Yellow phosphorus tail gas water seal automatic pollution discharge device

Abstract

The utility model discloses a yellow phosphorus tail gas water seal automatic blowdown device. According to the technical scheme, the yellow phosphorus tail gas water seal automatic blowdown device comprises a U-shaped water seal, one side of the U-shaped water seal is connected with a water supplementing pipe, the bottom of the U-shaped water seal is connected with a blowdown pipe, an electric tracing band is wound on the blowdown pipe, a heat preservation layer wraps the outer portion of the electric tracing band, and the blowdown pipe is connected to the interior of a sewage pool. The utility model has the beneficial effects that (1) the device can flexibly adjust the heating temperature according to the season change, and does not need to use steam to heat the blow-off pipe to cause resource waste; (2) the electric tracing band is further coated with a heat insulation layer, so that the temperature loss is slower, the heating effect is enhanced, and the resource waste is further reduced; and (3) the water replenishing pneumatic valve and the pollution discharge pneumatic valve arranged on the device can discharge pollution without manually opening the valves on site, pollution discharge can be carried out remotely, a manual valve is not cancelled, and manual operation can be carried out when the pneumatic valves fail or are overhauled, so that the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of water seal sewage discharge devices, and particularly relates to an automatic sewage discharge device for yellow phosphorus tail gas water seal. Background Technique

[0002] Yellow phosphorus is one of the extremely important chemical raw materials in our country. Most yellow phosphorus production enterprises in our country adopt the electric furnace method to produce phosphorus. In the electric furnace, phosphorus ore, white coal, and silica are subjected to a reduction reaction at about 1500 °C to generate yellow phosphorus furnace gas, that is, a mixed gas of yellow phosphorus vapor and coal gas. Through the gas duct, it enters the spray tower and then the main product yellow phosphorus and yellow phosphorus tail gas are separated.

[0003] Yellow phosphorus tail gas is one of the largest by-products in industrial yellow phosphorus production. Yellow phosphorus tail gas is colorless, odorless, toxic, insoluble in water, and its explosion limit is 12.5% - 74.2%. Usually, yellow phosphorus tail gas is stored in a gas holder through subsequent water scrubbers, buffer tanks, etc. for continuous use downstream.

[0004] In the process of low-sulfur yellow phosphorus production, there are relatively high requirements for the sulfur content in the raw material phosphorus ore. At the same time, the use ratio of optoelectronic ore dressing and returned phosphorus ore is increased, resulting in changes in the gas composition. More micron-sized mechanical dust adheres to the gas pipeline. Sometimes, the pipeline of the yellow phosphorus tail gas water seal sewage discharge will be blocked, affecting the normal production of yellow phosphorus.

[0005] For the safe use and convenient maintenance of yellow phosphorus tail gas, a yellow phosphorus tail gas water seal is installed. Most of the current chemical plants usually adopt the manual sewage discharge method for the gas water seal. The operator needs to open the sewage discharge valve below the yellow phosphorus tail gas water seal at the gas holder site, which is extremely prone to gas poisoning or safety and environmental protection accidents. If the valve or pipeline of the yellow phosphorus tail gas water seal is blocked, steam will be used to continuously heat the gas water seal valve and pipeline, which is prone to scalding accidents. Moreover, a large amount of steam used to heat the gas water seal valve and pipeline will also cause waste of resources. Summary of the Invention

[0006] Aiming at the shortcomings of safety problems and resource waste in the existing technology where steam is used to heat the water seal valve and pipeline, the utility model provides an automatic sewage discharge device for yellow phosphorus tail gas water seal. The technical solution is as follows: it includes a U-shaped water seal. One side of the U-shaped water seal is connected to a makeup water pipe, the bottom of the U-shaped water seal is connected to a sewage discharge pipe, an electric heating tape is wound around the sewage discharge pipe, the outside of the electric heating tape is wrapped with a heat insulation layer, and the sewage discharge pipe is connected to the inside of a sewage pool.

