CN216863649U

CN216863649U - Mud phosphorus recovery processing system

Info

Publication number: CN216863649U
Application number: CN202123058130.5U
Authority: CN
Inventors: 高麟; 蒋敏; 曾伍祥; 冯宗贤
Original assignee: Intermet Technology Chengdu Co Ltd
Current assignee: Intermet Technology Chengdu Co Ltd
Priority date: 2021-12-07
Filing date: 2021-12-07
Publication date: 2022-07-01
Anticipated expiration: 2031-12-07

Abstract

The utility model discloses a sludge phosphorus recovery treatment system, which comprises: a phosphorus sludge evaporation part, a phosphorus steam filtering and dedusting part, a phosphorus steam drainage part, a phosphorus steam cooling and receiving part and a phosphorus steam driving part, wherein the phosphorus steam cooling and receiving part comprises a phosphorus steam and cooling liquid mixing device, the phosphorus steam and cooling liquid mixing device is provided with a first gas-liquid mixing cavity for mixing phosphorus steam and cooling liquid, a phosphorus steam input port and a tail gas output port which are respectively connected with the first gas-liquid mixing cavity, and a yellow phosphorus collecting tank positioned at the bottom of the first gas-liquid mixing cavity, the phosphorus steam cooling and phosphorus collecting part also comprises a tail gas and alkali liquid mixing device, the tail gas and alkali liquor mixing device is provided with a second gas-liquid mixing cavity for mixing the tail gas and the alkali liquor, and a tail gas input port and a tail gas output port which are respectively connected with the second gas-liquid mixing cavity, and the tail gas input port is connected with a tail gas output port of the phosphorus steam and cooling liquid mixing device.

Description

Mud phosphorus recovery processing system

Technical Field

The application relates to a sludge phosphorus recovery processing technology, in particular to a sludge phosphorus recovery processing system, a sludge phosphorus evaporation system, a sludge phosphorus recovery processing method and a sludge phosphorus evaporation device.

Background

The sludge phosphorus is a main byproduct in the production of yellow phosphorus and belongs to dangerous solid waste in phosphorus chemical industry. The applicant of the present application provides a method for treating phosphorus sludge by means of liquid membrane filtration technology in patent documents of publication numbers CN103213958A, CN103213959A, etc., but such method still needs to treat the filtered sludge-like impurities.

SUMMERY OF THE UTILITY MODEL

The application aims to provide a sludge phosphorus recovery processing system, a sludge phosphorus evaporation system, a sludge phosphorus recovery processing method and a sludge phosphorus evaporation device, so as to solve the technical problem of more conveniently recovering phosphorus resources from sludge phosphorus.

In order to solve the above technical problem, according to a first aspect of the present application, a sludge phosphorus recovery processing system is provided. The method comprises the following steps: the device comprises a mud phosphorus evaporation part, wherein a material mechanical conveying device and a material heating device arranged along the conveying direction of the material mechanical conveying device are arranged in a shell of the mud phosphorus evaporation part, and a mud phosphorus input port connected with a feeding part of the material mechanical conveying device, a mud phosphorus evaporation residual material discharge port connected with a discharging part of the material mechanical conveying device and a phosphorus steam output port connected with an exhaust part of the material mechanical conveying device are respectively arranged on the shell of the mud phosphorus evaporation part; the device comprises a phosphorus steam filtering and dust removing part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dust removing part, the filter element divides the interior of the phosphorus steam filtering and dust removing part into an original air chamber and an air purifying chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the air purifying chamber are respectively arranged on the shell of the phosphorus steam filtering and dust removing part; the phosphorus steam drainage part is arranged between the mud phosphorus evaporation part and the phosphorus steam filtering and dedusting part, and a phosphorus steam output port on the casing of the mud phosphorus evaporation part and a phosphorus steam input port on the casing of the phosphorus steam filtering and dedusting part are connected into a whole through a drainage channel which is limited by the casing of the phosphorus steam drainage part and has no substantial turning section from bottom to top; a phosphorus steam cooling and receiving part, wherein a phosphorus steam and cooling liquid mixing device is arranged in a shell of the phosphorus steam cooling and receiving part, the phosphorus steam and cooling liquid mixing device is provided with a first gas-liquid mixing cavity for mixing phosphorus steam and cooling liquid, a phosphorus steam input port and a tail gas output port which are respectively connected with the first gas-liquid mixing cavity, and a yellow phosphorus collecting tank positioned at the bottom of the first gas-liquid mixing cavity, and a phosphorus steam input port of the phosphorus steam and cooling liquid mixing device is connected with a phosphorus steam output port on the shell of the phosphorus steam filtering and dedusting part; and the phosphorus steam driving part comprises an air flow driving device, and the air flow driving device is arranged between a phosphorus steam input port of the phosphorus steam and cooling liquid mixing device and a phosphorus steam output port on the shell of the phosphorus steam filtering and dust removing part or behind a tail gas output port of the phosphorus steam and cooling liquid mixing device and is used for driving the phosphorus steam to flow through mechanical suction.

Optionally, the center of the phosphorus steam output port on the casing of the phosphorus sludge evaporation part and the center of the phosphorus steam input port on the casing of the phosphorus steam filtering and dedusting part are connected into a straight line which is vertically upward or obliquely upward, and the straight line is completely positioned in the drainage channel.

Optionally, the casing of the phosphorus steam flow guiding part forms a gas collecting hood, the gas collecting hood is composed of a hood body surrounded by a first side wall and a second side wall or a hood body surrounded by the first side wall and the second side wall and a top wall arranged at the top of the hood body, the first side wall is vertically arranged, and the second side wall is obliquely arranged and inclined to ensure that the flow guiding channel gradually converges from a phosphorus steam outlet on the casing of the phosphorus mud evaporation part to a phosphorus steam inlet on the casing of the phosphorus steam filtering and dust removing part.

Optionally, the second side wall is composed of a first second side wall, a second side wall and a third second side wall, the first second side wall and the second side wall are arranged oppositely, the third second side wall and the first side wall are arranged oppositely, and the first second side wall, the second side wall, the third second side wall and the first side wall enclose a quadrangular frustum pyramid.

Optionally, the mechanical material conveying device comprises an airtight inner container located in the housing and a material conveyor located in the airtight inner container, and the feeding part, the discharging part and the exhaust part are respectively arranged on the airtight inner container; the bottom of the gas-collecting hood is connected with the airtight inner container into a whole in an airtight mode.

Optionally, the mechanical material conveying device comprises an airtight inner container located in the housing and a material conveyor located in the airtight inner container, and the feeding portion, the discharging portion and the exhaust portion are respectively arranged on the airtight inner container.

Optionally, the material mechanical conveying device includes a material conveyor, the material conveyor has a conveying part disposed on a surface of a material conveying base and a transmission part for driving the conveying part, and the conveying part is driven by the transmission part to move along a conveying direction of the material mechanical conveying device and to act on the material in a manner of dispersing the material on the material conveying base during movement to realize material conveying.

Optionally, the mechanical material conveying device comprises a material conveyor, the material conveyor is provided with a conveying part arranged on the surface of the material conveying base and a transmission part for driving the conveying part, and the conveying part can move along the conveying direction of the mechanical material conveying device under the driving of the transmission part and acts on the material during movement to realize material conveying; the transmission part comprises a wrapping transmission part which is provided with a driving wheel and a driven wheel which are oppositely arranged in the conveying direction and a transmission chain or a transmission belt which is wrapped on the driving wheel and the driven wheel; the wrap-around drive component is positioned laterally above the material transport platform; the conveying components are arranged on the transmission chain or the transmission belt at intervals and are positioned above the material conveying base platform.

In order to solve the above technical problem, according to a second aspect of the present application, there is provided a sludge phosphorus evaporation system. The method comprises the following steps: the device comprises a mud phosphorus evaporation part, wherein a material mechanical conveying device and a material heating device arranged along the conveying direction of the material mechanical conveying device are arranged in a shell of the mud phosphorus evaporation part, and a mud phosphorus input port connected with a feeding part of the material mechanical conveying device, a mud phosphorus evaporation residual material discharge port connected with a discharging part of the material mechanical conveying device and a phosphorus steam output port connected with an exhaust part of the material mechanical conveying device are respectively arranged on the shell of the mud phosphorus evaporation part; the device comprises a phosphorus steam filtering and dust removing part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dust removing part, the filter element divides the interior of the phosphorus steam filtering and dust removing part into an original air chamber and an air purifying chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the air purifying chamber are respectively arranged on the shell of the phosphorus steam filtering and dust removing part; and the phosphorus steam drainage part is arranged between the sludge phosphorus evaporation part and the phosphorus steam filtering and dedusting part, and connects a phosphorus steam output port on the casing of the sludge phosphorus evaporation part and a phosphorus steam input port on the casing of the phosphorus steam filtering and dedusting part into a whole through a drainage channel which is limited by the casing of the phosphorus steam drainage part and has no substantial turning section from bottom to top.

