Air-water mixed cooling type waste heat recovery, dust removal and slag conveying system

Abstract

An air-water mixed cooling type waste heat recovery and dust removal slag conveying system comprises a slag well, a shut-off door which is installed at the bottom of the slag well and used for opening falling slag or closing the shut-off door used for storing the slag, a slag conveyor with the top of the outer side of a horizontal section installed at the bottom of the shut-off door, and a slag crusher installed at the bottom of the lower portion of the tail end of an inclined section of the slag conveyor. The slag conveyor comprises a slag crusher, a slag bin mounted at the bottom of the slag crusher, unloading equipment mounted at the bottom of the slag bin, a dust removal system mounted at the bottom of the unloading equipment, and an air-water mixed cooling system mounted at the tail end of the inclined section of the slag conveyor. The air-water mixed cooling effect is good, slag waste heat is utilized, energy is saved, the heat exchange effect is good, the heat exchange efficiency is high, cooling air is comprehensively regulated and controlled, unloading negative pressure dust suppression is achieved, the boiler efficiency is not affected, the service life of the bag-type dust remover is long, the operation and maintenance cost is low, the atomization effect is improved, and dust fall is achieved. The method can be widely applied to the coal-fired boiler high-temperature slag treatment process, especially the coal-fired power plant boiler high-temperature slag treatment process.

Description

Technical Field

[0001] The invention relates to a wind-water mixed cooling type waste heat recovery and dust removal slag conveying system, which can be widely used in the high-temperature slag treatment process of coal-fired boilers, especially in the high-temperature slag treatment process of coal-fired power station boilers. Background Art

[0002] The existing dry slag conveying system of coal-fired power plants has the following disadvantages: (1) The existing dry slag conveying system of coal-fired power plants mainly relies on the negative pressure of the boiler to draw ambient air into the equipment through the air door of the dry slag conveyor, and conduct convective heat exchange with the high-temperature slag on the conveyor belt. Under the action of the negative pressure of the boiler, the heated hot air passes through the slag well at the bottom of the boiler and enters the furnace through the boiler slag outlet. Generally, the air volume sucked by the boiler through the negative pressure channel shall not exceed 1% of the total air intake of the boiler. However, due to the mixing of high-ash and low-quality coal in power plants, the amount of boiler slag increases, and the air volume is difficult to control, resulting in a large amount of cooling air entering the furnace, thereby affecting the thermal effect of the boiler, causing the flame in the furnace to rise, the exhaust gas temperature to increase, the exhaust gas loss to increase, and the boiler efficiency to decrease.

[0003] (2) The existing dry slag conveying system of coal-fired power plants adopts single air cooling. The negative pressure air can only cool the surface of the material, but cannot cool the inner layer of the high-temperature slag on the conveyor belt. The cooling efficiency is extremely low, resulting in poor heat exchange effect. The conveyor belt will produce thermal fatigue, which seriously affects the service life of the equipment.

[0004] (3) The existing dry slag conveying system of coal-fired power plants relies entirely on negative pressure air cooling. When the amount of boiler slag is large, in order to prevent slag accumulation at the bottom of the furnace, in addition to introducing a large amount of cooling air, the slag conveyor speed must be increased, which in turn shortens the contact time between the cooling air and the slag, resulting in poor slag residual chemical heat recovery and heat exchange. The discharged slag has a high temperature, and the high-temperature slag enters the subsequent equipment, resulting in a high failure rate of the subsequent equipment. The cooling air temperature is too low due to insufficient heat exchange, and the cooling air enters the furnace, which directly affects the boiler combustion and boiler efficiency.

[0005] (4) The existing dry slag conveying system of coal-fired power plants uses dry unloading equipment to load and transport the slag. During the loading process, a large amount of dust is often generated, which not only pollutes the surrounding environment but also affects the operating efficiency. In order to effectively suppress dust, it is required to equip the unloading with a large bag dust collector, which has high investment cost and large land occupation. Due to the high temperature of the slag, the bags are easily burned, and the operation and maintenance costs are high. Summary of the invention

[0006] The purpose of the present invention is to provide a wind-water mixed cooling type waste heat recovery and dust removal slag conveying system with good wind-water mixed cooling effect, slag waste heat utilization, energy saving, good heat exchange effect, high heat exchange efficiency, comprehensive cooling wind regulation, unloading negative pressure dust suppression, no influence on boiler efficiency, long service life of bag dust collector, low operation and maintenance cost, improved atomization effect, and dust reduction.

