Settling separation device for yellow phosphorus production sewage

Abstract

The yellow phosphorus production sewage settling separation device comprises a rotary drum and a spiral, the rotary drum comprises a rotary drum cavity, a slag discharge port pressure control assembly and a liquid-liquid separation assembly, the slag discharge port pressure control assembly is arranged at one end of the rotary drum cavity, and the slag discharge port pressure control assembly comprises a fixing ring seat, a hydraulic bag and a liquid supply pipe. The drum cavity close to one side of the liquid-liquid separation component is provided with an expanded cavity section; and the inner wall of the expanded cavity section is provided with a laminar flow baffle which is coaxial and vertical to the expanded cavity section. The phosphorus slag separation device can realize separation of phosphorus slag, phosphorus-containing liquid and water, and has the advantages of small equipment size, high separation efficiency and the like. According to the specific structure, the laminar flow baffle is arranged in the liquid-phase separation area, stirring of a screw to the area can be reduced, the separation effect of phosphorus-containing liquid and water can be improved, the hydraulic bag is adopted for controlling the pressure control assembly at the slag discharging opening, the durability of the device is improved, and the slag discharging pressure of the device can be adjusted.

Description

TECHNICAL FIELD

[0001] The utility model relates to sewage treatment technical field, concretely is a kind of yellow phosphorus production sewage sedimentation separation device. BACKGROUND

[0002] In the production process of yellow phosphorus, the wastewater produced in all places directly contacted with yellow phosphorus contains harmful substances such as phosphorus, mainly including wastewater such as gas washing tower, phosphorus receiving tank, floor flushing water and slag quenching water. The yellow phosphorus production wastewater is highly toxic and contains harmful substances such as P4, CN-, F-, etc. If it is directly discharged without treatment, it will cause serious harm to the environment. In the treatment process, sedimentation and separation are a common process, which can separate phosphorus slag, phosphorus-containing liquid and water. Since the sedimentation time of the sedimentation tank is relatively long, centrifugal sedimentation is widely used. For example, the patent CN201410516287.3 discloses a centrifugal sedimentation separator for yellow phosphorus wastewater primary separation, which adopts a horizontal screw centrifugal sedimentation device to implement solid-liquid-liquid three-phase separation. In the use of similar centrifugal sedimentation equipment, the following problems exist: the specific gravity difference between the phosphorus-containing liquid and water is not particularly large, and the separation effect is poor due to the stirring of the screw; by setting the discharge port pressure, such as the spring pressure plate used in the patent, the spring fails quickly in use, and cannot be adjusted according to different wastewater conditions. SUMMARY

[0003] The utility model aims at providing a yellow phosphorus production wastewater sedimentation separation device to solve the problems in the prior art.

[0004] In order to achieve the above-mentioned purpose, the technical scheme of the utility model provides a yellow phosphorus production wastewater sedimentation separation device, which comprises a rotating drum and a screw. The rotating drum comprises a rotating drum cavity, a discharge port pressure control assembly and a liquid-liquid separation assembly. The screw comprises a central pipe, an outer thread and a feed pipe. The rotating drum cavity is provided with the discharge port pressure control assembly at one end and the liquid-liquid separation assembly at the other end. The rotating drum cavity is provided with a plurality of discharge ports on the side wall of the side where the discharge port pressure control assembly is arranged. The discharge port pressure control assembly comprises a fixed ring seat, a hydraulic capsule and a liquid supply pipe. The fixed ring seat is arranged on one side of the rotating drum cavity and located between the rotating drum cavity and the central pipe of the screw. The hydraulic capsule is fixed on the side of the fixed ring seat facing the inside of the rotating drum cavity and is in communication with the liquid supply pipe. The liquid supply pipe extends outside.

[0005] Further, the fixed ring seat comprises a bottom ring, an upper outer ring and an upper inner ring. The hydraulic capsule is fixed on the bottom ring through the upper outer ring and the upper inner ring. The bottom ring, the upper outer ring and the upper inner ring are fixed by bolts. The hydraulic hole is arranged in the area between the bottom ring and the upper outer ring and the upper inner ring.

[0006] Further, the central pipe is tubular and provided with external threads on the outside, and the supply pipe is arranged in the central pipe; the supply pipe extends to the middle of the central pipe, and water baffle plates are arranged on both sides of the end of the supply pipe, and a plurality of water outlets are arranged on the side wall of the central pipe in the region between the two water baffle plates; one end of the liquid supply pipe is arranged at the fixed ring seat, and the other end passes through the two water baffle plates in sequence, and a plurality of blades are arranged on the outside of the liquid supply pipe in the region between the two water baffle plates.

[0007] Further, the blades are arranged on the outside of the liquid supply pipe in an array, are rectangular plates, have a lower height near one end of the liquid supply pipe, and are connected to the two water baffle plates at both ends.

[0008] Further, an enlarged cavity section is arranged in the drum cavity near the side of the liquid-liquid separation assembly, and the inner diameter of the enlarged cavity section is greater than that of other regions.