In order to solve the above technical problem, according to a third aspect of the present application, a phosphorous sludge recovery processing method is provided. The method uses the system of the first aspect or the system of the second aspect to carry out recovery treatment on the sludge phosphorus to be treated.

In order to solve the above technical problem, according to a fourth aspect of the present application, a sludge phosphorus recovery processing system is provided. The method comprises the following steps: the device comprises a mud phosphorus evaporation part, wherein a material mechanical conveying device and a material heating device arranged along the conveying direction of the material mechanical conveying device are arranged in a shell of the mud phosphorus evaporation part, and a mud phosphorus input port connected with a feeding part of the material mechanical conveying device, a mud phosphorus evaporation residual material discharge port connected with a discharging part of the material mechanical conveying device and a phosphorus steam output port connected with an exhaust part of the material mechanical conveying device are respectively arranged on the shell of the mud phosphorus evaporation part; the device comprises a phosphorus steam filtering and dust removing part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dust removing part, the filter element divides the interior of the phosphorus steam filtering and dust removing part into an original air chamber and an air purifying chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the air purifying chamber are respectively arranged on the shell of the phosphorus steam filtering and dust removing part; the phosphorus steam flow guiding part is arranged between the phosphorus sludge evaporation part and the phosphorus steam filtering and dedusting part, and a phosphorus steam output port on the shell of the phosphorus sludge evaporation part and a phosphorus steam input port on the shell of the phosphorus steam filtering and dedusting part are connected together through a flow guiding channel limited by the shell of the phosphorus steam flow guiding part; a phosphorus steam cooling and phosphorus receiving part, wherein a phosphorus steam and cooling liquid mixing device is arranged in a shell of the phosphorus steam cooling and phosphorus receiving part, the phosphorus steam and cooling liquid mixing device is provided with a first gas-liquid mixing cavity for mixing phosphorus steam and cooling liquid, a phosphorus steam input port and a tail gas output port which are respectively connected with the first gas-liquid mixing cavity, and a yellow phosphorus collecting tank positioned at the bottom of the first gas-liquid mixing cavity, a phosphorus steam input port of the phosphorus steam and cooling liquid mixing device is connected with a phosphorus steam output port on the shell of the phosphorus steam filtering and dust removing part, and phosphorus steam between the phosphorus steam input port and the tail gas output port of the phosphorus steam and cooling liquid mixing device needs to pass below the liquid level of the cooling liquid maintained in the first gas-liquid mixing cavity; the phosphorus steam driving part comprises an airflow driving device, the airflow driving device adopts a vacuum pump or a water ring vacuum pump, and the vacuum pump or the water ring vacuum pump is arranged behind a tail gas output port of the phosphorus steam and cooling liquid mixing device.

Optionally, the phosphorus steam flow guiding part connects the phosphorus steam output port on the casing of the mud phosphorus evaporation part and the phosphorus steam input port on the casing of the phosphorus steam filtering and dust removing part into a whole through a flow guiding channel which is limited by the casing of the phosphorus steam flow guiding part from bottom to top and has no substantial turning section.

Optionally, the conveying component adopts a scraper arranged perpendicular to the conveying direction; the transmission parts comprise the wrapping transmission parts which are oppositely arranged at two sides of the conveying direction; and two ends of the scraper are respectively connected with the wrapping type transmission parts which are oppositely arranged at two sides of the conveying direction.

Optionally, the phosphorus steam cooling and phosphorus receiving part is further provided with a tail gas and alkali liquor mixing device, the tail gas and alkali liquor mixing device is provided with a second gas-liquid mixing chamber for mixing tail gas and alkali liquor, and a tail gas input port and a tail gas output port which are respectively connected with the second gas-liquid mixing chamber, the tail gas input port of the tail gas and alkali liquor mixing device is connected with the tail gas output port of the phosphorus steam and cooling liquor mixing device, and tail gas between the tail gas input port of the tail gas and alkali liquor mixing device and the tail gas output port of the tail gas and alkali liquor mixing device is required to pass below the liquid level of cooling liquid maintained in the second gas-liquid mixing chamber; the vacuum pump or the water ring vacuum pump is arranged behind the tail gas output port of the tail gas and alkali liquor mixing device.

Optionally, a housing of the phosphorus steam cooling and receiving part and a housing of the phosphorus steam filtering and dedusting part are connected into a whole, and a heat insulation structure is arranged between the phosphorus steam cooling and receiving part and the phosphorus steam filtering and dedusting part.

In order to solve the above technical problem, according to a fifth aspect of the present application, there is provided a sludge phosphorus recovery processing system. The method comprises the following steps: the device comprises a mud phosphorus evaporation part, wherein a material mechanical conveying device and a material heating device arranged along the conveying direction of the material mechanical conveying device are arranged in a shell of the mud phosphorus evaporation part, and a mud phosphorus input port connected with a feeding part of the material mechanical conveying device, a mud phosphorus evaporation residual material discharge port connected with a discharging part of the material mechanical conveying device and a phosphorus steam output port connected with an exhaust part of the material mechanical conveying device are respectively arranged on the shell of the mud phosphorus evaporation part; the device comprises a phosphorus steam filtering and dust removing part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dust removing part, the filter element divides the interior of the phosphorus steam filtering and dust removing part into an original air chamber and an air purifying chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the air purifying chamber are respectively arranged on the shell of the phosphorus steam filtering and dust removing part; the phosphorus steam flow guiding part is arranged between the phosphorus sludge evaporation part and the phosphorus steam filtering and dedusting part, and a phosphorus steam output port on the shell of the phosphorus sludge evaporation part and a phosphorus steam input port on the shell of the phosphorus steam filtering and dedusting part are connected together through a flow guiding channel limited by the shell of the phosphorus steam flow guiding part; a phosphorus steam cooling and phosphorus receiving part which comprises a phosphorus steam and cooling liquid mixing device, the phosphorus steam and cooling liquid mixing device is provided with a first gas-liquid mixing cavity for mixing phosphorus steam and cooling liquid, a phosphorus steam input port and a tail gas output port which are respectively connected with the first gas-liquid mixing cavity, and a yellow phosphorus collecting tank positioned at the bottom of the first gas-liquid mixing cavity, a phosphorus steam input port of the phosphorus steam and cooling liquid mixing device is connected with a phosphorus steam output port on the shell of the phosphorus steam filtering and dedusting part, the phosphorus steam cooling and phosphorus recovery part also comprises a tail gas and alkali liquor mixing device, the tail gas and alkali liquor mixing device is provided with a second gas-liquid mixing cavity for mixing the tail gas and the alkali liquor, and a tail gas input port and a tail gas output port which are respectively connected with the second gas-liquid mixing cavity, the tail gas input port is connected with a tail gas output port of the phosphorus steam and cooling liquid mixing device; and the phosphorus steam driving part comprises an air flow driving device, and the air flow driving device is arranged between a phosphorus steam input port of the phosphorus steam and cooling liquid mixing device and a phosphorus steam output port on the shell of the phosphorus steam filtering and dust removing part or behind a tail gas output port of the phosphorus steam and cooling liquid mixing device and is used for driving the phosphorus steam to flow through mechanical suction.

Optionally, the shell of the phosphorus steam and cooling liquid mixing device and the shell of the tail gas and alkali liquid mixing device are connected into a whole.

In order to solve the above technical problem, according to a sixth aspect of the present application, there is provided a sludge phosphorus evaporation apparatus. The method comprises the following steps: the device comprises a shell, a phosphorus slurry inlet, a phosphorus slurry evaporation residual material discharge port and a phosphorus steam outlet, wherein the shell is provided with the phosphorus slurry inlet, the phosphorus slurry evaporation residual material discharge port and the phosphorus steam outlet respectively; the material mechanical conveying device is arranged in the shell, a feeding part of the material mechanical conveying device is connected with the phosphorus sludge input port, a discharging part of the material mechanical conveying device is connected with the phosphorus sludge evaporation residual material discharging port, and an exhaust part of the material mechanical conveying device is connected with the phosphorus steam output port; the material heating device is arranged in the shell and is arranged along the conveying direction of the material mechanical conveying device; the material mechanical conveying device comprises an airtight inner container positioned in the shell and a material conveyor positioned in the airtight inner container, and the feeding part, the discharging part and the exhaust part are respectively arranged on the airtight inner container.

Optionally, the material conveyor is provided with a conveying part arranged on the surface of the material conveying base and a transmission part for driving the conveying part, and the conveying part can move along the conveying direction of the material mechanical conveying device under the driving of the transmission part and acts on the material in a manner of dispersing the material on the material conveying base during movement to realize material conveying.

Optionally, the material conveying base station is provided by an inner bottom wall of the airtight inner container or belongs to a part of the material conveyor.

Optionally, the material conveyor is provided with a conveying part arranged on the surface of the material conveying base and a transmission part for driving the conveying part, and the conveying part can move along the conveying direction of the material mechanical conveying device under the driving of the transmission part and acts on the material during movement to realize material conveying; the transmission part comprises a wrapping transmission part which is provided with a driving wheel and a driven wheel which are oppositely arranged in the transmission direction of the material mechanical transmission device and a transmission chain or a transmission belt which is wrapped on the driving wheel and the driven wheel; the wrap-around drive component is positioned laterally above the material transport platform; the conveying components are arranged on the transmission chain or the transmission belt at intervals and are positioned above the material conveying base platform.

