CN114314536B

CN114314536B - Mud phosphorus evaporation plant

Info

Publication number: CN114314536B
Application number: CN202111486622.6A
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: 2024-02-02
Anticipated expiration: 2041-12-07
Also published as: CN114314536A

Abstract

The invention discloses a phosphorus mud evaporation device, which comprises: the shell is respectively provided with a phosphorus mud input port, a phosphorus mud evaporation residual substance discharge port and a phosphorus steam output port; the material mechanical conveying device is arranged in the shell, a feeding part of the material mechanical conveying device is connected with the phosphorus mud input port, a discharging part of the material mechanical conveying device is connected with the phosphorus mud evaporation residual substance discharge 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 located in the shell 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 conveying, heating and evaporating of the sludge phosphorus are all carried out in the airtight inner container.

Description

Mud phosphorus evaporation plant

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

Sludge phosphorus is a main byproduct in yellow phosphorus production, and belongs to dangerous solid waste in phosphorus chemical industry. The applicant of the present application provides a method for treating sludge phosphorus by means of liquid membrane filtration technology in patent document CN103213958A, CN103213959a, etc., but such a method still requires treatment of the filtered sludge impurities.

Disclosure of Invention

The purpose of the application is to provide a mud phosphorus recovery processing system, a mud phosphorus evaporation system, a mud phosphorus recovery processing method and a mud phosphorus evaporation device to solve the technical problem that more conveniently retrieve phosphorus resources from mud phosphorus.

In order to solve the technical problem, according to a first aspect of the application, a sludge phosphorus recovery treatment system is provided. Comprising the following steps: the device comprises a mud phosphorus evaporation part, wherein a shell of the mud phosphorus evaporation part is internally provided with a material mechanical conveying device and a material heating device which is arranged along the conveying direction of the material mechanical conveying device, and the shell of the mud phosphorus evaporation part is respectively provided with 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; the device comprises a phosphorus steam filtering and dedusting part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dedusting part, the filter element divides the interior of the phosphorus steam filtering and dedusting part into an original air chamber and a clean air chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the clean air chamber are respectively arranged on the shell of the phosphorus steam filtering and dedusting part; the phosphorus steam drainage part is arranged between the phosphorus vapor evaporation part and the phosphorus steam filtering and dust removing part, and a phosphorus steam output port on the shell of the phosphorus vapor evaporation part and a phosphorus steam input port on the shell of the phosphorus steam filtering and dust removing part are connected into a whole through a drainage channel which is defined by the shell of the phosphorus steam drainage part and is from bottom to top and has no substantial turning section; the phosphorus steam cooling and collecting part is characterized in that a phosphorus steam and cooling liquid mixing device is arranged in a shell of the phosphorus steam cooling and collecting 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, wherein the 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 the phosphorus steam driving part comprises an airflow driving device, and the airflow 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 is arranged behind a tail gas output port of the phosphorus steam and cooling liquid mixing device and is used for driving phosphorus steam to flow through mechanical suction.

Optionally, the center of the phosphorus steam outlet on the shell of the phosphorus mud evaporation part and the center of the phosphorus steam inlet on the shell of the phosphorus steam filtering and dust removing 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 shell 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 comprises the cover body that first lateral wall and second lateral wall enclose and the roof that sets up at this cover body top, first lateral wall is vertical setting, the second lateral wall is slope setting and slope mode and ensures the drainage passageway is followed phosphorus steam delivery outlet on the shell of phosphorus mud evaporation part to phosphorus steam inlet direction gradually converges on the shell of phosphorus steam filtration dust removal part.

Optionally, the second side wall is formed by a first second side wall, a second side wall and a third second side wall, the first second side wall is opposite to the second side wall, the third second side wall is opposite to the first side wall, and the first second side wall, the third second side wall and the first side wall enclose a quadrangular frustum of a prism.

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

Optionally, the mechanical material conveying device comprises an airtight liner in the shell and a material conveyor in the airtight liner, and the feeding part, the discharging part and the exhaust part are respectively arranged on the airtight liner.

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 in a manner of enabling the material to be dispersed on the material conveying base to realize material conveying when moving.

Optionally, 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 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 to realize material conveying during movement; the transmission part comprises a wrapping type transmission part, wherein the wrapping type transmission part is provided with a driving wheel, a driven wheel and a transmission chain or a transmission belt, wherein the driving wheel and the driven wheel are oppositely arranged in the transmission direction, and the transmission chain or the transmission belt is wrapped on the driving wheel and the driven wheel at the same time; the wrapping type transmission part is positioned above the side of the material conveying base; the conveying components are arranged on the transmission chain or the transmission belt at intervals and are positioned above the material conveying base station.

In order to solve the technical problem, according to a second aspect of the present application, a phosphorus mud evaporation system is provided. Comprising the following steps: the device comprises a mud phosphorus evaporation part, wherein a shell of the mud phosphorus evaporation part is internally provided with a material mechanical conveying device and a material heating device which is arranged along the conveying direction of the material mechanical conveying device, and the shell of the mud phosphorus evaporation part is respectively provided with 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; the device comprises a phosphorus steam filtering and dedusting part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dedusting part, the filter element divides the interior of the phosphorus steam filtering and dedusting part into an original air chamber and a clean air chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the clean air chamber are respectively arranged on the shell of the phosphorus steam filtering and dedusting part; and the phosphorus steam drainage part is arranged between the phosphorus vapor evaporation part and the phosphorus steam filtering and dedusting part, and connects a phosphorus steam output port on the shell of the phosphorus vapor evaporation part with 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 and is from bottom to top and has no substantial turning section.

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

In order to solve the technical problem, according to a fourth aspect of the present application, a sludge phosphorus recovery processing system is provided. Comprising the following steps: the device comprises a mud phosphorus evaporation part, wherein a shell of the mud phosphorus evaporation part is internally provided with a material mechanical conveying device and a material heating device which is arranged along the conveying direction of the material mechanical conveying device, and the shell of the mud phosphorus evaporation part is respectively provided with 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; the device comprises a phosphorus steam filtering and dedusting part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dedusting part, the filter element divides the interior of the phosphorus steam filtering and dedusting part into an original air chamber and a clean air chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the clean air chamber are respectively arranged on the shell of the phosphorus steam filtering and dedusting part; the phosphorus steam drainage part is arranged between the phosphorus vapor evaporation part and the phosphorus steam filtering and dust removing part, and a phosphorus steam output port on the shell of the phosphorus vapor evaporation part is connected with a phosphorus steam input port on the shell of the phosphorus steam filtering and dust removing part through a drainage channel defined by the shell of the phosphorus steam drainage part; the phosphorus vapor cooling and collecting part is characterized in that a phosphorus vapor and cooling liquid mixing device is arranged in a shell of the phosphorus vapor cooling and collecting part, the phosphorus vapor and cooling liquid mixing device is provided with a first gas-liquid mixing cavity for mixing phosphorus vapor and cooling liquid, a phosphorus vapor 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 vapor input port of the phosphorus vapor and cooling liquid mixing device is connected with a phosphorus vapor output port on the shell of the phosphorus vapor filtering and dust removing part, and phosphorus vapor between the phosphorus vapor input port and the tail gas output port of the phosphorus vapor and cooling liquid mixing device is required to pass through the lower part of 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, wherein 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 drainage part connects the phosphorus steam output port on the shell of the phosphorus mud evaporation part with the phosphorus steam input port on the shell of the phosphorus steam filtering dust removal part into a whole through a drainage channel which is limited by the shell of the phosphorus steam drainage part and is from bottom to top and has no substantial turning section.