[0007] As a preferred solution, a makeup water pneumatic valve and a makeup water manual valve are arranged on the makeup water pipe.

[0008] As a preferred solution, a sewage discharge manual valve and a sewage discharge pneumatic valve are arranged on the sewage discharge pipe.

[0009] As a preferred solution, an overflow pipe is provided on the other side of the U-shaped water seal, and the overflow pipe is connected to the sewage pipe.

[0010] As a preferred solution, a liquid level gauge is also provided on the U-shaped water seal.

[0011] As a preferred solution, a temperature sensor is provided at the outlet of the sewage pipe, and the temperature sensor transmits data to a temperature control box, and the temperature control box controls the heating temperature of the electric tracing band.

[0012] As a preferred solution, the lowest point of the U-shaped water seal is higher than the highest point of the sewage tank.

[0013] Advantages of the present utility model:

[0014] (1) The device remotely controls the temperature of the electric tracing band through the temperature control box and the feedback temperature of the temperature sensor to the temperature control box, and heats the sewage pipe of the yellow phosphorus water seal. The heating temperature can be flexibly adjusted according to seasonal changes, and there is no need to use steam to heat the sewage pipe, resulting in waste of resources.

[0015] (2) The device further wraps a heat preservation layer on the electric tracing band, making the temperature loss slower, strengthening the heating effect, and further reducing waste of resources.

[0016] (3) The water replenishment pneumatic valve and the sewage discharge pneumatic valve provided in the device can discharge sewage without manually opening the valve on-site, and can be remotely controlled for sewage discharge. Moreover, the manual valve is not cancelled, and manual operation can also be carried out when the pneumatic valve fails or is under maintenance, improving work efficiency. Description of the drawings

[0017] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0018] Figure 2 It is an enlarged view of the sewage pipe, the electric tracing band and the heat preservation layer in the present utility model.

[0019] In the figure: 1, water replenishment pipe; 2, U-shaped water seal; 3, overflow pipe; 4, water replenishment pneumatic valve; 5, water replenishment manual valve; 6, liquid level gauge; 7, sewage pipe; 8, electric tracing band; 9, heat preservation layer; 10, sewage discharge manual valve; 11, sewage discharge pneumatic valve; 12, temperature sensor; 13, sewage tank; 14, temperature control box. Specific implementation manners

[0020] The following further describes the present utility model in detail according to the drawings and specific embodiments.

[0021] Embodiment

[0022] As Figure 1-2A yellow phosphorus tail gas water seal automatic sewage discharge device shown in the figure includes a U-shaped water seal 2. One side of the U-shaped water seal 2 is connected to a make-up water pipe 1, and the bottom of the U-shaped water seal 2 is connected to a sewage discharge pipe 7. An electric tracing band 8 is wound around the sewage discharge pipe 7, and a heat preservation layer 9 is wrapped outside the electric tracing band 8. The sewage discharge pipe 7 is connected to the inside of a sewage pool 13. The electric tracing band 8 on the sewage discharge pipe 7 heats the sewage discharge pipe 7 to prevent phosphorus sludge and elemental phosphorus from blocking the sewage discharge pipe 7, and the heat preservation layer 9 reduces heat loss and strengthens the heat preservation effect.

[0023] Furthermore, a make-up water pneumatic valve 4 and a make-up water manual valve 5 are arranged on the make-up water pipe 1. The addition of the pneumatic valve enables remote control for make-up water operation. The make-up water manual valve 5 is normally open. When the make-up water pneumatic valve 4 fails or needs to be repaired, the make-up water manual valve 5 is enabled.

[0024] Furthermore, a sewage discharge manual valve 10 and a sewage discharge pneumatic valve 11 are arranged on the sewage discharge pipe 7. The addition of the pneumatic valve enables remote control for sewage discharge operation. The sewage discharge manual valve 10 is normally open. When the sewage discharge pneumatic valve 11 fails or needs to be repaired, the sewage discharge manual valve 10 is enabled.

