Yellow phosphorus tail gas full recycling system

Abstract

The utility model discloses a yellow phosphorus tail gas full recycling system, and belongs to the technical field of yellow phosphorus tail gas treatment. The yellow phosphorus tail gas purification device solves the problem that in the prior art, the purification amount of yellow phosphorus tail gas is not certainly matched with the demand amount of a user side, and potential safety hazards or waste exists, and comprises a gas collection main pipe and at least one yellow phosphorus tail gas purification production line, and the gas collection main pipe comprises a gas inlet part, a gas storage part and a gas using part; the gas storage part is located between the gas utilization part and the gas inlet part, the gas outlet end of each yellow phosphorus tail gas purification production line is connected with the gas inlet part through a gas collection branch pipe, the gas utilization part is connected with each user side through a plurality of gas supply pipes, and the gas storage part is connected with a wet gas holder through a gas storage pipe. According to the utility model, the tail gas is concentrated in the gas collection main pipe for unified allocation, redundant purified tail gas can automatically enter the wet type gas cabinet for storage, and when the tail gas is insufficient, the tail gas in the wet type gas cabinet is conveyed into the gas collection main pipe, so that the gas utilization requirement of a user side is met, and the waste of the gas is also effectively avoided.

Description

Technical Field

[0001] This utility model belongs to the field of yellow phosphorus tail gas treatment technology, specifically relating to a yellow phosphorus tail gas full recovery and utilization system. Background Technology

[0002] The electric furnace is the main equipment for yellow phosphorus production. It involves adding a mixture of qualified phosphate rock, silica, and coke in a specific ratio to the furnace, where a reduction reaction takes place at 1300–1500°C. The resulting phosphorus-containing furnace gas is then dedusted, condensed, and refined to produce the finished yellow phosphorus. Byproducts such as slag and ferrophosphorus are periodically discharged from the bottom of the furnace. Therefore, strict requirements are placed on the insulation materials, refractory materials, and refractory brick structure of the furnace lining.

[0003] After purification, the yellow phosphorus tail gas is sent to various user ports for recycling. However, the amount of purified yellow phosphorus tail gas fluctuates greatly. Therefore, the amount of purified yellow phosphorus tail gas produced at any given time may not be exactly matched with the demand at the user end. If the demand at the user end is greater than the processing capacity, it cannot meet the user end's demand. If the demand at the user end is less than the processing capacity, it may cause excessive pressure in the purification system and lead to an explosion. If the excess purified yellow phosphorus tail gas is discharged, it will result in waste. Utility Model Content

[0004] In view of the problem that the purification capacity of yellow phosphorus tail gas in the existing technology may not match the demand of users, resulting in safety hazards or waste, this utility model provides a yellow phosphorus tail gas full recovery and utilization system.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A system for the complete recovery and utilization of yellow phosphorus tail gas includes a main gas collection pipe and at least one yellow phosphorus tail gas purification production line. The main gas collection pipe includes an inlet section, a storage section, and a consumption section. The storage section is located between the consumption section and the inlet section. The outlet of each yellow phosphorus tail gas purification production line is connected to the inlet section through a gas collection branch pipe. The consumption section is connected to each user end through several gas supply pipes. The storage section is connected to a wet gas holder through a storage pipe.

[0007] By adopting this technical solution, the exhaust gas purified by each yellow phosphorus exhaust gas purification production line is concentrated in the gas collection main pipe for unified allocation. When the purification volume exceeds the user's demand, the excess purified exhaust gas can be automatically stored in a wet gas holder. When the purification volume is insufficient to support the user's demand, the exhaust gas in the wet gas holder is transported to the gas collection main pipe to meet the user's gas demand and effectively avoid gas waste.

[0008] Preferably, each of the gas collecting branch pipes is connected to a flow monitoring mechanism, and the gas storage pipe is equipped with an electric valve. Both the flow monitoring mechanism and the electric valve are electrically connected to a controller.

[0009] After adopting this technical solution, the flow monitoring mechanism can monitor the output of yellow phosphorus tail gas purified by each yellow phosphorus tail gas purification production line. When the output exceeds the user's demand, the electric valve can be opened so that the excess yellow phosphorus tail gas can enter the wet gas holder through the gas storage pipe.

[0010] Preferably, the wet gas holder is a multi-section wet gas holder.

[0011] After adopting this technical solution, the wet gas holder is a multi-section wet gas holder that can store a large amount of yellow phosphorus tail gas.

