A device for recovering yellow phosphorus from yellow phosphorus furnace gas

Abstract

The utility model discloses a device for recovering yellow phosphorus from yellow phosphorus furnace gas belongs to phosphorus chemical tail gas treatment and resource recovery technical field, aims at solving the technical problem of low recovery efficiency of yellow phosphorus furnace gas under prior art. The device for recovering yellow phosphorus from yellow phosphorus furnace gas includes: tower body, the tail gas conveying pipe is provided on the tower body bottom end lateral wall, the tower body top is provided with the tail gas discharge pipe orifice, and yellow phosphorus furnace gas is inputted into the tower body from the tail gas conveying pipe and is discharged from the tail gas discharge pipe orifice, inner tube, the inner tube is arranged in the tower body, and a plurality of recovery channels are formed in the inner tube, and the recovery channel is vertically distributed, and the refrigerant conveying pipe is arranged in each recovery channel. The device for recovering yellow phosphorus from yellow phosphorus furnace gas increases the contact area of refrigerant and furnace gas, improves the heat exchange efficiency, can more effectively reduce the temperature in the tower, makes the yellow phosphorus in yellow phosphorus furnace gas fully condense, thereby improves the recovery efficiency of yellow phosphorus.

Description

Technical Field

[0001] This utility model belongs to the field of phosphorus chemical tail gas treatment and resource recovery technology, specifically relating to a device for recovering yellow phosphorus from yellow phosphorus furnace gas. Background Technology

[0002] Yellow phosphorus production mainly employs the electric furnace method, which involves reacting molten phosphate rock with coke at high temperatures to generate elemental phosphorus vapor. This vapor is then cooled and separated to obtain the finished yellow phosphorus product. However, the exhaust gas generated during the production process still contains uncondensed yellow phosphorus particles and combustible gases (such as carbon monoxide). Direct emission or combustion of these gases not only wastes resources and increases production costs but also causes serious environmental pollution.

[0003] Currently, there are some shortcomings in the devices for recovering yellow phosphorus from yellow phosphorus furnace gas. For example, the recovery efficiency is not high, the heat exchange efficiency between the furnace gas and the refrigerant is low, and it is difficult to fully condense and recover the yellow phosphorus in the furnace gas. Therefore, this application proposes a device for recovering yellow phosphorus from yellow phosphorus furnace gas. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a device for recovering yellow phosphorus from yellow phosphorus furnace gas, aiming to solve the technical problem of low recovery efficiency of yellow phosphorus furnace gas under the existing technology.

[0005] Technical solution

[0006] To solve the above-mentioned technical problems, this utility model provides a device for recovering yellow phosphorus from yellow phosphorus furnace gas, comprising: a tower body, wherein a tail gas conveying pipe is provided on the bottom side wall of the tower body and a tail gas discharge port is provided at the top of the tower body, the yellow phosphorus furnace gas is input into the tower body from the tail gas conveying pipe and discharged from the tail gas discharge port; an inner cylinder, wherein the inner cylinder is disposed in the tower body and multiple recovery channels are opened on the inner cylinder, the recovery channels being vertically distributed; and a refrigerant conveying pipe, wherein the refrigerant conveying pipe is disposed in each recovery channel.

[0007] Preferably, a refrigerant input pipe is provided at the top of the side wall of the tower body, and a refrigerant output pipe is provided at the bottom of the side wall of the tower body. The top of the refrigerant delivery pipe is connected to the refrigerant input pipe, and the bottom of the refrigerant delivery pipe is connected to the refrigerant output pipe. The refrigerant is input through the refrigerant input pipe, passes through the refrigerant delivery pipe, and is discharged through the refrigerant output pipe.

[0008] Preferably, the refrigerant delivery pipe is arranged in a spiral shape within the recovery channel.

[0009] Preferably, a recycling pool is provided at the bottom of the tower body, the recycling pool is connected to the tower body, a cleaning port is provided on the side wall of the recycling pool, and a door panel is provided on the cleaning port.

[0010] Preferably, a gas supply branch pipe is vertically installed in the recovery channel, and the top ends of multiple gas supply branch pipes are connected to a diversion pipe. The diversion pipe is fixed at the top of the tower body, and an air inlet pipe is connected to the diversion pipe, which extends out of the tower body.

[0011] Preferably, the top and bottom ends of the gas supply branch pipe extend outside the inner cylinder, and the gas supply branch pipe is inserted into a spiral refrigerant delivery pipe, with several gas nozzles provided on the side wall of the gas supply branch pipe.