Optionally, the conveying component adopts a scraper arranged transversely to the conveying direction; the scraper plates are arranged on the transmission chain or the transmission belt at intervals along the conveying direction to form a grid-shaped scraping structure.

Optionally, the transmission component comprises the wrapping transmission components which are oppositely arranged at two sides of the conveying direction; and two ends of the scraper are respectively connected with the wrapping type transmission parts which are oppositely arranged at two sides of the conveying direction.

Optionally, the conveying components are distributed along the whole circumference of the transmission chain or the transmission belt, so that a conveying component connecting ring is formed on the material conveying base platform, and the outlet of the feeding part is positioned in the conveying component connecting ring; and/or the shape of the airtight inner container is matched with that of the surrounding type transmission component to form an oblong structure with the length in the conveying direction and the thickness in the up-down direction.

Optionally, the material heating device is located below the airtight inner container; and/or the material heating devices are distributed in sequence along the conveying direction of the material mechanical conveying device to form a heating section and an evaporation section.

Optionally, the phosphorus steam output port and the exhaust part below the phosphorus steam output port are located at the top of the mechanical material conveying device and are arranged corresponding to the evaporation section.

Optionally, the exhaust part is provided with a gas-collecting hood with an opening which is gradually converged upwards, and the bottom of the gas-collecting hood is connected with the airtight liner in an airtight manner; and/or a feed port is arranged on the side wall of the feeding part on the airtight inner container, and the mud phosphorus input port is connected with the feed port; and/or a discharge port is arranged on the bottom wall of the discharge part on the airtight liner, and the discharge port for the residual phosphorus evaporation material is connected with the discharge port; and/or the mud phosphorus evaporation residual material discharge opening is connected with an intermediate storage tank through a first discharge valve, and the intermediate storage tank is provided with a gas replacement device for injecting safe replacement gas into the intermediate storage tank and a second discharge valve for discharging materials in the intermediate storage tank.

In order to solve the above technical problem, according to a seventh aspect of the present application, there is provided a sludge phosphorus evaporation apparatus. The method comprises the following steps: the device comprises a shell, a phosphorus slurry inlet, a phosphorus slurry evaporation residual material discharge port and a phosphorus steam outlet, wherein the shell is provided with the phosphorus slurry inlet, the phosphorus slurry evaporation residual material discharge port and the phosphorus steam outlet respectively; the material mechanical conveying device is arranged in the shell, a feeding part of the material mechanical conveying device is connected with the phosphorus sludge input port, a discharging part of the material mechanical conveying device is connected with the phosphorus sludge evaporation residual material discharging port, and an exhaust part of the material mechanical conveying device is connected with the phosphorus steam output port; the material heating device is arranged in the shell and is arranged along the conveying direction of the material mechanical conveying device; the material mechanical conveying device comprises a material conveyor, the material conveyor is provided with a conveying part arranged on the surface of a material conveying base platform and a transmission part used for driving the conveying part, and the conveying part can move along the conveying direction of the material mechanical conveying device under the driving of the transmission part and acts on materials in a manner of dispersing the materials on the material conveying base platform to realize material conveying through movement.

Optionally, the transmission component comprises a wrap-around transmission component, and the wrap-around transmission component is provided with a driving wheel and a driven wheel which are arranged oppositely in the conveying direction and a transmission chain or a transmission belt which wraps the driving wheel and the driven wheel at the same time; the wrap-around drive component is positioned laterally above the material transport platform; the conveying components are arranged on the transmission chain or the transmission belt at intervals and are positioned above the material conveying base platform.

Optionally, the conveying members are distributed along the whole circumference of the transmission chain or the transmission belt, so that a conveying member connecting ring is formed on the material conveying base, and the outlet of the feeding portion is positioned in the conveying member connecting ring.

Optionally, the material heating device is located below the material conveying base. Optionally, the material heating device is distributed in sequence along the conveying direction of the material mechanical conveying device to form a heating section and an evaporation section.

Optionally, the material heating device adopts an electric heating element; and/or a discharge port is arranged on the material conveying base station and positioned at the discharge part, and the discharge port for the residual phosphorus evaporation material is connected with the discharge port.

Optionally, the discharge port for residual materials after phosphorus sludge evaporation is connected with an intermediate storage tank through a first discharge valve, and the intermediate storage tank is provided with a gas replacement device for injecting safe replacement gas into the intermediate storage tank and a second discharge valve for discharging materials in the intermediate storage tank.

In order to solve the above-described technical problem, according to an eighth aspect of the present application, there is provided a sludge phosphorus evaporation apparatus. The method comprises the following steps: the device comprises a shell, a phosphorus slurry inlet, a phosphorus slurry evaporation residual material discharge port and a phosphorus steam outlet, wherein the shell is provided with the phosphorus slurry inlet, the phosphorus slurry evaporation residual material discharge port and the phosphorus steam outlet respectively; the material mechanical conveying device is arranged in the shell, a feeding part of the material mechanical conveying device is connected with the phosphorus sludge input port, a discharging part of the material mechanical conveying device is connected with the phosphorus sludge evaporation residual material discharging port, and an exhaust part of the material mechanical conveying device is connected with the phosphorus steam output port; the material heating device is arranged in the shell and is arranged along the conveying direction of the material mechanical conveying device; the device comprises a mud phosphorus evaporation residual material discharging port, a first discharging valve, a gas replacement device and a second discharging valve, wherein the mud phosphorus evaporation residual material discharging port is connected with an intermediate storage device through the first discharging valve, and the intermediate storage device is provided with the gas replacement device for injecting safe replacement gas into the intermediate storage device and the second discharging valve for discharging materials in the intermediate storage device.

Optionally, the material mechanical conveying device includes a material conveyor, the material conveyor includes a conveying part disposed on a surface of a material conveying base and a transmission part for driving the conveying part, the conveying part is driven by the transmission part to move along a conveying direction of the material mechanical conveying device and to act on the material during movement to convey the material, a discharge port is disposed on the material conveying base and located in the discharge portion, and the discharge port for the residual material of phosphorus evaporation is connected to the discharge port.

Optionally, the material heating device is located below the material conveying base; and/or the material heating device adopts an electric heating element.

Optionally, the material heating device is distributed in sequence along the conveying direction of the material mechanical conveying device to form a heating section and an evaporation section.

Optionally, the intermediate stocker is connected with a tapered tube with a larger side pipe diameter by using a first discharge valve and a smaller side pipe diameter by using a second discharge valve; the first discharge valve is a discharge valve matched with a larger pipe diameter at the connecting side of the first discharge valve of the intermediate storage device, and the second discharge valve is a discharge valve matched with a smaller pipe diameter at the connecting side of the second discharge valve of the intermediate storage device.

In order to solve the above technical problem, according to a ninth aspect of the present application, there is provided a sludge phosphorus evaporation apparatus comprising: the device comprises a shell, a phosphorus slurry inlet, a phosphorus slurry evaporation residual material discharge port and a phosphorus steam outlet, wherein the shell is provided with the phosphorus slurry inlet, the phosphorus slurry evaporation residual material discharge port and the phosphorus steam outlet respectively; the material mechanical conveying device is arranged in the shell, a feeding part of the material mechanical conveying device is connected with the phosphorus sludge input port, a discharging part of the material mechanical conveying device is connected with the phosphorus sludge evaporation residual material discharging port, and an exhaust part of the material mechanical conveying device is connected with the phosphorus steam output port; the material heating device is arranged in the shell and is arranged along the conveying direction of the material mechanical conveying device; the material mechanical conveying device comprises a material conveyor, the material conveyor is provided with a conveying part and a transmission part, the conveying part is arranged on the surface of a material conveying base platform, the transmission part is used for driving the conveying part, the conveying part can move along the conveying direction of the material mechanical conveying device under the driving of the transmission part and acts on materials during movement to realize material conveying, and the material conveying base platform is provided with a width extending transversely along the conveying direction of the material mechanical conveying device; and the feeding part is provided with a material distribution structure used for distributing materials in a direction transverse to the conveying direction of the material mechanical conveying device.

Optionally, the distributing structure is including being located material transport base station top and avoiding conveying part follows the transverse extension's of material mechanical conveying device direction of transfer distributing pipe, be equipped with on the distributing pipe and follow the material distributing opening of material mechanical conveying device's direction of transfer's transverse distribution.

Optionally, the transmission component comprises a wrap-around transmission component, and the wrap-around transmission component is provided with a driving wheel and a driven wheel which are arranged oppositely in the conveying direction and a transmission chain or a transmission belt which wraps the driving wheel and the driven wheel at the same time; the wrap-around drive component is positioned laterally above the material transport platform; the conveying components are arranged on the transmission chain or the transmission belt at intervals and are positioned above the material conveying base station.

Optionally, the conveying members are distributed along the whole circumference of the transmission chain or the transmission belt, so that a conveying member connecting ring is formed on the material conveying base platform, and the material distribution structure is located in the conveying member connecting ring.

