A dry coke quenching device for semi coke

Abstract

The utility model discloses a kind of semi coke dry quenching device, including sealed bunker, the top of sealed bunker is connected with several water-cooled wall, water-cooled wall export is communicated with sealed bunker, still be connected with upper coke supporting disc in sealed bunker, upper coke supporting disc is located below water-cooled wall export, still be connected with upper layer coke pushing frame in sealed bunker above upper coke supporting disc, humidification system is connected in sealed bunker below upper coke supporting disc;Sealed bunker lower end is connected with closed conveyor, sealed bunker is communicated with closed conveyor, the lower end export below sealed bunker of closed conveyor top is provided with lower coke supporting disc, lower layer coke pushing frame is connected in closed conveyor above lower coke supporting disc;Through the double-valve gas lock control system of intermediate bin and coke discharge bin, upper discharge valve and lower discharge valve staggered opening and closing, effectively prevent gas overflow when discharging coke, ensure operation safety.

Description

Technical Field

[0001] This utility model belongs to the field of deep coal processing, specifically relating to a dry quenching device for semi-coke. Background Technology

[0002] Semi-coke, also known as semi-coke, is a low-sulfur, low-ash, high-calorific-value solid carbonaceous product obtained by dry distillation of low-rank coals such as peat, lignite, and high-volatile bituminous coal under medium- and low-temperature conditions. Semi-coke is widely used in chemical, metallurgical, power, heating, domestic coal briquettes, wastewater treatment, and electrode material preparation fields. In the production process of semi-coke, the high-temperature semi-coke needs to be cooled to a temperature suitable for transportation and storage. The cooling process of red-hot coke is usually called quenching, through which the semi-coke is cooled to below 150℃. With the adjustment of semi-coke industry policies, the quenching method has shifted from traditional wet quenching to low-moisture quenching and then to dry quenching, overcoming the shortcomings of traditional wet coking processes, such as resource waste, environmental pollution, and poor semi-coke quality.

[0003] However, existing dry quenching technologies still have many problems: First, the existing technology results in high moisture content in the semi-coke and unstable product quality. For example, the final temperature of the method described in CN103965922A still reaches 170-210℃, failing to achieve deep cooling. Second, the existing technology has low effective gas composition in the raw coal gas, and the waste heat of the semi-coke is not effectively recovered and utilized, resulting in serious energy waste. Third, the existing technology causes significant environmental pollution and poses safety hazards, lacking effective sealing measures to prevent gas leakage. Finally, the existing technology lacks a systematic segmented processing technology, making it impossible to achieve precise temperature control and efficient material conveying. Therefore, there is an urgent need to develop a new dry quenching process and device to solve the above-mentioned technical problems. Utility Model Content

[0004] This utility model discloses a dry quenching device for semi-coke, which realizes waste heat recovery, segmented coke pushing and quenching, and prevents gas leakage.

[0005] The purpose of this utility model is achieved through the following technical means: a dry quenching device for semi-coke includes a sealed silo, a number of water-cooled walls connected to the top of the sealed silo, the outlet of the water-cooled walls being connected to the sealed silo, an upper coke support plate connected inside the sealed silo, the upper coke support plate being located below the outlet of the water-cooled walls, an upper coke pusher frame connected inside the sealed silo above the upper coke support plate, and a humidity control system connected inside the sealed silo below the upper coke support plate. The sealed silo is connected to a sealed conveyor at its lower end. The sealed silo is connected to the sealed conveyor. A lower coke support plate is installed on the top of the sealed conveyor below the lower outlet of the sealed silo. A lower coke pusher frame is connected inside the sealed conveyor above the lower coke support plate. The closed conveyor is connected to an intermediate silo and a coke outlet silo from top to bottom at the tail end outlet. The top inlet of the intermediate silo is connected to the tail end outlet of the closed conveyor. The plurality of water-cooled walls are equidistantly and detachably connected to the upper part of the sealed silo.

