CN216837841U

CN216837841U - Device for preparing synthetic coal gas by dry quenching

Info

Publication number: CN216837841U
Application number: CN202220781582.1U
Authority: CN
Inventors: 石欣; 杜汉双
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-06-28
Anticipated expiration: 2032-04-06

Abstract

A device for preparing synthetic gas by dry quenching, which belongs to the technical field of energy conservation in chemical production. The device for preparing the synthetic coal gas by dry quenching comprises a pre-storing chamber, a red coke gasification reaction section unit and a dry quenching unit, wherein the pre-storing chamber is provided with a sealed coke-sealing unit, the red coke gasification reaction section unit comprises two red coke gasification reaction towers, the pre-storing chamber is communicated with the two red coke gasification reaction towers through a left-side blanking chute and a right-side blanking chute, the dry quenching unit comprises a quenching chamber, the quenching chamber is communicated with the bottom ends of the two red coke gasification reaction towers through a left-side red coke chute and a right-side red coke chute, and the left-side blanking chute, the right-side blanking chute, the red coke gasification reaction towers, the left-side red coke chute and the right-side red coke chute are all provided with gas injection structures. The device for preparing the synthetic gas by dry quenching can complete two functions of red coke gas making and red coke waste heat recovery, and can solve the problems of red coke charging fire column, waste heat recovery and series gas making and dry quenching processes.

Description

Device for preparing synthetic coal gas by dry quenching

Technical Field

The utility model relates to the technical field of chemical production and energy conservation, in particular to a device for preparing synthetic coal gas by dry quenching.

Background

The coking industry produces chemical raw materials such as methanol, ethanol and the like by using coke oven gas, and the serious problem of gas shortage is faced, and synthetic gas needs to be supplemented to meet the capacity. The main components of the synthetic coal gas are CO and H₂. In the production process of a coking plant, a large amount of coke powder and semi-coke powder can be generated to become solid waste, the selling price is at least 50 percent lower than that of coke, and the profit of a coking enterprise is seriously influenced. The coke-oven plant needs to increase the product quantity of the synthetic gas, improve the productivity of chemical products such as methanol, ethanol and the like, and improve the economic benefit. However, in the traditional synthetic gas furnace, the gasification reaction of the coke is used for gas production, the coke is charged at normal temperature, oxygen is consumed to burn the coke and heat the coke, the chemical reaction can be carried out, the burning loss of the coke is high, and energy waste exists.

Qitai river coke plant tries to load red coke, coke powder and semi-coke powder into a kiln and enter a prestoring room. However, in the test production process, when charging, the water seal cover is opened, and the coal gas and the coke powder, the blue carbon powder and the coal gas in the pre-storage chamber escape together and are combusted with oxygen in the air to form fire columns, so that the charging cannot be carried out. The coke gas making is urgently needed to solve the difficult problems of the red coke charging process and equipment.

In addition, after the coke is gasified, the temperature of the coke needs to be reduced from 1000 ℃ to 200 ℃, the high-temperature heat energy of the coke is recycled, the process difficulty is increased, and the technical problem of series connection of gas making and dry quenching processes needs to be solved.

In summary, a process and a device capable of loading high-temperature red coke and converting coke powder, blue carbon powder and a part of coke into synthetic gas are urgently needed by a coke plant, and gas making and dry quenching processes are completed in series, so that the yield of the synthetic gas is increased, the utilization of the waste heat of dry quenching is realized, the integral equipment level of the coke plant is improved, and the economic benefit of the coke plant is improved.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that prior art exists, the utility model provides a device of synthetic coal gas is made to dry coke quenching is an industrial furnace that can accomplish two kinds of functions of red burnt gas making and red burnt waste heat recovery, can solve red burnt charging fire column problem, waste heat recovery problem and the problem of making gas and dry coke quenching technology series connection.

