An over-burnt phosphogypsum washer

Abstract

The present application relates to phosphogypsum, in order to more efficiently wash phosphogypsum, provide a kind of super-blast phosphogypsum washer, including air supply device, and with the washing device of air supply device connection;Air supply device includes high-pressure tank, air compressor, with high-pressure tank connection's liquid pump, with high-pressure tank connection's liquid supply pipe, and first aeration device arranged in high-pressure tank inside;Air compressor is simultaneously connected with first aeration device and first aeration device;Washing device includes washing tank, is arranged in the discharge pipe of washing tank lower end, is arranged in the liquid discharge pipe of washing tank inside upper end, is arranged in the feed pipe below liquid discharge pipe, and second aeration device arranged in washing tank;Liquid supply pipe is connected with second aeration device.The super-blast phosphogypsum washer of the present application can efficiently wash phosphogypsum, reduce the use of chemical additives.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of phosphogypsum, in particular, relates to an ultra-blast phosphogypsum washing device. BACKGROUND

[0002] Phosphogypsum is a solid waste produced in the wet-process phosphoric acid process, and its components are mainly calcium sulfate dihydrate. The composition of phosphogypsum is relatively complex, in addition to calcium sulfate, there are also incomplete decomposition of phosphate rock, residual phosphoric acid, fluoride, acid-insoluble matter, organic matter, etc., among which the presence of fluoride and organic matter has the greatest impact on the resource utilization of phosphogypsum. The random discharge and accumulation of phosphogypsum seriously destroy the ecological environment, not only pollute the groundwater resources, but also waste the land resources.

[0003] The largest utilization scenario of phosphogypsum is to use it in the construction industry, but due to the presence of a large amount of harmful impurities in phosphogypsum, it must be treated before it can be fully utilized. The common treatment method is to wash the phosphogypsum, remove the impurities in the phosphogypsum through multiple washing, and also recover the phosphoric acid therein, so that it meets the standard that can be applied in the construction industry.

[0004] Because a large amount of impurities will directly adhere to the surface of the phosphogypsum, therefore, when washing the phosphogypsum, not only a certain amount of stirring and oscillation is needed to make the impurities can be separated from the surface of the phosphogypsum, and in order to better remove the impurities, it is also necessary to adjust the pH, add active agent to the washing liquid, etc., but in reality, the conventional stirring cannot remove the impurities well, so a large amount of active agent needs to be added to the washing liquid, and the addition of excessive active agent will also pollute the phosphogypsum to some extent, increase the difficulty of subsequent wastewater treatment, pollute the environment, etc.

[0005] Therefore, designing a device that can efficiently wash phosphogypsum can improve the cleaning efficiency of phosphogypsum to some extent and reduce the use of chemical reagents. SUMMARY

[0006] The purpose of the present application is to provide an ultra-blast phosphogypsum washing device, which can efficiently clean the phosphogypsum and reduce the use of chemical additives.

[0007] The embodiment of the application realizes the super-explosive phosphogypsum washer through the following technical scheme: the super-explosive phosphogypsum washer comprises a gas supply device and a washing device connected with the gas supply device; the gas supply device comprises a high-pressure tank, an air compressor, a liquid feeding pump connected with the high-pressure tank, a liquid supply pipe connected with the high-pressure tank, and a first aeration device arranged in the high-pressure tank; the air compressor is connected with the first aeration device; the washing device comprises a washing tank, a discharge pipe arranged at the lower end of the washing tank, a liquid discharge pipe arranged at the upper end in the washing tank, a feeding pipe arranged below the liquid discharge pipe, and a second aeration device arranged in the washing tank; the liquid supply pipe is connected with the second aeration device.

[0008] Further, the first aeration device comprises a first aeration pipe and a plurality of first aeration heads connected with the first aeration pipe; the outlet end of the air compressor is connected with the first aeration pipe.

[0009] Further, the second aeration device comprises a second aeration pipe and a plurality of second aeration heads connected with the second aeration pipe.

[0010] Further, the washing device further comprises a high-frequency oscillator arranged in the washing tank; the high-frequency oscillator is arranged below the feeding pipe.

[0011] Further, the washing device further comprises a sedimentation device arranged below the second aeration device, and the sedimentation device comprises a plurality of sedimentation plates distributed in the horizontal direction.

[0012] Further, the sedimentation plate is L-shaped in the vertical direction.

[0013] Further, the washing device further comprises a still device arranged between the liquid discharge pipe and the feeding pipe, and the still device comprises a plurality of still pipes closely connected; the axial directions of the plurality of still pipes are vertical directions.

[0014] Further, the washing device further comprises a defoaming device arranged in the washing tank, and the defoaming device is arranged above the liquid discharge pipe.

[0015] Further, the defoaming device comprises a wire mesh.

[0016] Further, the washing device further comprises an equalizing pipe arranged outside the washing tank, and one end of the equalizing pipe is connected with the upper end of the washing tank, and the other end of the equalizing pipe is communicated with the liquid discharge pipe.