Optionally, the material heating device adopts an electric heating element; and/or a discharge port is arranged on the material conveying base station and positioned at the discharge part, and the discharge port of the residual phosphorus evaporation material is connected with the discharge port; and/or the mud phosphorus evaporation residual material discharge port is connected with an intermediate storage device through a first discharge valve, and the intermediate storage device is provided with a gas replacement device for injecting safe replacement gas into the intermediate storage device and a second discharge valve for discharging materials in the intermediate storage device; and/or the conveying component can move along the conveying direction of the material mechanical conveying device under the driving of the transmission component and acts on the materials in a manner of dispersing the materials on the material conveying base platform during movement so as to realize material conveying; and/or the material mechanical conveying device comprises an airtight inner container positioned in the shell, the material conveyor is positioned in the airtight inner container, the feeding part, the discharging part and the exhaust part are respectively arranged on the airtight inner container, and the material conveying base is provided by the inner bottom wall of the airtight inner container or belongs to one part of the material conveyor.

The sludge phosphorus recovery treatment system, the sludge phosphorus evaporation system, the sludge phosphorus recovery treatment method and the sludge phosphorus evaporation device in the first to ninth aspects can extract phosphorus steam by evaporating sludge phosphorus, the phosphorus steam becomes yellow phosphorus after being cooled, and sludge phosphorus such as phosphorus pentoxide in the sludge phosphorus evaporates residual substances to form dry slag or dry ash in the sludge phosphorus evaporation process, and can be reused as phosphorite after being subsequently treated by agglomeration. The residual substances of the phosphorus sludge after the phosphorus sludge recovery treatment are dry slag or dry ash, so that the subsequent treatment is more convenient.

The present application is further described with reference to the following drawings and detailed description. Additional aspects and advantages provided by the present application will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the present application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to assist in understanding the present application and are incorporated in and constitute a part of this specification, with the understanding that the present application is to be considered an exemplification of the principles of the utility model and is not intended to be unduly limiting. In the drawings:

fig. 1 is a schematic structural diagram of an embodiment of a sludge phosphorus recovery processing system of the present application.

Fig. 2 is a schematic structural diagram of an embodiment of the sludge phosphorus recovery processing system.

Fig. 3 is a schematic structural diagram of an embodiment of the sludge phosphorus recovery processing system.

Fig. 4 is a sectional view taken along line a-a in fig. 1.

Fig. 5 is a sectional view taken along line B-B in fig. 1.

Fig. 6 is a cross-sectional view (schematic) taken along line C-C in fig. 1.

Fig. 7 is a sectional view (schematic view) taken along line D-D in fig. 2.

Detailed Description

The present application will now be described more fully hereinafter with reference to the accompanying drawings. Those of ordinary skill in the art will be able to implement the present application based on these teachings. Before describing the present application in conjunction with the drawings, it is noted that:

the technical solutions and features provided in the respective sections including the following description may be combined with each other without conflict. Furthermore, where possible, these technical solutions, technical features and related combinations may be given specific technical subject matter and are protected by the accompanying patent.

The embodiments of the application referred to in the following description are generally only some embodiments, rather than all embodiments, on the basis of which all other embodiments that can be derived by a person skilled in the art without inventive step should be considered within the scope of patent protection.

With respect to the terms and units in this specification: the terms "comprising," "including," "having," and any variations thereof in this specification and in the claims and following claims are intended to cover non-exclusive inclusions. In addition, other related terms and units can be reasonably construed based on the description to provide related contents.

Because the sludge phosphorus is treated by adopting the liquid membrane filtration technology, the sludge-like impurities after filtration still need to be treated, and the whole sludge phosphorus treatment process flow is long, the sludge phosphorus is evaporated to extract phosphorus steam, the phosphorus steam becomes yellow phosphorus after being cooled, sludge phosphorus such as phosphorus pentoxide in the sludge phosphorus is evaporated to form dry slag or dry ash in the evaporation process of the sludge phosphorus, and the dry slag or the dry ash is used as a technical route for recycling the phosphorus ore after being treated by the clusters.

The inventor researches and researches on the spot of some yellow phosphorus manufacturers to find that phosphorus steam is extracted by evaporating phosphorus sludge, the phosphorus steam becomes yellow phosphorus after being cooled, residual substances such as phosphorus pentoxide and the like in the phosphorus sludge evaporation process are evaporated to form dry slag or dry ash, the dry slag or the dry ash is used as a technical route for recycling the phosphorus ore after being treated by agglomeration, and the reasonable phosphorus sludge recovery treatment system and related phosphorus sludge evaporation equipment are designed to be the most key. When some manufacturers try to recover and treat the phosphorus sludge in the mode, the evaporation production environment of the phosphorus sludge is very severe, and the problems mainly comprise: the design of the sludge phosphorus evaporator is unreasonable, phosphorus steam leakage and a large potential safety hazard caused by phosphorus steam leakage exist, the sludge phosphorus evaporation efficiency is low, and a large amount of greenhouse gas emission can be generated in a heating mode through fuel combustion; secondly, the content of solid impurities in the phosphorus steam is high, and the purity of the recovered yellow phosphorus is not ideal; thirdly, the sludge phosphorus evaporator and related phosphorus steam pipeline facilities are easy to block; fourthly, the integral phosphorus sludge recovery system with poor integrity, high integrity and exquisite structure is not provided; and fifthly, the tail gas after the phosphorus steam recovery treatment contains acidic substances, so that subsequent equipment damage and pollution emission are easily caused.

Several sludge phosphorus recovery treatment systems and related equipment will be provided below to better realize sludge phosphorus recovery treatment.

Embodiment 1 of sludge phosphorus recovery and treatment system

Fig. 1 is a schematic structural diagram of an embodiment of a sludge phosphorus recovery processing system of the present application. Fig. 4 is a sectional view taken along line a-a in fig. 1. Fig. 5 is a sectional view taken along line B-B in fig. 1. Fig. 6 is a cross-sectional view (schematic) taken along line C-C in fig. 1. As shown in fig. 1 and 4-6, a sludge phosphorus recovery and treatment system comprises: a phosphorus sludge evaporation part 11, a phosphorus vapor filtering and dust removing part 13, a phosphorus vapor diversion part 12, a phosphorus vapor cooling and phosphorus collecting part 14 and a phosphorus vapor driving part 15 (the phosphorus vapor driving part 15 is hidden from view in fig. 1).

Wherein, a material mechanical conveying device 111 and a material heating device 112 arranged along the conveying direction (the direction indicated by an arrow D1 in fig. 1) of the material mechanical conveying device 111 are arranged in the housing of the sludge phosphorus evaporating part 11, and a sludge phosphorus input port 113 connected with the feeding part of the material mechanical conveying device 111, a sludge phosphorus evaporating residual material discharging port 114 connected with the discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with the exhaust part of the material mechanical conveying device 111 are respectively arranged on the housing of the sludge phosphorus evaporating part 11.

The phosphorus sludge evaporation part 11 is used for receiving externally conveyed phosphorus sludge, the phosphorus sludge enters the material mechanical conveying device 111 through the feeding part of the material mechanical conveying device 111 and is conveyed in the direction indicated by an arrow D1 through the material mechanical conveying device 111, the phosphorus sludge on the material mechanical conveying device 111 is heated by the material heating device 112 in the conveying process, and P in the phosphorus sludge is₄Evaporated to phosphorus vapor and exhausted from the mechanical material conveying device 111 to phosphorusThe steam outlet 115 discharges, and as the phosphorus sludge evaporates, the residual phosphorus evaporation materials (phosphorus pentoxide and the like) are formed into dry slag and discharged from the discharge part of the material mechanical conveying device 111 and the residual phosphorus sludge evaporation material discharge opening 114.

A filter element 131 capable of enduring the temperature of the phosphorus steam is arranged in the shell of the phosphorus steam filtering and dust removing part 13, the filter element 131 divides the interior of the phosphorus steam filtering and dust removing part 13 into an original air chamber 132 and an air purifying chamber 133, and a phosphorus steam inlet 134 connected with the original air chamber 132 and a phosphorus steam outlet connected with the air purifying chamber 133 are respectively arranged on the shell of the phosphorus steam filtering and dust removing part 13.

The phosphorus vapor filtering and dedusting part 13 is used for receiving the phosphorus vapor from the sludge phosphorus evaporation part 11 and carrying out high-temperature filtering and dedusting on the phosphorus vapor above the dew point temperature of the phosphorus vapor, so that the filter element 131 needs to resist the temperature of the phosphorus vapor. Filter elements meeting such service conditions are currently available on the market, such as ceramic filter elements, metal filter elements, etc. The phosphorus steam before filtering firstly enters the original air chamber 132 through a phosphorus steam input port 134 connected with the original air chamber 132, then enters the air purifying chamber 133 after being filtered by the filter element 131, and the filtered clean phosphorus steam is discharged from a phosphorus steam output port connected with the air purifying chamber 133.

