Resourceful treatment device for magnesium sulfate wastewater

Abstract

The utility model discloses a magnesium sulfate wastewater resourceful treatment device which comprises a reaction kettle, the reaction kettle comprises a kettle body and an inner container, the inner container is fixed in the kettle body, a settlement area is formed between the outer wall of the inner container and the inner wall of the kettle body, and a fluidization area is formed between the top of the inner container and the top of the kettle body; the defoaming system is arranged at the top end of the kettle body; the aeration system is arranged at the bottom of the inner container; the discharging system is arranged at the bottom of the kettle body; the heating system is mounted in the inner container; wherein the upper end and the lower end of the inner container are fixedly communicated with feeding ports respectively, and a plurality of sampling ports are vertically formed in the outer wall of the kettle body at equal intervals. In the resourceful treatment process of the magnesium sulfate wastewater, the fluid in the kettle body is driven by air flow to realize fluidization, the magnesium sulfate wastewater and a precipitator are uniformly mixed, product agglomeration is avoided, differentiated growth of calcium sulfate and magnesium hydroxide is realized in a fluid field, and favorable conditions are provided for subsequent resourceful recovery of the calcium sulfate and the magnesium hydroxide.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field especially a kind of magnesium sulfate wastewater resource treatment device. BACKGROUND

[0002] Rare earth smelting magnesium sulfate wastewater is usually treated by evaporation crystallization or lime neutralization in industry, and the evaporation cost of evaporation crystallization process is high, and although the cost of lime neutralization magnesium sulfate wastewater is low, a large amount of calcium sulfate and magnesium hydroxide mixed solid waste is generated, which increases the environmental protection pressure of enterprises, therefore, the development of low-cost and resourceful treatment process of magnesium sulfate wastewater is particularly important, and the design of magnesium sulfate wastewater resource treatment device is the basis of process development. Conventional stirring reaction tank directly generates calcium sulfate and magnesium hydroxide mixed slag, and the morphology of calcium sulfate is short rod, and it is sea urchin-like agglomeration symbiosis with magnesium hydroxide, therefore, the reactor design for realizing the differential growth of calcium sulfate crystal and magnesium hydroxide crystal is increasingly concerned, and the invention patent with authorization number CN105858692 B discloses a method for treating magnesium sulfate and magnesium sulfite wastewater by lime method, the purified and oxidized wastewater and lime slurry are continuously added into reaction crystallizer respectively, the reaction crystallization conditions are controlled, the sulfate ions and calcium ions are combined to form large particle size calcium sulfate dihydrate crystals and are settled at the bottom of the reaction crystallizer, the magnesium ions and hydroxyl ions are combined to form small particle size magnesium hydroxide which is continuously overflowed from the overflow port of the reaction crystallizer. A circulating lifting device is arranged in the reaction crystallization barrel, the circulating lifting device is a mixer with turbine type paddle, the turbine type paddle is arranged in the bottom open slender cylinder, so that the liquid from the bottom of the reaction crystallization barrel can circulate upward in the barrel. However, the yield of magnesium hydroxide generated by reaction is not introduced, and the purity of calcium sulfate dihydrate obtained by separation is not more than 90%.

[0003] The utility model discloses a magnesium sulfate wastewater resource treatment device, which solves the agglomeration problem of calcium sulfate and magnesium hydroxide in the magnesium sulfate wastewater resource treatment process, makes the calcium sulfate crystals grow, improves the separation degree of calcium sulfate and magnesium hydroxide, improves the purity of the recovered calcium sulfate and magnesium hydroxide respectively, and provides the magnesium sulfate wastewater resource treatment device. UTILITY MODEL CONTENTS

[0004] The utility model discloses a magnesium sulfate wastewater resource treatment device, which solves the agglomeration problem of calcium sulfate and magnesium hydroxide in the magnesium sulfate wastewater resource treatment process, makes the calcium sulfate crystals grow, improves the separation degree of calcium sulfate and magnesium hydroxide, improves the purity of the recovered calcium sulfate and magnesium hydroxide respectively, and provides the magnesium sulfate wastewater resource treatment device.

