Coke oven head and tail coke cooling treatment system

Abstract

The utility model relates to a coke oven head and tail coke cooling treatment system which comprises a head and tail coke collecting chute, a liquid-cooled cooler, a heat conduction oil tank, a machine side water seal type dust removal dry pipe, a dense-phase pump and a head and tail coke collecting hopper, the head and tail coke collecting chute is connected with a liquid-cooled cooler, a coil pipe is arranged in the liquid-cooled cooler, a cooling liquid inlet of the coil pipe is connected with a cooling liquid outlet of the coil pipe through a cooling liquid circulating pipeline, a heat conduction oil tank, a heat exchanger and a heat conduction oil circulating pump are arranged on the cooling liquid circulating pipeline, and the heat exchanger is arranged in a water seal tank of a machine side water seal type dust removal main pipe; a coke discharging valve is arranged at the bottom of the liquid-cooled cooler; the coke discharging valve is connected with a dense-phase pump through a telescopic sleeve and a dome valve, and the dense-phase pump is connected with a head-tail coke collecting hopper through a pneumatic conveying pipe. And the head and tail coke cooling treatment process is totally closed, so that zero pollutant emission is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of coke oven coking, in particular to a cooling treatment system for the head and tail coke of a coke oven. Background Art

[0002] During the production process of a coke oven, various coke oven machinery is required for production operations. Among them, the pusher on the machine side runs on a track parallel to the longitudinal direction of the coke oven, and implements coke oven production operations according to a fixed time sequence, such as removing and hanging the oven door, cleaning the door, cleaning the frame, discharging coke, etc.; during the pusher operation with the oven door on the machine side open, some coke (referred to as head and tail coke) will fall at the head and tail of the oven. The coke oven machinery collects these fallen red-hot coke, cools it down, and then sends it to a special collection box on the ground.

[0003] The conventional treatment method for the above head and tail coke is to spray water for cooling after collection, such as the "head and tail coke treatment device" disclosed in the Chinese utility model patent with the publication number CN208649228U and the "head and tail coke treatment system with a spraying system" disclosed in the Chinese utility model patent with the publication number CN220665214U; harmful gas-containing gas will be generated during the process of spraying water to cool the head and tail coke. At the same time, natural water drainage is unavoidable during the transportation of the coke quenched with water, and the water containing pollutants will also cause ground pollution. With the increasingly strict current environmental protection requirements, rainwater and sewage separation is required in many areas, that is, the ground drainage system and the production drainage system must be separated, and the traditional treatment method for head and tail coke cannot meet the above requirements. Summary of the Invention

[0004] The utility model provides a cooling treatment system for the head and tail coke of a coke oven, which cools the head and tail coke to a lower temperature (below 200 °C) by an indirect cooling method. The cooled head and tail coke is transported in a closed manner (pneumatic conveying), and is centrally collected into a collection tank and then transported by a tank truck. The whole process of cooling and treating the head and tail coke is fully enclosed, realizing zero pollutant discharge.

[0005] In order to achieve the above purpose, the utility model is realized by adopting the following technical solutions:

[0006] A coke oven head and tail coke cooling treatment system includes a head and tail coke collection chute, a liquid-cooled cooler, a heat-conducting oil tank, a machine-side water-sealed dust removal main pipe, a dense-phase pump, and a head and tail coke collection hopper; the discharge end of the head and tail coke collection chute is connected to the head and tail coke inlet at the top of the liquid-cooled cooler. Coils are provided inside the liquid-cooled cooler. The coolant inlet of the coils is connected to the coolant outlet of the coils through a coolant circulation pipeline. Along the coolant flow direction on the coolant circulation pipeline, there are successively arranged a heat-conducting oil tank, a heat exchanger, and a heat-conducting oil circulation pump, where the heat exchanger is arranged in the water-sealed tank of the machine-side water-sealed dust removal main pipe; a discharge coke valve is provided at the head and tail coke outlet at the bottom of the liquid-cooled cooler; the discharge coke valve is connected to the dense-phase pump through a telescopic sleeve and a dome valve, and the dense-phase pump is connected to the head and tail coke collection hopper through a pneumatic conveying pipe.