[0006] Expansion joints are connected to both the upper and lower ends of the water-cooled wall.

[0007] The lower outlet of the intermediate silo is connected to an upper discharge valve, and the lower outlet of the coke outlet is connected to a lower discharge valve.

[0008] The humidity control system consists of spray heads, which are connected to an external water source via pipes.

[0009] Both the lower and upper coke pusher frames are connected to coke pushers, which are connected to the lower and upper coke pusher frames via connecting rods to drive the lower and upper coke pusher frames to reciprocate.

[0010] The closed conveyor is also equipped with a vent hole and an explosion-proof hole at its tail end outlet. A vent valve is connected to the vent hole, and an explosion-proof valve is connected to the explosion-proof hole.

[0011] The coke outlet has multiple outlets at its lower end, and the discharge valve is detachably connected to the coke outlet.

[0012] The beneficial effects of this utility model are as follows: 1. Significant waste heat recovery effect: Through the membrane water-cooled wall waste heat recovery system, the sensible heat of semi-coke is effectively utilized to generate saturated steam, realizing the secondary utilization of energy and saving energy costs.

[0013] 2. Precise temperature control: It adopts a segmented cooling process. First, the temperature of the semi-coke is reduced from 500-650℃ to below 250℃ through a membrane water-cooled wall. Then, the temperature is further reduced to below 80℃ through a humidity control system. Compared with the existing technology with a final temperature of 200-250℃, the temperature control is more precise and the cooling effect is better.

[0014] 3. Excellent environmental performance: It adopts sealed silos and closed conveyors, and all connections are sealed, which effectively solves the problem of gas dispersion during coke quenching, prevents gas leakage, and reduces environmental pollution and safety hazards.

[0015] 4. Improved safety performance: The dual-valve air-lock control system in the intermediate silo and coke discharge silo allows the upper and lower discharge valves to open and close alternately, effectively preventing gas overflow during coke discharge and ensuring operational safety.

[0016] 5. It is highly flexible in operation. The pushing speed of the upper and lower coke pusher frames can be adjusted according to the half coke volume to adapt to different working conditions. The equipment adopts a detachable connection design, which is convenient for maintenance and repair. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of a dry quenching device for semi-coke. Figure 2 for Figure 1 Enlarged schematic diagram of the structure at point A in the middle; In the diagram: 1. Water-cooled wall; 2. Upper coke pusher frame; 3. Upper coke tray; 4. Spray head; 5. Sealed hopper; 7. Lower coke pusher frame; 8. Lower coke tray; 9. Sealed conveyor; 10. Intermediate hopper; 11. Upper discharge valve; 12. Coke outlet hopper; 13. Lower discharge valve. The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0018] like Figure 1 and Figure 2 As shown, a dry quenching device for semi-coke includes a sealed silo 5, a plurality of water-cooled walls 1 connected to the top of the sealed silo 5, the outlet of the water-cooled walls 1 being connected to the sealed silo 5, an upper coke support plate 3 connected inside the sealed silo 5, the upper coke support plate 3 being located below the outlet of the water-cooled walls 1, an upper coke pusher frame 2 connected inside the sealed silo 5 above the upper coke support plate 3, and a humidity control system 4 connected inside the sealed silo 5 below the upper coke support plate 3. The sealed silo 5 is connected to a sealed conveyor 8 at its lower end. The sealed silo 5 is connected to the sealed conveyor 8. The top of the sealed conveyor 8 is equipped with a lower coke support plate 7 located below the lower outlet of the sealed silo 5. The sealed conveyor 8 above the lower coke support plate 7 is connected to a lower coke pusher frame 6. The closed conveyor 8 is connected to the intermediate silo 9 and the coke outlet 11 from top to bottom at the tail end outlet. The top inlet of the intermediate silo 9 is connected to the tail end outlet of the closed conveyor 8. The lower outlet of the intermediate silo 9 is connected to an upper discharge valve 10, and the lower outlet of the coke outlet 11 is connected to a lower discharge valve 12.

