Device for efficiently recovering salt in salty mud

Abstract

The utility model discloses a device for efficiently recovering salt in salty mud, which comprises a stirring tank, a waste gas connecting pipe, a colloid mill, a storage tank and a plate-and-frame filter press, the salty mud and water enter the input end of the stirring tank through a pipeline, the colloid mill and the storage tank are additionally arranged, and mechanical stirring and steam stirring are synchronously carried out, so that the stirring effect is better, and the service life is prolonged. Meanwhile, waste gas generated by steam stirring is connected with the input end of the compression fan through the waste gas connecting pipe, so that the gas is reasonably utilized, unnecessary waste is avoided, full mixing of the slurry is guaranteed, the efficient recycling effect is achieved, meanwhile, the foaming pipe is very convenient to mount and dismount, and the effect of convenient cleaning is achieved.

Description

Technical field:

[0001] The utility model relates to the field of efficient utilization of salt mud, in particular to a device for efficiently recovering salt from salt mud. Background technology:

[0002] The salt mud of the chlor-alkali industry is the slurry waste generated during the primary brine refining process of caustic soda. During the primary brine refining process, auxiliary materials such as sodium hydroxide / potassium hydroxide, barium chloride, potassium carbonate, etc. are added to help remove impurities contained in the brine, and new precipitates are generated in the process of adding auxiliary materials. These precipitates will be mixed with the brine and discharged from the reaction tanks of each part. The clear liquid obtained after the mixture is separated by the filter press is the brine returned to the salt tank for continued use, and the discharge from the filter press is salt mud. According to statistics from the chlor-alkali industry, 50-60kg of salt mud will be generated for every ton of caustic soda produced, and the annual production of salt mud is about 2 million tons.

[0003] Salt mud mainly contains barium sulfate, calcium carbonate, magnesium hydroxide, soluble salt and other insoluble substances. The salt in salt mud has a high resource recovery value, but at the same time, the chlorine and barium components in salt mud will pollute the environment. With the increasing attention paid by society and enterprises to environmental protection, especially after my country proposed a sustainable development strategy, the treatment of salt mud is a difficult problem that needs to be solved urgently in the domestic chlor-alkali industry. The discharge of a large amount of salt mud will cause serious pollution to the environment. If it is piled up and stored, it will take up a lot of space, which will increase the cost of the enterprise. Therefore, in order to avoid the waste of salt mud resources and environmental pollution, it is urgent to realize the efficient utilization of salt mud.

[0004] The existing salt mud recycling systems are mostly transported to a plate and frame filter press for filtration after stirring, the precipitated clear liquid is recycled and reused, and the filtration mud cake is utilized as a resource. The stirring structure in the system does not stir the mixture sufficiently, which causes some recyclable resources to be filtered into the mud cake, and efficient recycling cannot be achieved. Utility model content:

[0005] The utility model aims to provide a device for efficiently recovering salt from salt mud.

[0006] The utility model is implemented by the following technical solutions:

[0007] A device for efficiently recovering salt from salt mud comprises a stirring tank, an exhaust gas connecting pipe, a colloid mill, a storage tank and a plate and frame filter press, wherein salt mud and water enter the input end of the stirring tank through a pipeline, the output end of the stirring tank is fixedly connected to the input end of the colloid mill, the output end of the colloid mill is fixedly connected to the input end of the storage tank, the output end of the storage tank is fixedly connected to the input end of the plate and frame filter press, one end of the exhaust gas connecting pipe is fixedly connected to the exhaust gas outlet of the stirring tank, an air box is provided on one side of the storage tank, a compression fan is fixedly installed at the input end of the air box, the output end of the compression fan is fixedly connected to the input end of the air box, and the other end of the exhaust gas connecting pipe is fixedly connected to the input end pipeline of the compression fan.