[0007] In order to achieve the above-mentioned purpose, the wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention includes a slag pit installed at the bottom of the coal-fired boiler, a shut-off door installed on the bottom of the slag pit for opening and dropping slag or closing the shut-off door for storing slag, a slag conveyor installed on the top of the outer side of the horizontal section on the bottom of the shut-off door, a slag crusher installed at the bottom below the end of the inclined section of the slag conveyor, a slag bin installed at the bottom of the slag crusher, a discharge device installed at the bottom of the slag bin, a dust removal system installed at the bottom of the discharge device, and a wind-water mixed cooling system installed on the end of the inclined section of the slag conveyor.

[0008] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the dust removal system includes a dust hood, a dust suction pipe installed on the top surface of the dust hood, a dust suction pipe valve installed on the dust suction pipe, an air inlet main pipe installed on the dust suction pipe valve, a dust collector connected to the end of the air inlet main pipe, an air locking feeding device installed at the bottom of the dust collector and the other end of which is connected to the inner top surface of the horizontal section of the slag conveyor, an air outlet pipe installed on the top surface of the dust collector, an induced draft fan installed at the end of the air outlet pipe, an air supply main pipe installed on the induced draft fan, two air supply branches installed on the air supply main pipe, an air supply valve installed on each air supply branch pipe, an air supply duct installed at the end of each air supply branch pipe, a blower connected to one end of each air supply duct, and an air preheater connected to the other end of each air supply duct and connected to the furnace of the coal-fired boiler through a pipeline.

[0009] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the dust collector is a bag dust collector or a cyclone separator type dust collector.

[0010] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the dust removal system is also provided with an air collection system below the air inlet main pipe, the air collection system comprises an air suction valve installed below the air inlet main pipe, one end of which is connected to the air suction valve and the other end of which is connected to the inner top surface of the horizontal section of the slag conveyor.

[0011] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the wind-water mixed cooling system includes a cooling fan installed on the top surface of the end of the inclined section of the slag conveyor, a cooling air mother pipe connected to the cooling fan, a plurality of cooling air branch pipes connected to the cooling air mother pipe at one end and connected to the top surface of the inclined section of the slag conveyor at the other end, a cooling water mother pipe for externally supplying cooling water, a cooling water valve installed on the cooling water mother pipe, a cooling water branch pipe connected to the cooling water mother pipe at one end and with a nozzle at the other end and located inside the cooling air branch pipe.

[0012] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention has a cooling wind branch pipe with an upper ring shape and a lower outlet that is flat and duck tongue-shaped.

[0013] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the slag crusher is a roller crusher, a hammer crusher or a compound crusher.

[0014] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the slag conveyor is a scale bucket type slag conveyor, a mesh belt type slag conveyor, a plate chain type slag conveyor, a hopper type slag conveyor, a crawler type slag conveyor or a scraper type slag conveyor.

[0015] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the dust suction pipe valve and the air supply valve are all automatically controlled valves, which are electric valves or pneumatic valves.

[0016] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the air suction valve is an automatic control valve, an electric valve or a pneumatic valve.

[0017] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the cooling water valve is an automatic control valve, an electric valve or a pneumatic valve.

[0018] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention has the following working principles: (1) The present invention switches the dust suction pipe valve and the air suction valve. When the dust removal system is working, the air suction valve is closed and the dust suction pipe valve is opened; when the air collection system is working, the dust suction pipe valve is closed and the air suction valve is opened.

[0019] (2) In order to realize the switching between the cooling control function and the negative pressure dust suppression function, the present invention provides an air suction valve between the air hood and the air inlet main pipe, and a dust suction pipe valve between the dust suction pipe and the air inlet main pipe. When the air suction valve is closed and the dust suction pipe valve is opened, the negative pressure dust suppression function is realized; when the air suction valve is opened and the dust suction pipe valve is closed, the cooling air control function is realized.

[0020] (3) The present invention adopts an air collection system, and an air suction valve is arranged between the air collection hood and the air inlet main pipe. The air volume control, start-up or disconnection of the air collection circuit of the cooling air recovery function are realized by opening or closing the air suction valve. The uncontrollable air leakage of the hot air or slag conveyor shell can be intercepted and led out at the air collection hood, avoiding the cooling air or uncontrollable air leakage from entering the furnace and affecting the boiler efficiency, thereby achieving the purpose of comprehensive cooling air control.