Optionally, the conveying component adopts a scraper which is perpendicular to the conveying direction; the transmission part comprises wrapping transmission parts which are oppositely arranged at two sides of the conveying direction; the two ends of the scraping plate are respectively connected with the wrapping type transmission parts which are oppositely arranged at the 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 cavity for mixing the 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, 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 liquid mixing device, and the 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 the cooling liquid maintained in the second gas-liquid mixing cavity; the vacuum pump or the water ring vacuum pump is arranged behind the tail gas output port of the tail gas and alkali liquid mixing device.

Optionally, the shell of the phosphorus vapor cooling and collecting part and the shell of the phosphorus vapor filtering and dedusting part are connected into a whole, and a heat insulation structure is arranged between the phosphorus vapor cooling and collecting part and the phosphorus vapor filtering and dedusting part.

In order to solve the technical problem, according to a fifth aspect of the present application, a sludge phosphorus recovery processing system is provided. Comprising the following steps: the device comprises a mud phosphorus evaporation part, wherein a shell of the mud phosphorus evaporation part is internally provided with a material mechanical conveying device and a material heating device which is arranged along the conveying direction of the material mechanical conveying device, and the shell of the mud phosphorus evaporation part is respectively provided with 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; the device comprises a phosphorus steam filtering and dedusting part, wherein a filter element capable of tolerating the temperature of phosphorus steam is arranged in a shell of the phosphorus steam filtering and dedusting part, the filter element divides the interior of the phosphorus steam filtering and dedusting part into an original air chamber and a clean air chamber, and a phosphorus steam input port connected with the original air chamber and a phosphorus steam output port connected with the clean air chamber are respectively arranged on the shell of the phosphorus steam filtering and dedusting part; the phosphorus steam drainage part is arranged between the phosphorus vapor evaporation part and the phosphorus steam filtering and dust removing part, and a phosphorus steam output port on the shell of the phosphorus vapor evaporation part is connected with a phosphorus steam input port on the shell of the phosphorus steam filtering and dust removing part through a drainage channel defined by the shell of the phosphorus steam drainage 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 cavity for mixing phosphorus steam and cooling liquid, a phosphorus steam input port, a tail gas output port and a yellow phosphorus collecting tank, the phosphorus steam input port and the tail gas output port are respectively connected with the first gas-liquid mixing cavity, the yellow phosphorus collecting tank is positioned at the bottom of the first gas-liquid mixing cavity, the phosphorus steam input port of the phosphorus steam and cooling liquid mixing device is connected with the phosphorus steam output port on the shell of the phosphorus steam filtering and dust removing 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 cavity for mixing the tail gas and alkali liquid, and a tail gas input port and a tail gas output port are respectively connected with the second gas-liquid mixing cavity, and the tail gas output port of the phosphorus steam and cooling liquid mixing device are connected; and the phosphorus steam driving part comprises an airflow driving device, and the airflow 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 is arranged behind a tail gas output port of the phosphorus steam and cooling liquid mixing device and is used for driving phosphorus steam to flow through mechanical suction.

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

In order to solve the technical problem, according to a sixth aspect of the present application, a phosphorus mud evaporation device is provided. Comprising the following steps: the shell is respectively provided with a phosphorus mud input port, a phosphorus mud evaporation residual substance discharge port and a phosphorus steam output port; the material mechanical conveying device is arranged in the shell, the feeding part of the material mechanical conveying device is connected with the phosphorus mud input port, the discharging part of the material mechanical conveying device is connected with the phosphorus mud evaporation residual substance discharge port, and the 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 located in the shell 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.

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 to realize material conveying when moving.

Optionally, the material conveying base is provided by an inner bottom wall of the airtight liner or is 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 to realize material conveying when in movement; the transmission part comprises a wrapping type transmission part, wherein the wrapping type transmission part is provided with a driving wheel, a driven wheel and a transmission chain or a transmission belt, wherein the driving wheel and the driven wheel are oppositely arranged in the transmission direction of the material mechanical transmission device, and the transmission chain or the transmission belt is wrapped on the driving wheel and the driven wheel at the same time; the wrapping type transmission part is positioned above the side of the material conveying base; 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 member employs a scraper disposed transversely to the conveying direction; the scraping plates are arranged on the transmission chain or the transmission belt at intervals along the transmission direction to form a grid-shaped scraping structure.

Optionally, the transmission component comprises wrapping transmission components oppositely arranged at two sides of the conveying direction; the two ends of the scraping plate are respectively connected with the wrapping type transmission parts which are oppositely arranged at the 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, 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 the shape of the wrapping type transmission part 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 liner; 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 evaporating section.

Optionally, the phosphorus steam outlet and the exhaust part below the phosphorus steam outlet 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 upward gradually convergent opening, and the bottom of the gas collecting hood is connected with the airtight inner container in an airtight manner into a whole; and/or a feed inlet is arranged on the side wall of the feeding part on the airtight inner container, and the phosphorus mud input port is connected with the feed inlet; and/or a discharge port is arranged on the bottom wall of the discharging part on the airtight inner container, and the discharge port of the residual material evaporated by the phosphorus mud is connected with the discharge port; and/or the discharge port of the residual material evaporated by the phosphorus mud is connected with the 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.

In order to solve the technical problem, according to a seventh aspect of the present application, a phosphorus mud evaporation device is provided. Comprising the following steps: the shell is respectively provided with a phosphorus mud input port, a phosphorus mud evaporation residual substance discharge port and a phosphorus steam output port; the material mechanical conveying device is arranged in the shell, the feeding part of the material mechanical conveying device is connected with the phosphorus mud input port, the discharging part of the material mechanical conveying device is connected with the phosphorus mud evaporation residual substance discharge port, and the 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, wherein the material conveyor is provided with a conveying part arranged on the surface of a material conveying base 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 enabling the materials to be dispersed on the material conveying base to realize material conveying when moving.

Optionally, the transmission part comprises a wrapping type transmission part, wherein the wrapping type transmission part is provided with a driving wheel, a driven wheel and a transmission chain or a transmission belt, wherein the driving wheel and the driven wheel are oppositely arranged in the conveying direction, and the transmission chain or the transmission belt is wrapped on the driving wheel and the driven wheel at the same time; the wrapping type transmission part is positioned above the side of the material conveying base; 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, and the outlet of the feeding part is positioned in the conveying member connecting ring.