[0008] Preferably, a plurality of positioning cylinders are fixedly connected to the side wall of the air box, each positioning cylinder is sleeved with a connecting cylinder, a foaming tube is inserted into each connecting cylinder, each foaming tube passes through the storage tank, one end of each foaming tube is sleeved on the corresponding positioning cylinder, one end of the foaming tube is T-shaped, the T-shaped end of each foaming tube is fixedly connected to the corresponding connecting cylinder by bolts, each connecting cylinder is fixedly embedded in the side wall of the storage tank, a scraper is fixedly installed on each connecting cylinder, each scraper is arranged to fit the bottom of the corresponding foaming tube, and a plurality of holes are arranged on the outside of the foaming tube.

[0009] Preferably, the connecting tube is composed of three parts: two straight tubes and a plurality of connecting rods. The plurality of connecting rods are arranged between the two straight tubes, and the three parts are fixed to each other.

[0010] Preferably, sealing rubber pads are fixedly installed at the connections of the connecting tube, the foaming tube and the positioning tube.

[0011] The advantages of the utility model are as follows: a colloid mill and a storage tank are added, and mechanical stirring and steam stirring are carried out simultaneously, so that the stirring effect is better. At the same time, the exhaust gas generated by steam stirring is connected to the input end of the compression fan through the exhaust gas connecting pipe, so that the gas is used rationally and unnecessary waste is avoided, thereby ensuring the full mixing of the slurry and achieving the effect of efficient recovery. At the same time, the installation and disassembly of the foaming tube are also very convenient, which makes it easy to clean. Description of the drawings:

[0012] Figure 1 It is a system flow chart of the structure of the utility model;

[0013] Figure 2 It is a structural diagram of the storage tank in the structure of the utility model;

[0014] Figure 3 It is an enlarged schematic diagram of A in the structure of the utility model.

[0015] In the figure: agitating tank 1, exhaust gas connecting pipe 2, colloid mill 3, storage tank 4, plate and frame filter press 5, air box 6, connecting tube 7, foaming tube 8, positioning tube 9, scraper 10. Specific implementation method:

[0016] like Figures 1 to 3 As shown, a device for efficiently recovering salt from salt mud comprises a stirring tank 1, an exhaust gas connecting pipe 2, a colloid mill 3, a storage tank 4 and a plate-frame filter press 5, the salt mud and water enter the input end of the stirring tank 1 through a pipeline, the output end of the stirring tank 1 is fixedly connected to the input end of the colloid mill 3, the output end of the colloid mill 3 is fixedly connected to the input end of the storage tank 4, the output end of the storage tank 4 is fixedly connected to the input end of the plate-frame filter press 5, one end of the exhaust gas connecting pipe 2 is fixedly connected to the exhaust gas outlet of the stirring tank 1, an air box 6 is provided on one side of the storage tank 4, a compression fan is fixedly installed at the input end of the air box 6, the output end of the compression fan is fixedly connected to the input end of the air box 6, the other end of the exhaust gas connecting pipe 2 is fixedly connected to the input end pipeline of the compression fan, and the chlorine The salt mud produced by the alkali plant is transported to the scale by vehicle, and then transported to the mixing tank 1 after being measured and weighed. The salt mud is poured into the mixing tank 1 and a fixed proportion of water is added. Then, mechanical stirring and steam stirring are turned on at the same time for slurrying. After that, the mixed slurry after slurrying is pumped into the colloid mill 3 through the mud pump at the output pipeline of the mixing tank 1 for grinding. The ground slurry enters the storage tank 4 below the colloid mill 3 through the pipeline. In the process of the mixed slurry entering the storage tank 4, the air stirring arranged at the air box 6 and passing through the storage tank 4 is turned on to prevent the slurry from settling. After all the mixed slurry enters the storage tank 4, it is pumped into the plate and frame filter press 5 by the mud pump for filtration. The clear liquid filtered out is sent to the salt tank for recycling, and the mud cake filtered out is recycled.