[0021] (4) The present invention adopts a dust removal system. The two air supply branches of the present invention form a dual path, which is switched by the air supply valve of each path. The two paths can be operated simultaneously or switched. The air supply switching of the air supply branches is realized by opening and closing the two air supply valves.

[0022] The hot air formed by the cooling air of the present invention after heat exchange with the high-temperature slag of the slag conveyor passes through the air collecting hood and the air inlet main pipe to enter the dust collector for dust removal, and the dust collected by the dust collector is discharged into the slag conveyor by the air lock feeding device below. The purified hot air is transported to the air supply duct through the induced draft fan through the air supply main pipe and the air supply branch pipe. After the purified hot air is mixed with the air supplied by the blower in the air supply duct, it enters the air preheater for heating and then enters the furnace of the coal-fired boiler. The purified hot air plays a role in boiler combustion. Therefore, the waste heat of the hot air is utilized and energy saving is achieved.

[0023] (5) The present invention adopts a wind-water mixed cooling system, which integrates cooling slag and slag conveying, and completes conveying while the slag is wind-water cooled. On the one hand, the cooling fan blows the cooling air into the cooling air main pipe, and then sprays it onto the slag of the slag conveyor through the cooling air branch pipe; on the other hand, spray water is set synchronously, and the cooling water enters the cooling water branch pipe through the cooling water main pipe. The cooling water branch pipe is placed in the cooling air branch pipe, and the spray water is mixed with the cooling air. After the cooling air and cooling water are mixed, aerosol is formed. The airflow is accelerated through the duck tongue mouth and becomes smaller droplets. It enters the slag conveyor casing and exchanges heat with the high-temperature slag on the conveyor belt. The slag temperature is reduced and the wind temperature is increased, thereby recovering the sensible heat of the slag and the residual chemical heat, achieving the purpose of hot air waste heat recovery.

[0024] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention has a countercurrent mist formed by the mixing of slag and wind-water, which is fully and directly contacted for heat exchange. The slag temperature is greatly reduced, and the temperature entering the dust collector is very low. Even if a bag dust collector is used, the bag will not burn out. The bag dust collector has a long service life and low operation and maintenance costs.

[0025] The cooling air branch pipe of the present invention adopts a duck tongue structure with a thick upper part and a thin lower part, the upper part is in a ring shape, and the lower outlet is flat and duck tongue-shaped. The structure adopts a process of flattening one end of a round tube, the purpose of which is to accelerate the airflow after passing through the cooling air branch pipe. The high-speed airflow has stronger penetration, can make the slag layer cool to a greater depth, can quickly cool down the high-temperature slag, and achieve a better cooling effect. Therefore, the wind and water mixed airflow will be accelerated when passing through the duck tongue, which is easy to directly blow the high-temperature slag on the conveyor belt of the slag conveyor, and the wind and water mixed cooling effect is good.

[0026] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention adopts a wind-water mixed cooling structure to mix wind and water together. The present invention not only increases the speed of cooling water passing through, but also has a certain guiding effect on the cooling wind, so that the cooling wind can contact the accelerated cooling water along the duck tongue mouth of the cooling air branch pipe. Since the water flow speed is relatively large, the cooling wind can fully contact the cooling water, and the wind and water are fully mixed, thereby improving the atomization degree, thereby improving the atomization effect, forming aerosol to cool the slag, and solving the problem of poor cooling effect of air cooling alone.

[0027] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention adopts a wind-water mixed cooling system to cool the slag through a mixed medium of air and water. The conveying direction of the slag inside the slag conveyor is opposite to the flow direction of the wind-water mixed mist. The cooling medium and the high-temperature slag are fully and directly contacted for heat exchange, and the residual chemical heat of the slag is effectively recovered. Therefore, the cooling air and cooling water have a strong heat exchange with the slag, and the cooling effect is good. The cooling capacity is strong, the waste heat of the high-temperature slag is recovered, the waste heat of the slag is utilized, energy is saved, the heat exchange efficiency is high, and the heat exchange effect is good. In addition, the failure of the equipment caused by long-term high-temperature operation is reduced, and no low-temperature cooling air enters the furnace, which will not affect the combustion of the boiler.

[0028] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention adopts an air collecting system. The hot air or uncontrollable air leakage of the slag conveyor shell can be intercepted and led out at the air collecting hood, avoiding cooling air or uncontrollable air leakage from entering the furnace and affecting the boiler efficiency, thereby achieving the purpose of comprehensive cooling air regulation.

