CN111408167A - A slag discharge circulation system - Google Patents

Abstract

The invention relates to a slag discharge circulation system, and belongs to the technical field of metallurgy. Comprises a water seal tank and a sedimentation tank arranged below the water seal tank; one end of the water-sealed tank is provided with a slag discharge pipeline, and the slag discharge pipeline is inserted into the sedimentation tank to discharge the slag-water mixture in the water-sealed tank into the sedimentation tank; the other end of the water seal tank is provided with a water return pipeline, the water return pipeline is inserted into the sedimentation tank, and water separated by the sedimentation tank is lifted into the water seal tank through a circulating water pump which is arranged in the sedimentation tank and connected with the water return pipeline. The system realizes the circular flow of water in the water seal tank, is favorable for thoroughly discharging accumulated slag, prevents the accumulated slag from hardening in the water seal tank, and maintains the cleanness of the water in the water seal tank, thereby ensuring the normal performance of the sealing and isolating functions of the water seal tank.

Description

A slag discharge circulation system

technical field

The invention belongs to the technical field of metallurgy, and relates to a slag discharge circulation system.

Background technique

In the metallurgical industry, high-temperature heating equipment such as heating furnaces and high-temperature reduction equipment for carbon-containing metal pellets need to be equipped with water sealing grooves to ensure the isolation of the furnace atmosphere from the external environment. In the above-mentioned high-temperature heating equipment, there is a large amount of dust in the furnace, and these dusts gradually fall into the water sealing tank to form sludge-like, granular and other slag deposits. More materials fall into the water seal tank, resulting in more slag accumulation in the water seal tank, and the material characteristics of the accumulated slag are complex. If the accumulated slag cannot be effectively discharged, it will accumulate and harden in the water seal tank, and then the water seal tank will lose the function of isolating furnace gas, and the consequences are very serious.

The existing slag discharge method is to remove the slag accumulated in the water seal tank through mechanical slag discharge equipment, and the water in the water seal tank does not circulate. There is a jamming failure, and there will still be some sludge-like slag at the bottom of the water seal tank that cannot be discharged, and it will harden in the water seal tank for a long time.

SUMMARY OF THE INVENTION

In view of this, the purpose of the present invention is to provide a slag discharge circulation system with a high degree of automation, a simple structure, and a clean and thorough slag discharge effect. Incomplete slag discharge in the sealing tank causes slag accumulation and hardening, which leads to the problem that the water sealing tank loses the function of isolating furnace gas.

To achieve the above object, the present invention provides the following technical solutions:

A slag discharge circulation system includes a water seal tank and a sedimentation tank arranged below the water seal tank; one end of the water seal tank is provided with a slag discharge pipe, and the slag discharge pipe is inserted into the sedimentation tank to displace the water seal tank into the water seal tank. The slag-water mixture is discharged into the sedimentation tank; the other end of the water seal tank is provided with a return water pipe, the return water pipe is inserted into the sedimentation tank, and the circulating water pump connected to the return water pipe is arranged in the sedimentation tank, and the The water separated from the sedimentation tank is lifted into the water seal tank.

Further, it also includes a water supply pipeline, which is connected to the water supply pipeline network in the factory area and points to the notch of the water seal tank, so as to replenish new water into the water seal tank.

Further, a movable slag scraping mechanism is arranged in the water seal tank to send the accumulated slag in the water seal tank to the slag discharge pipeline.

Further, the water sealing tank is provided with a water sealing tank liquid level gauge, and a backwater regulating valve is provided on the section of the backwater pipe that is exposed to the sedimentation tank.

Further, the sedimentation tank is provided with a sedimentation tank level gauge, and the water supply pipeline is provided with a water supply regulating valve.

Further, the slag discharge pipeline is provided with a slag discharge cut-off valve.

Further, the sedimentation tank includes a sedimentation area and a clean water area, the slag discharge pipeline is inserted into the sedimentation area of the sedimentation tank, the return water pipeline is inserted into the clean water area of the sedimentation tank, and the circulating water pump is arranged in the clean water area of the sedimentation tank. .