[0007] Further, the head and tail coke collection chute, the liquid-cooled cooler, and the heat-conducting oil tank, heat exchanger, and heat-conducting oil circulation pump on the coolant circulation pipeline are all arranged on the pusher on the machine side; the dense-phase pump and the head and tail coke collection hopper are installed on the ground; the cooler is immersed below the liquid level of the water-sealed tank and moves with the pusher.

[0008] Further, a flap with a counterweight and an actuator is provided at the opening of the head and tail coke collection chute, and the head and tail coke collection chute and the head and tail coke inlet of the liquid-cooled cooler are flexibly connected through an inlet compensator.

[0009] Further, the liquid-cooled cooler consists of a cooler body, a lower buffer hopper, and a thermometer; the cooler body is successively provided with coils, a coil fixing wall, and a heat shield from the inside to the outside; a lower buffer hopper is provided at the bottom of the cooler body, and a thermometer is provided on one side of the lower buffer hopper; a head and tail coke outlet is provided at the bottom of the lower buffer hopper, and a manual cut-off valve is provided between the head and tail coke outlet and the discharge coke valve; the discharge coke valve is an electric type discharge coke valve.

[0010] Further, the coils are made of heat-resistant and wear-resistant metal materials, and a wear-resistant coating is provided on the outer layer.

[0011] Further, an outlet valve is provided on the coolant circulation pipeline upstream of the heat-conducting oil tank; the heat-conducting oil tank is provided with a supplementary heat-conducting oil inlet, which is connected to a supplementary oil tank through an oil injection pipeline, and an oil filling valve is provided on the oil injection pipeline; an inlet valve is provided on the heat-conducting oil inlet pipeline of the supplementary oil tank.

[0012] Further, 2 groups of heat-conducting oil circulation pumps are provided, one for normal operation and one for standby; maintenance valves are respectively provided at the inlet and outlet ends of each group of heat-conducting oil circulation pumps.

[0013] Further, the heat exchanger is a finned tube heat exchanger, and a valve is provided on the coolant circulation pipeline upstream of the heat exchanger.

[0014] Furthermore, the telescopic sleeve is composed of an upper fixed sleeve and a lower movable sleeve; the upper fixed sleeve is connected to the coke discharging valve, and the lower movable sleeve is suspended outside the upper sleeve and can move up and down under the action of an electric actuator; a soft sealing structure is provided between the upper fixed sleeve and the lower movable sleeve, and a hard sealing structure is provided between the lower movable sleeve and the inlet pipe of the dome valve.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] 1) By utilizing the forced circulation heat exchange effect of the coolant (heat transfer oil), the head and tail coke generated during the coke pushing operation of the coke oven is indirectly cooled, and the head and tail coke can be cooled to a lower temperature (below 200 °C); the liquid-cooled cooler adopts a coil structure and can adapt to harsh external working conditions and internal temperature and pressure changes.

[0017] 2) A head and tail coke collecting chute with a flap is adopted to ensure the sealing during the loading process of the head and tail coke, and a telescopic sleeve with a sealing structure is docked with the dense phase pump to ensure the sealing during the discharging process of the cooled head and tail coke; the cooled head and tail coke is collected into the head and tail coke collecting hopper by means of a closed transportation method (pneumatic conveying) and then transported out by a transport tank truck in a centralized manner. The cooling treatment process of the head and tail coke is fully enclosed, achieving zero pollutant emissions.

[0018] 3) The water seal water of the water seal type dust removal main pipe on the coke oven machine side is used to cool the circulating heat transfer oil for indirectly cooling the head and tail coke, developing the potential function of the existing facilities, ensuring the continuity of the head and tail coke cooling process, and only consuming electric energy when the head and tail coke cooling treatment system is working normally, without additional consumption of public auxiliary media.

[0019] 4) The system can achieve fully automated operation, greatly reducing the working intensity of the operators, and the operators do not come into contact with toxic and harmful substances, improving the working environment of the workers.