[0009] Further, a laminar flow baffle plate is arranged on the inner wall of the enlarged cavity section and is coaxial and perpendicular to the laminar flow baffle plate, the laminar flow baffle plate is annular in structure, the inner diameter of the laminar flow baffle plate is greater than the outer diameter of the external threads in this region, and a plurality of liquid passing openings are arranged on the outer edge of the laminar flow baffle plate that contacts the inside of the drum cavity.

[0010] The utility model discloses a horizontal screw centrifugal sewage sedimentation separation device, can realize the separation of phosphorous slag, phosphorous liquid and water, has the advantages of small equipment volume, high separation efficiency etc. On the specific structure, through the laminar flow baffle plate arranged in the liquid phase separation region can reduce the stirring of screw rod to this region, is favorable for improving the separation effect of phosphorous liquid and water, for the residue discharge port pressure control assembly, adopts hydraulic capsule to control, and its durability is higher, and can adjust the residue discharge pressure. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the whole scheme schematic diagram of the utility model.

[0012] Figure 2 It is the section schematic diagram of another embodiment of the utility model.

[0013] Figure 3 It is the partial enlarged view of residue discharge port pressure control assembly section of the utility model.

[0014] Figure 4 It is the partial enlarged view of liquid-liquid separation assembly section of the utility model. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0016] As shown in the accompanying drawings, Figures 1-4 The yellow phosphorus production wastewater sedimentation separation device relates to a horizontal screw centrifugal sedimentation device, which comprises a rotary drum 1, a screw 2 and a matching device, wherein the matching device comprises a motor, a bearing connection structure, water inlet components, material receiving components and the like for driving the rotary drum 1 and the screw 2 to rotate, the related components are commercially available products and are conventional technologies in the field, and do not belong to the protection content of the present application. The working principle of the horizontal screw centrifugal sedimentation device is based on the centrifugal sedimentation principle, and solid-liquid separation is realized by the rotary drum and the screw rotating at a certain differential speed in the same direction at a high speed.

[0017] The rotary drum 1 comprises a rotary drum cavity 11, a residue discharge port pressure control assembly 12 and a liquid-liquid separation assembly 13. The rotary drum cavity is a rotary cavity structure, one end of which is provided with the residue discharge port pressure control assembly 11, and the other end of which is provided with the liquid-liquid separation assembly 13. The rotary drum cavity 11 is provided with a plurality of residue discharge ports 111 on the side wall of the side provided with the residue discharge port pressure control assembly 11.

[0018] The screw 2 comprises a central pipe 21, an outer thread 22 and a feeding pipe 23,

[0019] The central pipe 21 is tubular, and the outer side is provided with the outer thread 22. The feeding pipe 23 is arranged in the central pipe 21.

[0020] Specifically, the feeding pipe 23 is located inside the central pipe 21 and extends to the middle part of the central pipe 21. Water baffle plates 231 are arranged on both sides of the end of the feeding pipe 23. A plurality of water outlets are arranged on the side wall of the central pipe 21 in the region between the two water baffle plates 231.

[0021] The outer thread 22 comprises a fixed section 221 and a necked section 222, wherein the necked section 222 is close to one side of the residue discharge port 111.

[0022] The screw 2 is arranged in the rotary drum cavity 11, and a small gap is arranged between the edge of the outer thread 22 and the inner wall of the rotary drum cavity 11.

[0023] The residue discharge port pressure control assembly 12 comprises a fixed ring seat 121, a hydraulic capsule 122 and a liquid supply pipe 123. The fixed ring seat 121 is arranged on one side of the rotary drum cavity and is located between the rotary drum cavity and the central pipe 21 of the screw 2. The fixed ring seat 121 can rotate with the screw 2 or not. In one embodiment of the present application, the fixed ring seat 121 is fixed on the central pipe 21 and rotates with the screw 2.

[0024] The hydraulic bladder 122 is fixed to the side of the fixed ring seat 121 facing the inside of the drum cavity 11 and is connected to the liquid supply pipe 123. The liquid supply pipe passes through the central pipe 21 and extends to the outside to connect with the hydraulic pump and the control valve group. The volume of the hydraulic bladder 122 can be controlled by the hydraulic pump, thereby controlling the space on the side of the slag discharge port to achieve control of the pressure of the slag discharge port. Compared with the control based on spring, the pressure can be adjusted more conveniently.

[0025] As attached Figure 3 As shown, specifically, the fixed ring seat 121 includes a bottom ring 1211, an upper outer ring 1212, and an upper inner ring 1213. The hydraulic bladder 122 is fixed to the bottom ring 1211 by the upper outer ring 1212 and the upper inner ring 121. The bottom ring 1211, the upper outer ring 1212, and the upper inner ring 1213 are fixed together by bolts. A hydraulic hole is provided in the area of ​​the bottom ring 1211 between the upper outer ring 1212 and the upper inner ring 1213.