The phosphorus vapor diversion part 12 is arranged between the phosphorus sludge evaporation part 11 and the phosphorus vapor filtering and dedusting part 13, and a phosphorus vapor output port 115 on the casing of the phosphorus sludge evaporation part 11 and a phosphorus vapor input port 134 on the casing of the phosphorus vapor filtering and dedusting part 13 are connected together through a diversion channel 121 defined by the casing of the phosphorus vapor diversion part 12. The phosphorus vapor diversion part 12 is used for guiding the phosphorus vapor generated by the phosphorus sludge evaporation part 11 into the phosphorus vapor filtering and dust removing part 13.

A phosphorus steam and cooling liquid mixing device 141 is arranged in the shell of the phosphorus steam cooling and phosphorus collecting part 14, the phosphorus steam and cooling liquid mixing device 141 is provided with a first gas-liquid mixing cavity 1401 for mixing phosphorus steam and cooling liquid, a phosphorus steam input port 1402 and an exhaust gas output port 1404 which are respectively connected with the first gas-liquid mixing cavity 1401, and a yellow phosphorus collecting tank 1403 positioned at the bottom of the first gas-liquid mixing cavity 1401, and the phosphorus steam input port 1402 of the phosphorus steam and cooling liquid mixing device 141 is connected with a phosphorus steam output port on the shell of the phosphorus steam filtering and dust removing part 13.

The phosphorus steam and cooling liquid mixing device 141 of the phosphorus steam cooling and phosphorus collecting part 14 is used for receiving the clean phosphorus steam which is discharged from the phosphorus steam filtering and dust removing part 13 and subjected to filtering and dust removal, and cooling the phosphorus steam through cooling liquid, so that high-purity yellow phosphorus is obtained in a yellow phosphorus collecting tank 1403, and tail gas is discharged through a tail gas outlet 1404. The first gas-liquid mixing cavity 1401 is generally used for spraying cooling liquid (usually water) to the phosphorus vapor in a spraying manner to realize gas-liquid mixing and cooling the yellow phosphorus gas. Of course, the first gas-liquid mixing chamber 1401 can realize gas-liquid mixing in any other possible way.

The phosphorus vapor driving part 15 comprises an air flow driving device 151, and the air flow driving device 151 is arranged between a phosphorus vapor input port 1402 of the phosphorus vapor and cooling liquid mixing device 141 and a phosphorus vapor output port on the shell of the phosphorus vapor filtering and dust removing part 13 or behind a tail gas output port 1404 of the phosphorus vapor and cooling liquid mixing device 141 and used for driving the flow of phosphorus vapor through mechanical suction. Generally, the airflow driving device 151 may employ a fan or a pump.

Above-mentioned phosphorus sludge recovery processing system can be through evaporating to phosphorus sludge and draw phosphorus steam, becomes yellow phosphorus after the phosphorus steam cooling, phosphorus pentoxide among the phosphorus sludge in the phosphorus sludge evaporation process etc. as phosphorus sludge evaporation residual substance and form dry slag or dry ash, can follow-up be the phosphorus ore retrieval and utilization after the group is handled, because phosphorus sludge evaporation residual substance after the phosphorus sludge recovery processing is dry slag or dry ash, the follow-up processing is more convenient. In addition, because the phosphorus steam filtering and dust removing part 13 is adopted, the phosphorus steam is filtered by the filter element 131 before being cooled, the solid particles in the phosphorus steam can be effectively removed by the filtering mode, and the purity of the recovered yellow phosphorus is greatly improved.

Improvement mode I of embodiment 1 of sludge phosphorus recovery and treatment system

The inventors have found that there are two key points in the design of the phosphorus vapor diversion part 12 of the sludge phosphorus recovery treatment system: firstly, the phosphorus vapor generated from the phosphorus sludge evaporation part 11 contains a large amount of dust which easily causes the blockage of the drainage channel 121, and therefore, special consideration needs to be given to how to avoid the blockage of the drainage channel 121 by the dust; secondly, the phosphorus vapor is easy to be cooled to separate out liquid yellow phosphorus, which causes further blockage of the drainage channel 121 and greatly affects the normal operation of the phosphorus vapor filtering and dust removing part 13 (the liquid yellow phosphorus can be attached to the filter element 131 to reduce the filtering efficiency of the filter element 131), so heating or heat preservation measures of the phosphorus vapor drainage part 12 need to be taken into consideration.

Aiming at the two key points, in order to avoid the blockage of the drainage channel 121 and prevent the phosphorus steam from cooling, according to the conventional thought, the drainage channel 121 can be designed into a shape which extends vertically upwards from the phosphorus sludge evaporation part 11, then turns downwards and is connected with the phosphorus steam filtering and dedusting part 13 in an inclined way, and a heater is arranged between the two sections of pipelines which are vertically upwards and obliquely downwards. However, the method is complex, the construction and use cost is high, and the compact design of the sludge phosphorus recovery treatment system is not facilitated.

In a preferred embodiment, as shown in fig. 1 and 4-5, the phosphorus vapor diversion part 12 is designed to integrally connect the phosphorus vapor outlet 115 on the casing of the phosphorus evaporation part 11 and the phosphorus vapor inlet 134 on the casing of the phosphorus vapor filtering and dust removing part 13 through a diversion channel 121 which is defined by the casing of the phosphorus vapor diversion part 12 from bottom to top and has no substantial turning section. The meaning of "from bottom to top and without substantial turns" is to be understood here in particular as: the whole drainage channel 121 is vertical, inclined or bent upwards, and the central connecting line of two ports of the drainage channel 121 is connected (the straight line is completely positioned in the drainage channel 121).

In general, the whole of the "flow guide channel 121 from bottom to top without substantial turning section" is vertical or inclined upward, and then the center of the phosphorus vapor output port 115 on the housing of the phosphorus vapor evaporation part 11 and the center of the phosphorus vapor input port 134 on the housing of the phosphorus vapor filtration and dust removal part 13 are connected to form a straight line which is vertically upward or inclined upward and is completely positioned in the flow guide channel 121.

The phosphorus vapor diversion part 12 in the above preferred embodiment can effectively avoid the problem of dust accumulation and blockage in the diversion channel 121, and at the same time, phosphorus vapor can rapidly pass through the diversion channel 121 in a very short path so as to prevent the phosphorus vapor from cooling and separating out liquid yellow phosphorus in the phosphorus vapor diversion part 12, thus avoiding installing a heater in the diversion channel 121 and reducing the cost and energy consumption. In addition, the phosphorus vapor diversion part 12 adapts to the compact design between the phosphorus vapor evaporation part 11 and the phosphorus vapor filtering and dedusting part 13, and the shell of the phosphorus vapor evaporation part 11, the shell of the phosphorus vapor diversion part 12 and the shell of the phosphorus vapor filtering and dedusting part 13 can be tightly connected together.

In specific implementation, the casing of the phosphorus vapor diversion part 12 may form a gas collecting hood 122, the gas collecting hood 122 may be formed by a hood surrounded by a first side wall 1201 and a second side wall 1202 or by a hood surrounded by the first side wall 1201 and the second side wall 1202 and a top wall 1203 arranged at the top of the hood, the first side wall 1201 is vertically arranged, and the second side wall 1202 is obliquely arranged and is obliquely arranged to ensure that the diversion channel 121 gradually converges from the phosphorus vapor output port 115 on the casing of the phosphorus sludge evaporation part 11 to the phosphorus vapor input port 134 on the casing of the phosphorus vapor filtration and dust removal part 13. When the gas collecting channel 122 is formed by a channel surrounded by the first side wall 1201 and the second side wall 1202, the gas collecting channel 122 has no top wall, and the upper and lower ends of the gas collecting channel 122 are directly connected to the sludge-phosphorus evaporation part 11 and the phosphorus vapor filtering and dedusting part 13, respectively. When the gas collecting hood 122 is composed of the hood body surrounded by the first side wall 1201 and the second side wall 1202 and the top wall 1203 arranged on the top of the hood body, it seems that there is a turn at the junction of the second side wall 1202 and the top wall 1203, but this does not substantially cause the turning of the flow guiding channel 121 to cause the collection of dust.

More specifically, the second side wall 1202 may be composed of a first second side wall 1202a, a second side wall 1202b, and a third second side wall 1202c, the first second side wall 1202a is disposed opposite to the second side wall 1202b, the third second side wall 1202c is disposed opposite to the first side wall 1201, and the first second side wall 1202a, the second side wall 1202b, the third second side wall 1202c, and the first side wall 1201 enclose a quadrangular frustum 123. As shown in fig. 1, 4-5, when the phosphorus vapor-directing part 12 is the quadrangular frustum 123, the material (e.g., steel plate) from which the quadrangular frustum 123 is made does not require a bending process, thereby saving the manufacturing cost and difficulty of the phosphorus vapor-directing part 12. Meanwhile, the quadrangular frustum 123 structure has high deformation resistance and structural strength, so that the sludge phosphorus recovery and treatment system is better in integrity.