[0020] 5) An integrated and modular structure is adopted, which can be connected to the coke oven machinery control system as a part of the coke oven machinery, improving the configuration level of the coke oven machinery. The entire operation process can be remotely operated, improving the automation level of coke oven production. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a schematic structural diagram of a head and tail coke cooling treatment system of the present utility model.

[0022] Figure 2 is a schematic structural diagram of the liquid-cooled cooler of the present utility model.

[0023] In the figure: 1 - head and tail coke; 2 - head and tail coke collection chute; 3 - liquid-cooled cooler; 31 - cooler body; 32 - heat shield; 33 - lower buffer hopper; 34 - thermometer; 4 - manual cut-off valve; 5 - coke discharging valve; 6 - telescopic sleeve; 7 - dome valve; 8 - dense-phase pump; 9 - outlet valve; 10 - heat-conducting oil tank; 11 - supplementary oil tank; 12 - inlet valve; 13 - oil injection pipeline; 14 - heat exchanger; 15 - heat-conducting oil circulation pump; 16 - pneumatic conveying pipe; 17 - head and tail coke collection hopper; 18 - machine-side water-sealed dust removal main pipe; 19 - transport tank truck Detailed implementation manners

[0024] The following further explains the detailed implementation manners of the present utility model in conjunction with the accompanying drawings:

[0025] As Figure 1 shown, a head and tail coke cooling and treatment system of the present utility model is composed of a head and tail coke collection chute 2, a liquid-cooled cooler 3, a coke discharging valve 5, a telescopic sleeve 6, a dense-phase pump 8, a pneumatic conveying pipe 16, a heat-conducting oil tank 10, a supplementary oil tank 11, a heat-conducting oil circulation pump 15, a coolant circulation pipeline, etc., and cooperates with a machine-side water-sealed dust removal main pipe 18, a transport tank truck 19, etc. to realize the cooling and transportation of head and tail coke.

[0026] A head and tail coke cooling and treatment system of the present utility model can be divided into a part mounted on a coke oven machinery vehicle and a pneumatic conveying part and a heat exchange part arranged on the ground. The part mounted on the coke oven machinery vehicle includes a head and tail coke collection chute 2, a liquid-cooled cooler 3, a coke discharging valve 5, a telescopic sleeve 6, a heat-conducting oil tank 10, a supplementary oil tank 11, a heat-conducting oil circulation pump 15, a coolant circulation pipeline, etc., and is installed on a pusher on the machine side (for a stamping coke oven, it can be installed on a pusher on the machine side or on an SCP (stamping coal charging and coke pushing machine)). In the pneumatic conveying part, a dense-phase pump 8 and a head and tail coke collection hopper 17 are both installed at fixed positions on the ground, and a heat exchanger 14 is installed in a water seal tank of a machine-side water-sealed dust removal main pipe 18, and the machine-side water-sealed dust removal main pipe 18 is a component of the coke oven dust removal system and is arranged on the ground.

[0027] As Figure 2 shown, the liquid-cooled cooler 3 of the present utility model is composed of a cooler body 31, a lower buffer hopper 33 and a thermometer 34; the cooler body 31 is sequentially provided with a coil pipe, a coil pipe fixing wall and a heat shield 32 from the inside to the outside; a lower buffer hopper 33 is arranged at the bottom of the cooler body 31, and a thermometer 34 is arranged on one side of the lower buffer hopper 33; a head and tail coke outlet is arranged at the bottom of the lower buffer hopper 33, and a manual cut-off valve 4 is arranged between the head and tail coke outlet and the coke discharging valve 5; the coke discharging valve 5 is an electric type coke discharging valve.

[0028] An outlet valve 9 is provided on the coolant circulation pipeline upstream of the heat-conducting oil tank 10 of the present utility model; the heat-conducting oil tank 10 is provided with a supplementary heat-conducting oil inlet, which is connected to a supplementary oil tank 11 through an oil injection pipeline 13, and an oil filling valve is provided on the oil injection pipeline 13; an inlet valve 12 is provided on the heat-conducting oil inlet pipeline of the supplementary oil tank 11.