Optionally, the material heating device is located below the material conveying base. Optionally, 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 evaporating section.

Optionally, the phosphorus steam outlet and the exhaust part below the phosphorus steam outlet are positioned at the top of the mechanical material conveying device and are arranged corresponding to the 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 is connected with the discharge port.

Optionally, the discharge port of the residual material evaporated by the phosphorus mud is connected with the 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.

In order to solve the technical problem, according to an eighth aspect of the present application, a phosphorus mud evaporation device is provided. Comprising the following steps: the shell is respectively provided with a phosphorus mud input port, a phosphorus mud evaporation residual substance discharge port and a phosphorus steam output port; the material mechanical conveying device is arranged in the shell, the feeding part of the material mechanical conveying device is connected with the phosphorus mud input port, the discharging part of the material mechanical conveying device is connected with the phosphorus mud evaporation residual substance discharge port, and the 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 middle storage device, a first discharge valve, a second discharge valve, a gas replacement device, a first discharge valve, a second discharge valve and a third discharge valve, wherein the discharge port of the residual material evaporated by the phosphorus mud is connected with the middle storage device through the first discharge valve, and the gas replacement device is used for injecting safe replacement gas into the middle storage device and the second discharge valve is used for discharging materials in the middle storage device.

Optionally, the mechanical conveyer of material contains the material conveyer, the material conveyer has the conveying part that sets up on the surface of material transport base and is used for driving conveying part's drive part, conveying part is in the drive of drive part can be followed mechanical conveyer of material's direction of delivery motion and through acting on the material when moving realize the material and carry, the material is carried the base and is located the discharge part is equipped with the discharge gate, the evaporation of mud phosphorus surplus material discharge opening is connected the discharge gate.

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 devices are distributed in sequence along the conveying direction of the material mechanical conveying device to form a heating section and an evaporating section.

Optionally, the middle accumulator adopts a conical pipe with a larger pipe diameter at the connecting side of the first discharge valve and a smaller pipe diameter at the connecting side of the second discharge valve; the first discharge valve adopts a discharge valve matched with a larger pipe diameter of the connecting side of the first discharge valve of the intermediate storage device, and the second discharge valve adopts a discharge valve matched with a smaller pipe diameter of the connecting side of the second discharge valve of the intermediate storage device.

To solve the above technical problem, according to a ninth aspect of the present application, there is provided a phosphorus mud evaporation device, including: the shell is respectively provided with a phosphorus mud input port, a phosphorus mud evaporation residual substance discharge port and a phosphorus steam output port; the material mechanical conveying device is arranged in the shell, the feeding part of the material mechanical conveying device is connected with the phosphorus mud input port, the discharging part of the material mechanical conveying device is connected with the phosphorus mud evaporation residual substance discharge port, and the 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 conveying device comprises a material conveyor, wherein 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, the transmission part is used for driving the conveying part, the conveying part can move along the conveying direction of the material conveying device under the driving of the transmission part, the material conveying is realized by acting on materials during movement, and the material conveying base is provided with a width extending transversely along the conveying direction of the material conveying device; and the feeding part is provided with a distributing structure for distributing the material in a direction transverse to the conveying direction of the material mechanical conveying device.

Optionally, the distributing structure comprises a distributing pipe which is located above the material conveying base, avoids the conveying component and transversely extends along the conveying direction of the material mechanical conveying device, and distributing openings transversely distributed along the conveying direction of the material mechanical conveying device are formed in the distributing pipe.

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 material distributing structure is positioned 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 material evaporated by the phosphorus mud is connected with the discharge port; and/or the discharge port of the residual material evaporated by the phosphorus mud 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 drive of the transmission component and act on the material in a manner of enabling the material to be dispersed on the material conveying base station 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 a part of the material conveyor.

The above-described sludge phosphorus recovery processing system, the sludge phosphorus evaporation system, the sludge phosphorus recovery processing method, and the sludge phosphorus evaporation apparatus in the first to ninth aspects may extract phosphorus vapor by evaporating the sludge phosphorus, the phosphorus vapor becomes yellow phosphorus after cooling, and the sludge phosphorus such as phosphorus pentoxide in the sludge phosphorus during the evaporation process of the sludge phosphorus evaporates the remaining substances to form dry slag or dry ash, which may be subsequently treated in clusters for reuse as phosphorus ore. The residual substances of the sludge phosphorus evaporation after the sludge phosphorus recovery treatment are dry slag or dry ash, and the subsequent treatment is more convenient.

The present application is further described below with reference to the drawings and detailed description. Additional aspects and advantages of 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 application.

Drawings

The accompanying drawings, which form a part hereof, are included to provide an understanding of the present application, and in which are shown by way of illustration, and not limitation, specific examples of which are given herein. In the drawings:

FIG. 1 is a schematic diagram of one embodiment of a sludge phosphorus recovery processing system of the present application.

FIG. 2 is a schematic diagram of an embodiment of a sludge phosphorus recovery processing system of the present application.

FIG. 3 is a schematic diagram of an embodiment of a sludge phosphorus recovery processing system of the present application.

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

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

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

Fig. 7 is a sectional view (schematic) taken along the direction 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 descriptions. Before describing the present application with reference to the accompanying drawings, it should be noted in particular that:

the technical solutions and technical features provided in the respective sections including the following description may be combined with each other without conflict. Furthermore, the described embodiments, features, and combinations of features can be combined as desired and claimed in any given application.

The embodiments of the present application referred to in the following description are typically only a few, but not all, embodiments, based on which all other embodiments, as would be apparent to one of ordinary skill in the art without undue burden, are within the scope of patent protection.

With respect to terms and units in this specification: the terms "comprising," "including," "having," and any variations thereof, in this specification and the corresponding claims and related parts, are intended to cover a non-exclusive inclusion. Furthermore, other related terms and units may be reasonably construed based on the description provided herein.

The method has the advantages that as the filtered sludge impurities still need to be treated by adopting the liquid membrane filtration technology, the whole sludge phosphorus treatment process flow is longer, so that phosphorus steam is extracted by evaporating the sludge phosphorus, the phosphorus steam becomes yellow phosphorus after being cooled, dry slag or dry ash is formed by evaporating residual substances of the sludge phosphorus such as phosphorus pentoxide and the like in the sludge phosphorus evaporation process, and the dry slag or the dry ash is used as a technical route for recycling phosphorite after being subjected to group treatment.