[0012] Preferably, the yellow phosphorus tail gas purification production line includes a yellow phosphorus tail gas outlet pipe connected at one end to the gas collection main pipe. The yellow phosphorus tail gas outlet pipe is equipped with a pressure regulating mechanism and a tail gas purification mechanism. The pressure regulating mechanism is equipped with a pressure relief mechanism and a pressure stabilizing mechanism.

[0013] This technical solution employs a two-stage safety treatment system: a pressure stabilizing mechanism and a pressure relief mechanism. When the exhaust gas from the yellow phosphorus electric furnace is discharged, a pressure between 120-450 Pa is considered safe, and the pressure relief mechanism prevents any exhaust gas from being discharged. The floating tank in the pressure stabilizing mechanism adjusts the size of the pressure regulating chamber according to the pressure level, thus regulating the exhaust gas pressure. When the exhaust gas pressure exceeds 450 Pa, some gas is discharged through the pressure relief mechanism to achieve pressure relief. Simultaneously, the liquid seal in the pressure relief mechanism effectively prevents air from entering the liquid seal tank through the chimney and coming into contact with the high-temperature exhaust gas, which could lead to an explosion. This two-stage safety treatment system, combined with a wet gas holder, ensures both the safety of the yellow phosphorus exhaust gas purification and its complete recovery and reuse.

[0014] Preferably, the pressure relief mechanism includes a chimney and a chimney safety water seal mechanism.

[0015] After adopting this technical solution, the pressure stabilizing mechanism includes a liquid storage tank, which contains liquid and a floating tank that can float in the liquid. The space between the floating tank and the liquid surface forms a pressure regulating cavity. The liquid storage tank is connected to a pressure stabilizing pipe. One end of the pressure stabilizing pipe is connected to the yellow phosphorus tail gas outlet pipe, and the other end extends out of the liquid and is located inside the floating tank.

[0016] Preferably, the exhaust gas purification mechanism includes a water washing mechanism, an exhaust fan, a Venturi scrubber, and an alkaline washing mechanism connected in series on the yellow phosphorus exhaust gas outlet pipe.

[0017] After adopting this technical solution, the yellow phosphorus tail gas is purified through a water washing mechanism, a Venturi scrubber, and an alkaline washing mechanism, ensuring the purification effect of the yellow phosphorus tail gas.

[0018] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are:

[0019] 1. This utility model concentrates the tail gas purified by each yellow phosphorus tail gas purification production line into the gas collection main pipe for unified allocation. When the purification volume exceeds the user's demand, the excess purified tail gas can be automatically stored in a wet gas holder. When the purification volume is insufficient to support the user's demand, the tail gas in the wet gas holder is transported to the gas collection main pipe to meet the user's gas demand and effectively avoid gas waste.

[0020] 2. This utility model employs a two-stage safety treatment device: a pressure stabilizing mechanism and a pressure relief mechanism. When the exhaust gas from the yellow phosphorus electric furnace is discharged, a pressure between 120-450 Pa is considered a safe pressure, and the pressure relief mechanism will not discharge any more exhaust gas. The floating tank in the pressure stabilizing mechanism can adjust the size of the pressure regulating chamber according to the pressure level, thereby regulating the pressure of the exhaust gas. When the exhaust gas pressure exceeds 450 Pa, some gas will be discharged through the pressure relief mechanism to achieve pressure relief. Simultaneously, the liquid seal in the pressure relief mechanism effectively prevents air from entering the liquid seal tank through the chimney and coming into contact with the high-temperature exhaust gas, thus preventing an explosion. The two-stage safety treatment device, combined with the wet gas holder, ensures both the safety of the yellow phosphorus exhaust gas purification and the complete recovery and reuse of the exhaust gas. Attached Figure Description

[0021] This utility model will be described by way of example and with reference to the accompanying drawings, wherein:

[0022] Figure 1 This is a schematic diagram of the structure of this utility model;

[0023] Figure 2 This is a schematic diagram of the pressure relief mechanism;

[0024] Figure 3 This is a schematic diagram of the voltage stabilizing mechanism;

[0025] Wherein: 1-Pressure relief mechanism, 101-Pressure relief pipe, 102-Pressure relief tank, 103-Chimney, 2-Pressure stabilizing mechanism, 201-Pressure stabilizing pipe, 202-Tank edge, 203-Storage tank, 204-Floating tank, 3-Yellow phosphorus tail gas outlet pipe, 4-Water washing mechanism, 5-Venturi scrubber, 6-Alkali washing mechanism, 7-Controller, 8-Exhaust fan, 9-Air inlet, 10-Gas storage, 11-Gas consumption, 12-Wet gas holder. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0027] In the description of the embodiments of this application, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0028] The following is combined Figures 1-3 This utility model will be described in detail.

