Spiral chute pickling calcium removal device

Abstract

The utility model provides a spiral chute pickling calcium removal device which comprises a solid-liquid separation device, an acid liquor circulation device and a control device. The solid-liquid separation device comprises a filtrate tank, a vacuum pump is arranged beside the filtrate tank, filter cloth is arranged above the filtrate tank, and a scraper blade capable of automatically operating is arranged above the filter cloth; the acid liquor circulating device comprises an acid liquor storage tank, the acid liquor storage tank is connected with the filtrate pool through a pipeline and a one-way valve, and an acid liquor pump is arranged beside the acid liquor storage tank. And the control device can automatically control the circulation volume of the acid liquor and the automatic operation of the scraper on the filter cloth. The spiral chute cleaning device can timely separate scale bodies from pickling solution after pickling and softening of the spiral chute, effectively reduces consumption of acid liquor in the pickling process, can guarantee that the acid liquor is fully distributed on the surface of the spiral chute by accurately controlling the flow of the pickling solution, and guarantees the cleaning effect.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of mineral processing, and particularly relates to a spiral chute pickling calcium removal device. BACKGROUND

[0002] Heavy and floating combined separation is a new mineral processing technology for phosphate ore processing, and a heavy and floating combined separation method for medium and low grade collophanite is disclosed in CN105880032A, and a combined process composed of spiral chute gravity separation and flotation is also disclosed, and the separation effect is good. In the flotation process of phosphate ore processing, pH adjusting agent, flotation collector and other flotation reagents are added. The part of the equipment in contact with the ore pulp is prone to calcium precipitation. Calcium precipitation on the surface of the spiral chute can greatly affect the separation effect of the spiral chute, and even cause the spiral chute to fail. The separation effect of the heavy and floating combined process is greatly deteriorated. As for the method for cleaning the calcium precipitation on the surface of the spiral chute, a high-pressure water gun is commonly used for washing, but the efficiency is very low. The calcium precipitation on the surface of the chute is relatively close, and it is difficult to clean with the high-pressure water gun. Another method is to use acid solution for pickling to dissolve and soften the calcium precipitation on the surface of the spiral chute, but there is no suitable pickling circulation equipment at present. SUMMARY

[0003] The spiral chute pickling calcium removal device can effectively reduce the consumption of acid solution in the pickling process, and can ensure the cleaning effect through accurate pickling liquid flow control.

[0004] The technical scheme of the utility model provides a spiral chute pickling calcium removal device. The outlet of the filtrate tank is connected with the inlet of the acid solution storage tank, the outlet of the acid solution storage tank is connected with the pickling liquid distributor after passing through the spiral chute, the pickling liquid distributor is arranged above the filtrate tank and the filter cloth, the pickling liquid distributor has one inlet and multiple outlets, the outlets are uniformly distributed above the filter cloth, and the pickling liquid is distributed on the filter cloth in the form of multiple flows.

[0005] A vacuum pump is arranged beside the filtrate tank, a filter cloth is arranged above the filtrate tank, the filtrate tank and the filter cloth are tightly attached, and the cross section of the filter cloth is U-shaped, so that the pickling liquid cannot leak from the side.

[0006] A reciprocating scraper assembly is arranged above the filter cloth to realize reciprocating movement of the scraper on the filter cloth.

[0007] A liquid level sensor and a vacuum pressure gauge are arranged in the filtrate tank to monitor the liquid level and pressure in the filtrate tank.

[0008] A one-way valve and a pipeline pump are arranged on the connecting pipeline between the outlet of the filtrate tank and the inlet of the acid solution storage tank.

[0009] The acid solution storage tank is connected with the pickling liquid distributor through a pickling pump, a flow meter is arranged on the connecting pipeline, and a pH meter is arranged on the acid solution storage tank.

[0010] The acid liquid storage tank is provided with a concentrated acid storage tank, and an electromagnetic valve is arranged at the outlet of the concentrated acid storage tank.

[0011] The utility model has the following beneficial effects:

[0012] 1、The spiral chute pickling calcium removal device, the acid liquid of mixed scale body in the spiral chute pickling process first passes through filter cloth, separates scale body and acid liquid in time, avoids further reaction, and reduces pickling liquid consumption.

[0013] 2、The spiral chute pickling calcium removal device can automatically control and adjust pickling circulating flow in the pickling process, ensures that pickling liquid covers the entire spiral chute surface in the circulating process, and ensures cleaning effect.

[0014] 3、The spiral chute pickling calcium removal device is provided with a pH meter in the acid liquid storage tank, the pickling liquid pH value is monitored in real time in the pickling process, the pickling liquid pH value is controlled in the optimum interval, and cleaning efficiency is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0015] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained according to these drawings without creative labor.

[0016] Figure 1 It is the structure schematic diagram of the spiral chute pickling calcium removal device of the utility model.

[0017] BRIEF DESCRIPTION OF DRAWINGS: 1, filtrate pool, 2, acid liquid storage tank, 3, concentrated acid storage tank, 4, vacuum pump, 5, filter cloth, 6, scraper assembly, 7, pickling liquid distributor, 8, check valve, 9, pipeline pump, 10, pickling pump, 11, liquid level sensor, 12, pH meter, 13, electromagnetic valve, 14, flowmeter, 15, vacuum pressure gauge. DETAILED DESCRIPTION

[0018] The embodiment of the utility model will be described in detail in combination with the embodiment, but those skilled in the art will understand that the following embodiment is only used to illustrate the utility model, and should not be regarded as limiting the scope of the utility model.

