Dry quenching anti-explosion coke loading device

Abstract

The utility model relates to a dry quenching anti-explosion coke loading device, which belongs to the technical field of metallurgical energy conservation and environmental protection, and comprises a top water seal cover, a high-temperature-resistant first seal valve, a top high-temperature storage tank, a high-temperature-resistant split gate valve, a high-temperature-resistant lower seal valve and a high-temperature-resistant material distributor which are arranged from top to bottom, the high-temperature-resistant lower sealing valve is fixed to the top of a cone of an existing dry quenching furnace, and an inert gas purging system is arranged on the top high-temperature storage tank. According to the anti-explosion coke loading device for dry quenching, the major problem of internal explosion caused by cone positive pressure flaming and cone negative pressure during loading under the working condition of 1000 DEG C high temperature of dry quenching is solved. According to the utility model, the explosion-proof effect is realized when entering a fully-closed state; when red coke is loaded, the accident of flame ejection is avoided; when the coke falls into the dry quenching furnace, the pressure of the cone of the dry quenching furnace is large or lower than-100 Pa, explosion is avoided, and safe coke loading of dry quenching can be achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of metallurgical energy conservation and environmental protection, and in particular relates to a dry coke quenching explosion-proof coke loading device. Background Art

[0002] The dry quenching waste heat recovery power generation device is a device for coking plants to recover the high-temperature heat energy of coke and improve energy utilization efficiency. The dry quenching furnace is the core furnace equipment of the dry quenching waste heat recovery power generation device, which is used for heat exchange between high-temperature coke and nitrogen. At present, the overall structure of the dry quenching furnace is a water seal cover 1, a cone 2, a pre-storage chamber 3, an annular air duct 4, a ramp 5, and a cooling section 6 from top to bottom. Figure 1 As shown. When loading the CDQ waste heat recovery power generation device, the water seal cover needs to be opened to load the coke into the CDQ furnace. The specific process is: the high-temperature coke in the coking plant is pushed out of the coke oven and falls into the coke tank. The coke tank is transported to the hoist derrick by the transport trolley. The hoist lifts the coke tank and moves it horizontally to the top of the CDQ furnace. At the same time, the loading device is also moved horizontally to the top of the CDQ furnace and aligned. Then the water seal cover on the top of the CDQ furnace cone is opened, the coke tank is docked with the loading device, and the coke in the coke tank falls into the CDQ furnace, completing a loading process.

[0003] A large amount of high-temperature coke is stored in the CDQ pre-storage room. The residual volatile content of coke is usually 1% to 2%. Under high temperature conditions, hydrogen and carbon monoxide will be decomposed and gathered in the cone at the top of the CDQ oven. 90% of the combustible gas in the cone is pure hydrogen and 10% is CO. The temperature is 1000℃, which has the characteristics of low explosion limit and high temperature. If the CDQ oven cone is in a positive pressure state, when the top water seal cover is opened for CDQ, the combustible gas will spray out and immediately burn to form a huge fire column, making it impossible to load coke and causing environmental pollution. If the negative pressure of the CDQ oven cone is lower than -100Pa, when loading coke, outside air will enter the cone, and the oxygen and hydrogen in the air will form an explosive mixed gas, resulting in an explosion accident.

[0004] The traditional blast furnace ironmaking charging device can only be used in low-temperature working environments and is used to load iron ore, sintered ore, coke, lime and other materials. These materials are usually at a temperature of -10℃ to 35℃ and do not contain volatile gases such as hydrogen. The temperature environment at the top of the blast furnace is lower than 400℃, and the lower sealing valve does not need a cooling system to work normally. However, the temperature of the cone space at the top of the CDQ furnace is 1000℃, and the traditional blast furnace lower sealing valve cannot withstand such high temperatures and will soon be deformed and damaged by high temperatures. The blast furnace is a high-pressure furnace body with a pressure usually higher than 200,000 Pascals and no negative pressure conditions. The blast furnace charging system releases blast furnace gas, the combustible gas CO content is 25%, hydrogen is only 2%, and the remaining gas components are nitrogen and carbon dioxide, the temperature is between 175℃ and 225℃, the lower explosion limit is usually higher than 15%, and it is difficult to form explosive gases with air. Therefore, the structure of the blast furnace charging system is also not suitable for the explosive conditions of high-purity hydrogen and high temperature in CDQ, and cannot be used in CDQ.

[0005] Therefore, the dry coke quenching technology urgently needs a device that can adapt to the high temperature working conditions of 1000℃ coke, prevent fire from spraying during dry coke quenching loading, and prevent explosion inside the vertebral body, so as to ensure the smooth production of dry coke quenching. Utility Model Content

[0006] In view of the deficiencies in the prior art and for the safe and reliable operation of dry coke quenching in a coking plant, the utility model provides a dry coke quenching explosion-proof coke loading device to solve the serious problem of positive pressure flame spraying from the vertebral body and negative pressure from the vertebral body causing internal explosion during loading under high temperature conditions of 1000°C for dry coke quenching.

[0007] A device for explosion-proof coke loading for dry coke quenching comprises a top water seal cover, a high-temperature resistant first sealing valve, a top high-temperature storage tank, a high-temperature resistant split gate valve, a high-temperature resistant lower sealing valve and a high-temperature resistant material distributor which are arranged from top to bottom. The high-temperature resistant lower sealing valve is fixed to the top of the cone of an existing dry quenching furnace, and an inert gas purge system is arranged on the top high-temperature storage tank.

[0008] The water seal cover on the top is a CDQ water seal structure, the water seal cover adopts a circular structure with a diameter of 3000 mm to 4000 mm; or the water seal cover adopts a square structure with a side length of 3000 mm to 4000 mm.