[0019] The water-cooled wall 1 cools down the incoming semi-coke. After cooling, it falls onto the upper coke tray 3 in the sealed silo 5. Under the reciprocating motion of the upper coke pusher frame 2, the semi-coke on the upper coke tray 3 is pushed into the sealed silo 5 below the upper coke tray 3. When falling, it is further cooled by the water mist sprayed by the humidity control system 4. Finally, the semi-coke falls onto the lower coke tray 7 of the enclosed conveyor 8. The lower coke pusher frame 6 pushes the semi-coke on the lower coke tray 7 onto the conveyor belt of the enclosed conveyor 8, and the conveyor belt transports it to the intermediate silo 9. The upper discharge valve 10 is opened and the lower discharge valve 12 is closed, and the semi-coke falls into the coke discharge silo 11. The upper discharge valve 10 is closed and the lower discharge valve 12 is opened, and the semi-coke leaves the coke discharge silo 11 to enter the next process, completing the dry quenching process. By opening the two discharge valves alternately, gas lock coke discharge is achieved, which effectively prevents gas from overflowing during coke discharge and ensures operational safety.

[0020] The sealed hopper 5 below the upper coke tray 3 has a cone-shaped structure, which facilitates the falling of semi-coke. At the same time, as the lower part becomes narrower, the semi-coke accumulated on the lower coke tray 7 can block the bottom opening of the sealed hopper 5, forming a material seal.

[0021] The upper coke tray 3 is fixed at both ends to the inner side walls of the upper part of the sealed hopper 5; the lower coke tray 7 is fixed at both ends to the inner side walls of the horizontal trough of the sealed conveyor 8.

[0022] The upper coke pusher frame 2 is cooled by circulating water, which reduces the temperature of the upper coke tray 3 and the upper coke pusher frame 2, preventing high temperature from affecting the sealing effect.

[0023] The connections between the water-cooled wall 1 and the sealed silo 5, and between the sealed silo 5 and the sealed conveyor 8, are all sealed by welding or other means to prevent gas from escaping.

[0024] The plurality of water-cooled walls 1 are equidistantly and detachably connected to the upper part of the sealed silo 5.

[0025] The detachable connection allows for the removal or installation of a new water-cooled wall 1 based on the scale of the previous process, i.e., the amount of semi-coke to be processed. The water-cooled wall 1 is a membrane water-cooled wall.

[0026] Expansion joints are connected to both the upper and lower ends of the water-cooled wall 1. Because the temperature of semi-coke is relatively high, expansion joints are installed at the connection points between the upper and lower ends of the water-cooled wall 1 and other structures to absorb the thermal displacement caused by temperature changes.

[0027] The humidity control system 4 is a spray head, which is connected to an external water source through a pipe.

[0028] The spray head 4 is installed in the sealed hopper 5 below the upper coke tray 3 to further cool down the pushed semi-coke. The spray head 4 is connected to the external water supply equipment through a pipe.

[0029] Both the lower coke pusher frame 6 and the upper coke pusher frame 2 are connected to coke pushers. The coke pushers are connected to the lower coke pusher frame 6 and the upper coke pusher frame 2 via connecting rods, and are used to drive the lower coke pusher frame 6 and the upper coke pusher frame 2 to reciprocate. The lower coke pusher frame 6 and the upper coke pusher frame 2 are both frame parts of existing coke pushers.

[0030] Both the lower coke pusher frame 6 and the upper coke pusher frame 2 are reciprocated by a coke pusher.

[0031] The drive end of the coke pusher is hinged with a connecting rod, and the other end of the connecting rod is hinged to the lower coke pusher frame 6 and the upper coke pusher frame 2.

