A gas separator

Abstract

This invention discloses a gas separator. Based on a rectangular box, the separator has gas phase exhaust ports and slurry outlets distributed on the upper and lower sides of the relatively long side of the box. A backflushing mixture inlet is welded to one end of the box near the gas phase exhaust ports and slurry outlets. The box interior is also designed with vertical baffles, windbreaks, arc-shaped doors, and a guide plate. These multiple interceptions ensure that compressed air is discharged from the gas phase exhaust ports, and the slurry flows smoothly back into the slurry tank. The gas separator provided by this invention has advantages such as simple structure, novel design, and strong operability, completely solving many problems related to compressed air backflushing and slurry recirculation, and improving enterprise production efficiency.

Description

Technical Field

[0001] This invention relates to a tool used in the solid-liquid separation industry for back-blowing slurry in filter presses to separate the slurry from the compressed gas. It is installed on the slurry return pipeline, close to the slurry tank. Background Technology

[0002] A filter press is a general-purpose solid-liquid separation device widely used in the chemical, pharmaceutical, dye, brewing, ceramic, and environmental protection industries. The filtration mechanism is the core of the filter press, mainly composed of a thrust plate (feed), filter plates, filter cloth, and a pressing plate (pressing). The filter plates and filter cloth are the main filtration elements. The material to be filtered enters the filter plate chamber through the feed hole. Solids are trapped in the chamber by the filter cloth, forming a filter cake, while the liquid passes through the filter cloth and is discharged through the pipe, forming filtrate, which is then collected. The feed hole serves as the channel for material to enter the filter chamber. After feeding, some slurry (material) remains in the feed hole channel. The usual practice is to use compressed air to blow the slurry that has not formed a filter cake back into the slurry tank.

[0003] In different industries, the operating conditions vary, and the time for purging the feed channel (back-blowing) is generally set to (15-30) seconds, while the instantaneous consumption of compressed air is generally (10-50) m³ / s. 3 The air pressure is typically between 0.6 and 0.8 MPa per minute. Generally, the filter press backflush pipe is directly connected to the slurry tank. However, due to the short purging time, high pressure, and large instantaneous air volume in the feed channel, directly connecting the filter press backflush pipe to the slurry tank can cause the following problems: 1. When the slurry tank level is high, compressed air enters the tank and releases pressure on the slurry surface, causing the slurry to be blown out, resulting in environmental pollution and slurry waste; 2. The release of pressure by the compressed air generates significant noise; 3. The slurry in the backflush channel is a mixture of solid particles, liquid water, and compressed air. The release of pressure by the compressed air at the top of the slurry tank causes unstable airflow in the confined space, which can easily lead to an explosion, especially in explosion-proof workshops. Summary of the Invention

[0004] The purpose of this invention is to overcome the defects of slurry reflux in existing filter press backflushing, solve the corresponding technical problems, and provide a gas separator that solves many problems caused by the release pressure of compressed air, realizes the separation of compressed air and slurry, allows the slurry to automatically and smoothly flow back into the slurry tank, and safely guides the compressed air to the outside for discharge through the gas phase exhaust pipe.

[0005] The technical solution adopted by the present invention to solve the aforementioned technical problem is as follows: a gas separator, which is made of several steel plates welded into a rectangular box, and channel steel is welded around the bottom of the box to form a safety base; on the outer surface of the rectangular box, the upper and lower relatively long outer surfaces are distributed with gas phase exhaust ports and slurry outlets, and then a backflush mixture inlet is welded to one end face of the box near the gas phase exhaust port and slurry outlet; inside the rectangular box, there are wind baffles, arc-shaped doors, flow guide bottom plates, slurry baffles, and vertical partitions. Through the different internal structures of the box, the separation of compressed air and slurry in the backflush mixture is achieved.