[0009] The high-temperature resistant first sealing valve is located below the water seal cover, and comprises an upper flange I, a lower flange I and a high-temperature resistant lining fixed between the upper flange I and the lower flange I, and the outer side of the high-temperature resistant lining is a metal shell; bearings are provided at both ends of the cooling valve plate, which are fixed on the valve plate bearing seat; a high-temperature resistant and wear-resistant coating is coated on the entire outer surface of the high-temperature resistant first sealing valve; the cooling valve plate is precision cast as a whole using 310S stainless steel cast steel, formed in one step, and has an elliptical cross-section; a cooling channel cavity is provided inside the cooling valve plate, one end of the cavity is a cooling medium inlet, and the other end is a cooling medium outlet; the three valve plates are in the form of shutter structures, and the rotation drive of the valve plates is driven by a motor.

[0010] The high temperature resistant first sealing valve is a circular structure or a square structure.

[0011] The high temperature resistant first sealing valve is a circular structure, and the cooling valve plate is divided into three valve plates: left, middle and right. The arc of the valve plate fits the high temperature resistant lining;

[0012] The high temperature resistant first sealing valve has a square structure, and the cooling valve plate is divided into three rectangular valve plates of the same size: left, middle and right, which are fitted with the high temperature resistant lining.

[0013] The high temperature and wear resistant coating is a tungsten carbide nickel-based alloy high temperature coating or a high temperature flame sprayed corundum coating.

[0014] The top high-temperature storage tank includes an upper flange II, an upper cone, a cylinder, a lower funnel, and a lower flange II arranged from top to bottom; the upper cone is provided with an inert gas outlet, and the lower funnel is provided with an inert gas inlet; the top high-temperature storage tank is respectively composed of a steel shell, a refractory fiberboard layer, a castable layer, and a refractory brick layer from outside to inside; the castable layer is cast with high-temperature resistant corundum mullite, and the refractory brick layer is made of silicon carbide mullite brick or Sialon combined with silicon carbide brick.

[0015] The inert gas purge system includes an inert gas inlet pipeline arranged on the funnel, an air intake collecting pipe is arranged at the gas inlet end of the inert gas inlet pipeline, the air intake collecting pipe is connected to the air intake main pipe, and a valve is arranged between the air intake main pipe and the inert gas storage tank as an inert gas purge inlet; a plurality of inert gas nozzles are arranged on the inner wall of the air intake collecting pipe, and the number of the inert gas nozzles is consistent with the number of inert gas inlets; the inert gas purge system also includes a purge gas outlet branch pipe arranged on the upper vertebral body, and the number of the purge gas outlet branch pipes is consistent with the number of inert gas outlets; an outlet collecting pipe is arranged at the gas outlet end of the purge gas outlet branch pipe, and the outlet collecting pipe is connected to the explosion-proof incinerator, the dust collector and the induced draft fan in sequence through the outlet main pipe.

[0016] The high-temperature resistant split gate valve comprises a wear-resistant high-temperature hard alloy valve seat and a cooling gate plate on the wear-resistant high-temperature hard alloy valve seat. The cooling gate plate is two split gate plates, and the material of the gate plate is 310S; each gate plate is a cast valve plate with a water-cooled cavity structure that is integrally cast, and the interior is a water-cooled cavity; reinforcing ribs are correspondingly arranged on the upper and lower surfaces of the water-cooled cavity; a nickel-based alloy tungsten carbide composite coating is welded on the surface of the cooling gate plate; the opening and closing of the cooling gate plate is driven by an electric hydraulic cylinder.

[0017] The high-temperature resistant lower sealing valve includes a valve cylinder, and a refractory lining is arranged inside the valve cylinder; a water-cooled sealing jacket flange is fixed on the top of the valve cylinder, and a lower flange III is fixed on the bottom, and a water-cooled rotary sealing valve plate is fixed to the lower surface of the water-cooled sealing jacket flange through a rotating shaft, and the rotating shaft is driven by a rotating motor to rotate; when the rotating shaft drives the water-cooled rotary sealing valve plate to be at 0°, that is, in a horizontal state, it enters a closed state, and the water-cooled rotary sealing valve plate is closed with the lower edge of the water-cooled sealing jacket flange; when the rotating shaft drives the water-cooled rotary sealing valve plate to be at 90°, it is in an open state.

[0018] The high-temperature resistant material distributor is located at the lower part of the high-temperature resistant lower sealing valve, and includes a conical distributor and a supporting water beam at its bottom; the conical distributor is conical in shape and is integrally cast with high-temperature resistant alloy steel; the surface of the conical distributor is inlaid with a high-temperature resistant hard alloy lining plate, and a water-cooling cavity is arranged inside, which is communicated with the supporting water beam and can be cooled by circulating cooling water; the shape of the high-temperature resistant hard alloy lining plate fits the upper surface of the conical distributor; there are 4 fixed cylinders on the surface of the conical distributor, and the high-temperature resistant alloy lining plate has reserved holes, which can be connected at one time and fixed by welding with nickel-based high-temperature welding wire.

[0019] The beneficial effect of the utility model is that when the device provided by the utility model enters a fully closed state, the combustible gas of the upper cone of the dry quenching furnace cannot enter the top high-temperature storage tank through the lower sealing valve, and the outside air cannot enter the top high-temperature storage tank through the water sealing cover, thereby achieving explosion-proof.

[0020] When loading red coke, the high temperature resistant split gate valve and the lower sealing valve are closed, and the top high temperature storage tank is purged with inert gas. No explosive gas will be formed inside the top high temperature storage tank, and it will not explode. The wear-resistant high temperature hard alloy on the surface of the high temperature resistant split gate valve can withstand the impact of the falling high temperature coke. The lower cooling gate can withstand the gravity of the coke without deformation due to the reinforcement ribs inside the water cooling cavity to increase the strength. After a can of coke is loaded, the high temperature resistant first sealing valve is closed, the coke can is taken away by the elevator, the water seal cover is closed, and the coke is safely loaded into the top high temperature storage tank without the accident of flame spraying.

