43), and the second stirring paddle (43) is positioned above the filtering unit (70).

3. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings as claimed in claim 2, wherein: the filtering unit (70) comprises an upper filtering net (71), a filtering net (72) and a lower filtering net (73) which are sequentially attached from top to bottom.

4. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings as claimed in claim 2, wherein: evenly set up a plurality of suction disc group (80) along circumference above filter unit (70), radially evenly set up a plurality of suction disc (81) along filter unit (70) in suction disc group (80), suction disc (81) and setting are at suction tube (82) lateral wall intercommunication at filter unit (70) center, suction tube (82) upper end is sealed and suction tube (82) upper end and bearing (50) fixed connection, and the lower extreme is worn out and is connected with suction manifold (83) after filtering area (30) bottom, sets up suction pump (84) on suction manifold (83).

5. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings, which is claimed in claim 1, is characterized in that: and a plurality of electric heating pipes (14) are uniformly arranged on the bottom surface of the partition plate (13) along the circumferential direction of the partition plate (13).

6. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings, which is claimed in claim 5, is characterized in that: the electric heating pipe (14) is sleeved with a protective cover (15).

7. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings, which is claimed in claim 1, is characterized in that: a first temperature sensor (90), a second temperature sensor (91) and a third temperature sensor (92) are respectively arranged at the upper part, the middle part and the lower part in the reaction zone (20).

8. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings, which is claimed in claim 1, is characterized in that: and a metering pump is arranged on the liquid inlet pipe (12).

9. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings as claimed in claim 2, wherein: and a liquid level sensor (93) is also arranged above the filtering unit (70).

10. The reaction equipment for preparing the polyaluminium chloride by using the bauxite tailings, which is claimed in claim 1, is characterized in that: and a spraying device (61) is also arranged at the top in the recovery kettle (60).

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