[0006] Furthermore, the gas separator, from its appearance, is a rectangular box. Flange-connected pipe outlets are designed on three outer surfaces of the box: a gas phase exhaust port, a slurry outlet, and a backflushing mixture inlet. The gas phase exhaust port and slurry outlet are located on the upper and lower sides of the relatively longer rectangular box, with the gas phase exhaust port at the top and the slurry outlet at the bottom, following the natural law that gas, being lighter, floats on top of the liquid. The distance from the center axis of the two pipe outlets to the box wall is approximately one-sixth of the total length of the rectangular box. The gas phase exhaust port is closer to the box wall than the box wall itself, while the slurry outlet is closer to the guide plate, with a distance of approximately 100 millimeters between them. They are arranged alternately, with the slurry outlet closer to the guide plate for better slurry discharge. Near... One end face of the gas phase exhaust port and slurry outlet is designed with a backflush mixture inlet (backflush mixture inlet). The backflush mixture inlet pipe extends into the rectangular box, occupying approximately one-third of the internal length of the rectangular box. 30 mm from the end of the backflush mixture inlet pipe extending into the box, a vertical baffle is fully welded. The vertical baffle is welded to the top, left, and right sides of the box interior, leaving a gap one-fifth of the box height between it and the bottom plate. This gap allows the separated slurry to pass underneath and flow into the slurry outlet, while also allowing the backflowing mixed compressed air (mixed gas) to pass through. The vertical baffle not only prevents the dispersed backflush mixture from entering the semi-enclosed area but also prevents the mixed gas impacted and splashed back by the wind baffle from entering the semi-enclosed area. The so-called semi-enclosed area is the space at the right end of the vertical baffle, which is formed by… Figure 1 It can be seen that the gas phase exhaust pipe, the slurry outlet pipe, and the backflushing mixture feed pipe are all located at the same place.

[0007] Furthermore, the baffle is designed inside the housing and is a vertically placed steel plate welded to the top, left, and right sides of the housing. The baffle is located behind the backflushing mixture pipe, with the space behind the backflushing mixture pipe as the reference. The baffle is located at one-third of the length of the space, behind the vertical partition, and is arranged parallel to the vertical partition. The height of the baffle is about half of the total internal height of the housing. It extends from the top of the housing down to the center line of the backflushing mixture inlet and stops, blocking part of the backflushing mixture and reducing the flow rate of the backflushing mixture.

[0008] Furthermore, inside the rectangular housing, at two-thirds of the space behind the backflushing mixture pipe, there is an arc-shaped door. The arc-shaped door is a vertical steel plate, perpendicular to the bottom of the housing, with its bottom welded to the guide plate and its left and right sides welded to the left and right sides of the housing. The top of the arc-shaped door extends beyond one-third of the bottom of the baffle plate. A semi-circular doorway is opened at the center of the bottom of the arc-shaped doorway, with the height of the semi-circular doorway being two-fifths of the total height of the steel plate, to facilitate the passage of compressed air and slurry.

[0009] Furthermore, inside the rectangular housing, directly below the gas phase exhaust duct, an arc-shaped steel plate is welded onto the backflushing mixture feed duct. Several arc-shaped steel plates form a circle, with the inner diameter of the circle being 1.75 times the diameter of the gas phase exhaust duct, smaller than the diameter of the backflushing mixture feed duct, and 5 cm higher than the bottom of the gas phase exhaust duct. The entire circle formed by the arc-shaped steel plates serves as a slurry baffle. The slurry baffle performs the final separation of the mixed gas. Most of the rising mixed gas encounters the slurry baffle in the circle and needs to adjust its direction, turning back into the gas phase exhaust duct. This causes the airflow discharge speed to decrease, reducing the noise level during airflow discharge. It also prevents some slurry from entering the gas phase exhaust duct and being discharged with the compressed gas.

[0010] Furthermore, inside the rectangular box, in the space behind the backflush mixture feed pipe, a steel plate inclined to the bottom surface of the box is welded as a guide plate for the slurry. The starting position of the guide plate coincides with the surface of the vertical partition. The guide plate is at an 8° angle to the bottom surface of the box and is firmly welded. The guide plate is fully welded to the three sides (left, right and rear) of the rectangular box wall, so that the separated slurry can slide smoothly down from the guide plate and enter the slurry outlet.

[0011] The gas separator provided by this invention has the advantages of simple structure, exquisite construction, and strong operability. It improves the utilization rate of slurry filling, reduces slurry waste, reduces the decibel of noise generated by compressed air release, improves enterprise safety and production efficiency, and enhances the economic benefits of enterprises. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of a gas separator according to the present invention.

[0013] Figure 2 This is a schematic diagram of the arc-shaped gate of a gas separator according to the present invention.

[0014] Attached reference numerals: 1-Rectangular box, 2-Wind baffle, 3-Vertical partition, 4-Gas phase exhaust port, 5-Slurry baffle, 6-Backflush mixture inlet, 7-Backflush mixture inlet pipe, 8-Slurry outlet, 9-Guide bottom plate, 10-Arched door, 11-Base, 12-Semi-circular doorway.

