Centrifugal machine for solid-liquid-gas three-phase separation

Abstract

The utility model relates to the technical field of centrifugal machines, in particular to a centrifugal machine for solid-liquid-gas three-phase separation, which comprises a horizontal centrifugal machine body, a liquid outlet of the horizontal centrifugal machine body is communicated with the inlet end of a liquid discharge pipe, and the outlet end of the liquid discharge pipe is inserted into a gas-liquid separation tank from the lower portion of the side face of the gas-liquid separation tank in the tangential direction. A gas outlet is formed in the top of the gas-liquid separation tank, the gas outlet is communicated with a tail gas recovery device through a first negative pressure device, a fixing plate is arranged at the lower end of the gas-liquid separation tank, and a plurality of arc-shaped baffles which are distributed concentrically and are different in height are arranged on the fixing plate. The outlet end of the liquid discharge pipe is inserted into the gas-liquid separation tank from the lower part of the side surface of the gas-liquid separation tank along the tangential direction, so that mother liquid is promoted to form vortex in the gas-liquid separation tank to impact the arc-shaped baffle, and gas-liquid separation is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to centrifuge technical field, concretely relates to a centrifuge for solid -liquid gas three -phase separation. BACKGROUND

[0002] Centrifuge is the mechanical equipment of separating liquid and solid particle or liquid and liquid mixture in the centrifugal force.Centrifuge can be divided into the following three kinds according to the separation mode: sedimentation centrifuge, separation centrifuge and filtration centrifuge, wherein, sedimentation centrifuge is separated by the characteristics that solid particles of different densities or particle sizes have different sedimentation speeds in liquid, and the sedimentation centrifuge is simple in structure, easy to operate, suitable for separating a large number of samples, but the separation efficiency is relatively low, and the separation effect for small particles is poor;Separation centrifuge realizes material separation by centrifugal force and centrifugal field, and the separation centrifuge is compact in structure and high in separation efficiency, but the processing capacity is small and the equipment cost is high;The filtration centrifuge separates solid particles and liquid mainly through the filtration medium rotating at high speed, under the action of centrifugal force, solid particles are intercepted on the filtration medium, and liquid flows out through the filtration medium, and the filtration centrifuge has high separation efficiency and good separation effect, and is suitable for processing small particle samples, and is often used for separating crystal materials.

[0003] Ammonium sulfate is a commonly used chemical fertilizer and industrial raw material, which is widely used in chemical industry, metallurgy, fuel and agricultural fields.The preparation process of ammonium sulfate includes reaction method and evaporation crystallization method, wherein, the reaction method mainly includes neutralization method, gypsum method and recovery of sulfur dioxide from tail gas of sulfuric acid production to prepare ammonium sulfate;Evaporation crystallization method is to prepare ammonium sulfate crystal by using evaporation-cooling coupled crystallization process with crude ammonium sulfate as raw material.In the process of preparing ammonium sulfate by using reaction method or evaporation crystallization method, solid-liquid separation of mother liquor and ammonium sulfate crystal is needed, and the existing technology usually adopts horizontal centrifuge to centrifugally separate the mother liquor and ammonium sulfate crystal, and the solid obtained by centrifugal separation is directly dried in the dryer, and the liquid obtained by centrifugal separation is discharged out of the centrifuge through the screen gap and the small hole of the rotating drum.In the centrifugal separation process, the mother liquor will continuously impact the inner cavity of the centrifuge, resulting in a large amount of ammonia gas in the mother liquor, which will adversely affect the separation effect, and the residual ammonia gas in the liquid obtained by centrifugal separation will cause air and water pollution during discharge. UTILITY MODEL CONTENTS

[0004] In view of the technical problem that a large amount of ammonia gas is mixed in the mother liquor in the centrifugal separation process of ammonium sulfate, the utility model provides a centrifuge for gas-liquid separation, which inserts the outlet end of the liquid discharge pipe into the gas-liquid separation tank in the tangential direction from the lower part of the side surface of the gas-liquid separation tank, promotes the formation of vortex impact arc baffle in the gas-liquid separation tank, and realizes gas-liquid separation.