The inventor researches and researches on yellow phosphorus manufacturers in the field, and found that phosphorus steam is extracted by evaporating phosphorus from the sludge, the phosphorus steam is cooled to become yellow phosphorus, and the residual substances of phosphorus evaporation such as phosphorus pentoxide in the phosphorus evaporation process form dry slag or dry ash, wherein the dry slag or the dry ash is used as a technical route for recycling phosphorus ore after being subjected to group treatment, and a reasonable-design phosphorus recovery treatment system and related phosphorus evaporation equipment are the most critical. When some manufacturers try to recycle the phosphorus in this way, the evaporation production environment of the phosphorus is very bad, and the existing problems mainly include: 1. the phosphorus mud evaporator is unreasonable in design, has phosphorus steam leakage and larger potential safety hazards caused by the phosphorus steam leakage, has lower phosphorus mud evaporation efficiency, and can generate a large amount of greenhouse gas emission in a fuel combustion heating mode; 2. the content of solid impurities in the phosphorus steam is high, and the purity of the recovered yellow phosphorus is not ideal; 3. the mud phosphorus evaporator and related phosphorus steam pipeline facilities are easy to be blocked; 4. the sludge phosphorus recovery treatment system has poor equipment integrity and lacks an integrated sludge phosphorus recovery treatment system with high integrity and exquisite structure; 5. the tail gas after the phosphorus vapor recovery treatment contains acidic substances, which is easy to cause the damage and pollution emission of subsequent equipment.

Several sludge phosphorus recovery treatment systems and associated equipment will be provided below to better effect sludge phosphorus recovery treatment.

Sludge phosphorus recovery treatment System example 1

FIG. 1 is a schematic diagram of one embodiment of a sludge phosphorus recovery processing system of the present application. Fig. 4 is a cross-sectional view taken along A-A in fig. 1. Fig. 5 is a sectional view taken along the direction B-B in fig. 1. Fig. 6 is a cross-sectional view (schematic) taken along the direction C-C in fig. 1. As shown in fig. 1, 4-6, a sludge phosphorus recovery treatment system comprising: a sludge phosphorus evaporation section 11, a phosphorus vapor filtration dust removal section 13, a phosphorus vapor drainage section 12, a phosphorus vapor cooling phosphorus recovery section 14, and a phosphorus vapor drive section 15 (the phosphorus vapor drive section 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 shell of the sludge phosphorus evaporation part 11, and a sludge phosphorus input port 113 connected with a feeding part of the material mechanical conveying device 111, a sludge phosphorus evaporation residual material discharge port 114 connected with a discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with an exhaust part of the material mechanical conveying device 111 are respectively arranged on the shell of the sludge phosphorus evaporation part 11.

The phosphorus evaporation part 11 is used for receiving the phosphorus sludge conveyed from the outside, the phosphorus sludge enters the material mechanical conveying device 111 through the feeding part of the material mechanical conveying device 111 and is conveyed by the material mechanical conveying device 111 along the direction indicated by the arrow D1, the phosphorus sludge on the material mechanical conveying device 111 is heated by the material heating device 112 during the conveying process, and P in the phosphorus sludge ₄ The phosphorus vapor is evaporated to be discharged from the exhaust part of the material mechanical conveying device 111 and then from the phosphorus vapor outlet 115, and as the phosphorus sludge is evaporated, the phosphorus evaporation surplus substances (phosphorus pentoxide and the like) form dry slag and are discharged from the discharge part of the material mechanical conveying device 111 and the phosphorus sludge evaporation surplus substance discharge opening 114.

The shell of the phosphorus steam filtering and dedusting part 13 is internally provided with a filter element 131 capable of tolerating the temperature of phosphorus steam, the filter element 131 divides the interior of the phosphorus steam filtering and dedusting part 13 into an original air chamber 132 and a clean air chamber 133, and the shell of the phosphorus steam filtering and dedusting part 13 is respectively provided with a phosphorus steam input port 134 connected with the original air chamber 132 and a phosphorus steam output port connected with the clean air chamber 133.

The phosphorus vapor filtration dust removing part 13 serves to receive the phosphorus vapor from the sludge phosphorus evaporating part 11 and to filter and remove the phosphorus vapor at a high temperature above the dew point temperature of the phosphorus vapor, and thus the filter cartridge 131 needs to withstand the phosphorus vapor temperature. Currently, filter cartridges meeting such conditions of use are available on the market, such as ceramic filter cartridges, metal filter cartridges, and the like. The phosphorus vapor before filtration enters the original air chamber 132 through the phosphorus vapor inlet 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 clean phosphorus vapor after filtration is discharged from the phosphorus vapor outlet connected with the air purifying chamber 133.

The phosphorus vapor drainage portion 12 is disposed between the phosphorus vapor deposition portion 11 and the phosphorus vapor filtration dust removal portion 13, and connects a phosphorus vapor outlet 115 on the housing of the phosphorus vapor deposition portion 11 with a phosphorus vapor inlet 134 on the housing of the phosphorus vapor filtration dust removal portion 13 through a drainage channel 121 defined by the housing of the phosphorus vapor drainage portion 12. The phosphorus vapor drainage part 12 is used for guiding the phosphorus vapor generated by the phosphorus sludge evaporation part 11 into the phosphorus vapor filtration dust removal part 13.

The shell of the phosphorus vapor cooling and phosphorus collecting part 14 is internally provided with a phosphorus vapor and cooling liquid mixing device 141, the phosphorus vapor and cooling liquid mixing device 141 is provided with a first gas-liquid mixing cavity 1401 for mixing phosphorus vapor and cooling liquid, a phosphorus vapor input port 1402 and a tail 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 vapor and cooling liquid mixing device 141 is connected with a phosphorus vapor input port 1402 and a phosphorus vapor output port on the shell of the phosphorus vapor filtering and dust removing part 13.

The phosphorus vapor and cooling liquid mixing device 141 of the phosphorus vapor cooling and collecting part 14 is used for receiving the clean phosphorus vapor discharged from the phosphorus vapor filtering and dust removing part 13 after filtering and dust removing, and cooling the phosphorus vapor by the cooling liquid, so as to obtain high-purity yellow phosphorus in the yellow phosphorus collecting tank 1403, and discharging the tail gas through the tail gas outlet 1404. The first gas-liquid mixing chamber 1401 typically sprays a cooling liquid (typically water) to the phosphorus vapor in a spray manner to achieve gas-liquid mixing and cool the yellow phosphorus gas. Of course, the first gas-liquid mixing chamber 1401 may be configured to perform gas-liquid mixing in any other possible manner.

The phosphorus vapor driving part 15 includes an air flow driving device 151, and the air flow driving device 151 is disposed between a phosphorus vapor input 1402 of the phosphorus vapor and cooling liquid mixing device 141 and a phosphorus vapor output on the housing of the phosphorus vapor filtering dust removing part 13 or disposed behind an exhaust gas output 1404 of the phosphorus vapor and cooling liquid mixing device 141, for driving the flow of phosphorus vapor by mechanical suction. In general, the air flow driving device 151 may employ a blower or a pump.

According to the phosphorus recovery treatment system, phosphorus steam can be extracted by evaporating phosphorus, the phosphorus steam becomes yellow phosphorus after being cooled, phosphorus pentoxide and the like in the phosphorus evaporation process serve as phosphorus evaporation residual substances and form dry slag or dry ash, the phosphorus can be reused as phosphorus ore after subsequent group treatment, and the phosphorus evaporation residual substances after the phosphorus recovery treatment are dry slag or dry ash, so that the subsequent treatment is more convenient. In addition, because the phosphorus steam filtering and dedusting part 13 is adopted, the phosphorus steam is filtered by the filter element 131 before being cooled, and solid particles in the phosphorus steam can be effectively removed by the filtering mode, so that the purity of the recovered yellow phosphorus is greatly improved.