[0021] When the coke falls into the dry quenching furnace, open the high temperature resistant lower sealing valve, then open the high temperature resistant split gate valve, and the high temperature coke falls, and passes through the high temperature resistant material distributor and falls evenly into the dry quenching furnace. The coke in the top high temperature storage tank can all fall into the dry quenching furnace or part of it, and it can be operated flexibly according to the actual situation. When the pressure of the dry quenching furnace cone is high, part of the hydrogen enters the top high temperature storage tank. Since the first high temperature sealing valve is closed and the water seal cover is closed, the hydrogen will not leak to the outside and cause a flame. When the pressure of the dry quenching furnace cone is lower than -100Pa, since the first high temperature sealing valve is closed and the water seal cover is closed, the outside air cannot enter the top high temperature storage tank and the dry quenching furnace cone, and no explosion will occur.

[0022] After the high-temperature coke enters the dry quenching furnace, close the high-temperature resistant split gate valve first, and then close the high-temperature resistant lower sealing valve. The top high-temperature storage tank is separated from the dry quenching furnace, and after being purged with inert gas, it enters a safe state. Then the next step of loading coke can be carried out, so that the dry quenching coke can be safely loaded. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the dry quenching furnace of the current prior art;

[0024] Figure 2 A schematic diagram of a device for explosion-proof coke loading for dry coke quenching provided by the utility model;

[0025] Figure 3 A front view of a high temperature resistant first sealing valve provided in Example 1 of the utility model;

[0026] Figure 4 A side view of a high temperature resistant first sealing valve provided in Example 1 of the utility model;

[0027] Figure 5 A schematic diagram of a valve plate in a high temperature resistant first sealing valve provided in Example 1 of the utility model;

[0028] Figure 6 A front view of a high temperature resistant first sealing valve provided in Example 2 of the utility model;

[0029] Figure 7 A side view of a high temperature resistant first sealing valve provided in Example 2 of the utility model;

[0030] Figure 8 A schematic diagram of a valve plate in a high temperature resistant first sealing valve provided in Example 2 of the utility model;

[0031] Fig. 9 It is a schematic diagram of the top high temperature storage tank in the utility model;

[0032] Fig.10It is a structural schematic diagram of the air inlet end of the inert gas purge system in the utility model;

[0033] Fig.11 It is a structural schematic diagram of the gas outlet end of the inert gas purge system in the utility model;

[0034] Fig.12 It is a schematic diagram of a high temperature resistant split gate valve in the utility model;

[0035] Fig.13 It is a structural schematic diagram of the cooling gate of the high temperature resistant split gate valve;

[0036] Fig.14 It is a structural schematic diagram of the open state of the high temperature resistant sealing valve in the utility model;

[0037] Fig.15 It is a structural schematic diagram of the closed state of the high temperature resistant sealing valve in the utility model;

[0038] Fig.16 It is a structural schematic diagram of the high temperature resistant material distributor in the utility model;

[0039] in,

[0040] 1-water seal cover, 2-cone, 3-pre-storage chamber, 4-annular air duct, 5-inclined channel, 6-cooling section, 7-high temperature resistant first sealing valve, 701-upper flange I, 702-lower flange I, 703-high temperature resistant lining, 704-metal shell, 705-valve plate, 706-cooling medium inlet, 707-cooling medium outlet, 708-valve plate bearing seat, 709-cooling valve plate, 7010-rectangular valve plate, 8-top high temperature storage tank, 801-upper flange II, 802-upper cone, 803-cylinder, 804-lower funnel, 805-lower flange II, 806-steel shell, 807-refractory fiberboard layer, 808-casting material layer, 809-refractory brick layer, 9-inert gas purge system, 901-inert gas inlet pipeline, 902-intake manifold, 903 -air inlet main pipe, 904-valve, 905-inert gas purge inlet, 906-inert gas nozzle, 907-outlet gas collecting pipe, 908-outlet main pipe, 909-purge gas outlet branch pipe, 9010-explosion-proof incinerator, 9011-dust collector, 9012-induced draft fan, 10-high temperature resistant split gate valve, 1001-wear-resistant high temperature hard alloy valve seat, 1002-cooling gate, 1003-water-cooled cavity, 1004-reinforcement rib, 11-high temperature resistant lower sealing valve, 1101-valve cylinder, 1102-refractory lining, 1103-water-cooled sealing jacket flange, 1104-lower flange III, 1105-water-cooled rotary sealing valve plate, 12-high temperature resistant material distributor, 1201-conical distributor, 1202-supporting water beam, 1203-water-cooled cavity. DETAILED DESCRIPTION

[0041] In order to better explain the present invention and facilitate understanding, the technical scheme and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0042] Example 1

[0043] In a coking enterprise, the 160 tons / hour dry coke quenching often causes unstable cone pressure. In order to ensure the safe and reliable operation of the coking plant's dry coke quenching, it is necessary to solve the major problems of cone positive pressure flame spraying during loading or cone negative pressure causing internal explosion under high temperature conditions of 1000℃ dry coke quenching.

[0044] In view of the above problems, this embodiment provides a device for dry quenching explosion-proof coke loading, such as Figure 2 As shown, it includes a top water seal cover 1, a high temperature resistant first sealing valve 7, a top high temperature storage tank 8, a high temperature resistant double-opening gate valve 10, a high temperature resistant lower sealing valve 11 and a high temperature resistant material distributor 12 arranged from top to bottom, and the high temperature resistant lower sealing valve 11 is fixed on the top of the cone 2 of the existing dry quenching furnace.

[0045] The water seal cover 1 on the top is a CDQ water seal structure, which is a mature and reliable product. It is an indispensable part of CDQ environmental protection and dust prevention. CDQ production is fast, and usually 6 cans of coke are loaded per hour. The water seal cover 1 is required to have a large enough diameter to ensure that the coke is loaded quickly. The water seal cover 1 of this embodiment adopts a circular structure with a diameter of 3300 mm.

