Continuous pulping system

Abstract

The utility model relates to a continuous pulping system, which is characterized in that a feed port of a screw feeder (2) is connected with a star-shaped unloader (1), a high-speed pulping machine (3) is correspondingly arranged below a discharge port of the screw feeder (2), one side of the upper part of the high-speed pulping machine (3) is connected with a water inlet pipe (4), and a bottom outlet of the high-speed pulping machine (3) is connected with an inlet of a pulp filter (7) through a connecting pipe. A filter residue outlet of the pulp filter (7) is connected with the belt conveyor (8), and a filtrate outlet of the pulp filter (7) is connected into the pulping tank (9). The high-speed pulping machine is adopted for pulping, the water inlet amount is controlled through the electromagnetic regulating valve and the electromagnetic flowmeter, and then the pulp filter is used for filtering, so that dust is avoided, the problems of incomplete screen residue and poor production environment are solved, the utilization rate of carbide slag blocks is increased, and the neutralization cost is saved. The whole system is automatically controlled by a computer, operation is flexible, and continuous pulping operation is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of titanium dioxide production technology and equipment, specifically relating to a continuous pulping system. Background Technology

[0002] In the sulfuric acid process for titanium dioxide production, the acid neutralization step uses a slurry made from stone powder emulsion and carbide slag to neutralize concentrated and diluted wastewater. The daily supply of carbide slag is approximately 80 tons. Traditional pulping typically involves crushing, ball milling, and beating. On one hand, the grinding and digestion process generates small amounts of water vapor and dust that are released into the plant, reducing visibility and the working environment. On the other hand, the slurry is not finely ground, easily clogging pipes and affecting the normal operation of the production line. Furthermore, traditional processes have high power consumption and high construction costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a continuous pulping system.

[0004] To achieve the above objectives, the technical solution of this utility model is: a continuous pulping system, characterized in that: the feed inlet of the screw feeder is connected to a star-shaped unloader, a high-speed pulper is correspondingly arranged below the discharge outlet of the screw feeder, a water inlet pipe is connected to one side of the upper part of the high-speed pulper, the bottom outlet of the high-speed pulper is connected to the inlet of the filter press through a connecting pipe, the filter residue outlet of the filter press is connected to a belt conveyor, and the filtrate outlet of the filter press is connected to a pulping tank.

[0005] The inlet pipe is equipped with an electromagnetic flow meter and an electromagnetic regulating valve.

[0006] The motor of the high-speed pulper is driven by a frequency converter, and the spindle speed is not less than 360 rpm.

[0007] The slurry filter has a filtration capacity of >100m³ / h and a slurry particle size of 2-8mm.

[0008] The high-speed pulping machine is equipped with a low-voltage distribution cabinet, a control cabinet, a frequency converter cabinet, and a local control box. The low-voltage distribution cabinet is used for power supply during on-site maintenance. The control cabinet is connected to the DCS system to control the start and stop of the motors of the star unloader, screw feeder, high-speed pulping machine, pulp filter, and belt conveyor. The frequency converter cabinet is connected to the DCS system to control the frequency of each motor. The local control box is connected to the outgoing terminals of the control cabinet and the remote terminals of the DCS to realize the on-site and remote switching function.

[0009] The beneficial effects of this invention are as follows: It employs a high-speed pulper for pulping, controls the water inflow through an electromagnetic regulating valve and electromagnetic flow meter, and then filters the pulp using a filter press, thus avoiding dust generation, solving the problems of incomplete screening and poor production environment, improving the utilization rate of calcium carbide slag blocks, and saving neutralization costs. The entire system is automatically controlled by a computer, offering flexible operation and enabling continuous pulping. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the present invention;

[0011] In the diagram: 1-Star-shaped unloader, 2-Screw feeder, 3-High-speed pulper, 4-Water inlet pipe, 5-Electromagnetic flow meter, 6-Electromagnetic regulating valve, 7-Pulping machine, 8-Belt conveyor, 9-Pulping tank, 10-Low-voltage distribution cabinet, 11-Control cabinet, 12-Frequency converter cabinet, 13-Local control box. Detailed Implementation

[0012] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0013] See Figure 1 A continuous pulping system, characterized in that: the feed inlet of the screw feeder 2 is connected to the star-shaped unloader 1, a high-speed pulper 3 is correspondingly arranged below the discharge outlet of the screw feeder 2, a water inlet pipe 4 is connected to one side of the upper part of the high-speed pulper 3, the bottom outlet of the high-speed pulper 3 is connected to the inlet of the filter 7 through a connecting pipe, the filter residue outlet of the filter 7 is connected to the belt conveyor 8, and the filtrate outlet of the filter 7 is connected to the pulping tank 9.