[0029] The working process of the head and tail coke cooling treatment system of the present utility model is as follows:

[0030] The head and tail coke 1 is collected by the collecting tray on the coke oven machinery and then overturned into the head and tail coke collecting chute 2. A flap with a counterweight and an actuator is provided in the head and tail coke collecting chute 2. The flap is opened before the head and tail coke enters and closed after the head and tail coke is loaded to block the contact between the red-hot coke and the outside. The head and tail coke entering the head and tail coke collecting chute 2 falls into the liquid-cooled cooler 3 under the action of gravity. A coil structure is provided inside the liquid-cooled cooler 3. The coil is made of heat-resistant and wear-resistant material and is provided with an anti-wear layer; the outer wall of the coil contacts the red-hot head and tail coke, and the coil is filled with a coolant (heat-conducting oil); the heat of the coke in the liquid-cooled cooler 3 is transferred to the coolant through the coil wall. The coolant is driven by a heat-conducting oil circulation pump 15 to circulate in the coolant circulation pipeline, continuously taking away the heat of the coke. The heat-conducting oil after heat exchange and temperature rise flows out from the coil outlet, passes through the heat-conducting oil tank 10 and enters the heat exchanger 14. The heat exchanger 14 is immersed under the water seal liquid level of the machine-side water-sealed dust removal main pipe 18 and moves with the coke oven machinery, taking away the heat of the heat-conducting oil by exchanging heat with the water seal water. The cooled heat-conducting oil re-enters the liquid-cooled cooler 3 from the coil inlet under the drive of the heat-conducting oil circulation pump 15 to continue cooling the coke. The heat-conducting oil circulation pump 15 works continuously and is configured with one working and one standby to ensure the continuity of the head and tail coke cooling treatment. A supplementary oil tank 11 is provided on the upper part of the heat-conducting oil tank 10, and the heat-conducting oil in the heat-conducting oil tank 10 can be supplemented or replaced during startup or equipment maintenance.

[0031] After the head and tail coke is cooled to a certain temperature (measured by an internal thermometer) in the liquid-cooled cooler 3, it is discharged. The coke discharging is carried out at a fixed position. When discharging the coke, the pusher reaches the designated position, and the telescopic sleeve 6 extends out and is connected to the inlet of the dense-phase pump 8 located on the ground. The telescopic sleeve 6 is composed of an upper fixed sleeve and a lower moving sleeve. The upper fixed sleeve is connected to the outlet of the coke discharging valve 5, and the lower moving sleeve is suspended outside the upper fixed sleeve through an electric actuator (electric cylinder) and can move up and down. A soft seal structure is provided between the upper opening of the lower moving sleeve and the lower opening of the upper fixed sleeve, and a hard seal structure is provided between the outlet of the lower moving sleeve and the inlet pipe of the dome valve 7. The above seal structure can ensure the sealing performance of the coke discharging operation. After the telescopic sleeve 6 is in place, the coke discharging valve 5 and the dome valve 7 are opened for coke discharging (delay control). After the coke discharging is completed, the ash discharging valve 5 and the dome valve 7 are closed, the telescopic sleeve 6 is retracted, and the pusher can move to perform other operations.

[0032] The dense-phase pump 8 discharges the head and tail coke to the head and tail coke collection hopper 17 on the ground through the pneumatic conveying pipe 16, and is centrally transported out by the transport tank truck 19. The number of the dense-phase pumps 8 is determined according to the scale of the coke oven and the amount of the head and tail coke, and multiple ones can be set. The coke pusher can repeat the above coke discharging operation for multiple times. The position of the dense-phase pump 8 is fixed (it can be set in the coke oven section), so the discharging operation of the cooled head and tail coke can be carried out simultaneously with other operations (such as coke pushing or coal levelling) at the fixed position of the coke pusher.

[0033] The above are only the preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, making equivalent substitutions or changes, shall be covered by the protection scope of the present invention.