[0026] The liquid supply pipe 123 is located at the fixed ring seat 121, and the other end passes through the two baffles 231 in sequence, continues through the central pipe 21 to the outside, or can pass through the inside of the supply pipe 23.

[0027] Multiple blades 1231 are provided on the outside of the liquid supply pipe 123 located in the middle area of ​​the two baffles 231. The blades 1231 are arranged in an array on the outside of the liquid supply pipe 123. They are rectangular plates with a lower height at the end near the liquid supply pipe 123 and are not connected to the baffles 231 at either end. This achieves the stirring effect with the liquid inlet while reducing the accumulation of waste residue between the baffles 231.

[0028] As attached Figure 4 As shown, the liquid-liquid separation component 13 is a conventional configuration in the field, with a heavy liquid outlet z on the side near the drum cavity 11 and a light liquid outlet q on the side near the axis of the drum cavity 11.

[0029] An enlarged cavity section 112 is provided in the drum cavity 11 near the liquid-liquid separation component 13, and the inner diameter of the enlarged cavity section 112 is larger than that of other areas.

[0030] As attached Figure 2 As shown, a laminar flow baffle 1121 with a coaxial perpendicular axis is provided on the inner wall of the enlarged cavity section 112. The laminar flow baffle 1121 has an annular structure, and its inner diameter is larger than the outer diameter of the outer screw surface 22 in this area. Several liquid passage ports 1122 are provided at the outer edge of the laminar flow baffle 1121 that contacts the inside of the drum cavity 11. The laminar flow baffle 1121 can reduce the agitation of the liquid in this area by the screw, which is beneficial to improving the separation effect of the liquid phase.

[0031] It should be noted that unless specifically stated and limited otherwise, the terms "mounting", "connecting", "connecting", "fixing", "setting" and the like should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

Claims

1. A sedimentation separation device for yellow phosphorus production wastewater, comprising a rotating drum and a screw, characterized in that, The rotary drum comprises a rotary drum cavity, a slag discharge port pressure control assembly, a liquid-liquid separation assembly, the screw comprises a central tube, an external thread, and a feeding pipe; the rotary drum cavity is provided with the slag discharge port pressure control assembly at one end and the liquid-liquid separation assembly at the other end; the rotary drum cavity is provided with a plurality of slag discharge ports on the side wall on the side provided with the slag discharge port pressure control assembly; the slag discharge port pressure control assembly comprises a fixed ring seat, a hydraulic capsule, and a liquid supply pipe; the fixed ring seat is arranged on one side of the rotary drum cavity and located between the rotary drum cavity and the central tube of the screw; the hydraulic capsule is fixed on the side of the fixed ring seat facing the inside of the rotary drum cavity and is in communication with the liquid supply pipe, and the liquid supply pipe extends outside.

2. The device for sedimentation and separation of wastewater from yellow phosphorus production according to claim 1, characterized by the fact that The fixed ring seat comprises a bottom ring, an upper outer ring, and an upper inner ring; the hydraulic capsule is fixed on the bottom ring through the upper outer ring and the upper inner ring; the bottom ring, the upper outer ring, and the upper inner ring are fixed by bolts; the hydraulic hole is arranged in the region between the bottom ring, the upper outer ring, and the upper inner ring.

3. The device for sedimentation and separation of wastewater from yellow phosphorus production according to claim 1, characterized by the fact that The central tube is tubular, provided with an external thread on the outside, and the feeding pipe is arranged in the central tube; the feeding pipe extends to the middle of the central tube, the water baffle is arranged on both sides of the end of the feeding pipe, and a plurality of water outlets are arranged on the side wall of the central tube in the region between the two water baffles; one end of the liquid supply pipe is arranged at the fixed ring seat, the other end passes through the two water baffles in sequence, and a plurality of blades are arranged on the outside of the liquid supply pipe in the region between the two water baffles.

4. The device for sedimentation and separation of wastewater from yellow phosphorus production according to claim 3, characterized by the fact that The blades are arranged on the outside of the liquid supply pipe in an array, are rectangular plates, have a lower height near one end of the liquid supply pipe, and are connected to the water baffles at both ends.

5. The device for sedimentation and separation of wastewater from yellow phosphorus production according to claim 1, characterized by the fact that An enlarged cavity section is arranged on the rotary drum cavity near the liquid-liquid separation assembly, and the inner diameter of the enlarged cavity section is larger than that of other regions.

6. The device for sedimentation and separation of wastewater from yellow phosphorus production according to claim 5, characterized by the fact that A laminar flow baffle coaxial with the inner wall of the enlarged cavity section is arranged perpendicularly, the laminar flow baffle is annular in structure, the inner diameter of the laminar flow baffle is larger than the outer diameter of the external thread in this region, and a plurality of liquid passing openings are arranged on the outer edge of the laminar flow baffle in contact with the inside of the rotary drum cavity.

Images