[0014] The water inlet pipe 4 is equipped with an electromagnetic flow meter 5 and an electromagnetic regulating valve 6.

[0015] The high-speed pulper 3 motor is driven by a frequency converter, and the spindle speed is not less than 360 rpm.

[0016] The pulp filter 7 has a filtration capacity of >100m³ / h and a pulp particle size of 2-8mm.

[0017] The high-speed pulper 3 is surrounded by a low-voltage distribution cabinet 10, a control cabinet 11, a frequency converter cabinet 12, and a local control box 13. The low-voltage distribution cabinet 10 is used for on-site maintenance and repair power supply. The control cabinet 11 is connected to the DCS system to control the start and stop of the motors of the star unloader 1, the screw feeder 2, the high-speed pulper 3, the pulp filter 7, and the belt conveyor 8. The frequency converter cabinet 12 is connected to the DCS system to control the frequency of each motor. The local control box 13 is connected to the outgoing terminals of the control cabinet 11 and the DCS remote terminals to realize the on-site and remote switching function.

[0018] Working process: Calcium hydroxide, the raw material for pulping, is evenly conveyed to screw conveyor 2 through star-shaped unloader 1, and then conveyed to high-speed pulper 3 by screw conveyor 2. The feed rate of screw conveyor 2 is adjusted according to the pulping volume and concentration. Calcium hydroxide is mixed with water to prepare slurry through high-speed pulper 3. During this process, the water inlet is controlled by electromagnetic regulating valve 6 according to the data displayed by electromagnetic flowmeter 5. The slurry is then filtered into qualified slurry through pulp filter 7 and conveyed to pulping tank 9 for production use. The filtered calcium carbide slag is sent to the slag stacking area by belt conveyor 8 for re-pulping.

[0019] Pulping, filtering, and conveying are all automatically controlled by a computer, enabling continuous pulverization operations. In special circumstances, such as computer control system malfunction or temporary start / stop of a single unit, manual button control can be switched at any time. This flexible operation maximizes the continuity of grouting.

[0020] A low-voltage distribution cabinet 10 is installed on site for power supply during maintenance; a control cabinet 11 controls the motors of the star unloader 1, screw feeder 2, high-speed pulper 3, pulp filter 7, and belt conveyor 8, and controls the motor start and stop through DCS point control; the incoming terminals of the frequency converter cabinet 12 are for various electrical control lines, and speed, power, etc. are controlled through the frequency converter cabinet 12; the incoming terminals of the local control box 13 are connected to the outgoing terminals of the control cabinet 11 and the DCS remote terminals to realize the on-site and remote switching function.

Claims

1. A continuous pulping system, characterized in that: The feed inlet of the screw feeder (2) is connected to the star-shaped unloader (1). A high-speed pulper (3) is set below the discharge outlet of the screw feeder (2). A water inlet pipe (4) is connected to the upper side of the high-speed pulper (3). The bottom outlet of the high-speed pulper (3) is connected to the inlet of the filter press (7) through a connecting pipe. The filter residue outlet of the filter press (7) is connected to the belt conveyor (8). The filtrate outlet of the filter press (7) is connected to the pulping tank (9).

2. The continuous pulping system as described in claim 1, characterized in that: The inlet pipe (4) is equipped with an electromagnetic flow meter (5) and an electromagnetic regulating valve (6).

3. A continuous pulping system as described in claim 1, characterized in that: The high-speed pulper (3) uses a variable frequency drive motor with a spindle speed of not less than 360 rpm.

4. A continuous pulping system as described in claim 1, characterized in that: The pulp filter (7) has a filtration capacity of >100m / h and a pulp particle size of 2-8mm.

5. A continuous pulping system as described in claim 1, characterized in that: The high-speed pulper (3) is surrounded by a low-voltage distribution cabinet (10), a control cabinet (11), a frequency converter cabinet (12), and a local control box (13). The low-voltage distribution cabinet (10) is used for on-site maintenance power supply. The control cabinet (11) is connected to the DCS system to control the start and stop of the motors of the star unloader (1), screw feeder (2), high-speed pulper (3), pulp filter (7), and belt conveyor (8). The frequency converter cabinet (12) is connected to the DCS system to control the frequency of each motor. The local control box (13) is connected to the outgoing terminal of the control cabinet (11) and the DCS remote terminal to realize the on-site and remote switching function.

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