In order to realize the purpose, the technical scheme of the utility model is that:

a device for preparing synthetic coal gas by dry quenching comprises a pre-storage chamber, a red coke gasification reaction section unit and a dry quenching unit which are sequentially communicated;

the top of the pre-storage chamber is provided with a sealed coke-filling unit which is used for preventing gas and particles in the pre-storage chamber from leaking and burning to form a fire column when coke is filled;

the red coke gasification reaction section unit comprises two red coke gasification reaction towers arranged at two sides below a pre-storage chamber, the pre-storage chamber is respectively communicated with the upper parts of the side surfaces of the two red coke gasification reaction towers through a left blanking chute and a right blanking chute, and coke in the pre-storage chamber respectively enters the two red coke gasification reaction towers through the left blanking chute and the right blanking chute;

the coke dry quenching unit comprises a coke quenching chamber, the coke quenching chamber is respectively communicated with the bottom ends of the two red coke gasification reaction towers through a left red coke chute and a right red coke chute, and red coke in the two red coke gasification reaction towers respectively enters the coke quenching chamber through the left red coke chute and the right red coke chute;

and the left-side feeding chute, the right-side feeding chute, the red coke gasification reaction tower, the left-side red coke chute and the right-side red coke chute are provided with gas injection structures for injecting gas.

Further, the prestoring chamber comprises a first cone, a storage chamber and a second cone which are sequentially communicated; the inside fire-resistant barricade that is provided with of second centrum, fire-resistant barricade falls into left side part and right side part with the second centrum, the left side part is through the top intercommunication of left side unloading interface with left side unloading chute, the right side part is through the top intercommunication of right side unloading interface with right side unloading chute.

Furthermore, the sealed coke-sealing unit comprises a water-sealing furnace cover, a central bell and two rotary turning plates, wherein the two rotary turning plates are arranged on two sides of the central bell;

the water seal furnace cover is arranged on the outer side of the top of the first cone;

the rotary turning plate comprises a support fixedly connected with the top of the first cone, and the support is connected with the rotary water beam through a bearing; the rotating water beam is connected with a rotating motor through a transmission structure, and the rotating motor drives the rotating water beam to rotate; the side surface of the rotating water beam is connected with a fire-resistant shell, and a water-cooled wall is arranged in the fire-resistant shell; a cooling water pipe communicated with the water-cooled wall is arranged in the rotating water beam, and rotary valves are arranged at the water inlet end and the water outlet end of the cooling water pipe;

the central bell comprises a water beam connected with the top of the first cone, a sharp cap is arranged at the top of the water beam, the bottom of the water beam is connected with the tank body, and the side face of the tank body is connected with one end, far away from the rotating water beam, of the fireproof shell in a closed mode.

Furthermore, the left blanking chute and the right blanking chute have the same structure and are of quadrilateral cone structures, and the taper angle of each quadrilateral cone structure is larger than 5 degrees, so that the cross sectional area of the lower part of the blanking chute is larger than that of the upper part of the blanking chute, and red coke cannot be accumulated and blocked; the inclination angle of the bottom plates of the left blanking chute and the right blanking chute is greater than 45 degrees, and the left blanking chute and the right blanking chute are used for ensuring the red coke to normally fall.

Furthermore, the red coke gasification reaction tower comprises a synthetic gas collecting pipe, an upper conical section, an upper tower body, a lower conical section and a lower tower body which are sequentially communicated, and the red coke gasification reaction tower is used for reacting coke powder, semi-coke powder and a gasifying agent to generate synthetic gas.

Further, the structure of left side red burnt chute is the same with the structure of right side red burnt chute, is the quadrangle centrum structure, the inclination of the bottom plate of left side red burnt chute and right side red burnt chute all is greater than 45.

Further, the quenching chamber comprises a nitrogen gas collecting pipe, an upper bell mouth, a cylinder and a lower bell mouth which are sequentially communicated, a nitrogen gas hood communicated with a nitrogen gas pipeline is arranged inside the quenching chamber, and a vibrating feeder and a rotary sealing valve are connected below the lower bell mouth for discharging cooled coke.