[0005] To achieve the above-mentioned purpose, the utility model provides the following scheme: the utility model provides a kind of magnesium sulfate wastewater resource treatment device, comprising:

[0006] The reaction kettle includes a kettle body and an inner container, the inner container is fixed in the kettle body, and a settling zone is formed between the outer wall of the inner container and the inner wall of the kettle body, and a fluidization zone is formed between the top of the inner container and the top of the kettle body.

[0007] a defoaming system arranged at the top end of the kettle body;

[0008] an aeration system arranged at the bottom of the inner container, and the input end of the aeration system extends out through the kettle body;

[0009] a discharging system arranged at the bottom of the kettle body;

[0010] a heating system installed in the inner container;

[0011] wherein the upper and lower ends of the inner container are respectively fixedly connected with a feeding port, a plurality of sampling ports are vertically and equidistantly arranged on the outer wall of the kettle body, and the bottom of the kettle body is arranged in an inverted conical shape.

[0012] According to the magnesium sulfate wastewater resource treatment device, the defoaming system comprises a defoamer, the defoamer is fixed at the top of the kettle body, a bubble suction inlet is arranged at the top of the kettle body, a buffer zone is formed between the bubble suction inlet and the inner kettle body, and the input end of the defoamer is communicated with the buffer zone through the bubble suction inlet.

[0013] According to the magnesium sulfate wastewater resource treatment device, the aeration system comprises an aeration head, the aeration head is arranged below the inner container, a hard conduit is fixedly connected with the input end of the aeration head, and the hard conduit is communicated with a gas supply device.

[0014] According to the magnesium sulfate wastewater resource treatment device, the discharging system comprises a gas distribution ring, the gas distribution ring is fixed at the inner bottom of the kettle body, a discharging port is arranged at the inner bottom end of the kettle body, the gas distribution ring is arranged above the discharging port, a plurality of gas holes are equidistantly arranged on the gas distribution ring in a circumferential direction, and the gas distribution ring is connected with a gas source through a gas connection port.

[0015] According to the magnesium sulfate wastewater resource treatment device, an included angle is arranged between the axis of the gas hole and the inner wall of the kettle body, the included angle ranges from 0° to 90°, and the flow rate of the gas in the gas distribution ring ranges from 0 to 5 L / min.

[0016] According to the magnesium sulfate wastewater resource treatment device, the heating system comprises a heater, the heater is installed in the inner container, and the heater is electrically connected with a controller.

[0017] According to the magnesium sulfate wastewater resource treatment device, a temperature detection sensor is installed in the inner container.

[0018] According to the magnesium sulfate wastewater resource treatment device, a plurality of layers of grid nets are arranged in the buffer zone.

[0019] The utility model discloses the following technical effects:

[0020] The utility model discloses when working, the inside of cauldron body is filled with bottom liquid first, taking tap water as an example, bottom liquid adds to the upper edge of inner bag, adjusts heating system and makes bottom liquid heat to certain temperature, controls aeration flow through aeration system, and gas is evenly passed into the reaction kettle, and magnesium sulfate wastewater is fed from the feed port located below, and precipitant takes calcium hydroxide as an example and is fed from the feed port located above, and reaction starts, and fluid in the reaction kettle continuously turns over from the inner bag, forms fluidized state, opens the switch of discharge system, and continuously discharges, and the material at the bottom of cauldron carries out subsequent physical separation, and finally produces calcium sulfate and magnesium hydroxide.

[0021] The utility model discloses in the magnesium sulfate wastewater resource treatment process, through the fluid in cauldron body being driven by airflow and realizing fluidization, magnesium sulfate wastewater and precipitant are evenly mixed, avoid the generation of product agglomeration, realize the differential growth of calcium sulfate and magnesium hydroxide in the fluid field, provide favorable conditions for subsequent resource recovery of calcium sulfate and magnesium hydroxide. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawing needed to be used in the embodiments, and obviously, the drawing in the following description is only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creative labor.

[0023] Figure 1 It is the structural schematic diagram of the magnesium sulfate wastewater resource treatment device of the utility model.