Modification of embodiment 1 of the sludge phosphorus recovery treatment System

The inventors have found that there are two key points in the design of the phosphorus vapor diversion section 12 of the above-described sludge phosphorus recovery processing system: firstly, the phosphorus vapor generated from the phosphorus mud evaporation part 11 contains a large amount of dust which is easy to cause the blockage of the drainage channel 121, so that special consideration is needed to avoid the blockage of the drainage channel 121 by dust; secondly, the phosphorus vapor is easy to be cooled to separate out liquid yellow phosphorus, which can cause further blockage of the drainage channel 121, and can greatly influence the normal operation of the phosphorus vapor filtering and dust removing part 13 (the liquid yellow phosphorus can adhere to the filter element 131 to reduce the filtering efficiency of the filter element 131), so that the heating or heat preservation measures of the phosphorus vapor drainage part 12 are also required to be considered.

For the above two key points, in order to avoid the blockage of the drainage channel 121 and prevent the phosphorus vapor from being cooled, according to the conventional thought, the drainage channel 121 may be designed into a shape that extends vertically upwards from the phosphorus mud evaporation portion 11 and then turns and then is connected with the phosphorus vapor filtration and dust removal portion 13 obliquely downwards, and a heater is installed between the two sections of pipes vertically upwards and obliquely downwards. However, the method is complex, has high construction and use costs, and is unfavorable for compact design of the sludge phosphorus recovery treatment system.

As shown in fig. 1, 4-5, in a preferred embodiment, the phosphorus vapor drainage portion 12 is designed in a manner that the phosphorus vapor outlet 115 on the shell of the phosphorus sludge evaporation portion 11 is integrally connected with the phosphorus vapor inlet 134 on the shell of the phosphorus vapor filtration dust removal portion 13 through a bottom-up and non-substantial turn section drainage channel 121 defined by the shell of the phosphorus vapor drainage portion 12. It is specifically noted herein that the meaning of "from bottom to top and without substantial turning" should be understood as: the drainage channel 121 is entirely vertical, inclined or curved upward, and the center line connecting the two ports of the drainage channel 121 (straight line is entirely located in the drainage channel 121).

Generally, the whole of the "bottom-up without substantial turning section" of the drainage channel 121 is vertically or obliquely upward, and at this time, the center of the phosphorus vapor outlet 115 on the housing of the phosphorus mud evaporation portion 11 and the center of the phosphorus vapor inlet 134 on the housing of the phosphorus vapor filtration dust removal portion 13 are connected to form a straight line vertically upward or obliquely upward, which is located entirely within the drainage channel 121.

The above-described preferred embodiment of the phosphorus vapor conduction portion 12 can effectively avoid the problem of dust accumulation and clogging in the conduction channel 121, and at the same time, the phosphorus vapor can rapidly pass through the conduction channel 121 in a very short path to prevent the phosphorus vapor from cooling and precipitating liquid yellow phosphorus in the phosphorus vapor conduction portion 12, so that the installation of a heater in the conduction channel 121 can be avoided to reduce the cost and energy consumption. In addition, the phosphorus steam drainage part 12 is suitable for the compact design between the phosphorus mud evaporation part 11 and the phosphorus steam filtering and dust removing part 13, and can tightly connect the shell of the phosphorus mud evaporation part 11, the shell of the phosphorus steam drainage part 12 and the shell of the phosphorus steam filtering and dust removing part 13 together.

In a specific implementation, the casing of the phosphorus vapor drainage portion 12 may form a gas collecting hood 122, the gas collecting hood 122 may be formed by a hood body surrounded by a first side wall 1201 and a second side wall 1202 or by a hood body surrounded by the first side wall 1201 and the second side wall 1202 and a top wall 1203 disposed at the top of the hood body, the first side wall 1201 is vertically disposed, and the second side wall 1202 is obliquely disposed and is inclined to ensure that the drainage channel 121 gradually converges from the phosphorus vapor outlet 115 on the casing of the phosphorus vapor evaporation portion 11 to the phosphorus vapor inlet direction 134 on the casing of the phosphorus vapor filtration dust removal portion 13. When the gas-collecting hood 122 is formed by a hood body surrounded by the first side wall 1201 and the second side wall 1202, the gas-collecting hood 122 has no top wall, and the upper and lower ends of the gas-collecting hood 122 are directly connected with the phosphorus mud evaporation portion 11 and the phosphorus vapor filtration dust removal portion 13, respectively. When the gas collecting hood 122 is formed by a hood body surrounded by the first side wall 1201 and the second side wall 1202 and the top wall 1203 arranged on top of the hood body, it appears that there is a turn at the junction of the second side wall 1202 and the top wall 1203, but this does not substantially lead to turning of the drainage channel 121 and thus to dust collection.

More specifically, the second side wall 1202 may be formed of a first second side wall 1202a, a second side wall 1202b, and a third second side wall 1202c, where 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 pyramid 123. As shown in fig. 1, 4-5, when the phosphorus vapor drain portion 12 is the quadrangular pyramid 123, a material (such as a steel plate) from which the quadrangular pyramid 123 is made does not need to be bent, thereby saving manufacturing costs and difficulty of the phosphorus vapor drain portion 12. Meanwhile, the quadrangular frustum pyramid 123 structure has higher deformation resistance and structural strength, so that the integrity of the sludge phosphorus recovery treatment system is better.

Modification II of embodiment 1 of sludge phosphorus recovery treatment System

In the above-mentioned sludge phosphorus recovery treatment system, the tail gas generated by the phosphorus vapor and cooling liquid mixing device 141 of the phosphorus vapor cooling and phosphorus receiving portion 14 may further contain acid gas, which is easy to cause damage and pollution discharge of subsequent equipment. In view of this problem, as shown in fig. 6, in a preferred embodiment, the phosphorus vapor cooling phosphorus recovery section 14 further includes a tail gas and lye mixing device 142, where the tail gas and lye mixing device 142 has a second gas-liquid mixing chamber 1405 for mixing the tail gas and lye, and a tail gas input port and a tail gas output port respectively connected to the second gas-liquid mixing chamber 1405, and the tail gas input port is connected to the tail gas output port 1404 of the phosphorus vapor and cooling liquid mixing device 141.

The tail gas and alkali liquor mixing device 142 of the phosphorus vapor cooling phosphorus receiving part 14 is used for receiving the tail gas discharged from the phosphorus vapor and cooling liquid mixing device 141, absorbing acid gas in the tail gas by alkali liquor, and discharging the tail gas through a tail gas outlet of the tail gas and alkali liquor mixing device 142. The second gas-liquid mixing chamber 1405 typically sprays alkaline solution to the exhaust gas in a spray manner to achieve gas-liquid mixing. Of course, the second gas-liquid mixing chamber 1405 may also use any other possible means to achieve gas-liquid mixing.