[0029] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention has the function of negative dust suppression. A dust collecting hood is arranged around the discharge port of the unloading equipment, which is connected with the air inlet main pipe through a dust suction pipe. The dust suction pipe is provided with a dust suction pipe valve. The dust suction pipe valve is normally closed and is only opened during unloading. The characteristics of large air volume and high negative pressure of the induced draft fan are utilized to effectively suppress dust in the unloading area, and the dust-containing air is sucked into the dust collector for dust removal, thereby achieving the purpose of negative dust suppression during unloading.

[0030] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention exchanges heat with the cooling air entering the slag conveyor housing, and then sends the hot air after heat exchange into the boiler air supply system as the air required for fuel combustion, thereby assisting combustion, utilizing the waste heat of the hot air, and saving energy. Moreover, the air volume sucked in by the boiler negative pressure is zero, and the exhaust gas temperature remains unchanged, so the boiler efficiency is not affected.

[0031] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention adopts a dust removal system, and dust particles enter the dust collector through a dust collecting hood, a dust suction pipe, and an air inlet main pipe for dust removal, purification, and dust reduction.

[0032] In summary, the wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention has good wind-water mixed cooling effect, utilizes slag waste heat, saves energy, has good heat exchange effect, has high heat exchange efficiency, comprehensively controls cooling air, negatively suppresses dust during unloading, and does not affect boiler efficiency. The bag dust collector has a long service life, low operation and maintenance costs, and improves atomization effect and dust reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings and embodiments thereof.

[0034] Figure 1 is a system diagram of the present invention; Figure 2 yes Figure 1 A local enlarged view of point I in the figure; Figure 3 yes Figure 2 Left view of the cooling air branch pipe in; Figure 4 yes Figure 3 Schematic diagram of the three-dimensional structure of the cooling air branch pipe. DETAILED DESCRIPTION

[0035] exist Figure 1 to Figure 4 In the embodiment of the present invention, the wind-water mixed cooling type waste heat recovery and dust removal slag conveying system comprises a slag pit 2 installed at the bottom of a coal-fired boiler 1, a shut-off door 3 installed at the bottom of the slag pit and used to open and drop slag or close and store slag, a slag conveyor 4 installed at the top of the outer side of the horizontal section at the bottom of the shut-off door, a slag crusher 5 installed at the bottom below the end of the inclined section of the slag conveyor, a slag bin 6 installed at the bottom of the slag crusher, a discharge device 7 installed at the bottom of the slag bin, a dust removal system installed at the bottom of the discharge device, and a wind-water mixed cooling system installed at the end of the inclined section of the slag conveyor.

[0036] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention comprises a dust collecting hood 8, a dust suction pipe 9 installed on the top surface of the dust collecting hood, a dust suction pipe valve 10 installed on the dust suction pipe, an air inlet main pipe 11 installed on the dust suction pipe valve, a dust collector 12 connected to the end of the air inlet main pipe, an air locking feeding device 13 with one section installed at the bottom of the dust collector and the other end connected to the inner top surface of the horizontal section of the slag conveyor, an air outlet pipe 14 installed on the top surface of the dust collector, an induced draft fan 15 installed on the end of the air outlet pipe, an air supply main pipe 16 installed on the induced draft fan, two air supply branches 17 installed on the air supply main pipe, an air supply valve 18 installed on each air supply branch pipe, an air supply duct 19 installed on the end of each air supply branch pipe, a blower 20 connected to one end of each air supply duct, and an air preheater 21 connected to the other end of each air supply duct and connected to the furnace of the coal-fired boiler through a pipeline.

[0037] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the dust collector is a bag dust collector or a cyclone separator type dust collector.

[0038] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the dust removal system is also provided with an air collection system below the air inlet main pipe, the air collection system comprises an air suction valve 22 installed below the air inlet main pipe, an air collecting hood 23 having one end connected to the air suction valve and the other end connected to the inner top surface of the horizontal section of the slag conveyor.

[0039] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the wind-water mixed cooling system includes a cooling fan 24 installed on the top surface of the end of the inclined section of the slag conveyor, a cooling air mother pipe 25 connected to the cooling fan, a plurality of cooling air branch pipes 26 connected to the cooling air mother pipe at one end and connected to the top surface of the inclined section of the slag conveyor at the other end, a cooling water mother pipe 27 for externally supplying cooling water, a cooling water valve 28 installed on the cooling water mother pipe, and a cooling water branch pipe 29 connected to the cooling water mother pipe at one end and with a nozzle 30 at the other end and located inside the cooling air branch pipe.