[0012] Preferably, the air nozzle is arranged at a downward angle. Beneficial effects

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This invention increases the contact area between the refrigerant and the furnace gas by using a spirally arranged refrigerant delivery pipe, thereby improving the heat exchange efficiency and more effectively reducing the temperature inside the tower. This allows the yellow phosphorus in the yellow phosphorus furnace gas to condense fully, thus improving the recovery efficiency of yellow phosphorus.

[0014] This utility model device has a compact structure and a reasonable layout of its components, facilitating installation and maintenance. The multiple recovery channels on the inner cylinder, along with the internal gas supply branches and nozzles, enable better agitation of the furnace gas and recovery of yellow phosphorus. By recovering yellow phosphorus, resource waste is reduced, and environmental pollution is minimized. The use of inert gas for agitation prevents the introduction of new impurities, ensuring the quality of the recovered yellow phosphorus. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the tower body in this utility model; Figure 3 This utility model Figure 2 Enlarged view of point A in the image; Figure 4 This is a schematic diagram of the gas transmission branch pipe in this utility model.

[0017] The markings in the attached diagram are as follows: 1. Tower body; 2. Exhaust gas delivery pipe; 3. Recovery tank; 4. Cleaning port; 5. Exhaust gas discharge port; 6. Refrigerant input pipe; 7. Refrigerant output pipe; 8. Air inlet pipe; 9. Inner cylinder; 10. Recovery channel; 11. Refrigerant delivery pipe; 12. Diversion pipe; 13. Gas delivery branch pipe; 14. Gas nozzle. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] This embodiment provides a device for recovering yellow phosphorus from yellow phosphorus furnace gas, the schematic diagram of which is shown below. Figures 1-4 As shown, it includes a tower body 1, an inner cylinder 9, and a refrigerant delivery pipe 11.

[0020] In this embodiment, the tower body 1 is the main structure of the entire device. A tail gas conveying pipe 2 is provided on the bottom side wall of the tower body 1 for inputting yellow phosphorus furnace gas into the tower body 1. A tail gas discharge port 5 is provided at the top of the tower body 1, through which the treated tail gas is discharged.

[0021] Furthermore, the inner cylinder 9 is installed inside the tower body 1, and multiple vertically distributed recovery channels 10 are opened on the inner cylinder 9. Each recovery channel 10 is equipped with a refrigerant delivery pipe 11 arranged in a spiral shape. A refrigerant input pipe 6 passes through the top of the side wall of the tower body 1, and a refrigerant output pipe 7 passes through the bottom of the side wall. The top of the refrigerant delivery pipe 11 is connected to the refrigerant input pipe 6, and the bottom is connected to the refrigerant output pipe 7. The refrigerant is input through the refrigerant input pipe 6, passes through the refrigerant delivery pipe 11, and is discharged through the refrigerant output pipe 7, thereby realizing the control of the temperature inside the tower.

[0022] Furthermore, a gas supply branch pipe 13 is vertically installed inside the recovery channel 10. The top and bottom ends of the gas supply branch pipe 13 extend outside the inner cylinder 9, and the gas supply branch pipe 13 is installed inside a spiral refrigerant delivery pipe 11. The top ends of multiple gas supply branch pipes 13 are connected to a distribution pipe 12, which is fixed to the top of the tower body 1. An air inlet pipe 8 is connected to the distribution pipe 12, extending outside the tower body 1, and is used to supply gas into the gas supply branch pipes 13. Several downwardly inclined air nozzles 14 are provided on the side wall of the gas supply branch pipes 13, through which gas is ejected.

[0023] In a further embodiment, a recovery tank 3 is provided at the bottom of the tower body 1. The recovery tank 3 is connected to the tower body 1 and is used to collect the condensed yellow phosphorus. A cleaning port 4 is provided on the side wall of the recovery tank 3, and a door plate is provided on the cleaning port 4 to facilitate the cleaning of the yellow phosphorus in the recovery tank 3.

[0024] In practical applications, the yellow phosphorus furnace gas enters the tower body 1 through the tail gas delivery pipe 2, and the refrigerant enters the refrigerant delivery pipe 11 through the refrigerant input pipe 6 to cool the furnace gas and condense the yellow phosphorus. Simultaneously, inert gas enters the distribution pipe 12 through the inlet pipe 8, and is then distributed to each gas delivery branch pipe 13, exiting from the gas nozzle 14. This serves to stir and assist in recovery. Furthermore, the inert gas provides protection, preventing the yellow phosphorus particles from burning and exploding at high temperatures. The condensed yellow phosphorus falls into the recovery tank 3, and the treated furnace gas is discharged from the tail gas discharge pipe 5.