In order to make the structure of the phosphorus vapor cooling and phosphorus receiving part 14 more compact, the shell of the phosphorus vapor and cooling liquid mixing device 141 and the shell of the tail gas and alkali liquid mixing device 142 can be connected into a whole. 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 exhaust gas and lye mixing device 142 share the same side wall, so that the exhaust gas outlet 1404 of the phosphorus vapor and cooling liquid mixing device 141 effectively doubles as the exhaust gas inlet of the exhaust gas and lye mixing device 142.

Sludge phosphorus evaporation part (device) of sludge phosphorus recovery treatment 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 sludge phosphorus evaporation part 11, and a sludge phosphorus input port 113 connected with a feeding part of the material mechanical conveying device 111, a sludge phosphorus evaporation residual material discharge port 114 connected with a discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with an exhaust part of the material mechanical conveying device 111 are respectively arranged on the shell of the sludge phosphorus evaporation part 11. The phosphorus mud evaporation part 11 is used for receiving the phosphorus mud conveyed from the outside, and the phosphorus mud enters the material mechanical conveying device 111 through the feeding part of the material mechanical conveying device 111 and is conveyed through the material mechanical conveying device 111 The conveying device 111 conveys along the direction indicated by the arrow D1, and the phosphorus in the phosphorus is heated by the material heating device 112 in the conveying process by the phosphorus in the material mechanical conveying device 111 ₄ The phosphorus vapor is evaporated to be discharged from the exhaust part of the material mechanical conveying device 111 and then from the phosphorus vapor outlet 115, and as the phosphorus sludge is evaporated, the phosphorus evaporation surplus substances (phosphorus pentoxide and the like) form dry slag and are discharged from the discharge part of the material mechanical conveying device 111 and the phosphorus sludge evaporation surplus substance discharge opening 114.

In designing the internal structure of the specific phosphorus mud evaporation section 11, the inventors consider that: firstly, the inside of the phosphorus mud evaporation part 11 is in a high-temperature and high-pressure environment, so that phosphorus steam is easy to leak and a great potential safety hazard is generated due to the phosphorus steam leakage; secondly, the conventional mechanical material conveying device (such as a screw conveyor and the like) has poor material dispersing effect, so that the evaporation efficiency of the phosphorus mud is low; third, during the operation of the phosphorus mud evaporation section 11, as phosphorus mud evaporates, phosphorus evaporation residual substances (phosphorus pentoxide, etc.) form dry slag and are discharged from the discharge portion of the material mechanical conveying device 111 and the phosphorus mud evaporation residual substance discharge port 114, and during the discharge of the phosphorus evaporation residual substances, there is a safety risk caused by gas leakage. Then, the inventors have studied to propose the following improvements to the phosphorus mud evaporation section 11, which can be applied to the phosphorus mud evaporation section 11 in whole or in part.

Improved first

As shown in fig. 4 to 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 a shell 116 of the material mechanical conveying device 11, a material phosphorus input port 113 connected with a feeding part of the material mechanical conveying device 111, a material phosphorus evaporation residual material discharge port 114 connected with a discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with an exhaust part of the material mechanical conveying device 111 are respectively arranged on the shell 116 of the material mechanical conveying device 11, and in addition, the material mechanical conveying device 111 comprises a hermetic seal liner 1111 and a material conveyor arranged in the hermetic seal liner 1111, and the feeding part, the discharging part and the exhaust part are respectively arranged on the hermetic seal liner 1111.

The material conveyor 1112 essentially functions to transfer material (phosphorus sludge), and because the material conveyor 1112 is located within the hermetically sealed container 1111, the transfer, heating, and evaporation of phosphorus sludge on the material conveyor 1112 is all performed within the hermetically sealed container 1111. The airtight inner container 1111 can adopt a high temperature and high pressure resistant steel pressure container and other containers capable of realizing airtight sealing, thus, phosphorus steam leakage can be basically stopped and potential safety hazards caused by phosphorus steam leakage can be eliminated.

Specifically, the airtight container 1111 may be integrally connected to the bottom of the gas collecting chamber 122, for example, the vent opening of the airtight container 1111 may be welded to the first and second side walls 1202a, 1202b, 1202c and 1201 of the gas collecting chamber 122. At this time, the casing 116 of the phosphorus mud evaporation section 11 may be made of a heat-resistant insulating material such as insulating bricks or the like. When the airtight container 1111 is a steel pressure container, its shape can be designed and manufactured to be highly adapted to the shape of the material conveyor 1112, so that the entire structure of the phosphorus-mud evaporation portion 11 can be more compact.

Improved second point

As shown in fig. 4 to 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 shell 116 of the phosphorus evaporation part 11, a phosphorus input port 113 connected with the feeding part of the material mechanical conveying device 111, a phosphorus 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 116 of the phosphorus evaporation part 11, in addition, the material mechanical conveying device 111 comprises a material conveyor 1112, the material conveyor 1112 is provided with a conveying part b arranged on the surface of a 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 so as to enable the material to act on the material in a dispersing manner on the material conveying base 1112a during the movement.

The material delivery base 1112a is configured to provide a table (preferably a planar surface) so that the delivery member 1112b can dispense material (phosphorus sludge) on the material delivery base 1112 a. That is, the material transporting base 1112a and the transporting member 1112b are relatively moved, and when the transporting member 1112b moves on the material transporting base 1112a, the material (phosphorus mud) on the material transporting base 1112a can be dispersed. Typically, the conveying members 1112b are distributed in a manner that conforms to the table top of the material conveying base 1112a, such that the material (phosphorus sludge) is more fully and uniformly distributed over the entire table top of the material conveying base 1112a by the conveying members 1112 b. In addition, material heating device 112 may be positioned below material delivery base 1112a, and material heating device 112 may also be shaped or arranged to conform to the surface of material delivery base 1112 a.

In particular, 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 the driving wheel 1112c and the driven wheel 1112d at the same time; the wrap around transmission member is located laterally above the material delivery base 1112 a; the conveying members 1112b are spaced apart on the drive chain 1112e or belt and are positioned above the material conveying base 1112 a. In a preferred embodiment, the conveying member 1112b employs a scraper disposed transversely to the conveying direction; at this time, the driving chain 1112e or the driving belt is provided with the scrapers at intervals along the conveying direction to form a grating-like scraping structure, which can make the material better dispersed and conveyed on the surface of the material conveying base 1112 a. As shown in fig. 5, in general, the transmission member includes the wrap-around transmission members disposed opposite to both sides of the conveying direction, and in this case, both ends of the scraper may be connected to the wrap-around transmission members disposed opposite to both sides of the conveying direction, respectively. The driving wheels 1112c and the driven wheels 1112d corresponding to the wrapping type transmission members disposed opposite to each other in the conveying direction may be mounted on corresponding rotating shafts 1112f, respectively, and the rotating shafts 1112f may be mounted in the casing 116 of the phosphorus mud evaporation section 11 through bearings.