The beneficial effects of the present invention are:

(1) The present invention connects the water seal tank and the sedimentation tank, and discharges the slag-water mixture in the water-sealed tank into the sedimentation tank through the slag discharge pipeline, and the sedimentation tank performs precipitation and separation treatment on the slag-water mixture, and the separated clean The clean water is pumped back into the water seal tank through the circulating water pump and the return water pipeline connected to it, realizing the circulating flow of water in the water seal tank, which is conducive to the complete discharge of the slag, prevents the slag from hardening in the water seal tank, and maintains the water seal. The water in the tank is clean, so as to ensure the normal performance of the sealing and isolation functions of the water seal tank.

(2) The present invention monitors the liquid level of the water seal tank in real time through the liquid level gauge of the water seal tank, and automatically adjusts the opening of the return water regulating valve according to the feedback data of the water seal tank liquid level gauge, so as to adjust the flow rate of the return water and ensure the liquid level of the water seal tank. The position is stable, and the dynamic balance of slag discharge and return water is realized.

(3) The present invention monitors the liquid level of the sedimentation tank in real time through the liquid level gauge of the sedimentation tank, and when the liquid level of the sedimentation tank is too low, the water replenishment regulating valve is automatically opened to inject water into the water seal tank to replenish new water for the system.

(4) The present invention has a high degree of automation, a simple system structure, and is economical and reliable.

Description of drawings

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention provides the following drawings for description:

FIG. 1 is a schematic structural diagram of a slag discharge circulation system.

Reference numerals: water seal tank 1, slag discharge pipeline 2, slag discharge cut-off valve 3, sedimentation tank 4, circulating water pump 5, return water pipeline 6, return water regulating valve 7, water supply pipeline 8, water supply regulating valve 9, sedimentation tank Liquid level gauge 10 , water seal tank liquid level gauge 11 , movable slag scraping mechanism 12 , sediment 13 , overflow port 14 .

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

As shown in FIG. 1 , this embodiment provides a slag discharge circulation system, including a water seal tank 1 and a sedimentation tank 4 arranged below the water seal tank 1; one end of the water seal tank 1 is provided with a slag discharge pipe 2, The slag discharge pipe 2 is inserted into the sedimentation tank 4 to discharge the slag-water mixture in the water seal tank 1 into the sedimentation tank 4; the other end of the water seal tank 1 is provided with a return water pipe 6, and the return water pipe 6 It is inserted into the sedimentation tank 4, and the water separated by the sedimentation tank 4 is lifted into the water seal tank 1 through the circulating water pump 5 arranged in the sedimentation tank 4 and connected with the return water pipeline 6.

Specifically, the sedimentation tank 4 includes a sedimentation area and a clean water area, the slag discharge pipeline 2 is inserted into the sedimentation area of the sedimentation tank 4, the return water pipeline 6 is inserted into the clean water area of the sedimentation tank 4, and the circulating water pump 5 Set in the clean water area of the sedimentation tank 4. An overflow port 14 is opened on the wall of the sedimentation tank 4 above the normal liquid level position of the sedimentation tank 4 . The slag discharge circulation system also includes a water replenishment pipeline 8 , which is connected to the water replenishment pipe network in the plant area and points to the notch of the water seal tank 1 to replenish new water into the water seal tank 1 . The clear water area of the sedimentation tank 4 is provided with a sedimentation tank liquid level gauge 10, and the supplementary water pipeline 8 is provided with a supplemental water regulating valve 9 for controlling the on-off state and flow rate of the supplementary water. The water sealing tank 1 is provided with a water sealing tank liquid level gauge 11, and the section of the backwater pipe 6 exposed to the sedimentation tank 4 is provided with a backwater regulating valve 7 for controlling the on-off state of the backwater and the flow rate of the backwater. . The water seal tank 1 is provided with a movable slag scraping mechanism 12 to send the accumulated slag in the water seal tank 1 to the slag discharge pipeline 2 . The slag discharge pipeline 2 is provided with a slag discharge cut-off valve 3 for controlling the on-off state of the slag discharge.