[0046] like Figure 3-4 As shown, the high temperature resistant first sealing valve 7 is located below the water seal cover 1, and can quickly complete the valve opening and closing function. The coke temperature is 1000°C, and the valve plate is required to have high temperature resistance and wear resistance, and not to deform under continuous high temperature use. The high temperature resistant first sealing valve 7 includes an upper flange I701, a lower flange I702, and a high temperature resistant lining 703 fixed between the upper flange I701 and the lower flange I702. The outer side of the high temperature resistant lining 703 is a metal shell 704; the two ends of the cooling valve plate 709 are bearings fixed on the valve plate bearing seat 708. The high temperature resistant and wear-resistant coating is coated on the outer surface of the entire high temperature resistant first sealing valve 7. The high temperature resistant first sealing valve 7 is a circular structure, and the cooling valve plate 709 is divided into three valve plates 705 of left, middle and right. The arc of the valve plate 705 fits with the high temperature resistant lining 703, as shown Figure 5 As shown (this figure is only for illustrating the shape and structure of the cooling valve plate 709 provided in this embodiment, and does not represent the actual working state). The high temperature and wear resistant coating adopts a tungsten carbide nickel-based alloy high temperature coating. The cooling valve plate 709 is integrally precision cast with 310S stainless steel cast steel, formed in one step, and its cross section is elliptical.

[0047] A cooling channel cavity is provided inside the cooling valve plate 709 , one end of the cavity is a cooling medium inlet 706 , and the other end is a cooling medium outlet 707 .

[0048] The three valve plates 705 of the cooling valve plate 709 are in the form of shutter structures. When the valve plates 705 are closed horizontally, they can seal the gas to prevent the combustible gas from leaking out, and also prevent the air from entering the top high-temperature storage tank 8. When the valve plates 705 are rotated 90° to open, the high-temperature coke can fall into the top high-temperature storage tank 8. The rotation drive of the valve plates 705 is driven by a motor, and the three valve plates 705 rotate and close at the same time.

[0049] The top high temperature storage tank 8 is used to store more than 30 tons of high temperature coke. The volume of the top high temperature storage tank 8 in this example is 95m 3 .like Fig. 9 As shown, the top high temperature storage tank 8 includes an upper flange II801, an upper cone 802, a cylinder 803, a lower funnel 804, and a lower flange II805 arranged from top to bottom. The upper cone 802 is provided with an inert gas outlet, and the lower funnel 804 is provided with an inert gas inlet. The inert gas outlet and the inert gas inlet are located on opposite sides of the top high temperature storage tank 8. The top high temperature storage tank 8 is composed of a steel shell 806, a refractory fiber board layer 807, a castable layer 808, and a refractory brick layer 809 from outside to inside. In order to adapt to the working conditions of high temperature coke and the impact and temperature changes of repeated loading, the inner layer in direct contact with the coke from inside to outside is the refractory brick layer 809, followed by the castable layer 808, the refractory fiber board 807, and the steel shell 809. The refractory brick layer 809 is made of silicon carbide mullite bricks, and the castable layer 808 is cast with high temperature resistant corundum mullite.

[0050] like Figure 10-11 As shown, the top high-temperature storage tank 8 is provided with an inert gas purge system 9, including an inert gas inlet pipe 901 arranged on the funnel, and the gas inlet end of the inert gas inlet pipe 901 is provided with an air intake manifold 902, the air intake manifold 902 is connected to the air intake main pipe 903, and a valve 904 is provided between the air intake main pipe 903 and the inert gas storage tank (not shown in the figure) as an inert gas purge inlet 905; the inner wall of the air intake manifold 902 is provided with a plurality of inert gas nozzles 906, and the number of the inert gas nozzles 906 is consistent with the number of the inert gas inlets. The inert gas purge system 9 also includes an outlet gas collecting pipe 907 arranged on the upper vertebral body 802, and the outlet gas collecting pipe 907 is connected to the explosion-proof incinerator 9010, the dust collector 9011 and the induced draft fan 9012 in sequence through the outlet main pipe 908; the inner wall of the outlet gas collecting pipe 907 is provided with a plurality of purge gas outlet branch pipes 909, and the number of the purge gas outlet branch pipes 909 is consistent with the number of inert gas outlets.

[0051] The high temperature resistant split gate valve 10 needs to bear the weight and impact of coke, and is required to be high temperature resistant, wear resistant, and non-deformed, and specifically includes a wear resistant high temperature hard alloy valve seat 1001 and a cooling gate 1002 on the wear resistant high temperature hard alloy valve seat 1001. Figure 12-13 As shown, the cooling gate plate 1002 is a two-piece split gate plate, and the material of the gate plate is 310S. Each gate plate is a cast valve plate with a water-cooled cavity 1003 structure that is cast as a whole. The gate plate wall thickness is 25 mm, and the interior is a water-cooled cavity 1003. The upper and lower surfaces of the water-cooled cavity 1003 are correspondingly provided with reinforcing ribs 1004 to improve the mechanical strength. The advantage is that it can withstand the weight of coke without deformation, and under water cooling conditions, the surface temperature of the valve plate is lower than 200°C, which is much lower than the softening temperature of 310S material at 800°C, greatly improving the service life of the gate plate. The surface of the cooling gate plate 1002 is welded with a nickel-based alloy tungsten carbide composite coating, which plays a wear-resistant role. The opening and closing of the cooling gate plate 1002 is driven by an electric hydraulic cylinder, with a fast movement speed and a precise and controllable movement stroke.

[0052] like Figure 14-15 As shown, the high temperature resistant lower sealing valve 11 comprises a valve cylinder 1101, and a refractory lining 1102 is arranged inside the valve cylinder 1101; a water-cooled sealing jacket flange 1103 is fixed on the top of the valve cylinder 1101, and a lower flange III 1104 is fixed on the bottom; a water-cooled rotary sealing valve plate 1105 is fixed on the lower surface of the water-cooled sealing jacket flange 1103 through a rotating shaft, and the rotating shaft is driven by a rotating motor to rotate, thereby realizing the rotation of the water-cooled rotary sealing valve plate 1105, so as to realize the opening and closing of the high temperature resistant lower sealing valve 11. When the rotating shaft drives the water-cooled rotary sealing valve plate 1105 to be at 0°, that is, in a horizontal state, it enters a closed state, and the water-cooled rotary sealing valve plate 1105 is closed with the lower edge of the water-cooled sealing jacket flange, preventing the gas in the dry coke quenching cone from moving upward, and also preventing external gas from entering the dry coke quenching cone; when the rotating shaft drives the water-cooled rotary sealing valve plate 1105 to be at 90°, it is in an open state. The high temperature resistant split gate valve 10 is opened, and the coke inside the top high temperature storage tank 8 falls into the dry coke quenching pre-storage chamber.