Claims

1. A coke oven head and tail coke cooling treatment system, characterized in that, It includes a head and tail coke collecting chute, a liquid-cooled cooler, a heat-conducting oil tank, a machine-side water-sealed dust removal main pipe, a dense-phase pump and a head and tail coke collecting hopper; the discharge end of the head and tail coke collecting chute is connected to the head and tail coke inlet at the top of the liquid-cooled cooler. Coils are arranged inside the liquid-cooled cooler. The coolant inlet of the coils is connected to the coolant outlet of the coils through a coolant circulation pipeline. Along the coolant flow direction on the coolant circulation pipeline, there are successively arranged a heat-conducting oil tank, a heat exchanger and a heat-conducting oil circulation pump, wherein the heat exchanger is arranged in the water-sealing tank of the machine-side water-sealed dust removal main pipe; a coke discharging valve is arranged at the head and tail coke outlet at the bottom of the liquid-cooled cooler; the coke discharging valve is connected to the dense-phase pump through a telescopic sleeve and a dome valve, and the dense-phase pump is connected to the head and tail coke collecting hopper through a pneumatic conveying pipe.

2. The coke oven head and tail coke cooling treatment system according to claim 1, characterized in that, The head and tail coke collecting chute, the liquid-cooled cooler, and the heat-conducting oil tank, the heat exchanger and the heat-conducting oil circulation pump on the coolant circulation pipeline are all arranged on the pusher on the machine side; the dense-phase pump and the head and tail coke collecting hopper are installed on the ground; the cooler is immersed below the liquid level of the water-sealing tank and moves with the pusher.

3. The coking oven head and tail coke cooling treatment system according to claim 1, characterized in that A flap with a counterweight and an actuator is arranged at the opening of the head and tail coke collecting chute, and the head and tail coke collecting chute and the head and tail coke inlet of the liquid-cooled cooler are flexibly connected through an inlet compensator.

4. A coke oven head and tail coke cooling treatment system according to claim 1, characterized in that, The liquid-cooled cooler is composed of a cooler body, a lower buffer hopper and a thermometer; the cooler body is successively provided with coils, a coil fixing wall and a heat shield from the inside to the outside; a lower buffer hopper is arranged at the bottom of the cooler body, and a thermometer is arranged on one side of the lower buffer hopper; a head and tail coke outlet is arranged at the bottom of the lower buffer hopper, and a manual cut-off valve is arranged between the head and tail coke outlet and the coke discharging valve; the coke discharging valve is an electric type coke discharging valve.

5. The coking oven head and tail coke cooling treatment system according to claim 1, characterized in that, The coils are made of heat-resistant and wear-resistant metal materials, and a wear-resistant coating is arranged on the outer layer.

6. The coke oven head and tail coke cooling treatment system according to claim 1, characterized in that, An outlet valve is arranged on the coolant circulation pipeline upstream of the heat-conducting oil tank; the heat-conducting oil tank is provided with a supplementary heat-conducting oil inlet, which is connected to a supplementary oil tank through an oil injection pipeline, and an oil filling valve is arranged on the oil injection pipeline; an inlet valve is arranged on the heat-conducting oil inlet pipeline of the supplementary oil tank.

7. A coke oven head and tail coke cooling treatment system according to claim 1, characterized in that, Two groups of heat-conducting oil circulation pumps are provided, one for normal operation and one for standby; maintenance valves are respectively arranged at the inlet and outlet ends of each group of heat-conducting oil circulation pumps.

8. A coke oven head and tail coke cooling treatment system according to claim 1, characterized in that, The heat exchanger is a finned tube heat exchanger, and a valve is arranged on the coolant circulation pipeline upstream of the heat exchanger.

9. The coke oven head and tail coke cooling treatment system according to claim 1, characterized in that, The telescopic sleeve is composed of an upper fixed sleeve and a lower movable sleeve; the upper fixed sleeve is connected to the coke discharging valve, the lower movable sleeve is suspended outside the upper sleeve and can move up and down under the action of an electric actuator; a soft seal structure is arranged between the upper fixed sleeve and the lower movable sleeve, and a hard seal structure is arranged between the lower movable sleeve and the dome valve inlet pipe.

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