Further, the gas injection structure comprises a gas side-blown pressure regulating system unit arranged on the left blanking chute and the right blanking chute, a gasifying agent injection unit arranged on the red coke gasification reaction tower and a nitrogen side-blown unit arranged on the left red coke chute and the right red coke chute;

the coal gas side-blowing pressure regulating system unit comprises a bottom plate and a coal gas nozzle arranged on the side surface of the left blanking chute, and a bottom plate and a coal gas nozzle arranged on the side surface of the right blanking chute; the coal gas nozzles are correspondingly communicated with grate bricks in the left blanking chute and the right blanking chute; the gas nozzle is communicated with an external gas pipeline, and the gas pipeline is provided with a gas pressure regulating valve for regulating gas pressure;

the gasification agent injection unit comprises a central injection port arranged at the bottom of the red coke gasification reaction tower and peripheral injection ports arranged below the side wall of the red coke gasification reaction tower, and the central injection port and the peripheral injection ports are both communicated with a gasification agent pipeline;

the nitrogen side-blowing unit comprises a nitrogen nozzle arranged on the bottom plate and the side surface of the left red coke chute, and a nitrogen nozzle arranged on the bottom plate and the side surface of the right red coke chute; the nitrogen nozzles are correspondingly communicated with the grate bricks in the left red coke chute and the right red coke chute; the nitrogen nozzle is communicated with a nitrogen pipeline.

The utility model has the advantages that:

1) the utility model discloses a device of synthetic coal gas is made to dry coke quenching makes coke breeze, blue charcoal powder and gasification agent turn into the higher synthetic coal gas of economic value for important industrial chemicals such as production methyl alcohol, ethanol promote economic benefits.

2) The utility model discloses a when red burnt, fine coke and blue charcoal powder dress burnt have been solved to sealed dress burnt unit, the excessive accident that forms the fire column of coal gas dust makes the red burnt material go on smoothly, has improved the utilization efficiency of the energy through red burnt charging by a wide margin.

3) The utility model discloses a coal gas side-blown pressure regulating system unit is to side jetting coal gas, prevents to gush on the synthetic coal gas and enters the room of prestoring, prevents to prestore the room pressure and risees, reduces the outer row of coal gas and burns, and synthetic coal gas gets into synthetic coal gas trunk line, safe and reliable through synthetic coal gas collecting pipe.

4) The coke dry quenching unit of the utility model is different from the coke dry quenching section of the middle-solar-coupler and the middle-smelting coke design-resistant, adopts the air outlet mode of the top nitrogen gas collecting pipe, does not need an annular air channel, and has low equipment cost, long service life and smaller nitrogen gas flow resistance; the nitrogen side-blowing unit arranged on the red coke chute forms a nitrogen gas curtain to prevent nitrogen from entering the red coke gasification reaction section unit and from being mixed into synthetic coal gas, and the main component of the coal gas is high.

5) The utility model discloses a coking can be as required, nimble adjustment, and the reaction volume of red coke can be realized through the injection volume of gasification agent: when the chemical products have good economic benefit, more gasifying agents can be sprayed in to produce more synthetic coal gas; when the economic benefit of the coke is good, less gasifying agent can be sprayed, and more coke is reserved; the production flexibility is high, and the economic benefit of the coking plant is greatly improved.

6) The utility model discloses a device of synthetic coal gas is made to dry coke quenching has realized two kinds of functions in an organic whole of synthetic coal gas, the red burnt dry coke quenching, belongs to the internal industrial furnace type of initiating, has improved internal design, the manufacturing level of equipping.

Additional features and advantages of the invention will be set forth in part in the detailed description which follows.

Drawings

FIG. 1 is a schematic structural diagram of a device for preparing synthetic gas by dry quenching provided by an embodiment of the invention;

fig. 2 is a schematic front view of a rotary flap provided in an embodiment of the present invention;

FIG. 3 is a schematic side view of a rotating water beam and a refractory casing according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a central bell according to an embodiment of the present invention;

fig. 5 is a schematic structural view of a left blanking chute provided in the embodiment of the present invention;

fig. 6 is a schematic structural diagram of a left-side red coke chute provided by the embodiment of the present invention;

fig. 7 is a schematic structural diagram of a waste heat recovery unit provided by an embodiment of the present invention.