[0005] The utility model provides a kind of centrifuge for solid-liquid gas three-phase separation, including horizontal centrifuge body, the inner chamber one side of horizontal centrifuge body is rotatably connected with the driving end of drum, there is filter hole on the lateral wall of drum, the inner chamber bottom of horizontal centrifuge body is equipped with liquid phase collection groove, liquid phase collection groove is connected with the liquid outlet of horizontal centrifuge body, the liquid outlet of horizontal centrifuge body is connected with the inlet end of drain pipe, the outlet end of drain pipe is inserted into gas-liquid separation tank inside along tangent direction by the side lower portion of gas-liquid separation tank, the outlet end of drain pipe is provided with jet nozzle, the inner diameter of jet nozzle gradually reduces along liquid flow direction, gas outlet is set in the top of gas-liquid separation tank, gas outlet is connected with tail gas recovery device by first negative pressure device, the lower end of gas-liquid separation tank is provided with fixed plate, a plurality of arc baffle of same center distribution and different height are equipped on fixed plate, the opening of arc baffle faces the outlet end of drain pipe, the bottom of gas-liquid separation tank is equipped with liquid outlet;The inner chamber of horizontal centrifuge body is connected with tail gas recovery device by second negative pressure device.

[0006] Further, the inner wall of the drum is covered with a screen.

[0007] Further, the top of the gas-liquid separation tank is provided with a head, the head is a circular truncated cone structure with a small upper part and a large lower part, the side of the circular truncated cone structure is provided with a maintenance opening, and a first detachable sealing cover is arranged above the maintenance opening.

[0008] Further, the gas outlet is arranged on the upper end surface of the head, and a second detachable sealing cover is arranged above the gas outlet. After the second detachable sealing cover is removed, the gas outlet can be connected to the tail gas recovery device.

[0009] Further, the fixed plate is located below the outlet end of the drain pipe, and the fixed plate has a circular ring structure. The center of the fixed plate coincides with the center of the arc-shaped plate, and the inner radius of the fixed plate is not greater than the radius of the arc-shaped baffle.

[0010] Further, the center of the arc-shaped baffle is located on the axis of the gas-liquid separation tank.

[0011] Further, the arc-shaped baffles are equally spaced or closely arranged on the fixed plate. When the arc-shaped baffles are equally spaced on the fixed plate, the liquid surface on the outside of the vortex will continuously rise under the action of centrifugal force, and will overflow the arc-shaped baffles on the inside and collide with the arc-shaped baffles on the outside, thereby achieving gas-liquid separation. The separated liquid falls into the space between the adjacent two arc-shaped baffles and finally flows out of the inner circular outlet of the fixed plate. When the arc-shaped baffles are closely arranged on the fixed plate, the liquid surface on the outside of the vortex will continuously rise under the action of centrifugal force, and will collide with the arc-shaped baffles from the inside to the outside, which are arranged in a stepped manner with increasing height, thereby achieving gas-liquid separation. The separated liquid falls into the arc-shaped baffle with the smallest radius and falls into the inner circular outlet of the fixed plate.

[0012] Further, the height of the arc-shaped baffle gradually increases from inside to outside, and the arc-shaped baffle is distributed from inside to outside according to the radius from small to large.

[0013] Further, the central angles of the arc-shaped baffles are the same, and preferably 270º.

[0014] Further, the bottom of the gas-liquid separation tank is in a reverse conical structure, the reverse conical structure is below the fixed plate, and the bottom of the reverse conical structure is provided with a liquid outlet.

[0015] The beneficial effects of the utility model lie in:

[0016] The utility model provides a centrifugal machine for solid - liquid gas three - phase separation, through setting the drum in the inner chamber of horizontal centrifuge body, and setting the liquid phase collection groove in the inner chamber bottom of horizontal centrifuge body, utilize centrifugal action separation ammonium sulfate crystal and mother liquor, utilize second negative pressure device with tail gas recovery device intercommunication of horizontal centrifuge body, can in centrifugal separation ammonium sulfate crystal and mother liquor at the same time overflow ammonia gas in mother liquor and collect to tail gas recovery device, avoid the adverse effect that overflow ammonia gas brings to separation effect in centrifugal separation process, the utility model still sets up gas - liquid separation tank outside the liquid outlet of horizontal centrifuge body, and mother liquor can be injected into gas - liquid separation tank inside by the tangential direction from the lateral lower part of gas - liquid separation tank by liquid discharge pipe, forms vortex in gas - liquid separation tank inside, and ammonia gas in mother liquor moves to the central axis direction of vortex because of small density, and under the action of first negative pressure device, moves upward, and the liquid in mother liquor moves downward along the axial direction, and the liquid height of outward movement liquid increases with the distance between the central axis gradually increases, and collides with the arc-shaped baffle of different height distributed with the same center, and carries out gas - liquid separation again, and the liquid obtained by gas - liquid separation again falls to the lower side of gas - liquid separation tank under the action of gravity, and is discharged through liquid outlet. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the utility model, the following will briefly introduce the drawings needed to be used in the 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 also be obtained according to these drawings without paying creative labor.

