Before-valve solid-liquid separation device of multi-effect evaporative crystallization equipment

Abstract

The utility model discloses a before-valve solid-liquid separation device of multi-effect evaporative crystallization equipment, and belongs to the technical field of solid-liquid separation. The device is composed of an electromagnetic valve, a U-shaped reducing pipeline and a storage tank, the U-shaped reducing pipeline is installed on a feeding pipeline of the multi-effect evaporative crystallization equipment, the electromagnetic valve is installed at the lower end of the maximum reducing position of the U-shaped reducing pipeline, and the storage tank is arranged at the lower end of the electromagnetic valve and used for containing separated salt and particles. The U-shaped reducing pipeline is made of a corrosion-resistant material, and the storage tank is a waterproof semi-closed packaging container; the length of the U-shaped reducing pipeline is more than five times larger than the diameter of the feeding pipeline, and the largest part of the sectional area of the U-shaped reducing pipeline is more than three times larger than the sectional area of the feeding pipeline. According to the utility model, suspended salt and particulate matters can be collected by utilizing gravity and then discharged, so that the problem that a pipeline, a feeding pump and a valve are frequently blocked is solved, and the production time and the production efficiency are increased while the labor hour and the maintenance cost are reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of solid-liquid separation, and in particular relates to a pre-valve solid-liquid separation device of a multi-effect evaporation crystallization device for treating wastewater after wet deacidification of hazardous waste. Background Art

[0002] After the incineration of hazardous waste, a high-temperature mixed gas containing a large amount of acid and a small amount of particulate matter will be produced. This mixed gas is neutralized by spraying alkali liquid in the deacidification tower to become a neutral liquid with a high salt content. When these neutral liquids are at 40℃ to 60℃, most of the salt is dissolved in the liquid and has strong fluidity. When the temperature of these neutral liquids drops to about 20℃, most of the salt cannot be dissolved in the liquid, and a large amount of salt is precipitated.

[0003] The multi-effect evaporation crystallization equipment is a device that separates water and salt in the high-concentration brine of the wet deacidification neutralization tank by high-temperature evaporation. The high-concentration brine is pumped into the multi-effect evaporation crystallization equipment through the pipeline under the action of the feed pump. Because the temperature of the high-concentration brine is between 20℃ and 30℃ during the extraction process, some salt and particulate matter are in a suspended state and attached to the feed valve and feed pump, causing frequent blockage of the pipeline. Utility Model Content

[0004] The utility model aims to solve the above-mentioned shortcomings of multiple-effect evaporation crystallization equipment in practical applications, and proposes a pre-valve solid-liquid separation device for multiple-effect evaporation crystallization equipment for treating wastewater after wet deacidification of hazardous waste.

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

[0006] A pre-valve solid-liquid separation device of a multiple-effect evaporation crystallization device for treating wastewater after wet deacidification of hazardous wastes, comprising a solenoid valve, a U-shaped reducing pipe and a storage tank. The U-shaped reducing pipe is installed on a feed pipe of the multiple-effect evaporation crystallization device, the solenoid valve is installed at the lower end of the U-shaped reducing pipe at the maximum reducing point, and the storage tank is arranged at the lower end of the solenoid valve for containing separated salt and particulate matter.

[0007] Preferably, the U-shaped reducer pipe is made of corrosion-resistant materials, including but not limited to polytetrafluoroethylene, 316L stainless steel, etc.

[0008] Preferably, the storage tank is located at the lower end of the solenoid valve and is a waterproof semi-enclosed packaging container, including but not limited to IBC barrels, iron barrels, etc.

[0009] Compared with the prior art, the beneficial effects of the utility model are:

[0010] 1. In the utility model, the diameter of the U-shaped reducer pipe is larger than the diameter of the feed pipe of the multi-effect evaporation crystallization equipment, which slows down the flow rate of the liquid flowing through the U-shaped reducer pipe, and the salt and particulate matter in suspension are affected by gravity and precipitate downward and separate from the liquid; the remaining liquid continues to flow along the feed pipe of the multi-effect evaporation crystallization equipment to the subsequent device;

[0011] 2. In the utility model, the time interval for each opening of the solenoid valve and the duration of each opening of the valve are set by the program. The solenoid valve does not need to be controlled manually. Compared with manual opening and closing of the valve, the production efficiency is greatly improved. The suspended salt and particulate matter contained in the U-shaped reducer pipe are automatically discharged by controlling the solenoid valve, which solves the problem of frequent blockage of pipes, feed pumps and valves.

[0012] In summary, the utility model can collect and discharge salt and particulate matter in a suspended state by gravity, thereby reducing manpower hours and maintenance costs while increasing production time and efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the device of the utility model;

[0014] The names of the parts are: U-shaped reducing pipe 1, solenoid valve 2, storage tank 3. DETAILED DESCRIPTION

[0015] Example 1

[0016] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0017] Reference Figure 1 The utility model provides a pre-valve solid-liquid separation device of a multi-effect evaporation crystallization device for treating wastewater after wet deacidification of hazardous wastes, which is composed of a U-shaped reducing pipe 1, a solenoid valve 2, and a storage tank 3.