Furthermore, the conveying elements 1112b may be distributed along the entire circumference of the drive chain 1112e or belt such that a conveying element connecting ring is formed on the material conveying base 1112b, within which the outlet of the feed section is located. When the conveying members 1112b are distributed along the entire circumference of the drive chain 1112e or belt such that a conveying member coupling ring is formed on the material conveying base 1112b, the conveying members 1112b can continuously act on the material, since the outlet of the feeding portion is located in the conveying member coupling ring, so that the feeding portion does not affect the rotation of the conveying member coupling ring.

Improved three-point

As shown in fig. 4 to 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 a shell 116 of the sludge phosphorus evaporation part 11, a sludge phosphorus input port 113 connected with a feeding part of the material mechanical conveying device 111, a sludge phosphorus evaporation residual material discharge port 114 connected with a discharging part of the material mechanical conveying device 111 and a phosphorus steam output port 115 connected with an exhaust part of the material mechanical conveying device 111 are respectively arranged on the shell 116 of the sludge phosphorus evaporation part 11, in addition, the material mechanical conveying device 111 comprises a material conveyor 1112, the material conveyor 1112 is provided with a conveying part b arranged on the surface of a material conveying base 1112a and a transmission part for driving the conveying part 1112b, the conveying part 1112b can move along the conveying direction of the material mechanical conveying device 111 and acts on a material when moving to realize material conveying, and the material conveying base 1112a is provided with a width extending transversely along the conveying direction of the material mechanical conveying device 1112; and the feeding part is provided with a distributing structure for distributing materials transversely to the conveying direction of the material mechanical conveying device. The material (phosphorus mud) can be distributed on the width direction of the material conveying base 1112a through the material distribution structure, so that the material 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 material distributing structure includes a material distributing pipe 1112g located above the material conveying base 1112a, avoiding the conveying member 1112b, and extending transversely to the conveying direction of the material mechanical conveying device 111, and material distributing openings 1112h distributed transversely to the conveying direction of the material mechanical conveying device 111 are formed in the material distributing pipe 1112 g.

Improvement four

As shown in fig. 4 to 5, a material mechanical conveyer 111 and a material heating device 112 arranged along the conveying direction of the material mechanical conveyer 111 are arranged in a shell 116 of the material mechanical conveyer 11, a material phosphorus input port 113 connected with a feeding part of the material mechanical conveyer 111, a material phosphorus evaporation surplus substance discharge port 114 connected with a discharging part of the material mechanical conveyer 111 and a phosphorus steam output port 115 connected with an exhausting part of the material mechanical conveyer 111 are respectively arranged on the shell 116 of the material phosphorus evaporator 11, wherein the material phosphorus evaporation surplus substance discharge port 114 is connected with an intermediate container 1172 through a first discharge valve 1171, and a gas replacement device 1174 for injecting a safety replacement gas into the intermediate container 1172 and a second discharge valve 1173 for discharging materials in the intermediate container 1172 are arranged on the intermediate container 1172.

Since the discharge port 114 for evaporating residual materials from the phosphorus mud is connected to the intermediate container 1172 through the first discharge valve 1171, the intermediate container 1172 is provided with a gas replacement device 1174 for injecting a safe replacement gas into the intermediate container 1172 and a second discharge valve 1173 for discharging materials in the intermediate container 1172, after the residual materials from the phosphorus mud enter the intermediate container 1172 through the first discharge valve 1171, the gas replacement device 1174 can be opened to introduce inert gas into the intermediate container 1172, and after the replacement of the volatile gas is completed, the second discharge valve 1173 is opened to discharge the materials on the basis of closing the first discharge valve 1171, thereby avoiding air from entering the phosphorus mud evaporation part 11.

Specifically, the middle hopper 1172 may be a conical pipe with a larger pipe diameter at the connection side of the first discharge valve and a smaller pipe diameter at the connection side of the second discharge valve; and, the first discharge valve 1171 may be a discharge valve matched with a larger pipe diameter of the first discharge valve connection side of the intermediate stocker, and the second discharge valve 1173 may be a discharge valve matched with a smaller pipe diameter of the second discharge valve connection side of the intermediate stocker. The design of the intermediate hopper 1172 as a conical tube as described above may provide for a smoother discharge of the intermediate hopper 1172.

Sludge phosphorus recovery treatment System example 2

FIG. 2 is a schematic diagram of an embodiment of a sludge phosphorus recovery processing system of the present application. Fig. 7 is a sectional view (schematic) taken along the direction D-D in fig. 2. As shown in fig. 2 and 7, a sludge phosphorus recovery processing system includes: a sludge phosphorus evaporation section 11, a phosphorus vapor filtration dust removal section 13, a phosphorus vapor drainage section 12, a phosphorus vapor cooling phosphorus recovery section 14, and a phosphorus vapor drive section 15 (the phosphorus vapor drive section 15 is not shown in fig. 2).

Wherein, 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 material mechanical conveying device 11, and a material phosphorus input port 113 connected with the feeding part of the material mechanical conveying device 111, a material phosphorus 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 material mechanical conveying device 11.

The phosphorus vapor drainage portion 12 is disposed between the phosphorus vapor deposition portion 11 and the phosphorus vapor filtration dust removal portion 13, and connects a phosphorus vapor outlet 115 on the housing of the phosphorus vapor deposition portion 11 with a phosphorus vapor inlet 134 on the housing of the phosphorus vapor filtration dust removal portion 13 through a drainage channel 121 defined by the housing of the phosphorus vapor drainage portion 12.

The phosphorus vapor cooling and phosphorus receiving section 14 further includes a tail gas and alkali liquor mixing device 142, and the tail gas and alkali liquor mixing device 142 includes a second gas-liquid mixing chamber 1405 for mixing the tail gas and alkali liquor, and a tail gas input port and a tail gas output port connected to the second gas-liquid mixing chamber 1405, respectively, and the tail gas input port is connected to the tail gas output port 1404 of the phosphorus vapor and cooling liquid mixing device 141.

The phosphorus vapor driving part 15 includes an air flow driving device 151, and the air flow driving device 151 is disposed between a phosphorus vapor input 1402 of the phosphorus vapor and cooling liquid mixing device 141 and a phosphorus vapor output on the housing of the phosphorus vapor filtering dust removing part 13 or disposed behind an exhaust gas output 1404 of the phosphorus vapor and cooling liquid mixing device 141, for driving the flow of phosphorus vapor by mechanical suction. In general, the air flow driving device 151 may employ a blower.

The sludge phosphorus evaporation portion 11, the phosphorus vapor filtration dust removal portion 13, and the phosphorus vapor drainage portion 12 of the sludge phosphorus recovery processing system of this embodiment may adopt the same or similar scheme as the corresponding portions in the sludge phosphorus recovery processing system of embodiment 1, but the phosphorus vapor cooling phosphorus recovery portion 14 and the phosphorus vapor driving portion 15 of the sludge phosphorus recovery processing system of this embodiment are modified.