Improved mode two of the sludge phosphorus recovery processing system embodiment 1

In the above system for recovering and treating sludge phosphorus, the tail gas generated by the mixing device 141 for mixing phosphorus steam and cooling liquid in the phosphorus steam cooling and phosphorus collecting part 14 may also contain acid gas, which is likely to cause damage to subsequent equipment and pollution discharge. In order to solve the problem, as shown in fig. 6, in a preferred embodiment, the phosphorus steam cooling and phosphorus recovery part 14 further includes a tail gas and alkali liquor mixing device 142, the tail gas and alkali liquor mixing device 142 has a second gas-liquid mixing cavity 1405 for mixing tail gas and alkali liquor, and a tail gas input port and a tail gas output port which are respectively connected with the second gas-liquid mixing cavity 1405, and the tail gas input port is connected with the tail gas output port 1404 of the phosphorus steam and cooling liquid mixing device 141.

The tail gas and alkali liquor mixing device 142 of the phosphorus steam cooling phosphorus recovery part 14 is used for receiving the tail gas discharged from the phosphorus steam and cooling liquid mixing device 141, absorbing acid gas in the tail gas through alkali liquor, and then discharging the tail gas through a tail gas outlet of the tail gas and alkali liquor mixing device 142. The second gas-liquid mixing cavity 1405 generally sprays alkali liquor to the tail gas in a spraying mode to realize gas-liquid mixing. Of course, the second gas-liquid mixing cavity 1405 can realize gas-liquid mixing in any other possible manner.

In order to make the structure of the phosphorus vapor cooling and receiving part 14 more compact, the housing of the phosphorus vapor and cooling liquid mixing device 141 and the housing of the tail gas and alkali liquid mixing device 142 can also be integrated. For example, in FIG. 6, the right side wall of the phosphorus vapor and cooling liquid mixing device 141 and the left side wall of the off-gas and lye mixing device 142 share the same side wall, so that the off-gas output port 1404 of the phosphorus vapor and cooling liquid mixing device 141 actually doubles as the off-gas input port of the off-gas and lye mixing device 142.

Sludge phosphorus evaporation part (device) of sludge phosphorus recovery processing system

The foregoing has described: a material mechanical conveying device 111 and a material heating device 112 arranged along the conveying direction of the material mechanical conveying device 111 are arranged in the shell of the phosphorus sludge evaporation part 11, and a phosphorus sludge input port 113 connected with the feeding part of the material mechanical conveying device 111, a phosphorus sludge evaporation residual material discharge port 114 connected with the discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with the exhaust part of the material mechanical conveying device 111 are respectively arranged on the shell of the phosphorus sludge evaporation part 11. The phosphorus sludge evaporation part 11 is used for receiving externally conveyed phosphorus sludge, the phosphorus sludge enters the material mechanical conveying device 111 through the feeding part of the material mechanical conveying device 111 and is conveyed in the direction indicated by an arrow D1 through the material mechanical conveying device 111, the phosphorus sludge on the material mechanical conveying device 111 is heated by the material heating device 112 in the conveying process, and P in the phosphorus sludge is₄The phosphorus vapor evaporated is discharged from the discharge part of the mechanical material conveying device 111 and then from the phosphorus vapor outlet 115, and as the phosphorus sludge is evaporated, the residual phosphorus evaporation material (such as phosphorus pentoxide) is formed into dry slag and discharged from the discharge part of the mechanical material conveying device 111 and the residual phosphorus sludge evaporation material discharge opening 114.

In designing the internal structure of the specific sludge phosphorus evaporating section 11, the inventors considered: firstly, the inside of the sludge phosphorus evaporation part 11 is in a high-temperature and high-pressure environment, so that phosphorus steam is easy to leak, and a large potential safety hazard is caused by the leakage of the phosphorus steam; secondly, the conventional mechanical material conveying device (such as a spiral conveyor and the like) often has poor material dispersing effect, so that the evaporation efficiency of the sludge phosphorus is low; thirdly, during the operation of the phosphorus sludge evaporation part 11, as phosphorus sludge is evaporated, the residual phosphorus evaporation materials (phosphorus pentoxide, etc.) are formed into dry slag and discharged from the discharge part of the material mechanical conveying device 111 and the discharge opening 114 of the residual phosphorus sludge evaporation materials, and during the discharge of the residual phosphorus sludge evaporation materials, there is a safety risk caused by gas leakage. Then, the inventors have studied and proposed several improvements to the sludge phosphorus evaporation section 11, which can be applied to the sludge phosphorus evaporation section 11 in whole or in part.

Improvement point one

As shown in fig. 4-5, a material mechanical conveying device 111 and a material heating device 112 arranged along the conveying direction of the material mechanical conveying device 111 are arranged in the casing 116 of the phosphorous sludge evaporation part 11, a phosphorous sludge input port 113 connected with the input part of the material mechanical conveying device 111, a phosphorous sludge evaporation residual material discharge port 114 connected with the output part of the material mechanical conveying device 111, and a phosphorous steam output port 115 connected with the exhaust part of the material mechanical conveying device 111 are respectively arranged on the casing 116 of the phosphorous sludge evaporation part 11, furthermore, the material mechanical conveying device 111 comprises a hermetic sealing liner 1111 located in the casing 116 and a material conveyor 1112 located in the hermetic sealing liner 1111, and the input part, the output part and the exhaust part are respectively arranged on the hermetic sealing liner 1111.

The material conveyor 1112 essentially functions to convey the material (phosphorous sludge), and since the material conveyor 1112 is located in the airtight inner container 1111, the phosphorous sludge is conveyed, heated and evaporated on the material conveyor 1112 in the airtight inner container 1111. The airtight inner container 1111 can adopt containers such as high-temperature and high-pressure resistant steel pressure containers and the like capable of achieving the airtight effect, so that phosphorus vapor leakage can be basically stopped, and potential safety hazards caused by phosphorus vapor leakage can be eliminated.

Specifically, the hermetic liner 1111 may be integrally connected to the bottom of the gas collecting hood 122, for example, the exhaust opening of the hermetic liner 1111 may be welded to the first second sidewall 1202a, the second sidewall 1202b, the third second sidewall 1202c and the first sidewall 1201 of the gas collecting hood 122. In this case, the casing 116 of the phosphorus sludge evaporation section 11 can be made of heat-resistant insulating material, such as insulating brick. When the airtight inner container 1111 is made of a steel pressure container, the shape of the airtight inner container 1111 can be designed and manufactured to be highly matched with the shape of the material conveyor 1112, so that the overall structure of the sludge phosphorus evaporation part 11 can be more compact.

Improvement point two

As shown in fig. 4-5, a material mechanical conveying device 111 and a material heating device 112 arranged along the conveying direction of the material mechanical conveying device 111 are arranged in the casing 116 of the phosphorous slurry evaporation part 11, a phosphorous slurry inlet 113 connected to the feeding part of the material mechanical conveying device 111, a phosphorous slurry evaporation residual material discharge opening 114 connected to the discharging part of the material mechanical conveying device 111, and a phosphorous vapor outlet 115 connected to the exhaust part of the material mechanical conveying device 111 are respectively arranged on the casing 116 of the phosphorous slurry evaporation part 11, furthermore, the material mechanical conveying device 111 comprises a material conveyor 1112, the material conveyor 1112 has a conveying part 1112b arranged on the surface of the material conveying base 1112a and a transmission part for driving the conveying part 1112b, the conveying part 1112b is movable along the conveying direction of the material mechanical conveying device 111 under the driving of the transmission part and moves to make the material pass through the conveying direction of the material mechanical conveying device 111 The material is dispersed on the material conveying base 1112a and acts on the material to convey the material.

The material conveying base 1112a is configured to provide a surface (preferably a flat surface) so that the conveying member 1112b can disperse the material (phosphorous slurry) on the material conveying base 1112 a. That is, the material conveying base 1112a and the conveying member 1112b are relatively moved, and when the conveying member 1112b moves on the material conveying base 1112a, the material (phosphorus sludge) on the material conveying base 1112a can be dispersed. Generally, the conveying members 1112b are arranged to fit the top of the material conveying base 1112a, so that the material (phosphorus sludge) can be distributed uniformly over the top of the material conveying base 1112a by the conveying members 1112 b. In addition, the material heating device 112 may be located below the material conveying base 1112a, and the shape or arrangement of the material heating device 112 may also be fitted to the top of the material conveying base 1112 a.

Specifically, the transmission member may include a wrap-around transmission member having a driving wheel 1112c and a driven wheel 1112d disposed opposite to each other in the conveying direction, and a transmission chain 1112e or a transmission belt wrapped around both the driving wheel 1112c and the driven wheel 1112 d; the wrap around drive component is located above the side of the material transport base 1112 a; the conveying components 1112b are arranged on the transmission chain 1112e or the transmission belt at intervals and above the material conveying base 1112 a. In a preferred embodiment, the conveying member 1112b employs a scraper disposed in a direction transverse to the conveying direction; at this time, the scraper blades are arranged on the transmission chain 1112e or the transmission belt at intervals along the conveying direction to form a grid-shaped scraping structure, and the grid-shaped scraping structure can better disperse and convey the materials on the surface of the material conveying base 1112 a. As shown in fig. 5, in general, the transmission member includes the wrap transmission members oppositely disposed at both sides of the conveying direction, in which case both ends of the squeegee may be connected to the wrap transmission members oppositely disposed at both sides of the conveying direction, respectively. The corresponding driving wheels 1112c and the corresponding driven wheels 1112d of the wrap around transmission members oppositely arranged on both sides of the conveying direction may be respectively mounted on corresponding rotating shafts 1112f, and the rotating shafts 1112f may be mounted in the housing 116 of the sludge phosphorus evaporation section 11 through bearings.