[0018] Fig. 1 It is the inner chamber structure diagram of horizontal centrifuge body in example 1.

[0019] Fig. 2 It is the partial sectional view of gas - liquid separation tank in example 1.

[0020] Fig. 3 is a top view of the structure below the head of the gas-liquid separation tank in Example 1.

[0021] In the figure, 1 is the inner cavity of the horizontal centrifuge body, 2 is the first support seat, 3 is the first rotating shaft, 4 is the second support seat, 5 is the second rotating shaft, 6 is the rotating drum, 7 is the liquid phase collection groove, 8 is the liquid outlet of the horizontal centrifuge body, 9 is the liquid discharge pipe, 10 is the jet nozzle, 11 is the gas-liquid separation tank, 12 is the gas outlet, 13 is the fixed plate, 14 is the arc-shaped baffle, 15 is the liquid outlet, 16 is the head, 17 is the maintenance opening, 18 is the liquid phase outlet, 19 is the first fixed block, 20 is the second fixed block, 21 is the second negative pressure device, and 22 is the positioning plate. DETAILED DESCRIPTION

[0022] In order to make the purpose, characteristics and advantages of the utility model more obvious and easy to understand, the technical solutions in the utility model will be described clearly and completely below by combining the drawings in the specific embodiments. Obviously, the embodiments described below are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the patent, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the patent.

[0023] Example 1

[0024] A centrifuge for solid-liquid-gas three-phase separation, such as Figs. 1-3As shown, including horizontal centrifuge body (not shown in the figure), the left side of the inner cavity 1 of horizontal centrifuge body is fixed with first support seat 2, first support seat 2 is rotatably connected with first rotating shaft 3, the input end of first rotating shaft 3 is fixedly connected with the output end of driving motor (not shown in the figure), the output end of first rotating shaft 3 is fixedly connected with the driving end of rotary drum 6, rotary drum 6 is horizontally arranged in the form of cylinder, the driving end of rotary drum 6 is circular plane structure on the left side of rotary drum 6, driving motor can drive rotary drum to rotate, the right side of rotary drum 6 is provided with rotary drum cover, rotary drum cover is fixedly connected with second rotating shaft 5, feeding device (not shown in the figure) is arranged on rotary drum cover, second rotating shaft 5 is rotatably connected with second support seat 4, second support seat 4 is fixed on the right side surface of the inner cavity 1 of horizontal centrifuge body, the output end of driving motor, first rotating shaft 3 and second rotating shaft 5 are coaxially arranged. There are filter holes on the side wall of rotary drum 6, and the inner wall of rotary drum 6 is covered with a screen. The inner cavity 1 of horizontal centrifuge body is connected with tail gas recovery device (not shown in the figure) through second negative pressure device 21. The bottom of the inner cavity 1 of horizontal centrifuge body is provided with liquid phase collection groove 7 with U-shaped cross section, the liquid phase collection groove 7 is connected with the liquid outlet 8 of horizontal centrifuge body, the liquid outlet 8 of horizontal centrifuge body is connected with the inlet end of liquid discharge pipe 9, the outlet end of liquid discharge pipe 9 is inserted into the inside of gas-liquid separation tank 11 along the tangent direction from the lower part of the side surface of gas-liquid separation tank 11, the outlet end of liquid discharge pipe 9 is provided with jet nozzle 10, and the inner diameter of jet nozzle 10 gradually decreases along the liquid flow direction. The top of gas-liquid separation tank 11 is provided with head 16, the head 16 is circular truncated cone structure with small upper and large lower, the side surface of head 16 is provided with maintenance opening 17, the upper side of maintenance opening 17 is provided with first detachable sealing cover, the upper end surface of head 16 is provided with gas outlet 12, the gas outlet 12 is connected with tail gas recovery device through first negative pressure device (not shown in the figure), the upper side of gas outlet 12 is provided with second detachable sealing cover, after the second detachable sealing cover is removed, the gas outlet 12 can be connected with tail gas recovery device through first negative pressure device. The lower end of gas-liquid separation tank 11 is provided with fixed plate 13 with circular ring structure, the inner circle of fixed plate 13 is liquid phase outlet 18, and fixed plate 13 is located below the outlet end of liquid discharge pipe 9. A plurality of arc baffles 14 with central angle of 270º are arranged on the fixed plate 13 and distributed around the same center, the opening of arc baffle 14 faces jet nozzle 10, the center of arc baffle 14 coincides with the center of fixed plate 13, and the center of arc baffle 14 is located on the axis of gas-liquid separation tank 11.The arc-shaped baffles 14 are closely arranged on the fixed plate 13, the arc-shaped baffles 14 are distributed from inside to outside according to radii from small to large, the height of the arc-shaped baffles 14 gradually increases from inside to outside, the top of the arc-shaped baffles 14 with different radii is respectively fixedly connected with the lower surface of the corresponding positioning plate 22, wherein the positioning plate 22 arranged at the top of the outermost arc-shaped baffle 14 is fixed to the inner wall of the upper end of the gas-liquid separation tank 11, the upper surface of the positioning plate 22 arranged at the top of the outermost arc-shaped baffle 14 is respectively fixedly connected with the lower surface of the first fixed block 19 and the lower surface of the second fixed block 20 arranged orthogonally, the length of the first fixed block 19 and the second fixed block 20 is equal to the outer diameter of the outermost arc-shaped baffle. The positioning plate 22 arranged at the top of the other arc-shaped baffles 14 is fixed to the inner side surface of the arc-shaped baffle 14 adjacent to the outer side thereof. The radius of the liquid phase outlet 18 is smaller than the radius of the innermost arc-shaped baffle 14. The bottom of the gas-liquid separation tank 11 is in a reverse conical structure, the reverse conical structure is located below the fixed plate 13, and the bottom of the reverse conical structure is provided with the liquid outlet 15.