[0025] Working principle: The yellow phosphorus furnace gas enters the tower body 1 through the tail gas conveying pipe 2, flows upward within the tower body 1, and is dispersed upward through multiple recovery channels 10. Simultaneously, refrigerant enters the refrigerant conveying pipe 11 through the refrigerant input pipe 6. Because the refrigerant conveying pipe 11 is spirally arranged within the recovery channels 10, it increases the contact area with the furnace gas, enabling more effective cooling. The yellow phosphorus in the furnace gas condenses into a liquid state at low temperature and falls along the inner wall of the recovery channels 10 or into the recovery pool 3 at the bottom of the tower body 1 by gravity.

[0026] Meanwhile, inert gas enters the distributor pipe 12 through the inlet pipe 8, and is then distributed to each gas delivery branch pipe 13, and is ejected from the nozzle 14. The nozzle 14 is arranged at a downward angle, and the ejected inert gas can agitate the furnace gas, so that the furnace gas can fully contact the refrigerant delivery pipe 11, improve the cooling effect, and at the same time help to blow the condensed yellow phosphorus into the recovery tank 3.

[0027] After cooling and yellow phosphorus recovery, the furnace gas is discharged from the tail gas discharge port 5 at the top of tower 1, completing the yellow phosphorus recovery process.

[0028] All technical features in this embodiment can be freely combined according to actual needs.

[0029] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An apparatus for recovering yellow phosphorus from yellow phosphorus furnace gas, characterized in that, include: The tower body (1) is provided with a tail gas conveying pipe (2) on the bottom side wall of the tower body (1) and a tail gas discharge port (5) is provided at the top of the tower body (1). Yellow phosphorus furnace gas is input into the tower body (1) from the tail gas conveying pipe (2) and discharged from the tail gas discharge port (5). The inner cylinder (9) is set inside the tower body (1), and multiple recycling channels (10) are opened on the inner cylinder (9), which are vertically distributed; A refrigerant delivery pipe (11) is provided in each recycling channel (10).

2. The apparatus for recovering yellow phosphorus from yellow phosphorus furnace gas according to claim 1, characterized in that, A refrigerant input pipe (6) is installed at the top of the side wall of the tower body (1), and a refrigerant output pipe (7) is installed at the bottom of the side wall of the tower body (1). The top of the refrigerant conveying pipe (11) is connected to the refrigerant input pipe (6), and the bottom of the refrigerant conveying pipe (11) is connected to the refrigerant output pipe (7). The refrigerant is input through the refrigerant input pipe (6), passes through the refrigerant conveying pipe (11), and is discharged through the refrigerant output pipe (7).

3. The apparatus for recovering yellow phosphorus from yellow phosphorus furnace gas according to claim 1, characterized in that, The refrigerant delivery pipe (11) is arranged in a spiral shape within the recovery channel (10).

4. The apparatus for recovering yellow phosphorus from yellow phosphorus furnace gas according to claim 1, characterized in that, The bottom of the tower body (1) is provided with a recycling pool (3), which is connected to the tower body (1). A cleaning port (4) is provided on the side wall of the recycling pool (3), and a door panel is provided on the cleaning port (4).

5. The apparatus for recovering yellow phosphorus from yellow phosphorus furnace gas according to claim 3, characterized in that, The recovery channel (10) is vertically connected to a gas supply branch pipe (13). The top ends of multiple gas supply branch pipes (13) are connected to a diversion pipe (12). The diversion pipe (12) is fixed at the top of the tower body (1). An air inlet pipe (8) is connected to the diversion pipe (12). The air inlet pipe (8) extends out of the tower body (1) and is used to input inert gas.

6. The apparatus for recovering yellow phosphorus from yellow phosphorus furnace gas according to claim 5, characterized in that, The top and bottom of the gas supply branch pipe (13) extend out of the inner cylinder (9), and the gas supply branch pipe (13) is inserted into the spiral refrigerant supply pipe (11). Several gas nozzles (14) are provided on the side wall of the gas supply branch pipe (13).

7. The apparatus for recovering yellow phosphorus from yellow phosphorus furnace gas according to claim 6, characterized in that, The air nozzle (14) is arranged at a downward angle.

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