Furthermore, the conveying components 1112b may also be distributed along the entire circumference of the driving chain 1112e or the driving belt, so that the material conveying base 1112b forms a conveying component connecting ring in which the outlet of the feeding portion is located. When the conveying members 1112b are distributed along the entire circumference of the transmission chain 1112e or the transmission belt so that the material conveying base 1112b forms a conveying member connecting ring, the conveying members 1112b can continuously act on the material, and since the outlet of the feeding portion is located in the conveying member connecting ring, the feeding portion does not affect the rotation of the conveying member connecting ring.

Improvement point three

As shown in fig. 4-5, a material mechanical conveying device 111 and a material heating device 112 arranged along the conveying direction of the material mechanical conveying device 111 are arranged in the casing 116 of the phosphorous slurry evaporation part 11, a phosphorous slurry inlet 113 connected to the feeding part of the material mechanical conveying device 111, a phosphorous slurry evaporation residual material discharge opening 114 connected to the discharging part of the material mechanical conveying device 111, and a phosphorous vapor outlet 115 connected to the exhaust part of the material mechanical conveying device 111 are respectively arranged on the casing 116 of the phosphorous slurry evaporation part 11, furthermore, the material mechanical conveying device 111 comprises a material conveyor 1112, the material conveyor 1112 has a conveying part 1112b arranged on the surface of the material conveying base 1112a and a transmission part for driving the conveying part 1112b, and the conveying part 1112b can move along the conveying direction of the material mechanical conveying device 111 under the driving of the transmission part and acts on the conveying direction of the material mechanical conveying device 111 when moving through the transmission part 1112b A material conveying base 1112a having a width extending transversely of the conveying direction of the material mechanical conveyor; and the feeding part is provided with a material distribution structure used for distributing materials in the transverse direction of the conveying direction of the material mechanical conveying device. The material distribution structure can distribute the materials (phosphorus sludge) in the width direction of the material conveying base 1112a, so that the materials can be more dispersedly paved on the material conveying base 1112a, the uniformity of material heating is improved, and the evaporation efficiency is further improved.

Specifically, the distributing structure includes a distributing pipe 1112g located above the material conveying base 1112a and avoiding the conveying component 1112b and extending in the transverse direction of the conveying direction of the mechanical material conveying device 111, and the distributing pipe 1112g is provided with distributing openings 1112h distributed in the transverse direction of the conveying direction of the mechanical material conveying device 111.

Improvement point four

As shown in fig. 4-5, a material mechanical conveying device 111 and a material heating device 112 arranged along the conveying direction of the material mechanical conveying device 111 are arranged in the housing 116 of the sludge-phosphorus evaporating part 11, the shell 116 of the phosphorus sludge evaporation part 11 is respectively provided with a phosphorus sludge input port 113 connected with the feeding part of the material mechanical conveying device 111, a phosphorus sludge evaporation residual material discharge port 114 connected with the discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with the exhaust part of the material mechanical conveying device 111, wherein the sludge phosphorus evaporation residue material discharge port 114 is connected to an intermediate hopper 1172 through a first discharge valve 1171, the intermediate stocker 1172 is provided with a gas substitution device 1174 for injecting a safe substitution gas into the intermediate stocker 1172 and a second discharge valve 1173 for discharging the material in the intermediate stocker 1172.

Since the discharge port 114 for the residual sludge-phosphorus evaporation material is connected to the intermediate stocker 1172 through the first discharge valve 1171, and the intermediate stocker 1172 is provided with the gas substitution device 1174 for injecting the safety substitution gas into the intermediate stocker 1172 and the second discharge valve 1173 for discharging the material in the intermediate stocker 1172, after the residual sludge-phosphorus evaporation material enters the intermediate stocker 1172 through the first discharge valve 1171, the gas substitution device 1174 is opened to inject the inert gas into the intermediate stocker 1172, and after the substitution with the inert gas is completed, the second discharge valve 1173 is opened to discharge the residual sludge-phosphorus evaporation material on the basis of closing the first discharge valve 1171, thereby preventing the air from entering the sludge-phosphorus evaporation section 11.

Specifically, the intermediate stocker 1172 may employ a first discharge valve connected to a tapered tube having a larger side tube diameter and a second discharge valve connected to a tapered tube having a smaller side tube diameter; also, the first discharge valve 1171 may adopt a discharge valve matched with a larger pipe diameter of a connection side of a first discharge valve of the intermediate hopper, and the second discharge valve 1173 may adopt a discharge valve matched with a smaller pipe diameter of a connection side of a second discharge valve of the intermediate hopper. The intermediate hopper 1172 is designed as a tapered tube as described above to allow smooth discharge of the intermediate hopper 1172.

Embodiment 2 of sludge phosphorus recovery system

Fig. 2 is a schematic structural diagram of an embodiment of the sludge phosphorus recovery processing system. Fig. 7 is a sectional view (schematic view) taken along line D-D in fig. 2. As shown in fig. 2 and 7, a sludge phosphorus recovery processing system comprises: a sludge phosphorus evaporation part 11, a phosphorus steam filtering and dedusting part 13, a phosphorus steam diversion part 12, a phosphorus steam cooling and phosphorus collection part 14 and a phosphorus steam driving part 15 (the phosphorus steam driving part 15 is not shown in figure 2).

A material mechanical conveying device 111 and a material heating device 112 arranged along the conveying direction of the material mechanical conveying device 111 are arranged in the shell of the phosphorus sludge evaporation part 11, and a phosphorus sludge input port 113 connected with the feeding part of the material mechanical conveying device 111, a phosphorus sludge evaporation residual material discharge port 114 connected with the discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with the exhaust part of the material mechanical conveying device 111 are respectively arranged on the shell of the phosphorus sludge evaporation part 11.

A filter element 131 capable of tolerating the temperature of phosphorus steam is arranged in the shell of the phosphorus steam filtering and dedusting part 13, the filter element 131 divides the interior of the phosphorus steam filtering and dedusting part 13 into an original air chamber 132 and an air purifying chamber 133, and a phosphorus steam inlet 134 connected with the original air chamber 132 and a phosphorus steam outlet connected with the air purifying chamber 133 are respectively arranged on the shell of the phosphorus steam filtering and dedusting part 13.

The phosphorus vapor diversion part 12 is arranged between the phosphorus sludge evaporation part 11 and the phosphorus vapor filtering and dedusting part 13, and a phosphorus vapor output port 115 on the casing of the phosphorus sludge evaporation part 11 and a phosphorus vapor input port 134 on the casing of the phosphorus vapor filtering and dedusting part 13 are connected together through a diversion channel 121 defined by the casing of the phosphorus vapor diversion part 12.

In addition, phosphorus steam cooling receives phosphorus part 14 still includes tail gas and alkali lye mixing arrangement 142, tail gas and alkali lye mixing arrangement 142 has the second gas-liquid mixing chamber 1405 that is used for carrying out the mixture with tail gas and alkali lye and respectively with this second gas-liquid mixing chamber 1405 connection's tail gas input port and tail gas delivery outlet, the tail gas input port with the tail gas delivery outlet 1404 of phosphorus steam and coolant liquid mixing arrangement 141 is connected.

The phosphorus vapor driving part 15 comprises an air flow driving device 151, and the air flow driving device 151 is arranged between a phosphorus vapor input port 1402 of the phosphorus vapor and cooling liquid mixing device 141 and a phosphorus vapor output port on the shell of the phosphorus vapor filtering and dust removing part 13 or behind a tail gas output port 1404 of the phosphorus vapor and cooling liquid mixing device 141 and used for driving the phosphorus vapor to flow through mechanical suction. Generally, the airflow driving device 151 may employ a fan.

The same or similar scheme can be adopted for the sludge phosphorus evaporation part 11, the phosphorus vapor filtering and dedusting part 13 and the phosphorus vapor diversion part 12 of the sludge phosphorus recovery processing system of the embodiment, but the phosphorus vapor cooling and phosphorus recovery part 14 and the phosphorus vapor driving part 15 of the sludge phosphorus recovery processing system of the embodiment are improved.