As shown in fig. 7, in the phosphorus vapor cooling and phosphorus collecting section 14 and the phosphorus vapor driving section 15, the phosphorus vapor between the phosphorus vapor inlet and the exhaust gas outlet of the phosphorus vapor and cooling liquid mixing device 141 must pass under the liquid level of the cooling liquid maintained in the first gas-liquid mixing chamber 1401, and the exhaust gas between the exhaust gas inlet of the exhaust gas and alkali liquid mixing device 142 and the exhaust gas outlet of the exhaust gas and alkali liquid mixing device 1401 must pass under 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 liquid mixing device; the air flow driving device 151 adopts a vacuum pump or a water ring vacuum pump, which is arranged behind the tail gas output port of the phosphorus steam and cooling liquid mixing device 142.

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

The above-mentioned phosphorus steam cooling receives phosphorus part 14 adopts the mode of similar "water bath" to realize phosphorus steam and coolant liquid and tail gas and alkali lye mixing, can make gas and liquid more abundant contact. Since the air flow driving device 151 adopts a vacuum pump or a water ring vacuum pump (preferably a water ring vacuum pump), the suction force is large, and the gas can be ensured to pass through the first gas-liquid mixing chamber 1401 and the second gas-liquid mixing chamber 1405.

Sludge phosphorus recovery treatment System example 3

FIG. 3 is a schematic diagram of an embodiment of a sludge phosphorus recovery processing system of the present application. As shown in fig. 3, a sludge phosphorus recovery processing system includes: a sludge phosphorus evaporation section 11, a phosphorus vapor filtration dust removal section 13, a phosphorus vapor drainage section 12, a phosphorus vapor cooling phosphorus recovery section 14, and a phosphorus vapor drive section 15 (the phosphorus vapor drive section 15 is not shown in fig. 3).

The same or similar scheme can be adopted for the corresponding parts in the sludge phosphorus recovery processing system of embodiment 1 or 2, but the phosphorus steam drainage part 12 of the sludge phosphorus recovery processing system of this embodiment is modified.

As shown in fig. 3, the phosphorus vapor drainage portion 12 actually directly utilizes the housing of the phosphorus vapor filter dust removal portion 13, and the phosphorus vapor outlet 115 of the phosphorus vapor drainage portion 12 is located directly below the cylinder of the phosphorus vapor filter dust removal portion 13. Thus, the dust filtered by the phosphorus vapor filtration dust removing portion 13 can be discharged together through the phosphorus mud evaporating portion 11.

The content of the present application is described above. Those of ordinary skill in the art will be able to implement the present application based on these descriptions. Based on the foregoing specification, all other embodiments that may be obtained by one of ordinary skill in the art without making any inventive effort are intended to be within the scope of this application.

Claims

1. A phosphorus mud evaporation device, characterized by comprising:

the shell is respectively provided with a phosphorus mud input port, a phosphorus mud evaporation residual substance discharge port and a phosphorus steam output port;

the material mechanical conveying device is arranged in the shell, the feeding part of the material mechanical conveying device is connected with the phosphorus mud input port, the discharging part of the material mechanical conveying device is connected with the phosphorus mud evaporation residual substance discharge port, and the 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;

The material conveyor is provided with a conveying part arranged on the surface of a 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 drive of the transmission part and acts on the material in a manner of dispersing the material on the material conveying base to realize material conveying when moving;

the material conveying base has a width extending transversely to the conveying direction of the material mechanical conveying device; the feeding part is provided with a distributing structure for distributing materials transversely to the conveying direction of the material mechanical conveying device; the material distribution structure comprises a material distribution pipe which is arranged above the material conveying base, avoids the conveying component and transversely extends along the conveying direction of the material mechanical conveying device, and material distribution openings which are transversely distributed along the conveying direction of the material mechanical conveying device are formed in the material distribution pipe.

2. The phosphorus mud evaporation apparatus as defined in claim 1, wherein: the material conveying base is provided by the inner bottom wall of the airtight inner container or is a part of the material conveyor.

3. A phosphorus mud evaporation apparatus as claimed in any one of claims 1 to 2, wherein: the material conveyor is provided with a conveying part arranged on the surface of the material conveying base 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 drive of the transmission part and acts on the material to realize material conveying when in movement; the transmission part comprises a wrapping type transmission part, wherein the wrapping type transmission part is provided with a driving wheel, a driven wheel and a transmission chain or a transmission belt, wherein the driving wheel and the driven wheel are oppositely arranged in the transmission direction of the material mechanical transmission device, and the transmission chain or the transmission belt is wrapped on the driving wheel and the driven wheel at the same time; the wrapping type transmission part is positioned above the side of the material conveying base; the conveying components are arranged on the transmission chain or the transmission belt at intervals and are positioned above the material conveying base station.

4. A phosphorus mud evaporation apparatus as claimed in claim 3, wherein: the conveying component adopts a scraper plate transversely arranged along the conveying direction; the scraping plates are arranged on the transmission chain or the transmission belt at intervals along the transmission direction to form a grid-shaped scraping structure.

5. The phosphorus mud evaporation apparatus as defined in claim 4, wherein: the transmission part comprises wrapping transmission parts which are oppositely arranged at two sides of the conveying direction; the two ends of the scraping plate are respectively connected with the wrapping type transmission parts which are oppositely arranged at the two sides of the conveying direction.

6. A phosphorus mud evaporation apparatus as claimed in claim 3, wherein: the conveying parts are distributed along the whole circumference of the transmission chain or the transmission belt so as to form a conveying part connecting ring on the material conveying base, and the outlet of the feeding part is positioned in the conveying part connecting ring; and/or the shape of the airtight inner container is matched with the shape of the wrapping type transmission part to form an oblong structure with the length in the conveying direction and the thickness in the up-down direction.

7. The phosphorus mud evaporation apparatus as defined in claim 1, wherein: the material heating device is positioned 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 evaporating section.

8. The phosphorus mud evaporation apparatus as defined in claim 7, wherein: the exhaust part below the phosphorus steam outlet is positioned at the top of the mechanical material conveying device and is arranged corresponding to the evaporation section.

9. The phosphorus mud evaporation apparatus as defined in claim 1, wherein: the exhaust part is provided with a gas collecting cover with an upward gradually converging opening, and the bottom of the gas collecting cover is connected with the airtight inner container gas into a whole in a sealing way; and/or a feed inlet is arranged on the side wall of the feeding part on the airtight inner container, and the phosphorus mud input port is connected with the feed inlet; and/or a discharge port is arranged on the bottom wall of the discharging part on the airtight inner container, and the discharge port of the residual material evaporated by the phosphorus mud is connected with the discharge port; and/or the discharge port of the residual material evaporated by the phosphorus mud is connected with the 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.