[0032] The tail end outlet of the sealed conveyor 8 is also provided with a vent hole and an explosion-proof hole. A vent valve is connected to the vent hole, and an explosion-proof valve is connected to the explosion-proof hole.

[0033] The enclosed conveyor 8 has open vents and explosion-proof holes, and is equipped with corresponding valves for manual control of venting.

[0034] The coke outlet 11 has multiple outlets at its lower end, and the discharge valve 12 is detachably connected to the outlet of the coke outlet 11.

[0035] Both the enclosed conveyor 8 and the coke outlet 11 have manholes for maintenance.

[0036] In practical use, the motor frequency of the upper coke pusher frame 2 and the lower coke pusher frame 6 can be adjusted according to the operation of the carbonization furnace, thereby changing the coke discharge volume to meet the different coke discharge requirements of the carbonization furnace and achieving energy-saving effect.

[0037] For example, when the sealed silo 5 stores the preset amount of semi-coke, the pushing speed of the lower coke pusher frame 6 can be adjusted to discharge the semi-coke to the sealed conveyor 8, thereby reducing the moisture content of the semi-coke by 60-65%, increasing the calorific value by 15-25%, and generating steam through waste heat recovery. Each ton of semi-coke can generate 0.1-0.3 tons of steam, and the amount of gas leakage is reduced by more than 90%.

Claims

1. A dry quenching device for semi-coke, characterized in that: It includes a sealed silo (5), the top of which is connected to several water-cooled walls (1), the outlet of the water-cooled walls (1) is connected to the sealed silo (5), and the sealed silo (5) is also connected to an upper coke support plate (3), which is located below the outlet of the water-cooled walls (1). The sealed silo (5) above the upper coke support plate (3) is also connected to an upper coke pusher frame (2), and the sealed silo (5) below the upper coke support plate (3) is connected to a humidity control system (4). The sealed silo (5) is connected to a sealed conveyor (8) at its lower end. The sealed silo (5) is connected to the sealed conveyor (8). The sealed conveyor (8) is equipped with a lower coke tray (7) located below the lower outlet of the sealed silo (5). The sealed conveyor (8) above the lower coke tray (7) is connected to a lower coke pusher frame (6). The closed conveyor (8) is connected from top to bottom to the intermediate silo (9) and the coke outlet silo (11). The top inlet of the intermediate silo (9) is connected to the tail outlet of the closed conveyor (8).

2. The dry quenching device for semi-coke according to claim 1, characterized in that: The plurality of water-cooled walls (1) are equidistantly and detachably connected to the upper part of the sealed silo (5).

3. A dry quenching device for semi-coke according to claim 1 or 2, characterized in that: The water-cooled wall (1) is connected to expansion joints at both the upper and lower ends.

4. The dry quenching device for semi-coke according to claim 1, characterized in that: The intermediate silo (9) is connected to an upper discharge valve (10) at its lower outlet, and the coke outlet silo (11) is connected to a lower discharge valve (12) at its lower outlet.

5. The dry quenching device for semi-coke according to claim 1, characterized in that: The humidity control system (4) is a spray head, which is connected to an external water source through a pipe.

6. The dry quenching device for semi-coke according to claim 1, characterized in that: Both the lower coke pusher frame (6) and the upper coke pusher frame (2) are connected to coke pushers. The coke pushers are connected to the lower coke pusher frame (6) and the upper coke pusher frame (2) via connecting rods, and are used to drive the lower coke pusher frame (6) and the upper coke pusher frame (2) to reciprocate.

7. The dry quenching device for semi-coke according to claim 1, characterized in that: The closed conveyor (8) also has a vent hole and an explosion-proof hole at its tail end outlet. A vent valve is connected to the vent hole, and an explosion-proof valve is connected to the explosion-proof hole.

8. A dry quenching device for semi-coke according to claim 4, characterized in that: The coke outlet (11) has multiple outlets at its lower end, and the discharge valve (12) is detachably connected to the outlet of the coke outlet (11).

Images