[0029] Example 1

[0030] like Figure 1 As shown, a system for the complete recovery and utilization of yellow phosphorus tail gas is characterized by comprising a gas collection main pipe and four yellow phosphorus tail gas purification production lines. The gas collection main pipe includes an air inlet 9, a gas storage section 10, and a gas consumption section 11. The gas storage section 10 is located between the gas consumption section 11 and the air inlet 9. The outlet of each of the yellow phosphorus tail gas purification production lines is connected to the air inlet 9 through a gas collection branch pipe. The gas consumption section 11 is connected to each user end through several gas supply pipes. The gas storage section 10 is connected to a wet gas holder 12 through a gas storage pipe.

[0031] In this embodiment, the wet gas holder 12 is a multi-section wet gas holder. The specific size of the multi-section wet gas holder 12 is determined according to the amount of yellow phosphorus tail gas and can be selected as needed. In other embodiments, a single-section wet gas holder can also be selected. The structure of the wet gas holder 12 is the same as that of the prior art, so it will not be described in detail here.

[0032] In other embodiments, other appropriate numbers of yellow phosphorus tail gas purification production lines may be set up as needed.

[0033] In this embodiment, the yellow phosphorus tail gas purification production line includes a tail gas purification mechanism, which includes a water washing mechanism 4, an exhaust fan 8, a Venturi scrubber 5, and an alkaline washing mechanism 6 connected in series on the yellow phosphorus tail gas outlet pipe 3. In this embodiment, the water washing mechanism 4, the exhaust fan 8, the Venturi scrubber 5, and the alkaline washing mechanism 6 are connected in series. In other embodiments, the positions of each purification mechanism can be exchanged as needed, and the number, number, or changes of purification mechanisms can also be made accordingly, as long as the impurities in the yellow phosphorus tail gas can be removed.

[0034] The method of using this utility model is as follows:

[0035] After being purified by the exhaust gas purification mechanism, the yellow phosphorus exhaust gas is fed into the main exhaust gas collection pipe for unified distribution. When the purification volume exceeds the user's demand, the excess purified exhaust gas can be automatically stored in the wet gas holder 12 under the action of gas pressure difference. When the purification volume is insufficient to support the user's demand, the exhaust gas in the wet gas holder 12 is sent to the main exhaust gas collection pipe to meet the user's gas demand and effectively avoid gas waste.

[0036] Example 2

[0037] This embodiment is basically the same as embodiment 1, except that:

[0038] In this embodiment, as Figure 2-3 As shown, the yellow phosphorus tail gas purification production line includes a yellow phosphorus tail gas outlet pipe 3 connected to the gas collection main pipe at one end. The yellow phosphorus tail gas outlet pipe 3 is equipped with a pressure regulating mechanism and a tail gas purification mechanism. The pressure regulating mechanism is equipped with a pressure relief mechanism 1 and a pressure stabilizing mechanism 2.

[0039] In this embodiment, a liquid-sealed tank is included, containing a liquid-sealing liquid. The tank is connected to a pressure relief pipe 101, one end of which is connected to a yellow phosphorus tail gas outlet pipe 3, and the other end is located within the liquid-sealing liquid. A chimney 103 is installed on the liquid-sealed tank. When the yellow phosphorus electric furnace tail gas pressure exceeds 450 Pa, some gas is discharged through the pressure relief mechanism to achieve pressure relief. Simultaneously, the liquid seal in the pressure relief mechanism effectively prevents air from entering the liquid-sealed tank through the chimney and coming into contact with the high-temperature yellow phosphorus electric furnace tail gas, thus preventing an explosion.