[0024] 1, defoamer, 2, bubble suction port, 3, buffer zone, 4, fluidization zone, 5, reaction zone, 6, sedimentation zone, 7, heating system, 8, feed port, 9, aeration head, 10, gas distribution ring, 11, gas inlet, 12, discharge port, 13, sampling port, 14, cauldron body, 15, inner bag. DETAILED DESCRIPTION

[0025] The technical scheme in the embodiments of the utility model will be clearly and completely described in the following with the drawings in the embodiments of the utility model, and obviously, the described embodiments are only some embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.

[0026] In order to make the above-mentioned purpose, characteristics and advantages of the utility model more apparent, obvious and easy to understand, the utility model will be explained in further detail below in combination with the drawings and specific embodiments.

[0027] Referring to Figure 1 The utility model provides a magnesium sulfate wastewater resourceful treatment device, include:

[0028] The reaction kettle includes a kettle body 14 and an inner container 15, the inner container 15 is fixed in the kettle body 14, and a settling zone 6 is formed between the outer wall of the inner container 15 and the inner wall of the kettle body 14; the height-diameter ratio of the kettle body 14 and the inner container 15 is 8-15:1, and the setting of the inner container 15 can prolong the residence time of the crystal;

[0029] The defoaming system is arranged at the top end of the kettle body 14;

[0030] The aeration system is arranged at the bottom of the inner container 15, and the input end of the aeration system extends out through the kettle body 14, and a fluidization zone 4 is formed between the top of the inner container 15 and the top of the kettle body 14;

[0031] The discharge system is arranged at the bottom of the kettle body 14;

[0032] The heating system 7 is installed in the inner container 15;

[0033] The upper and lower ends of the inner container 15 are fixedly connected with a feed inlet 8, respectively, a plurality of sampling ports 13 are vertically and equidistantly arranged on the outer wall of the kettle body 14, and the bottom of the kettle body 14 is arranged in an inverted conical shape.

[0034] In the embodiment, the inner container 15 is internally provided with a reaction zone 5, the feed inlet 8 is arranged at different positions according to different raw materials, the upper part of the reaction zone 5 is provided with a precipitant feed inlet 8, and the lower part of the reaction zone 5 is provided with a magnesium sulfate wastewater feed inlet 8. The main purpose is to reduce the instantaneous high salt concentration, so as to avoid the generation of a large amount of small particle size calcium sulfate.

[0035] The uppermost sampling port 13 is flush with the top end of the inner container 15.

[0036] During the working of the utility model, the kettle body 14 is first filled with a bottom liquid, for example, tap water, the bottom liquid is added to the upper edge of the inner container 15, the heating system 7 is adjusted to heat the bottom liquid to a certain temperature, the aeration flow is controlled through the aeration system, the gas is uniformly introduced into the reaction kettle, the magnesium sulfate wastewater is fed from the lower feed inlet 8, the precipitant is fed from the upper feed inlet 8, for example, calcium hydroxide, the reaction starts, the fluid in the reaction kettle continuously turns over from the inner container 15, forms a fluidized state, the discharge system switch is opened, continuous discharge is realized, the kettle bottom material is subjected to subsequent physical separation, and finally calcium sulfate and magnesium hydroxide are produced.

[0037] The utility model discloses a magnesium sulfate wastewater resource treatment process, through the fluid in the kettle body 14 driven by airflow realizes fluidization, magnesium sulfate wastewater and precipitant are mixed evenly, avoid the generation product reunion, realize the differentiation growth of calcium sulfate and magnesium hydroxide in the fluid field, provide favorable conditions for subsequent resource recovery calcium sulfate and magnesium hydroxide.

[0038] Further optimization scheme, the defoaming system includes defoamer 1, and defoamer 1 is fixed at the top of kettle body 14, and the top of kettle body 14 is provided with bubble suction inlet 2, and buffer zone 3 is formed between bubble suction inlet 2 and inner kettle body 14, and the input end of defoamer 1 is communicated with buffer zone 3 through bubble suction inlet 2.

[0039] Further optimization scheme, the aeration system includes aeration head 11, and aeration head 9 is arranged below inner container 15, and the input end of aeration head 9 is fixedly connected with rigid conduit, and the rigid conduit is communicated with gas supply device.