Reference numerals in the drawings of the specification include:

1-a pre-storage chamber, 2-a red coke gasification reaction tower, 3-a left blanking chute, 4-a right blanking chute, 5-a left red coke chute, 6-a right red coke chute, 7-a first cone, 8-a storage chamber, 9-a second cone, 10-a fire-resistant retaining wall, 11-a left blanking interface, 12-a right blanking interface, 13-a blow-off gas outlet, 14-a blow-off gas pipeline, 15-a blow-off gas combustion torch, 16-a water-sealed furnace cover, 17-a central bell, 18-a rotary turning plate, 19-a support, 20-a rotating water beam, 21-a bearing, 22-a rotating motor, 23-a gear, 24-a transmission chain, 25-a fire-resistant shell, 26-a water-cooling wall, 27-a rotating valve and 28-a water beam, 29-sharp cap, 30-tank body, 31-synthetic gas collecting pipe, 32-upper cone joint, 33-upper tower body, 34-lower cone joint, 35-lower tower body, 36-cyclone dust collector, 37-waste heat boiler, 38-bag dust collector, 39-main gas pipe, 40-nitrogen collecting pipe, 41-upper bell mouth, 42-cylinder, 43-lower bell mouth, 44-nitrogen hood, 45-nitrogen pipeline, 46-vibration feeder, 47-rotary sealing valve, 48-gas nozzle, 49-grate brick, 50-gasifying agent injection unit, 51-peripheral injection port, 52-central injection port, 53-gasifying agent pipeline and 54-nitrogen nozzle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "vertical", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, mechanically or electrically connected, or may be connected between two elements through an intermediate medium, or may be directly connected or indirectly connected, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

In order to solve the problems in the prior art, as shown in fig. 1 to 7, the utility model provides a device for preparing synthetic gas by dry quenching, which comprises a prestore chamber 1, a red coke gasification reaction section unit and a dry quenching unit which are sequentially communicated;

the top of the pre-storage chamber 1 is provided with a sealed coke-filling unit which is used for preventing gas and particles in the pre-storage chamber 1 from leaking and burning to form a fire column when coke is filled;

the red coke gasification reaction section unit comprises two red coke gasification reaction towers 2 arranged at two sides below the pre-storage chamber 1, the pre-storage chamber 1 is respectively communicated with the upper parts of the side surfaces of the two red coke gasification reaction towers 2 through a left blanking chute 3 and a right blanking chute 4, so that coke in the pre-storage chamber 1 respectively enters the two red coke gasification reaction towers 2 through the left blanking chute 3 and the right blanking chute 4;

the coke dry quenching unit comprises a coke quenching chamber, the coke quenching chamber is respectively communicated with the bottom ends of the two red coke gasification reaction towers 2 through a left red coke chute 5 and a right red coke chute 6, so that red coke in the two red coke gasification reaction towers 2 respectively enters the coke quenching chamber through the left red coke chute 5 and the right red coke chute 6;

the left blanking chute 3, the right blanking chute 4, the red coke gasification reaction tower 2, the left red coke chute 5 and the right red coke chute 6 are all provided with gas injection structures for injecting gas.

As shown in fig. 1, the pre-storage chamber 1 comprises a first cone 7, a storage chamber 8 and a second cone 9 which are communicated in sequence; a fire-resistant retaining wall 10 is arranged in the second cone 9, the fire-resistant retaining wall 10 divides the second cone 9 into a left part and a right part, the left part is communicated with the top end of the left blanking chute 3 through a left blanking port 11, and the right part is communicated with the top end of the right blanking chute 4 through a right blanking port 12.

In this embodiment, the first cone 7, the storage chamber 8 and the second cone 9 are sequentially arranged from top to bottom, and the left blanking port 11 and the right blanking port 12 are arranged below the second cone 9 and are respectively used for being communicated with the left blanking chute 3 and the right blanking chute 4. The outer shell of the prestore chamber 1 is made of steel materials and is lined with refractory bricks. The storage chamber 8 is in a cylindrical structure, the inner diameter of the storage chamber is 6-8 m, the height of the storage chamber is 4-8 m, and the outer shell of the storage chamber 8 is made of steel materials and is lined with refractory materials. The lower opening of the second cone 9 is square, a refractory retaining wall 10 is built inside the second cone 9, and the refractory retaining wall 10 divides the second cone 9 into a left part and a right part. The left side unloading interface 11 and the right side unloading interface 12 are both square, the shell is welded by steel plates, and wear-resistant and high-temperature-resistant corundum bricks are laid inside and are respectively used for being butted with the left side unloading chute 3 and the right side unloading chute 4.