[0019] As Figure 1The utility model discloses a spiral chute pickling calcium removing device. Including solid -liquid separation device, acid liquor circulating device, control device. Solid -liquid separation device includes filtrate pool 1, and the vacuum pump 4 is provided with in the side of filtrate pool 1, and the filter cloth 5 is provided with above filtrate pool 1, and the reciprocating operation's scraper assembly 6 and pickling liquid distributor 7 are provided with above filter cloth 5;Acid liquor circulating device includes acid liquor storage tank 2, and the pipeline connection of acid liquor storage tank 2 and filtrate pool 1, and pickling pump 10 and concentrated acid storage tank 3 are provided with in the side of acid liquor storage tank 2. Control device includes pickling flow control, filtrate pool 1 liquid level control, and acid liquor storage tank 2 pH value control.

[0020] Preferably, the filtrate pool 1 and the filter cloth 5 are tightly fitted, and the filter cloth 5 is U-shaped in cross section, ensuring that the acid liquid does not leak from the side.

[0021] Preferably, the acid liquor storage tank 2 and the filtrate pool 1 connecting pipeline are provided with a one-way valve 8 and a pipeline pump 9. Ensure that the acid in the acid liquor storage tank 2 does not flow back to the filtrate pool 1.

[0022] Preferably, the control device can be provided with a liquid level sensor 11, a vacuum pressure gauge 15 in the filtrate pool 1, a pH meter 12 in the acid liquor storage tank 2, a flow meter 14 at the outlet of the pickling pump 10, and an electromagnetic valve 13 at the outlet of the concentrated acid storage tank 3. More preferably, a PLC controller and a man-machine interface are provided, the signal output port of the liquid level sensor 11 is connected to the input port of the controller, the output port of the controller is connected to the pipeline pump 9, and the controller controls the liquid level of the filtrate pool 1 to be stable through the input signal of the sensor. The signal output port of the pH meter 12 is connected to the input port of the controller, the output port of the controller is connected to the electromagnetic valve 13, and the controller controls the pH value of the acid liquor storage tank 2 to be stable through the input signal of the sensor. The signal output port of the flow meter 13 is connected to the input port of the controller, and the output port of the controller is connected to the pickling pump 10.

[0023] In actual use, only the cleaning time is set on the control device, the control device opens the electromagnetic valve 13, the acid liquid in the concentrated acid storage tank 3 is injected into the acid liquor storage tank 2, and then is delivered to the spiral chute to be cleaned through the pickling pump 10. By controlling the change of the flow of the pickling liquid, the pickling liquid can cover the inner edge of the spiral chute at low flow and can cover the outer edge of the spiral chute at high flow, thereby ensuring that the pickling liquid can completely cover the calcium on the surface of the spiral chute, thereby reacting with the calcium to achieve calcium removal. After the calcium on the surface of the chute reacts with the acid, it softens and falls off, and is evenly distributed on the surface of the filter cloth through the distributor 7 after the pickling liquid passes through the distributor 7, realizing solid-liquid separation and avoiding further reaction of the calcium with the acid to cause excessive consumption of the acid. The filtered pickling liquid enters the acid liquor storage tank 2 from the filtrate pool 1 for circulation. The control system continuously supplements the acid in the concentrated acid storage tank 3 to the acid liquor storage tank 2 according to the pH meter, ensuring that the acid concentration of the acid liquor storage tank 2 meets the pickling requirements and ensuring the pickling effect.

[0024] The above examples are only for illustrating the technical thought and characteristics of the utility model, and the content is only the preferred embodiment of the utility model, but the protection scope of the utility model is not limited to this. Within the technical range disclosed by the utility model, equivalent changes or improvements according to the technical scheme and utility model concept of the utility model should be covered in the protection scope of the utility model.

Claims

1. A spiral chute acid washing and calcium removal device, characterized in that, The outlet of the filtrate tank is connected to the inlet of the acid storage tank, and the outlet of the acid storage tank is connected to the pickling solution distributor. The pickling solution distributor is located at the top of the filtrate tank and allows the pickling solution to enter the filtrate tank in multiple flow rates.

2. The spiral chute acid washing and calcium removal device according to claim 1, characterized in that, A vacuum pump is installed next to the filtrate tank, and a filter cloth is installed above the filtrate tank. The filtrate tank and the filter cloth are tightly fitted together, and the cross-section of the filter cloth is U-shaped to ensure that the pickling solution will not leak from the side.

3. The spiral chute acid washing and calcium removal device according to claim 2, characterized in that, A reciprocating scraper assembly is installed above the filter cloth, enabling the scraper to reciprocate on the filter cloth.

4. The spiral chute acid washing and calcium removal device according to claim 1, characterized in that, The filtrate tank is equipped with a liquid level sensor and a vacuum pressure gauge for monitoring the liquid level and pressure within the tank.

5. The spiral chute acid washing and calcium removal device according to claim 1, characterized in that, A check valve and a pipeline pump are installed on the connecting pipe between the outlet of the filtrate tank and the inlet of the acid storage tank.

6. The spiral chute acid washing and calcium removal device according to claim 5, characterized in that, The acid storage tank is connected to the acid pickling solution distributor via an acid pickling pump. A flow meter is installed on the connecting pipeline, and a pH meter is installed in the acid storage tank.

7. The spiral chute acid washing and calcium removal device according to claim 5, characterized in that, The acid storage tank is equipped with a concentrated acid storage tank, and a solenoid valve is installed at the outlet of the concentrated acid storage tank.

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