[0017] The technical scheme of the embodiment of the present application has at least the following advantages and beneficial effects: the super-bursting phosphogypsum washer of the present application, when in use, first pumps air into the high-pressure tank by the air compressor, so that high pressure is formed inside, then the liquid pump pumps the cleaning liquid (containing active agent) into the high-pressure tank, at this time the other air outlet of the air compressor pumps high-pressure gas into the first aeration device, and then into the cleaning liquid, at this time the air pressure in the high-pressure tank (the air pressure above the liquid surface) is greater than the air pressure pumped into the first aeration device by the air compressor, so that the gas exposed from the first aeration device is compressed under high pressure and will not burst, so that the cleaning liquid forms a super-exposure state, then the gas-liquid mixture enters the washing tank through the liquid feeding pipe, at this time the washing tank is in a normal pressure state, so that the compressed gas in the liquid rapidly expands and bursts in the process of rising, and under the cooperation of the active agent, the impurities on the surface of the phosphogypsum are efficiently removed, and the impurities continue to rise with the gas flow (i.e. gas float washing), and finally are discharged through the liquid discharge pipe, and the phosphogypsum is discharged through the discharge pipe below. Through the cleaning method, real-time online cleaning of the phosphogypsum can be realized, the phosphogypsum can be continuously cleaned after being produced, the cleaning efficiency is high, less chemicals are used, and the method is more environmentally friendly and energy-saving. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope, and other related drawings can be obtained by those skilled in the art without creative labor.

[0019] Figure 1 The structure schematic diagram of the super-bursting phosphogypsum washer provided by the embodiment of the present application is shown in the figure.

[0020] Figure 2 The structure schematic diagram of the first aeration device part provided by the embodiment of the present application is shown in the figure.

[0021] Figure 3 The structure schematic diagram of the second aeration device part provided by the embodiment of the present application is shown in the figure.

[0022] Figure: 10-gas supply device, 11-high pressure tank, 12-air compressor, 13-liquid pump, 14-liquid supply pipe, 15-first aeration pipe, 16-first aeration head, 20-washing device, 21-washing tank, 22-discharge pipe, 23-liquid discharge pipe, 24-feeding pipe, 25-second aeration pipe, 26-second aeration head, 27-high-frequency oscillator, 28-settling plate, 29-precise stop pipe, 210-wire mesh, 211-pressure equalizing pipe. DETAILED DESCRIPTION

[0023] Embodiment

[0024] The present application will be further illustrated in conjunction with the specific embodiments as shown in the accompanying drawings, in which Figure 1 - the accompanying drawings Figure 3 The phosphogypsum scrubber of the present embodiment includes a gas supply device 10 and a scrubbing device 20 connected to the gas supply device 10. The gas supply device 10 includes a high-pressure tank 11, an air compressor 12, a liquid feeding pump 13 connected to the high-pressure tank 11, a liquid supply pipe 14 connected to the high-pressure tank 11, and a first aeration device arranged inside the high-pressure tank 11. The outlet end of the air compressor 12 is connected to the first aeration device. The scrubbing device 20 includes a scrubbing tank 21, a discharge pipe 22 arranged at the lower end of the scrubbing tank 21, a liquid discharge pipe 23 arranged at the upper end inside the scrubbing tank 21, a feeding pipe 24 arranged below the liquid discharge pipe 23, and a second aeration device arranged inside the scrubbing tank 21. The liquid supply pipe 14 is connected to the second aeration device. Specifically, in use, the air compressor 12 first pumps air into the high-pressure tank 11 to form high pressure inside, and then the liquid feeding pump 13 pumps cleaning liquid (containing active agent) into the high-pressure tank 11. At this time, the other outlet of the air compressor 12 pumps high-pressure gas into the first aeration device and then into the cleaning liquid. At this time, the gas pressure in the high-pressure tank 11 (the gas pressure above the liquid surface) is greater than the gas pressure pumped into the first aeration device by the air compressor 12, so that the gas exposed from the first aeration device is compressed under high pressure and will not break, causing the cleaning liquid to form a high-exposure state. Then the gas-liquid mixture enters the scrubbing tank 21 through the liquid feeding pipe. Since the scrubbing tank 21 is under normal pressure, the compressed gas in the liquid will expand and burst rapidly during the rising process. With the cooperation of the active agent, the impurities on the surface of the phosphogypsum are efficiently removed, and the impurities continue to rise with the gas flow (i.e. gas float scrubbing). Finally, the impurities are discharged through the liquid discharge pipe 23, and the phosphogypsum is discharged through the discharge pipe 22 below. Through the cleaning device and the cleaning method, real-time online cleaning of phosphogypsum can be achieved. After the phosphogypsum is produced, it can be continuously cleaned, with high cleaning efficiency, less use of chemicals, and more environmentally friendly and energy-saving.