[0015] Backflush mixture: compressed air and slurry without any impact separation; mixed gas: slurry + compressed air after one impact separation (a small portion of slurry + compressed air); compressed gas: gas discharged after being intercepted by the slurry baffle. Detailed Implementation

[0016] The technical solutions of the present invention will be described below with reference to the accompanying drawings of an embodiment of a gas separator. The described embodiments are only a portion of preferred embodiments of the present invention, and not all embodiments. All other embodiments without inventive step made by those skilled in the art based on the embodiments of the present invention are within the protection scope of the present invention. Example

[0017] A gas separator is based on a rectangular box 1, with channel steel welded around the bottom of the box to form a safety base 11. Vertical partitions 3, a guide plate 9, a baffle 2, an arc-shaped door 10, and a slurry baffle 5 are designed inside the box. A gas phase exhaust port 4, a backflushing mixture inlet 6, and a slurry outlet 8 are all welded to the box wall, and a flange outlet is connected to a pipeline. The gas separator is installed on the return pipeline of the filter press slurry. When the filter press backflushes, compressed air blows through the filter plate inlet holes, and the slurry inside the filter plate inlet holes is entrained by the compressed air and enters the backflushing mixture. The material feed inlet 6 returns to the slurry tank; the backflushing mixture entering the gas separator (box) is divided into five parts. Due to inertia and blowing force, one part directly impacts the wind baffle 2, another part of the backflushing mixture disperses and impacts the vertical baffle 3, and a small part of the mixed gas that impacts the vertical baffle is the gas mixture that is sprayed back onto the vertical baffle after impacting the wind baffle. One part impacts the steel plate above the arc-shaped door 10 without a semi-circular doorway, and another part of the backflushing mixture bypasses the wind baffle and arc-shaped door with the airflow, passes through their gaps, and impacts the box wall. The remaining backflushing mixture passes through the semi-circular opening of the arc-shaped door and impacts the chamber wall. These five impacts successfully separate the backflushing mixture. Each impact is accompanied by a slowdown in airflow velocity and the slurry being released from the compressed air. The slurry in the backflushing mixture is separated by impacts from the vertical baffle, air baffle, arc-shaped door, and chamber wall, and flows smoothly down from the guide plate 9, passing through the semi-circular opening 12 of the arc-shaped door and entering the slurry outlet 8. The separated mixed gas, carrying a small amount of slurry, passes through the gap between the vertical baffle 3 and the guide plate 9 and accumulates in the backflushing mixture. Below the mixture feed pipe 7, above the slurry outlet 8, as the slurry is continuously released, most of the mixed gas flows from all directions to the gas phase exhaust port 4. When entering the gas phase exhaust port, it is intercepted by the slurry baffle 5, which forces the mixed gas to change direction and slows down the flow speed. After the mixed gas rises, it overflows the slurry baffle and then turns back into the gas phase exhaust port. During this process, the slurry baffle intercepts a small portion of the slurry in the mixed gas, forcing the mixed gas to be separated again. The compressed gas discharged is purer, which is beneficial to environmental beautification.

Claims

1. A gas separator, characterized in that: A rectangular box is welded from several steel plates. Inside the box, there are wind baffles, arc doors, flow guide plates, slurry baffles, and vertical partitions. Channel steel is welded around the bottom of the box to form a safety base. The box has flanged pipe outlets on three sides: gas phase exhaust port, slurry outlet, and backflushing mixture inlet.

2. A gas separator according to claim 1, characterized in that, On the outer surface of the box, the gas phase exhaust port and slurry outlet are designed on the upper and lower sides of the relatively long rectangular box, with the gas phase exhaust port on the upper side and the slurry outlet on the lower side. Then, the backflushing mixture inlet is welded to one end of the box near the gas phase exhaust port and slurry outlet. The distance from the central axis of the gas phase exhaust port and slurry outlet to the box wall is one-sixth of the length of the entire rectangular box. The gas phase exhaust port is close to the box wall, and the slurry outlet is close to the guide plate. The backflushing mixture inlet pipe extends into the rectangular box, occupying one-third of the internal length of the rectangular box.

3. A gas separator according to claim 1, characterized in that, Inside the rectangular housing, two-thirds of the space behind the backflushing mixture pipe is designed with an arc-shaped door. The arc-shaped door is a vertical steel plate, perpendicular to the bottom of the housing, with its bottom welded to the guide plate and its left and right sides welded to the left and right sides of the housing. The top of the arc-shaped door extends beyond one-third of the bottom of the baffle plate. A semi-circular doorway is opened at the center of the bottom of the arc-shaped doorway, with the height of the semi-circular doorway being two-fifths of the total height of the steel plate, to facilitate the passage of compressed air and slurry.

4. A gas separator according to claim 1, characterized in that, Inside the rectangular box, behind the backflow mixing feed pipe, a guide plate inclined to the bottom of the box is welded. The starting position of the guide plate coincides with the surface of the vertical partition. The guide plate is at an 8° angle to the bottom of the box and is firmly welded. The guide plate is fully welded to the three sides of the rectangular box wall.

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