[0053] like Fig.16As shown, the high temperature resistant material distributor 12 is located at the lower part of the high temperature resistant lower sealing valve 11, and includes a conical distributor 1201 and a supporting water beam 1202 at its bottom. The conical distributor 1201 is conical and is integrally cast with high temperature resistant alloy steel. The surface of the conical distributor 1201 is inlaid with a high temperature resistant hard alloy lining plate, and a water cooling cavity 1203 is arranged inside, which is connected to the supporting water beam to play a water cooling role, ensuring that the high temperature resistant material distributor 12 does not deform under the impact of high temperature coke. The high temperature resistant hard alloy lining plate is formed by sintering metal tungsten powder, metal cobalt powder, nickel powder and tungsten carbide powder in one step, and its shape fits the upper surface of the conical distributor 1201. There are 4 fixed cylinders on the surface of the conical distributor 1201, and the high temperature resistant alloy lining plate has reserved holes, which can be docked at one time and fixed by welding with nickel-based high temperature welding wire.

[0054] The actual operation steps of the above-mentioned dry quenching explosion-proof coke loading device are as follows:

[0055] The first step is a fully closed state, including closing the high temperature resistant lower sealing valve 11, closing the high temperature resistant split gate valve 10, closing the high temperature resistant first sealing valve 7, and closing the top water seal cover 1.

[0056] In the second step, the inert gas is used to purge the top high-temperature storage tank 8. The inert gas enters the storage tank, takes away the hydrogen and other flammable gases, and burns them in the explosion-proof incinerator 9010. After the exhaust gas passes through the dust collector 9011, it is pressurized by the induced draft fan 9012 and transported to the coke chimney for discharge.

[0057] In the third step, the top high-temperature storage tank 8 is loaded with red coke. The hoist lifts the coke tank to the top of the dry quenching furnace, the top water seal cover 1 is opened, the first high-temperature sealing valve 7 is opened, and the coke falls into the top high-temperature storage tank 8. Then the first high-temperature sealing valve 7 is closed, the coke tank is taken away by the hoist, and then the water seal cover 1 is closed. The top high-temperature storage tank 8 is separated from the air by the water seal cover 1 and the first high-temperature sealing valve 7, and the air will not enter the top high-temperature storage tank 8. The top high-temperature storage tank 8 is in a safe state.

[0058] The fourth step is to drop the coke into the dry quenching furnace. Open the high temperature resistant lower sealing valve 11, then open the high temperature resistant split gate valve 10, and the high temperature coke drops and evenly falls into the dry quenching furnace through the high temperature resistant material distributor 12. The coke in the top high temperature storage tank 8 can all fall into the dry quenching furnace or part of it can fall into the dry quenching furnace, which can be flexibly operated according to the actual situation.

[0059] The fifth step is to first close the high temperature resistant split gate valve 10, and then close the high temperature resistant lower sealing valve 11. Re-enter the fully closed state.

[0060] The benefits of this practical application are:

[0061] The top high-temperature storage tank 8 is a loading buffer for high-temperature coke. When the dry coke quenching cone is in a positive pressure state, the high-temperature resistant split gate valve 10 and the high-temperature resistant lower sealing valve 11 are in a closed state. The top high-temperature storage tank 8 is purged with inert gas before loading. At this time, the high-temperature resistant first sealing valve 7 and the water seal cover 1 are opened, and the combustible gas of the dry coke quenching cone will not enter the top high-temperature storage tank 8, nor will it form a fire column or explode. After loading the coke, the high-temperature resistant first sealing valve 7 and the water seal cover 1 are closed, the high-temperature resistant lower sealing valve 11 is opened, the high-temperature resistant split gate valve 10 is opened, and the coke falls into the dry coke quenching. Even if a part of the combustible gas enters the top high-temperature storage tank 8, all the combustible gas will be taken away and burned in the next inert gas purging step. The top high-temperature storage tank 8 will be filled with inert gas.

[0062] When the pressure of the CDQ cone is lower than -100Pa, the high temperature resistant split gate valve 10 and the high temperature resistant lower sealing valve 11 are in the closed state, the water seal cover 1 and the high temperature resistant first sealing valve 7 are opened, the coke enters the top high temperature storage tank 8, and the air will not enter the CDQ cone to cause an explosion. The top high temperature storage tank 8 is purged with inert gas, and the top high temperature storage tank 8 will not explode.

[0063] Regardless of whether the CDQ cone is under positive pressure or negative pressure, the installation of the above device can prevent fire and cone explosion.

[0064] Example 2

[0065] A large coking enterprise, with a capacity of 260 tons / hour dry quenching, often experiences unstable cone pressure. To ensure the safe and reliable operation of the coking plant's dry quenching, it is necessary to solve the major problems of cone positive pressure flame spraying during loading or cone negative pressure causing internal explosion under high temperature conditions of 1000℃ dry quenching.

[0066] In view of the above problems, the present embodiment provides a device for explosion-proof coke loading for dry quenching, comprising a top water seal cover 1, a high-temperature resistant first sealing valve 7, a top high-temperature storage tank 8, a high-temperature resistant double-opening gate valve 10, a high-temperature resistant lower sealing valve 11 and a high-temperature resistant material distributor 12 arranged from top to bottom, and the high-temperature resistant lower sealing valve 11 is fixed to the top of the cone 2 of the existing dry quenching furnace.