[0018] The U-shaped reducer pipe 1 is connected to the feed pipe of the multiple-effect evaporation crystallization equipment. The connection is set before the feed valve of the multiple-effect evaporation crystallization equipment. The solenoid valve 2 is installed at the lowest point of the U-shaped reducer pipe 1 (i.e. the point where the diameter is the largest). The storage tank 3 is placed at the lower end of the solenoid valve 2. When the multiple-effect evaporation crystallization equipment starts to feed, the high-concentration brine flows along the feed pipe to the feed valve. When it flows through the U-shaped reducer pipe 1, because the cross-sectional area of ​​the U-shaped reducer pipe 1 is much larger than the feed pipe, the flow rate of the high-concentration brine flowing here becomes slow, and the salt and particulate matter in the high-concentration brine in a suspended state begin to sink to form sediment, while the remaining liquid continues to flow through the feed valve along the feed pipe. The sinking sediment forms an accumulation at the bottom of the U-shaped reducer pipe 1. At this time, the solenoid valve 2 is opened, and the sediment automatically falls into the storage tank 3 under the influence of gravity and the pressure of the feed pipe.

[0019] In some embodiments of the present invention, the diameter of the solenoid valve 2 should be larger than the diameter of the feed pipe to facilitate the discharge of salt and particulate matter. In general applications, the diameter of the feed pipe is DN32, and the solenoid valve 2 can be a flange normally closed solenoid valve with a diameter of DN65 commonly found on the market.

[0020] In some embodiments of the utility model, the interval of the opening time of the solenoid valve 2 should be determined according to the amount of salt and particulate matter actually in a suspended state. The more suspended matter there is, the shorter the interval time of the solenoid valve 2 is set to open. In this embodiment, the time is set to open once every 30 minutes, and the opening time is 10 seconds, and so on. When the solenoid valve 2 is opened for 8 to 10 seconds, the discharged liquid gradually becomes clear. If the liquid discharged before the solenoid valve 2 is closed still contains suspended matter, the time interval of each valve opening can be shortened or the time of each continuous opening can be lengthened. If the solenoid valve 2 is opened for 4 to 8 seconds, the discharged liquid becomes clear, the time interval of each valve opening of the solenoid valve 2 should be lengthened or the time of each continuous opening of the solenoid valve 2 should be shortened.

[0021] In some embodiments of the utility model, the length of the U-shaped reducing pipe 1 (the direction of the feed pipe of the multi-effect evaporation crystallization equipment is defined as the length of the U-shaped reducing pipe 1, and the length is the distance from the beginning of the reducing pipe to the end of the reducing pipe) is 405mm. The U-shaped reducing pipe 1 is welded and processed using a 180° elbow and a 316L plate with a diameter of DN100, a material of 316L, and a center distance of 305mm on the market. During processing, due to different materials selected, the shapes do not have to be completely consistent, as long as the structures are roughly the same. If the length of the U-shaped reducing pipe 1 is too short, even if the cross-sectional area of ​​the pipe is large enough, the precipitation effect is not good. The precipitation effect of salt and particulate matter in a suspended state is related to the length and diameter of the U-shaped reducing pipe 1. The longer the pipe length and the larger the diameter, the better the precipitation effect of salt and particulate matter in a suspended state. To ensure that the suspended salt and particulate matter can be completely precipitated in the U-shaped reducer pipe 1, the length of the U-shaped reducer pipe 1 should be 5 times or more than the diameter of the feed pipe, and the maximum cross-sectional area of ​​the U-shaped reducer pipe 1 (i.e., the maximum diameter reduction point) should be 3 times or more than the cross-sectional area of ​​the feed pipe.

[0022] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. All modifications, equivalent replacements, etc. made within the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A pre-valve solid-liquid separation device for a multiple-effect evaporation crystallization device, characterized in that: The invention comprises a solenoid valve (2), a U-shaped reducing pipe (1) and a storage tank (3); the U-shaped reducing pipe (1) is installed on a feed pipe of a multi-effect evaporation crystallization device; the solenoid valve (2) is installed at the lower end of the U-shaped reducing pipe (1) at the maximum reducing position; and the storage tank (3) is arranged at the lower end of the solenoid valve.

2. A pre-valve solid-liquid separation device for a multiple-effect evaporation crystallization device as claimed in claim 1, characterized in that: The U-shaped reducer pipe (1) is made of corrosion-resistant material.

3. A pre-valve solid-liquid separation device for a multiple-effect evaporation crystallization device as claimed in claim 2, characterized in that: The U-shaped reducer pipe (1) is made of polytetrafluoroethylene or 316L stainless steel.

4. A pre-valve solid-liquid separation device for a multiple-effect evaporation crystallization device as claimed in claim 1, characterized in that: The storage tank (3) is a waterproof semi-enclosed packaging container.

5. The pre-valve solid-liquid separation device of the multiple-effect evaporation crystallization equipment according to claim 3, characterized in that: The storage tank (3) is an IBC barrel or an iron barrel.

6. A pre-valve solid-liquid separation device for a multiple-effect evaporation crystallization device as claimed in claim 1, characterized in that: The diameter of the solenoid valve (2) is larger than the diameter of the feed pipe.

7. A pre-valve solid-liquid separation device for a multiple-effect evaporation crystallization device as claimed in claim 6, characterized in that: The diameter of the feed pipe is DN32, and the solenoid valve (2) is a flange normally closed solenoid valve with a diameter of DN65.

8. The pre-valve solid-liquid separation device of the multiple-effect evaporation crystallization equipment according to claim 1, characterized in that: The length of the U-shaped reducer pipe (1) is greater than 5 times the diameter of the feed pipe, and the maximum cross-sectional area of ​​the U-shaped reducer pipe (1) is greater than 3 times the cross-sectional area of ​​the feed pipe.

Images