Water quenching slag salvaging machine for liquid slag discharge

Abstract

The utility model provides a water quenching slag salvaging machine for liquid slag discharge, which comprises a slag salvaging machine main body, a hydraulic conveying system arranged at a feed port of the slag salvaging machine main body, a spraying pipeline arranged below the conveying system and used for fragmenting liquid slag into uniform size, and a dead steam discharge system arranged above the slag salvaging machine main body, a scraper slag salvaging device used for collecting salvaged slag is arranged in the slag salvaging machine body, and a double-turning-plate air locking discharging valve is arranged at a discharging port of the slag salvaging machine body. Belongs to the technical field of thermal engineering. The operation is stable and safe, the spraying pipeline is used for decomposing and salvaging the slag, and the problems of equipment failure caused by non-uniform granularity of the slag when the amount of the liquid slag is unstable and noise and steam generated when the liquid slag enters the slag salvaging machine are solved; a dead steam discharge system and a slag quenching water circulation system are used, so that the problem of heat exchange and scaling of circulating water in the slag conveyor is solved; the problem that liquid slag is caked on the chain is solved.

Description

Technical Field

[0001] The utility model relates to a water quenching slag scooping machine used for liquid slag discharge, belonging to the technical field of thermal energy engineering. Background Art

[0002] The slag scooping machine for liquid slag discharge furnace is a kind of equipment used to process the liquid slag of boiler or melting furnace, which is mainly composed of water quenching tank and slag scooping device, and the slag scooping device is arranged in the water quenching tank.

[0003] The principle of the slag scooping machine for liquid slag discharge furnace is to use the cooling effect of water to quickly cool the liquid slag into solid particles, and then use the slag scooping device to scoop it out of the water quenching tank and transport it to the designated place.

[0004] The application fields of liquid slag furnace slag remover equipment mainly include metal smelting, power plants, cement plants, etc. Among them, the liquid slag remover in metal smelting is mainly used to treat the roasted ore of laterite nickel ore, copper ore, etc. The liquid slag remover in power plants is mainly used to treat the slag of coal-fired boilers. The liquid slag remover in cement plants is mainly used to treat the slag of cement kilns. The liquid slag of solid waste melting furnace is mainly used to treat solid waste after melting.

[0005] The current problems of slag removal equipment for liquid slag removal furnace mainly include the following aspects:

[0006] 1. The operation of the slag scooping machine of the liquid slag discharge furnace is prone to stop or trip due to overcurrent, jamming, chain clamping, chain debonding, chain breaking, chain jumping, etc. due to the unstable slag discharge of the upstream equipment, which causes the water quenching slag to have different sizes.

[0007] 2. The circulating water of the slag remover of the liquid slag discharge furnace is sewage, and the heat exchanger is prone to scaling, which affects the heat exchange effect and requires frequent maintenance.

[0008] 3. The upper return chain of the slag scoop machine of the liquid slag discharge furnace is located shallowly in the slag water. When the slag flow rate suddenly increases, it is easy to clump on the chain, causing chain jamming or bearing damage.

[0009] 4. The water tank of the slag remover of the liquid slag discharge furnace is an open space. When the liquid slag falls, it will generate very loud noise and steam. The steam is emitted in the workshop, which will increase the humidity of the workshop and affect the safe operation of high-voltage electrical equipment such as electric arc furnaces.

[0010] Therefore, there is an urgent need in the art for a water quenching slag dredger structure with stable and safe operation for liquid slag discharge. Summary of the invention

[0011] The utility model aims to solve the problems of unstable operation and high energy consumption of a slag scooping machine for a liquid slag discharge furnace in the prior art.

[0012] In order to achieve the purpose of solving the above-mentioned problems, the technical solution adopted by the utility model is to provide a water quenching slag scoop machine for liquid slag discharge, including a slag scoop machine main body, a hydraulic conveying system is provided at the feeding port of the slag scoop machine main body, a spray pipeline for crushing the liquid slag into uniform sizes is provided below the hydraulic conveying system, a waste steam discharge system is provided above the slag scoop machine main body, a scraper slag scoop device for collecting slag is provided inside the slag scoop machine main body, and a double-flap air-locking unloading valve is provided at the discharge port of the slag scoop machine main body.

[0013] Preferably, the hydraulic conveying system comprises a hydraulic conveying chute arranged above the slag scoop body.

[0014] Preferably, the exhaust steam discharge system is connected to the slag quenching water circulation system to recycle the condensed water used for spraying.