[0067] The water seal cover 1 on the top is a CDQ water seal structure, which is a mature and reliable product. It is an indispensable part of CDQ environmental protection and dust prevention. CDQ production is fast, and usually 6 cans of coke are loaded per hour. The water seal cover 1 is required to have a large enough diameter to ensure that the coke is loaded quickly. The water seal cover 1 is square with a side length of 4000 mm.

[0068] like Figure 6-7As shown, the high temperature resistant first sealing valve 7 is located below the water seal cover 1, and can quickly complete the valve opening and closing function. The coke temperature is 1000°C, and the valve plate is required to have high temperature resistance and wear resistance, and not to deform under continuous high temperature use. The high temperature resistant first sealing valve 7 includes an upper flange I701, a lower flange I702, and a high temperature resistant lining 703 fixed between the upper flange I701 and the lower flange I702. The outer side of the high temperature resistant lining 703 is a metal shell 704; the two ends of the cooling valve plate 709 are bearings fixed on the valve plate bearing seat 708. The high temperature resistant and wear-resistant coating is coated on the outer surface of the entire high temperature resistant first sealing valve 7. The high temperature resistant first sealing valve 7 is a square structure, and the cooling valve plate 709 is divided into three rectangular valve plates 7010 of the same size on the left, middle and right sides, which are fitted with the high temperature resistant lining 703, as shown Figure 8 As shown (this figure is only for illustrating the shape and structure of the cooling valve plate 709 provided in this embodiment, and does not represent the actual working state). The high temperature and wear resistant coating adopts a tungsten carbide nickel-based alloy high temperature coating. The cooling valve plate 709 is integrally precision cast with 310S stainless steel cast steel, formed in one step, and its cross section is elliptical.

[0069] A cooling channel cavity is provided inside the cooling valve plate 709 , one end of the cavity is a cooling medium inlet 706 , and the other end is a cooling medium outlet 707 .

[0070] The three valve plates of the cooling valve plate 709 are in the form of shutter structures. When the valve plates are closed horizontally, they can seal the gas to prevent the flammable gas from leaking out, and also prevent the air from entering the top high-temperature storage tank 8. When the valve plates are rotated 90° to open, the high-temperature coke can fall into the top high-temperature storage tank 8. The rotation drive of the valve plates is driven by a motor, and the three valve plates rotate and close at the same time.

[0071] The top high temperature storage tank 8 is used to store more than 50 tons of high temperature coke. The volume of the top high temperature storage tank 8 in this example is 125m 3 . The top high-temperature storage tank 8 includes an upper flange II801, an upper cone 802, a cylinder 803, a lower funnel 804, and a lower flange II805, which are arranged from top to bottom. The upper cone 802 is provided with an inert gas outlet, and the lower funnel 804 is provided with an inert gas inlet. The inert gas outlet and the inert gas inlet are located on opposite sides of the top high-temperature storage tank 8. The top high-temperature storage tank 8 is composed of a steel shell 806, a refractory fiberboard layer 807, a castable layer 808, and a refractory brick layer 809 from outside to inside. In order to adapt to the working conditions of high-temperature coke and the impact of repeated charging and temperature changes, from inside to outside, they are a refractory brick layer 809, a castable layer 808, a refractory fiberboard 807, and a steel shell 806. The castable layer 808 is cast with high-temperature resistant corundum mullite, and the refractory brick layer 809 is made of Sialon combined with silicon carbide bricks.

[0072] An inert gas purge system 9 is provided on the top high-temperature storage tank 8, including an inert gas inlet pipe 901 arranged on the funnel, and an air intake manifold 902 is provided at the gas inlet end of the inert gas inlet pipe 901, and the air intake manifold 902 is connected to the air intake main pipe 903, and a valve 904 is provided between the air intake main pipe 903 and the inert gas storage tank (not shown in the figure) as an inert gas purge inlet 905; a plurality of inert gas nozzles 906 are provided on the inner wall of the air intake manifold 902, and the number of the inert gas nozzles 906 is consistent with the number of inert gas inlets. The inert gas purge system 9 also includes an outlet gas collecting pipe 907 arranged on the upper vertebral body 802, and the outlet gas collecting pipe 907 is connected to the explosion-proof incinerator 9010, the dust collector 9011 and the induced draft fan 9012 in sequence through the outlet main pipe 908; the inner wall of the outlet gas collecting pipe 907 is provided with a plurality of purge gas outlet branch pipes 909, and the number of the purge gas outlet branch pipes 909 is consistent with the number of inert gas outlets.

[0073] The high temperature resistant split gate valve 10 needs to bear the weight and impact of coke, and is required to be resistant to high temperature, wear-resistant, and non-deformable. Specifically, it includes a wear-resistant high temperature hard alloy valve seat 1001 and a cooling gate plate 1002 on the wear-resistant high temperature hard alloy valve seat 1001. The cooling gate plate 1002 is a two-piece split gate plate, and the material of the gate plate is 310S. Each gate plate is a cast valve plate with a water-cooled cavity 1003 structure that is cast as a whole. The gate plate wall thickness is 30 mm, and the interior is a water-cooled cavity 1003. The upper and lower surfaces of the water-cooled cavity 1003 are correspondingly provided with reinforcing ribs 1004 to improve the mechanical strength. The advantage is that it can withstand the weight of coke without deformation, and under water cooling conditions, the surface temperature of the valve plate is lower than 200°C, which is far lower than the softening temperature of 310S material at 800°C, greatly improving the service life of the gate plate. The surface of the cooling gate plate 1002 is welded with a nickel-based alloy tungsten carbide composite coating to play a wear-resistant role. The cooling gate 1002 is opened and closed by an electric hydraulic cylinder, with a fast movement speed and a precisely controllable movement stroke.