[0040] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention has a cooling wind branch pipe with an upper ring shape and a lower outlet that is flat and duck tongue-shaped.

[0041] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the slag crusher is a roller crusher, a hammer crusher or a compound crusher.

[0042] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the slag conveyor is a scale bucket type slag conveyor, a mesh belt type slag conveyor, a plate chain type slag conveyor, a hopper type slag conveyor, a crawler type slag conveyor or a scraper type slag conveyor.

[0043] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the dust suction pipe valve and the air supply valve are all automatically controlled valves, which are electric valves or pneumatic valves.

[0044] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the air suction valve is an automatic control valve, an electric valve or a pneumatic valve.

[0045] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention, the cooling water valve is an automatic control valve, an electric valve or a pneumatic valve.

[0046] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention is Figure 1 In the figure, the cooling mist flows in direction a, the slag is conveyed in direction b, and the dust is collected in direction c; Figure 2 In the middle, the jet-like mist is formed by the mixture of wind and water.

[0047] The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system of the present invention is only described above as a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes by using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A wind-water mixed cooling type waste heat recovery and dust removal slag conveying system, characterized in that: It includes a slag pit installed at the bottom of the coal-fired boiler, a shut-off door installed at the bottom of the slag pit and used to open and drop slag or close for storing slag, a slag conveyor installed at the top of the outer side of the horizontal section at the bottom of the shut-off door, a slag crusher installed at the bottom below the end of the inclined section of the slag conveyor, a slag bin installed at the bottom of the slag crusher, a unloading device installed at the bottom of the slag bin, a dust removal system installed at the bottom of the unloading device, and a wind-water mixed cooling system installed at the end of the inclined section of the slag conveyor.

2. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 1 is characterized in that: The dust removal system comprises a dust hood, a dust suction pipe installed on the top surface of the dust hood, a dust suction pipe valve installed on the dust suction pipe, an air inlet main pipe installed on the dust suction pipe valve, a dust collector connected to the end of the air inlet main pipe, an air locking feeding device installed at the bottom of the dust collector and the other end of which is connected to the inner top surface of the horizontal section of the slag conveyor, an air outlet pipe installed on the top surface of the dust collector, an induced draft fan installed at the end of the air outlet pipe, an air supply main pipe installed on the induced draft fan, two air supply branches installed on the air supply main pipe, an air supply valve installed on each air supply branch pipe, an air supply duct installed at the end of each air supply branch pipe, a blower connected to one end of each air supply duct, and an air preheater connected to the other end of each air supply duct and connected to the furnace of a coal-fired boiler through a pipe.

3. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 2 is characterized in that: The dust collector is a bag dust collector or a cyclone separator type dust collector.

4. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 2 is characterized in that: An air collecting system is also provided below the main air inlet pipe of the dust removal system. The air collecting system includes an air suction valve installed below the main air inlet pipe, an air collecting hood having one end connected to the air suction valve and the other end connected to the inner top surface of the horizontal section of the slag conveyor.

5. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 1 is characterized in that: The wind-water mixed cooling system includes a cooling fan installed on the top surface of the end of the inclined section of the slag conveyor, a cooling air main pipe connected to the cooling fan, a plurality of cooling air branch pipes connected to the cooling air main pipe at one end and connected to the top surface of the inclined section of the slag conveyor at the other end, a cooling water main pipe for externally supplying cooling water, a cooling water valve installed on the cooling water main pipe, and a cooling water branch pipe connected to the cooling water main pipe at one end and having a nozzle at the other end and located inside the cooling air branch pipe.

6. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 5 is characterized in that: The cooling air branch pipe has a ring-shaped upper portion and a flat duck-tongue-shaped lower outlet.

7. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 1 is characterized in that: The slag crusher is a roller crusher, a hammer crusher or a compound crusher.

8. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 1 is characterized in that: The slag conveyor is a scale bucket type slag conveyor, a mesh belt type slag conveyor, a plate chain type slag conveyor, a hopper type slag conveyor, a crawler type slag conveyor or a scraper type slag conveyor.

9. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 2 is characterized in that: The dust suction pipe valve and air supply valve are all automatically controlled valves, which are electric valves or pneumatic valves.

10. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 4, characterized in that: The air suction valve is an automatic control valve, an electric valve or a pneumatic valve.

11. The wind-water mixed cooling type waste heat recovery and dust removal slag conveying system according to claim 5, characterized in that: The cooling water valve is an automatic control valve, an electric valve or a pneumatic valve.

Images