[0025] Furthermore, an overflow pipe 3 is provided on the other side of the U-shaped water seal 2. The overflow pipe 3 is connected to the sewage discharge pipe 7 to prevent the water volume in the U-shaped water seal 2 from being excessive. When the water level is higher than the inlet of the overflow pipe 3, the excess water is discharged into the sewage discharge pipe 7 through the overflow pipe 3 and finally enters the sewage pool 13.

[0026] Furthermore, a liquid level gauge 6 is also provided on the U-shaped water seal 2 to record the liquid level of the U-shaped water seal 2.

[0027] Furthermore, a temperature sensor 12 is arranged at the outlet of the sewage discharge pipe 7. The temperature sensor 12 transmits data to a temperature control box 14. The temperature control box 14 controls the heating temperature of the electric tracing band 8. The temperature sensor 12 transmits the temperature in the sewage discharge pipe 7 to the temperature control box 14, and the temperature control box 14 heats the electric tracing band 8 according to the set temperature to prevent waste of resources caused by continuous heating.

[0028] Furthermore, the lowest part of the U-shaped water seal 2 is higher than the highest part of the sewage pool 13, forming a certain gravitational potential difference, which is convenient for sewage discharge operation.

[0029] With the above device, its operation process is as follows: Set the temperature parameter of the temperature control box 14. The temperature sensor 12 detects the water temperature in the sewage discharge pipe 7. When the water temperature is lower than the parameter value, the temperature control box 14 energizes the electric heating tape 8 to heat the sewage discharge pipe 7 so that the phosphorus sludge and elemental phosphorus in the pipe remain in a molten state, so as to flush them out of the sewage discharge pipe 7 into the sewage tank 13 when starting sewage discharge. When the water temperature is higher than the parameter value, the temperature control box 14 cuts off the power supply to the electric heating tape 8 to prevent waste of electric power resources; when the liquid level gauge 6 detects that the water level in the U-shaped water seal 2 is lower than the parameter value, the water replenishing pneumatic valve 4 opens to replenish water into the U-shaped water seal 2.

Claims

1. A yellow phosphorus tail gas water seal automatic sewage discharge device, comprising a U-shaped water seal (2), one side of the U-shaped water seal (2) is connected to a water supply pipe (1), characterized in that: The bottom of the U-shaped water seal (2) is connected to a sewage pipe (7), an electric heating tape (8) is wound around the sewage pipe (7), the outside of the electric heating tape (8) is wrapped with an insulation layer (9), and the sewage pipe (7) is connected to the inside of a sewage pool (13).

2. The yellow phosphorus tail gas water seal automatic sewage discharge device according to claim 1 is characterized in that: The water supply pipe (1) is provided with a water supply pneumatic valve (4) and a water supply manual valve (5).

3. The yellow phosphorus tail gas water seal automatic sewage discharge device according to claim 1, characterized in that: The sewage discharge pipe (7) is provided with a sewage discharge manual valve (10) and a sewage discharge pneumatic valve (11).

4. The yellow phosphorus tail gas water seal automatic sewage discharge device according to claim 1, characterized in that: An overflow pipe (3) is provided on the other side of the U-shaped water seal (2), and the overflow pipe (3) is connected to a sewage pipe (7).

5. The yellow phosphorus tail gas water seal automatic sewage discharge device according to claim 1, characterized in that: The U-shaped water seal (2) is also provided with a liquid level gauge (6).

6. The yellow phosphorus tail gas water seal automatic sewage discharge device according to claim 1, characterized in that: A temperature sensor (12) is provided at the outlet of the sewage pipe (7), and the temperature sensor (12) transmits data to a temperature control box (14), and the temperature control box (14) controls the heating temperature of the electric heating belt (8).

7. The yellow phosphorus tail gas water seal automatic sewage discharge device according to claim 1, characterized in that: The lowest point of the U-shaped water seal (2) is higher than the highest point of the sewage pool (13).

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