[0040] In this embodiment, the pressure stabilizing mechanism 2 includes a liquid storage tank 203, which contains liquid and a floating tank 204 that can float within the liquid. The space between the floating tank 204 and the liquid surface forms a pressure regulating chamber. The liquid storage tank 203 is connected to a pressure stabilizing pipe 201, one end of which is connected to the yellow phosphorus tail gas outlet pipe 3, and the other end extends out of the liquid and is located inside the floating tank 204. The floating tank 204 has an outwardly protruding tank rim 202. A limit block is provided at the opening of the liquid storage tank 203 corresponding to the tank rim 202, with the end face of the limit block close to the liquid surface. As more gas enters the pressure regulating chamber, the floating tank 204 is gradually pushed up. When the opening of the floating tank 204 reaches the limit block, it can restrict the floating tank 204 from continuing to float upward, preventing the floating tank 204 from detaching from the liquid storage tank. In other embodiments, the liquid level can be set lower to prevent the floating tank 204 from floating to its limit and detaching from the storage tank 203. In contrast, setting a limiting block and tank edge 202 allows for a higher liquid level while maintaining the same height as the storage tank 203, increasing the time for liquid-to-gas exchange and improving the cooling effect of the exhaust gas. The two-stage safety treatment device, in conjunction with the wet gas holder 12, ensures both the safety of yellow phosphorus exhaust gas purification and the complete recovery and utilization of yellow phosphorus exhaust gas.

[0041] Example 3

[0042] This embodiment is basically the same as embodiment 1, except that:

[0043] Each of the gas collecting branch pipes is connected to a flow monitoring mechanism, and an electric valve is installed on the gas storage pipe. Both the flow monitoring mechanism and the electric valve are electrically connected to a controller 7. The controller 7 is a DCS controller. The flow monitoring mechanism can monitor the output of yellow phosphorus tail gas purified by each yellow phosphorus tail gas purification line. When the output exceeds the user's demand, the electric valve can be opened, allowing the excess yellow phosphorus tail gas to enter the wet gas holder 12 through the gas storage pipe.

[0044] The embodiments described above merely illustrate specific implementation methods of this application, and while the descriptions are detailed and specific, they should not be construed as limiting the scope of protection of this application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the technical solution of this application, and these modifications and improvements all fall within the scope of protection of this application.

Claims

1. A system for the complete recovery and utilization of yellow phosphorus tail gas, characterized in that: It includes a gas collection main pipe and at least one yellow phosphorus tail gas purification production line. The gas collection main pipe includes an air inlet (9), a gas storage section (10), and a gas consumption section (11). The gas storage section (10) is located between the gas consumption section (11) and the air inlet (9). The gas outlet of each of the yellow phosphorus tail gas purification production lines is connected to the air inlet (9) through a gas collection branch pipe. The gas consumption section (11) is connected to each user end through several gas supply pipes. The gas storage section (10) is connected to a wet gas holder (12) through a gas storage pipe.

2. The yellow phosphorus tail gas complete recovery and utilization system according to claim 1, characterized in that: Each of the gas collecting branch pipes is connected to a flow monitoring mechanism, and the gas storage pipe is equipped with an electric valve. The flow monitoring mechanism and the electric valve are both electrically connected to a controller (7).

3. The yellow phosphorus tail gas complete recovery and utilization system according to claim 1, characterized in that: The wet gas holder (12) is a multi-section wet gas holder.

4. A yellow phosphorus tail gas complete recovery and utilization system according to any one of claims 1-3, characterized in that: The yellow phosphorus tail gas purification production line includes a yellow phosphorus tail gas outlet pipe (3) connected to the gas collection main pipe at one end. The yellow phosphorus tail gas outlet pipe (3) is equipped with a pressure regulating mechanism and a tail gas purification mechanism. The pressure regulating mechanism is equipped with a pressure relief mechanism (1) and a pressure stabilizing mechanism (2).

5. The yellow phosphorus tail gas complete recovery and utilization system according to claim 4, characterized in that: It includes a liquid seal tank, which contains a liquid seal liquid. The liquid seal tank is connected to a pressure relief pipe (101). One end of the pressure relief pipe (101) is connected to a yellow phosphorus tail gas outlet pipe (3), and the other end is located inside the liquid seal liquid. A chimney (103) is provided on the liquid seal tank.

6. The yellow phosphorus tail gas complete recovery and utilization system according to claim 4, characterized in that: The pressure stabilizing mechanism (2) includes a liquid storage tank (203), which contains liquid and a floating tank (204) that can float in the liquid. The space between the floating tank (204) and the liquid surface forms a pressure regulating chamber. The liquid storage tank (203) is connected to a pressure stabilizing pipe (201). One end of the pressure stabilizing pipe (201) is connected to the yellow phosphorus tail gas outlet pipe (3), and the other end extends out of the liquid and is located in the floating tank (204).

7. The yellow phosphorus tail gas complete recovery and utilization system according to claim 4, characterized in that: The exhaust gas purification mechanism includes a water washing mechanism (4), an exhaust fan (8), a Venturi scrubber (5), and an alkaline washing mechanism (6) connected in series with the yellow phosphorus exhaust gas outlet pipe (3).

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