[0025] The first aeration device in the present embodiment includes a first aeration pipe 15 and a plurality of first aeration heads 16 connected to the first aeration pipe 15. The outlet end of the air compressor 12 is connected to the first aeration pipe 15. The second aeration device includes a second aeration pipe 25 and a plurality of second aeration heads 26 connected to the second aeration pipe 25. Specifically, the structures of the first aeration device and the second aeration device are basically the same, both consisting of a pipe and an aeration head. The difference is that the number of the second aeration pipe 25 and the second aeration head 26 is significantly more. The gas is sprayed out through the extremely small holes on the aeration head (also known as bubble stone), so that the gas can be fully dispersed in the solution, increasing the contact area of the gas and the solution, and thus increasing the contact area of the gas and the phosphogypsum, and improving the cleaning efficiency of the phosphogypsum.

[0026] The washing device 20 in the embodiment further comprises a high-frequency oscillator arranged in the washing tank 21; the high-frequency oscillator is arranged below the feeding pipe 24. Specifically, the high-frequency oscillator is mainly an ultrasonic oscillator, which is mainly used for dispersing the phosphogypsum, so that the phosphogypsum can be fully dispersed in the solution and can fully contact with the bubbles.

[0027] The washing device 20 in the embodiment further comprises a settling device arranged below the second aeration device, and the settling device comprises a plurality of settling plates 28 arranged in the horizontal direction. The settling plates 28 are L-shaped in the vertical direction. Specifically, the settling device is mainly used for promoting the washed phosphogypsum to settle to the bottom. By arranging a plurality of settling plates 28, the phosphogypsum can enter between the settling plates 28, and the solution between the settling plates 28 has lower fluidity and is less likely to be stirred, so that the phosphogypsum particles are more likely to settle.

[0028] The washing device 20 in the embodiment further comprises a still device arranged between the liquid discharge pipe 23 and the feeding pipe 24, and the still device comprises a plurality of still pipes closely connected; the axes of the plurality of still pipes are in the vertical direction. Specifically, the still device can make the continuously stirred liquid stable here, which is similar to the principle of the settling device. When the liquid and the gas contact and enter the inside of the still pipe, the movement of the liquid can be effectively reduced, so that the liquid (containing the impurities washed out) can more stably enter the liquid discharge pipe 23 and be discharged.

[0029] The washing device 20 in the embodiment further comprises a defoaming device arranged in the washing tank 21, and the defoaming device is arranged above the liquid discharge pipe 23. The defoaming device comprises a wire mesh 210. Specifically, the metal wire mesh 210 can effectively eliminate the foam and avoid accumulation of a large amount of foam above the washing tank 21.

[0030] The washing device 20 in the embodiment further comprises an equalizing pipe 211 arranged outside the washing tank 21, and one end of the equalizing pipe 211 is connected with the upper end of the washing tank 21, and the other end of the equalizing pipe 211 is in communication with the liquid discharge pipe 23. Specifically, the equalizing pipe 211 is mainly used for discharging the gas and keeping the air pressure in the washing tank 21 stable. The equalizing pipe 211 can also avoid a large amount of liquid from being discharged from the liquid discharge pipe 23.

[0031] In summary, the super-bursting phosphogypsum washing device in the embodiment can realize real-time online washing of the phosphogypsum by the cleaning device and the corresponding cleaning method. The phosphogypsum can be continuously washed after being produced, and the cleaning efficiency is high, the use of chemicals is less, and the device is more environmentally friendly and energy-saving.

[0032] The above merely describes the preferred embodiments of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A super explosive phosphogypsum detergent, characterized in that: It includes an air supply device and a washing device connected to the air supply device; The air supply device includes a high-pressure tank, an air compressor, a liquid pump connected to the high-pressure tank, a liquid supply pipe connected to the high-pressure tank, and a first aeration device disposed inside the high-pressure tank; the air compressor is connected to the first aeration device. The washing device includes a washing tank, a discharge pipe located at the lower end of the washing tank, a liquid drain pipe located at the upper end of the interior of the washing tank, a feed pipe located below the liquid drain pipe, and a second aeration device located inside the washing tank; the liquid supply pipe is connected to the second aeration device. The washing device further includes a high-frequency oscillator disposed inside the washing tank; the high-frequency oscillator is located below the feed pipe; The washing device also includes a settling device located below the second aeration device, the settling device comprising multiple settling plates distributed horizontally; The settling plate has an L-shaped cross-section in the vertical direction; The washing device further includes a stationary device disposed between the drain pipe and the feed pipe, the stationary device comprising multiple closely connected stationary pipes; the axial direction of the multiple stationary pipes is vertical. The washing device also includes a defoaming device disposed inside the washing tank, the defoaming device being located above the drain pipe; The demister includes a wire mesh; The washing device also includes a pressure equalization pipe located outside the washing tank. One end of the pressure equalization pipe is connected to the upper end of the washing tank, and the other end is connected to the drain pipe.

2. The super-explosive phosphogypsum detergent according to claim 1, characterized in that: The first aeration device includes a first aeration pipe and a plurality of first aeration heads connected to the first aeration pipe; The outlet end of the air compressor is connected to the first aeration pipe.

3. The super-explosive phosphogypsum detergent according to claim 1, characterized in that: The second aeration device includes a second aeration pipe and a plurality of second aeration heads connected to the second aeration pipe.

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