[0025] The above description of disclosed embodiments enables one of ordinary skill in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A centrifuge for solid-liquid-gas three-phase separation comprising a horizontal centrifuge body, characterized in that, The inner cavity of the horizontal centrifuge body is rotationally connected with the driving end of the drum, the sidewall of the drum has filter holes, the bottom of the inner cavity of the horizontal centrifuge body is provided with a liquid phase collection groove, the liquid phase collection groove is in communication with the liquid outlet of the horizontal centrifuge body, the liquid outlet of the horizontal centrifuge body is in communication with the inlet end of the liquid discharge pipe, the outlet end of the liquid discharge pipe is inserted into the inside of the gas-liquid separation tank along the tangent direction from the lower part of the side of the gas-liquid separation tank, the top of the gas-liquid separation tank is provided with a gas outlet, the gas outlet is in communication with the tail gas recovery device through the first negative pressure device, the lower end of the gas-liquid separation tank is provided with a fixed plate, the fixed plate is provided with a plurality of arc baffles with different heights and distributed around the same center, the opening of the arc baffle faces the outlet end of the liquid discharge pipe, the bottom of the gas-liquid separation tank is provided with a liquid outlet; the inner cavity of the horizontal centrifuge body is in communication with the tail gas recovery device through the second negative pressure device.

2. A centrifuge for solid-liquid-gas three-phase separation as claimed in claim 1, characterized in that, The inner wall of the drum is covered with a screen.

3. A centrifuge for solid-liquid-gas three phase separation as claimed in claim 1, wherein, The top of the gas-liquid separation tank is provided with an end cover, and the end cover is a circular truncated cone structure with a small upper end and a large lower end.

4. A centrifuge for solid-liquid-gas three-phase separation as claimed in claim 3, wherein, The gas outlet is arranged on the upper end surface of the end cover.

5. A centrifuge for solid-liquid-gas three phase separation as claimed in claim 1, wherein, The fixed plate is located below the outlet end of the liquid discharge pipe, and the fixed plate is a circular ring structure.

6. A centrifuge for solid-liquid-gas three phase separation as claimed in claim 1, wherein, The center of the arc baffle is located on the axis of the gas-liquid separation tank.

7. A centrifuge for solid-liquid-gas three phase separation as claimed in claim 6 wherein, The arc baffles are equally spaced or closely arranged on the fixed plate.

8. A centrifuge for solid-liquid-gas three phase separation as claimed in claim 1 wherein, The height of the arc baffle gradually increases from inside to outside.

9. A centrifuge for solid-liquid-gas three phase separation as claimed in claim 1 wherein, The arc baffles have the same central angle.

10. A centrifuge for solid-liquid-gas three phase separation as claimed in claim 1, wherein, The bottom of the gas-liquid separation tank is a reverse conical structure, and the reverse conical structure is located below the fixed plate, and the bottom of the reverse conical structure is provided with a liquid outlet.

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