When starting the slag discharge circulation system for the first time, firstly inject clean water into the water seal tank 1 and the sedimentation tank 4 until they reach the normal water seal tank liquid level and sedimentation tank liquid level respectively; then open the slag discharge cut-off valve 3 to make The slag discharge pipe 2 is in a conducting state, and the slag-water mixture in the water seal tank 1 flows to the slag discharge pipe 2 under the action of the movable slag scraping mechanism 12, and flows into the sedimentation area of the sedimentation tank 4 through the slag discharge pipe 2. The accumulated slag in the slag-water mixture in the area settles to the bottom of the tank to form a sediment 13, and the water in the slag-water mixture is separated and enters the clean water area of the sedimentation tank 4; synchronously open the circulating water pump 5 to pass the water in the clean water area through the return pipe 6 Send it back to the water seal tank 1, and at the same time, the water seal tank liquid level gauge 11 monitors the water seal tank liquid level in real time, and returns the monitoring data to the automatic control system. The automatic control system feeds back the data according to the water seal tank liquid level gauge 11. The opening degree of the return water regulating valve 7 is controlled to adjust the flow rate of the return water, to ensure the stability of the liquid level of the water seal tank, and to realize the dynamic balance of slag discharge and return water; Return the monitoring data to the automatic control system. If the liquid level of the sedimentation tank is too high, it will be discharged from the overflow port 14; The opening degree of the valve 9 is to inject water into the water seal tank 1 at a suitable flow rate to replenish new water for the system.

The slag discharge circulation system realizes the circulating flow of water in the water seal tank 1, and discharges all the accumulated slag to the outside of the water seal tank 1 through the circulating water to separate the slag from water, which can remove the granular and sludge-like slag in the water seal tank 1. All are removed, and the slag discharge effect is good. The system has a high degree of automation. With the help of the automatic control system and valve components, the automatic unmanned operation of the system is realized, the labor intensity is reduced, and the continuous or intermittent operation is performed according to the slag accumulation, which is convenient for maintenance.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be Modifications or equivalent replacements, without departing from the spirit and scope of the technical solution, should all be included in the scope of the claims of the present invention.

Claims (7)

1. a slag discharge circulation system, is characterized in that, comprises a water seal tank and a settling tank arranged below the water seal tank; one end of the water seal tank is provided with a slag discharge pipe, and the slag discharge pipe is inserted into the settling tank In order to discharge the slag-water mixture in the water sealing tank into the sedimentation tank; the other end of the water sealing tank is provided with a return water pipe, which is inserted into the sedimentation tank and is connected with the return water pipe by being arranged in the sedimentation tank The circulating water pump lifts the water separated from the sedimentation tank to the water seal tank. 2. The slag discharge circulation system according to claim 1, characterized in that it further comprises a water supply pipeline, which is connected to the water supply network in the plant area and points to the notch of the water seal tank, so as to replenish the water seal tank. salary. 3 . The slag discharge circulation system according to claim 1 , wherein a movable slag scraping mechanism is arranged in the water seal tank to send the accumulated slag in the water seal tank to the slag discharge pipeline. 4 . 4. The slag discharge circulation system according to claim 1, characterized in that, a water seal tank level gauge is provided in the water seal tank, and a backwater regulator is provided on the section of the return water pipe exposing the sedimentation tank valve. 5 . The slag discharge circulation system according to claim 1 , wherein the sedimentation tank is provided with a sedimentation tank liquid level gauge, and the water supply pipeline is provided with a water supply regulating valve. 6 . 6 . The slag discharge circulation system according to claim 1 , wherein a slag discharge cut-off valve is provided on the slag discharge pipeline. 7 . 7. The slag discharge circulation system according to claim 1, wherein the sedimentation tank comprises a sedimentation area and a clear water area, the slag discharge pipeline is inserted into the sedimentation area of the sedimentation tank, and the return water pipeline is inserted into the sedimentation area In the clean water area of the tank, the circulating water pump is arranged in the clean water area of the sedimentation tank.

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