[0015] Preferably, the slag quenching water circulation system comprises a circulating water pipeline arranged above the slag scoop machine body and connected to the hydraulic conveying chute, and the condensed water used for spraying is circulated through the slag scoop machine water circulation pump and valve.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Use spray pipeline to decompose slag, which solves the problem of equipment failure caused by uneven slag particle size when the amount of liquid slag is unstable, and the noise and steam caused by liquid slag entering the slag remover;

[0018] 2. The exhaust steam discharge system and slag quenching water circulation system are used to solve the scaling problem of circulating water heat exchange in the slag scooper;

[0019] 3. A hydraulic chute is set before entering the slag collecting area of ​​the slag collecting machine chain, which can quickly crush and cool the liquid slag, solving the problem of liquid slag agglomeration on the chain; BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the water quenching slag remover used for liquid slag removal in the utility model;

[0021] Figure numerals: 1. Cooling and noise reduction spray port; 2. Hydraulic conveying chute; 3. Exhaust steam conveying fan; 4. Exhaust steam cooling tower; 5. Exhaust steam condensate pipeline; 6. Slag scoop machine water circulation pump; 7. Valve; 8. Circulating water pipeline; 9. Slag scoop machine body; 10. Scraper slag scoop device; 11. Double flap air lock unloading valve. DETAILED DESCRIPTION

[0022] In order to make the present invention more clearly understood, a preferred embodiment is described in detail with reference to the accompanying drawings as follows:

[0023] like Figure 1As shown, the utility model provides a water quenching slag scooping machine for liquid slag discharge. The liquid slag discharge falls into the spraying area of ​​the hydraulic chute through the flow channel by gravity, and is initially cooled by the spray water sprayed from the cooling noise reduction spray port 1. Since the temperature difference between the spray water and the liquid slag discharge is very large, and the spray water pressure is greater than 1Mpa, the liquid slag discharge will be broken and solidified into small particles less than 5mm in a very short time and fall into the bottom of the hydraulic conveying chute 2. Another function of the spray is to separate the liquid slag discharge from the liquid slag discharge through the high-speed granular water flow. Contact, to avoid the melt falling into the water to generate a large number of bubbles and bursting to produce huge noise, small solid particles are flushed into the slag machine body 9 by the flushing nozzle at the bottom of the hydraulic conveying chute 2, in the slag machine body, the heat of the small particles will continue to transfer from the inside to the water in the slag machine, the heat makes the water in the shell generate water vapor, the steam is extracted by the exhaust steam conveying fan 3, sent to the exhaust steam cooling tower 4 and the plant area circulating cooling water heat exchange cooling, the condensed water returns to the slag machine body 9 by gravity through the exhaust steam condensate pipe 5. The exhaust steam exhaust system will also maintain negative pressure at the spray inlet of the hydraulic chute to prevent water vapor from overflowing into the workshop. The cooled small slag particles will be scraped by the scraper slag removal device 10 and slowly transported to the equipment outlet. During the transportation process, most of the surface water of the small slag particles will flow back into the slag removal machine due to gravity. A double-flap air-locking discharge valve 11 is provided at the equipment outlet. The valve has a relatively closed effect by intermittently opening two doors in order to maintain the negative pressure in the slag removal machine casing and at the hydraulic chute spray inlet. The condensed water used for spraying is circulated through the slag removal machine water circulation pump 6, valve 7, and circulating water pipeline 8.

[0024] The above is only a preferred embodiment of the utility model, and is not any formal or substantial limitation of the utility model. It should be pointed out that ordinary technicians in this technical field can make some improvements and supplements without departing from the utility model, and these improvements and supplements should also be regarded as the protection scope of the utility model. Any technician familiar with this profession can make some changes, modifications and equivalent changes made by using the technical content disclosed above without departing from the spirit and scope of the utility model, which are all equivalent embodiments of the utility model; at the same time, any changes, modifications and evolutions of any equivalent changes made to the above embodiments based on the essential technology of the utility model are still within the scope of the technical solution of the utility model.

Claims

1. A water quenching slag remover for liquid slag removal, characterized in that: It includes a slag scoop machine body. A hydraulic conveying system is provided at the feeding port of the slag scoop machine body. A spray pipeline for breaking the liquid slag into uniform sizes is provided below the hydraulic conveying system. A waste steam discharge system is provided above the slag scoop machine body. A scraper slag scoop device for collecting slag is provided inside the slag scoop machine body. A double-flap air-locking unloading valve is provided at the discharging port of the slag scoop machine body.

2. The water quenching slag remover for liquid slag removal according to claim 1, characterized in that: The hydraulic conveying system comprises a hydraulic conveying chute arranged above the slag scooping machine body.

3. The water quenching slag remover for liquid slag removal according to claim 2, characterized in that: The exhaust steam discharge system is connected to the slag quenching water circulation system to circulate the condensed water used for spraying.

4. The water quenching slag remover for liquid slag removal according to claim 3, characterized in that: The slag quenching water circulation system comprises a circulating water pipeline arranged above the slag scoop machine body and connected to the hydraulic conveying chute, and condensed water for spraying is circulated through the slag scoop machine water circulation pump and valve.

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