[0074] The high temperature resistant sealing valve 11 comprises a valve cylinder 1101, and a refractory lining 1102 is arranged inside the valve cylinder 1101; a water-cooled sealing jacket flange 1103 is fixed on the top of the valve cylinder 1101, and a lower flange III 1104 is fixed on the bottom; a water-cooled rotary sealing valve plate 1105 is fixed on the lower surface of the water-cooled sealing jacket flange 1103 through a rotating shaft, and the rotating shaft is driven by a rotating motor to rotate, thereby realizing the rotation of the water-cooled rotary sealing valve plate 1105, so as to realize the opening and closing of the high temperature resistant sealing valve 11. When the rotating shaft drives the water-cooled rotary sealing valve plate 1105 to be at 0°, that is, in a horizontal state, it enters a closed state, and the water-cooled rotary sealing valve plate 1105 is closed with the lower edge of the water-cooled sealing jacket flange, preventing the gas in the dry coke quenching cone from moving upward, and also preventing external gas from entering the dry coke quenching cone; when the rotating shaft drives the water-cooled rotary sealing valve plate 1105 to be at 90°, it is in an open state. The high temperature resistant split gate valve 10 is opened, and the coke inside the top high temperature storage tank 8 falls into the dry coke quenching pre-storage chamber.

[0075] The high temperature resistant material distributor 12 is located at the lower part of the high temperature resistant lower sealing valve 11, and includes a conical distributor 1201 and a supporting water beam 1202 at its bottom. The conical distributor 1201 is conical in shape and is integrally cast with high temperature resistant alloy steel. The surface of the conical distributor 1201 is inlaid with a high temperature resistant hard alloy lining plate, and a water cooling cavity 1203 is arranged inside, which is connected to the supporting water beam to reduce the temperature and will not be damaged under the impact of high temperature coke. The high temperature resistant hard alloy lining plate is formed by sintering metal tungsten powder, metal cobalt powder, nickel powder and tungsten carbide powder in one step, and its shape fits the upper surface of the conical distributor 1201. There are 4 fixed cylinders on the surface of the conical distributor 1201, and the high temperature resistant alloy lining plate has reserved holes, which can be docked at one time and fixed by welding with nickel-based high temperature welding wire.

[0076] The actual operation steps of the above-mentioned dry quenching explosion-proof coke loading device are as follows:

[0077] The first step is a fully closed state, including closing the high temperature resistant lower sealing valve 11, closing the high temperature resistant split gate valve 10, closing the high temperature resistant first sealing valve 7, and closing the top water seal cover 1.

[0078] In the second step, the inert gas is used to purge the top high-temperature storage tank 8. The inert gas enters the storage tank, takes away the hydrogen and other flammable gases, and burns them in the explosion-proof incinerator 9010. After the exhaust gas passes through the dust collector 9011, it is pressurized by the induced draft fan 9012 and transported to the coke chimney for discharge.

[0079] In the third step, the top high-temperature storage tank 8 is loaded with red coke. The hoist lifts the coke tank to the top of the dry quenching furnace, the top water seal cover 1 is opened, the first high-temperature sealing valve 7 is opened, and the coke falls into the top high-temperature storage tank 8. Then the first high-temperature sealing valve 7 is closed, the coke tank is taken away by the hoist, and then the water seal cover 1 is closed. The top high-temperature storage tank 8 is separated from the air by the water seal cover 1 and the first high-temperature sealing valve 7, and the air will not enter the top high-temperature storage tank 8. The top high-temperature storage tank 8 is in a safe state.

[0080] The fourth step is to drop the coke into the dry quenching furnace. Open the high temperature resistant lower sealing valve 11, then open the high temperature resistant split gate valve 10, and the high temperature coke drops and evenly falls into the dry quenching furnace through the high temperature resistant material distributor 12. The coke in the top high temperature storage tank 8 can all fall into the dry quenching furnace or part of it can fall into the dry quenching furnace, which can be flexibly operated according to the actual situation.

[0081] The fifth step is to first close the high temperature resistant split gate valve 10, and then close the high temperature resistant lower sealing valve 11. Re-enter the fully closed state.

[0082] The benefits of this practical application are:

[0083] The top high-temperature storage tank 8 is a loading buffer for high-temperature coke. When the dry coke quenching cone is in a positive pressure state, the high-temperature resistant split gate valve 10 and the high-temperature resistant lower sealing valve 11 are in a closed state. The top high-temperature storage tank 8 is purged with inert gas before loading. At this time, the high-temperature resistant first sealing valve 7 and the water seal cover 1 are opened, and the combustible gas of the dry coke quenching cone will not enter the top high-temperature storage tank 8, nor will it form a fire column or explode. After loading the coke, the high-temperature resistant first sealing valve 7 and the water seal cover 1 are closed, the high-temperature resistant lower sealing valve 11 is opened, the high-temperature resistant split gate valve 10 is opened, and the coke falls into the dry coke quenching. Even if a part of the combustible gas enters the top high-temperature storage tank 8, all the combustible gas will be taken away and burned in the next inert gas purging step. The top high-temperature storage tank 8 will be filled with inert gas.

[0084] When the pressure of the CDQ cone is lower than -100Pa, the high temperature resistant split gate valve 10 and the high temperature resistant lower sealing valve 11 are in the closed state, the water seal cover 1 and the high temperature resistant first sealing valve 7 are opened, the coke enters the top high temperature storage tank 8, and the air will not enter the CDQ cone to cause an explosion. The top high temperature storage tank 8 is purged with inert gas, and the top high temperature storage tank 8 will not explode.

[0085] Regardless of whether the CDQ cone is under positive pressure or negative pressure, the installation of the above device can prevent fire and cone explosion.

Claims

1. A device for explosion-proof coke loading for dry coke quenching, characterized in that: It includes a top water seal cover, a high-temperature resistant first sealing valve, a top high-temperature storage tank, a high-temperature resistant double-opening gate valve, a high-temperature resistant lower sealing valve and a high-temperature resistant material distributor arranged from top to bottom. The high-temperature resistant lower sealing valve is fixed on the top of the cone of the existing dry quenching furnace, and an inert gas purge system is arranged on the top high-temperature storage tank.