[0017] A plurality of positioning cylinders 9 are fixedly connected to the side wall of the air box 6, each positioning cylinder 9 is sleeved with a connecting cylinder 7, a foaming tube 8 is inserted into each connecting cylinder 7, each foaming tube 8 passes through the storage tank 4, one end of each foaming tube 8 is sleeved on the corresponding positioning cylinder 9, one end of the foaming tube 8 is T-shaped, and the T-shaped end of each foaming tube 8 is fixedly connected to the corresponding connecting cylinder 7 by bolts, each connecting cylinder 7 is fixedly embedded in the side wall of the storage tank 4, a scraper 10 is fixedly installed on each connecting cylinder 7, and each scraper 10 is fitted with the bottom of the corresponding foaming tube 8. When air stirring is performed, the compression fan works to blow compressed gas into the air box 6, and then transports it to the foaming tube 8 through a plurality of positioning cylinders 9, and foams. The outside of the bubble tube 8 is provided with a plurality of holes for facilitating the discharge of compressed air so that the slurry inside can be fully stirred. At the same time, in order to facilitate the cleaning of the foaming tube 8, the foaming tube 8 can be directly pulled out from one end during the cleaning process. At the same time, in order to avoid clogging of the holes, a scraper 10 is provided, and each foaming tube 8 is rotated 360 degrees at intervals. During the rotation, the scraper 10 fits the bottom of the foaming tube, which will clean up the fine particles blocking the edge of the hole and seal the hole at the bottom. In this way, due to the constant pressure of the compressed air, when some holes are blocked, the pressure of the remaining holes will increase, thereby blowing the blocked slurry, thereby achieving the cleaning effect.

[0018] The connecting tube 7 is composed of two straight tubes and a plurality of connecting rods. The plurality of connecting rods are arranged between the two straight tubes and the three parts are fixed to each other, so that the cleaning of the foaming tube 8 can be facilitated while ensuring air circulation.

[0019] Sealing pads are fixedly installed at the joints of the connecting tube 7, the foaming tube 8 and the positioning tube 9 to play a sealing role and prevent pressure leakage.

[0020] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for efficiently recovering salt from salt mud, characterized in that: It includes a stirring tank, an exhaust gas connecting pipe, a colloid mill, a storage tank and a plate and frame filter press. Salt mud and water enter the input end of the stirring tank through a pipeline. The output end of the stirring tank is fixedly connected to the input end of the colloid mill, the output end of the colloid mill is fixedly connected to the input end of the storage tank, the output end of the storage tank is fixedly connected to the input end of the plate and frame filter press, one end of the exhaust gas connecting pipe is fixedly connected to the exhaust gas outlet of the stirring tank, an air box is provided on one side of the storage tank, a compression fan is fixedly installed at the input end of the air box, the output end of the compression fan is fixedly connected to the input end of the air box, and the other end of the exhaust gas connecting pipe is fixedly connected to the input end pipeline of the compression fan.

2. The device for efficiently recovering salt from salt mud according to claim 1, characterized in that: A plurality of positioning cylinders are fixedly connected to the side wall of the air box, each positioning cylinder is sleeved with a connecting cylinder, a foaming tube is inserted into each connecting cylinder, each foaming tube passes through the storage tank, one end of each foaming tube is sleeved on the corresponding positioning cylinder, one end of the foaming tube is T-shaped, the T-shaped end of each foaming tube is fixedly connected to the corresponding connecting cylinder by bolts, each connecting cylinder is fixedly embedded in the side wall of the storage tank, a scraper is fixedly installed on each connecting cylinder, each scraper is arranged to fit the bottom of the corresponding foaming tube, and a plurality of holes are arranged on the outside of the foaming tube.

3. The device for efficiently recovering salt from salt mud according to claim 2 is characterized in that: The connecting tube is composed of three parts: two straight tubes and a plurality of connecting rods. The plurality of connecting rods are arranged between the two straight tubes, and the three parts are fixed to each other.

4. The device for efficiently recovering salt from salt mud according to claim 2, characterized in that: Sealing rubber pads are fixedly installed at the connection points of the connecting tube, the foaming tube and the positioning tube.

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