As shown in fig. 7, in the phosphorus vapor cooling phosphorus recovery part 14 and the phosphorus vapor driving part 15, the phosphorus vapor between the phosphorus vapor input port and the tail gas output port of the phosphorus vapor and cooling liquid mixing device 141 has to pass below the liquid level of the cooling liquid maintained in the first gas-liquid mixing chamber 1401, and the tail gas between the tail gas input port of the tail gas and alkali liquid mixing device 142 and the tail gas output port of the tail gas and alkali liquid mixing device 1401 has to pass below the liquid level of the cooling liquid maintained in the second gas-liquid mixing chamber 1405; the vacuum pump or the water ring vacuum pump is arranged behind a tail gas output port of the tail gas and alkali liquor mixing device; the gas flow driving device 151 adopts a vacuum pump or a water ring vacuum pump, and the vacuum pump or the water ring vacuum pump is arranged behind the tail gas output port of the phosphorus vapor and cooling liquid mixing device 142.

In addition, the shell of the phosphorus steam cooling and phosphorus receiving part 14 and the shell of the phosphorus steam filtering and dust removing part 13 are connected into a whole, and a heat insulation structure is arranged between the phosphorus steam cooling and phosphorus receiving part 14 and the phosphorus steam filtering and dust removing part 13.

The phosphorus steam cooling and phosphorus recovery part 14 realizes the mixing of phosphorus steam and cooling liquid and the mixing of tail gas and alkali liquor in a water bath-like mode, so that gas can be more fully contacted with liquid. Since the gas flow driving device 151 employs a vacuum pump or a water ring vacuum pump (preferably, a water ring vacuum pump), the suction force is large, and it is possible to ensure that gas passes through the first gas-liquid mixing chamber 1401 and the second gas-liquid mixing chamber 1405.

Embodiment 3 of sludge phosphorus recovery system

Fig. 3 is a schematic structural diagram of an embodiment of the sludge phosphorus recovery processing system. As shown in fig. 3, a phosphorus sludge recycling system includes: a phosphorus sludge evaporation part 11, a phosphorus vapor filtering and dedusting part 13, a phosphorus vapor diversion part 12, a phosphorus vapor cooling and phosphorus collecting part 14 and a phosphorus vapor driving part 15 (the phosphorus vapor driving part 15 is not shown in figure 3).

The same or similar scheme can be adopted for the sludge phosphorus evaporation part 11, the phosphorus steam filtering and dedusting part 13, the phosphorus steam cooling and phosphorus collecting part 14 and the phosphorus steam driving part 15 of the sludge phosphorus recovery processing system of the embodiment, but the phosphorus steam diversion part 12 of the sludge phosphorus recovery processing system of the embodiment is improved.

As shown in FIG. 3, the phosphorus vapor diversion part 12 actually directly utilizes the housing of the phosphorus vapor filtering and dedusting part 13, and the phosphorus vapor outlet 115 of the phosphorus vapor diversion part 12 is positioned right below the cylinder of the phosphorus vapor filtering and dedusting part 13. Thus, the dust filtered by the phosphorus vapor dust-removing filter 13 can be discharged together through the sludge phosphorus evaporation section 11.

The contents of the present application are explained above. Those of ordinary skill in the art will be able to implement the present application based on these teachings. All other embodiments, which can be derived by a person skilled in the art from the above description without inventive step, shall fall within the scope of protection of the present application.

Claims

1. A phosphorus sludge recovery processing system is characterized by comprising:

the device comprises a mud phosphorus evaporation part, wherein a material mechanical conveying device and a material heating device arranged along the conveying direction of the material mechanical conveying device are arranged in a shell of the mud phosphorus evaporation part, and a mud phosphorus input port connected with a feeding part of the material mechanical conveying device, a mud phosphorus evaporation residual material discharge port connected with a discharging part of the material mechanical conveying device and a phosphorus steam output port connected with an exhaust part of the material mechanical conveying device are respectively arranged on the shell of the mud phosphorus evaporation part;

the device comprises a phosphorus steam filtering and dust removing part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dust removing part, the filter element divides the interior of the phosphorus steam filtering and dust removing part into a raw air chamber and an air purifying chamber, and a phosphorus steam input port connected with the raw air chamber and a phosphorus steam output port connected with the air purifying chamber are respectively arranged on the shell of the phosphorus steam filtering and dust removing part;

the phosphorus steam flow guiding part is arranged between the phosphorus sludge evaporation part and the phosphorus steam filtering and dedusting part, and a phosphorus steam output port on the shell of the phosphorus sludge evaporation part and a phosphorus steam input port on the shell of the phosphorus steam filtering and dedusting part are connected together through a flow guiding channel limited by the shell of the phosphorus steam flow guiding part;

the phosphorus steam cooling and phosphorus receiving part comprises a phosphorus steam and cooling liquid mixing device, the phosphorus steam and cooling liquid mixing device is provided with a first gas-liquid mixing chamber, a phosphorus steam input port and a tail gas output port which are respectively connected with the first gas-liquid mixing chamber, and a yellow phosphorus collecting tank positioned at the bottom of the first gas-liquid mixing chamber, the phosphorus steam input port of the phosphorus steam and cooling liquid mixing device is connected with a phosphorus steam output port on a shell of the phosphorus steam filtering and dedusting part, the phosphorus steam cooling and phosphorus receiving part also comprises a tail gas and alkali liquid mixing device, the tail gas and alkali liquid mixing device is provided with a second gas-liquid mixing chamber, a tail gas input port and a tail gas output port which are respectively connected with the second gas-liquid mixing chamber, and the tail gas input port is connected with the tail gas output port of the phosphorus steam and cooling liquid mixing device;

and the phosphorus steam driving part comprises an air flow driving device, and the air flow driving device is arranged between a phosphorus steam input port of the phosphorus steam and cooling liquid mixing device and a phosphorus steam output port on a shell of the phosphorus steam filtering and dust removing part or behind a tail gas output port of the phosphorus steam and cooling liquid mixing device and is used for driving the phosphorus steam to flow through mechanical suction.

2. The system of claim 1, wherein: and the phosphorus steam drainage part connects a phosphorus steam output port on the shell of the mud phosphorus evaporation part and a phosphorus steam input port on the shell of the phosphorus steam filtering and dedusting part into a whole through a drainage channel which is limited by the shell of the phosphorus steam drainage part from bottom to top and has no substantial turning section.

3. The system of claim 2, wherein: the casing of phosphorus steam drainage part constitutes the gas collecting channel, the gas collecting channel comprises the cover body that first lateral wall and second lateral wall enclose or the cover body that first lateral wall and second lateral wall enclose and the roof of setting at this cover body top constitute, first lateral wall is vertical setting, the second lateral wall is the slope setting and the slope mode ensures that the drainage channel follows phosphorus steam delivery outlet on the casing of phosphorus mud evaporation part to phosphorus steam filters the upper phosphorus steam input port direction of dust removal part's casing and converges gradually.

4. The system of claim 3, wherein: the second lateral wall comprises first second lateral wall, second lateral wall and third second lateral wall, first second lateral wall with second lateral wall sets up relatively, the third second lateral wall with first lateral wall sets up relatively, first second lateral wall, second lateral wall, third second lateral wall and first lateral wall enclose into a four arris platform.

5. The system according to any one of claims 1-4, wherein: the material mechanical conveying device comprises an airtight inner container positioned in the shell and a material conveyor positioned in the airtight inner container, and the feeding part, the discharging part and the exhausting part are respectively arranged on the airtight inner container.

6. The system according to any one of claims 1-4, wherein: the material mechanical conveying device comprises a material conveyor, the material conveyor is provided with a conveying part and a transmission part, the conveying part is arranged on the surface of a material conveying base platform, the transmission part is used for driving the conveying part, and the conveying part can move along the conveying direction of the material mechanical conveying device under the driving of the transmission part and acts on materials in a mode of dispersing the materials on the material conveying base platform during movement so as to realize material conveying.

7. The system according to any one of claims 1-4, wherein: the material mechanical conveying device comprises a material conveyor, the material conveyor is provided with a conveying part arranged on the surface of a material conveying base station and a transmission part for driving the conveying part, and the conveying part can move along the conveying direction of the material mechanical conveying device under the driving of the transmission part and acts on materials during movement to realize material conveying; the transmission part comprises a wrapping transmission part which is provided with a driving wheel and a driven wheel which are oppositely arranged in the conveying direction and a transmission chain or a transmission belt which is wrapped on the driving wheel and the driven wheel; the wrap-around drive component is positioned laterally above the material transport platform; the conveying components are arranged on the transmission chain or the transmission belt at intervals and are positioned above the material conveying base platform.

8. The system of claim 7, wherein: the conveying component adopts a scraper plate which is arranged perpendicular to the conveying direction; the transmission parts comprise the wrapping transmission parts which are oppositely arranged at two sides of the conveying direction; and two ends of the scraper are respectively connected with the wrapping type transmission parts which are oppositely arranged at two sides of the conveying direction.

9. The system according to any one of claims 1-4, wherein: the shell of the phosphorus steam and cooling liquid mixing device and the shell of the tail gas and alkali liquor mixing device are connected into a whole.

10. The system according to any one of claims 1-4, wherein: the shell of the phosphorus steam cooling and receiving part is connected with the shell of the phosphorus steam filtering and dedusting part into a whole, and a heat insulation structure is arranged between the phosphorus steam cooling and receiving part and the phosphorus steam filtering and dedusting part.