2. The device for explosion-proof loading of dry coke quenching according to claim 1, characterized in that: The water seal cover on the top is a CDQ water seal structure, the water seal cover adopts a circular structure with a diameter of 3000 mm to 4000 mm; or the water seal cover adopts a square structure with a side length of 3000 mm to 4000 mm.

3. The device for explosion-proof coke loading by dry quenching according to claim 1, characterized in that: The high-temperature resistant first sealing valve is located below the water seal cover, and comprises an upper flange I, a lower flange I and a high-temperature resistant lining fixed between the upper flange I and the lower flange I, and the outer side of the high-temperature resistant lining is a metal shell; bearings are provided at both ends of the cooling valve plate, which are fixed on the valve plate bearing seat; a high-temperature resistant and wear-resistant coating is coated on the entire outer surface of the high-temperature resistant first sealing valve; the cooling valve plate is precision cast as a whole using 310S stainless steel cast steel, formed in one step, and has an elliptical cross-section; a cooling channel cavity is provided inside the cooling valve plate, one end of the cavity is a cooling medium inlet, and the other end is a cooling medium outlet; the three valve plates are in the form of shutter structures, and the rotation drive of the valve plates is driven by a motor.

4. The device for explosion-proof loading of coke by dry quenching according to claim 3, characterized in that: The high temperature resistant first sealing valve is a circular structure or a square structure. The high temperature resistant first sealing valve is a circular structure, and the cooling valve plate is divided into three valve plates: left, middle and right. The arc of the valve plate fits the high temperature resistant lining; The high temperature resistant first sealing valve has a square structure, and the cooling valve plate is divided into three rectangular valve plates of the same size: left, middle and right, which are fitted with the high temperature resistant lining.

5. The device for explosion-proof coke loading after dry quenching according to claim 3, characterized in that: The high temperature and wear resistant coating is a tungsten carbide nickel-based alloy high temperature coating or a high temperature flame sprayed corundum coating.

6. The device for explosion-proof coke loading by dry quenching according to claim 1, characterized in that: The top high-temperature storage tank includes an upper flange II, an upper cone, a cylinder, a lower funnel, and a lower flange II arranged from top to bottom; the upper cone is provided with an inert gas outlet, and the lower funnel is provided with an inert gas inlet; the top high-temperature storage tank is respectively composed of a steel shell, a refractory fiberboard layer, a castable layer, and a refractory brick layer from outside to inside; the castable layer is cast with high-temperature resistant corundum mullite, and the refractory brick layer is made of silicon carbide mullite brick or Sialon combined with silicon carbide brick.

7. The device for explosion-proof loading of coke by dry quenching according to claim 6, characterized in that: The inert gas purge system includes an inert gas inlet pipeline arranged on the funnel, an air intake collecting pipe is arranged at the gas inlet end of the inert gas inlet pipeline, the air intake collecting pipe is connected to the air intake main pipe, and a valve is arranged between the air intake main pipe and the inert gas storage tank as an inert gas purge inlet; a plurality of inert gas nozzles are arranged on the inner wall of the air intake collecting pipe, and the number of the inert gas nozzles is consistent with the number of inert gas inlets; the inert gas purge system also includes a purge gas outlet branch pipe arranged on the upper vertebral body, and the number of the purge gas outlet branch pipes is consistent with the number of inert gas outlets; an outlet collecting pipe is arranged at the gas outlet end of the purge gas outlet branch pipe, and the outlet collecting pipe is connected to the explosion-proof incinerator, the dust collector and the induced draft fan in sequence through the outlet main pipe.

8. The device for explosion-proof coke loading by dry quenching according to claim 1, characterized in that: The high-temperature resistant split gate valve comprises a wear-resistant high-temperature hard alloy valve seat and a cooling gate plate on the wear-resistant high-temperature hard alloy valve seat. The cooling gate plate is two split gate plates, and the material of the gate plate is 310S; each gate plate is a cast valve plate with a water-cooled cavity structure that is integrally cast, and the interior is a water-cooled cavity; reinforcing ribs are correspondingly arranged on the upper and lower surfaces of the water-cooled cavity; a nickel-based alloy tungsten carbide composite coating is welded on the surface of the cooling gate plate; the opening and closing of the cooling gate plate is driven by an electric hydraulic cylinder.

9. The device for explosion-proof coke loading after dry quenching according to claim 1, characterized in that: The high-temperature resistant lower sealing valve includes a valve cylinder, and a refractory lining is arranged inside the valve cylinder; a water-cooled sealing jacket flange is fixed on the top of the valve cylinder, and a lower flange III is fixed on the bottom, and a water-cooled rotary sealing valve plate is fixed to the lower surface of the water-cooled sealing jacket flange through a rotating shaft, and the rotating shaft is driven by a rotating motor to rotate; when the rotating shaft drives the water-cooled rotary sealing valve plate to be at 0°, that is, in a horizontal state, it enters a closed state, and the water-cooled rotary sealing valve plate is closed with the lower edge of the water-cooled sealing jacket flange; when the rotating shaft drives the water-cooled rotary sealing valve plate to be at 90°, it is in an open state.

10. The device for explosion-proof coke loading by dry quenching according to claim 1, characterized in that: The high-temperature resistant material distributor is located at the lower part of the high-temperature resistant lower sealing valve, and includes a conical distributor and a supporting water beam at its bottom; the conical distributor is conical in shape and is integrally cast with high-temperature resistant alloy steel; the surface of the conical distributor is inlaid with a high-temperature resistant hard alloy lining plate, and a water-cooling cavity is arranged inside, which is communicated with the supporting water beam and can be cooled by circulating cooling water; the shape of the high-temperature resistant hard alloy lining plate fits the upper surface of the conical distributor; there are 4 fixed cylinders on the surface of the conical distributor, and the high-temperature resistant alloy lining plate has reserved holes, which can be connected at one time and fixed by welding with nickel-based high-temperature welding wire.

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