[0040] Further optimization scheme, the discharge system includes gas distribution ring 10, and gas distribution ring 10 is fixed at the inner bottom of kettle body 14, and the inner bottom end of kettle body 14 is provided with discharge port 12, and gas distribution ring 10 is arranged above discharge port 12, and a plurality of gas holes are equidistantly arranged on the circumference of gas distribution ring 10, and gas distribution ring 10 is externally connected with gas source through gas connection port 11.

[0041] Further optimization scheme, the included angle between the axis of gas hole and the inner wall of kettle body 14 is arranged, and the included angle ranges from 0 to 90 degrees, and the gas flow rate in gas distribution ring 10 is 0-5L / min.

[0042] Further optimization scheme, heating system 7 includes a heater, and the heater is installed in inner container 15, and the heater is electrically connected with controller.

[0043] Further optimization scheme, temperature detection sensor is installed in inner container 15.

[0044] Further optimization scheme, a plurality of layers of grid nets are arranged in buffer zone 3. Buffer zone 3 is shaped as inverted trapezoid, and buffer space is provided for bubble overflow, and the arrangement of multiple layers of grid nets can preliminarily defoam.

[0045] In the description of the utility model, it is understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the utility model, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0046] The above-described embodiments are merely preferred modes of the present application, and are not intended to limit the scope of the present application, and various modifications and improvements to the technical solutions of the present application made by those of ordinary skill in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application as defined by the claims.

Claims

1. A device for the resource-based treatment of magnesium sulfate wastewater, characterized in that, include: The reactor includes a vessel body (14) and an inner liner (15). The inner liner (15) is fixed inside the vessel body (14), and a settling zone (6) is formed between the outer wall of the inner liner (15) and the inner wall of the vessel body (14). A fluidization zone (4) is formed between the top of the inner liner (15) and the top of the vessel body (14). A defoaming system is provided at the top of the vessel body (14); An aeration system is provided at the bottom of the inner liner (15), and the input end of the aeration system extends through the vessel body (14); A discharge system is provided at the bottom of the vessel body (14); A heating system (7) is installed inside the inner liner (15); The inner liner (15) is fixedly connected to the upper and lower ends of the feed inlet (8), and the outer wall of the vessel body (14) is provided with several sampling ports (13) at equal intervals in the vertical direction. The bottom of the vessel body (14) is set as an inverted cone shape.

2. The magnesium sulfate wastewater resource utilization treatment device according to claim 1, characterized in that: The defoaming system includes a defoamer (1), which is fixed on the top of the vessel body (14). The top of the vessel body (14) has a bubble inlet (2), and a buffer zone (3) is formed between the bubble inlet (2) and the interior of the vessel body (14). The input end of the defoamer (1) is connected to the buffer zone (3) through the bubble inlet (2).

3. The magnesium sulfate wastewater resource utilization treatment device according to claim 1, characterized in that: The aeration system includes an aeration head (9), which is located below the inner liner (15), and the input end of the aeration head (9) is fixedly connected to a rigid conduit, which is connected to an air supply device.

4. The magnesium sulfate wastewater resource utilization treatment device according to claim 1, characterized in that: The discharge system includes a gas distribution ring (10), which is fixed to the bottom of the vessel body (14). The bottom of the vessel body (14) has a discharge port (12). The gas distribution ring (10) is located above the discharge port (12). The gas distribution ring (10) has several air holes evenly spaced around it. The gas distribution ring (10) is connected to an external gas source through an air inlet (11).

5. The magnesium sulfate wastewater resource utilization treatment device according to claim 4, characterized in that: An angle is provided between the axis of the vent and the inner wall of the vessel body (14), and the angle ranges from 0° to 90°. The gas flow rate in the gas distribution ring (10) is 0-5 L / min.

6. The magnesium sulfate wastewater resource utilization treatment device according to claim 1, characterized in that: The heating system (7) includes a heater installed inside the inner liner (15) and electrically connected to a controller.

7. The magnesium sulfate wastewater resource utilization treatment device according to claim 1, characterized in that: A temperature detection sensor is installed inside the inner liner (15).

8. The magnesium sulfate wastewater resource utilization treatment device according to claim 2, characterized in that: The buffer zone (3) is provided with several layers of grid.

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