In order to ensure the use safety, the first cone 7 is provided with an electronic pressure gauge for detecting the pressure of the gas in the pre-storage chamber 1 and a gas diffusion combustion device for leading out and combusting the gas in the pre-storage chamber 1, the gas diffusion combustion device comprises a diffused gas outlet 13, a diffused gas pipeline 14 and a diffused gas combustion torch 15 which are sequentially connected, and when the gas diffusion combustion device is actually used, the electronic pressure gauge and the gas diffusion combustion device are installed on the first cone 7 and can be observed and controlled manually; the automatic control can also be realized by adopting the instrument automation in the prior art, the instrument control system belongs to mature equipment, is widely used in the field of industrial gas diffusion combustion, and directly adopts the prior mature technology. Specifically, if the gas pressure in the pre-storage chamber 1 is 0-50 Pa, the gas diffusion combustion device does not work; if the pressure of the coal gas in the prestoring chamber 1 is higher than 50Pa, the coal gas diffusion combustion device is started to lead out and combust the coal gas so as to ensure that the pressure of the coal gas in the prestoring chamber 1 is within the range of 0-50 Pa, and the diffusion coal gas combustion torch 15 adopts the steel coking coal gas storage tank combustion torch, and belongs to mature industrial products.

As shown in fig. 1 to 3, the sealed coke-sealing unit comprises a water-sealing furnace cover 16, a central bell 17 and two rotary turning plates 18, wherein the two rotary turning plates 18 are arranged on two sides of the central bell 17;

the water seal furnace cover 16 is arranged on the outer side of the top of the first cone 7;

the rotary turnover plate 18 comprises a support 19 fixedly connected with the top of the first cone 7, and the support 19 is connected with a rotary water beam 20 through a bearing 21; the rotating water beam 20 is connected with a rotating motor 22 through a transmission structure, and the rotating motor 22 drives the rotating water beam 20 to rotate; the side surface of the rotating water beam 20 is connected with a fire-resistant shell 25, and a water-cooled wall 26 is arranged in the fire-resistant shell 25; a cooling water pipe communicated with the water wall 26 is arranged in the rotary water beam 20, and the water inlet end and the water outlet end of the cooling water pipe are both provided with rotary valves 27;

the central bell 17 comprises a water beam 28 connected with the top of the first cone 7, the top of the water beam 28 is provided with a sharp cap 29, the bottom of the water beam 28 is connected with a groove body 30, and the side surface of the groove body 30 is in closed connection with one end of the fire-resistant shell 25 far away from the rotating water beam 20.

In this embodiment, the water-sealed furnace cover 16 is a dry quenching water-sealed furnace cover 16 produced by heavy industry and is matched with an electric hydraulic driving device. Gears 23 are arranged at the output end of a rotating motor 22 of the rotating turning plate 18 and the outer part of the rotating water beam 20, transmission chains 24 are sleeved outside the two gears 23, and the rotating motor 22 drives the rotating water beam 20 to rotate so as to close and open the side surface of the groove body 30 and the end part of the fireproof shell 25; the water-cooling wall 26 structure setting of rotatory board 18 that turns over can guarantee that rotatory board 18 turns over under the high temperature condition, can obtain sufficient cooling, guarantee that equipment does not warp, long-lived, it is concrete, the outside cooling water gets into condenser tube's the end of intaking through the rotary valve 27 that rotates water beam 20 one end, through water-cooling wall 26 again, condenser tube's play water end, the rotary valve 27 of the rotation water beam 20 other end discharges, when realizing into water and play water through rotary valve 27, water pipe and rotation water beam 20 swivelling joint. The water beam 28 is a cuboid water beam 28, and the water beam 28 is matched with an external cooling water circulation structure, so that the water beam 28 always keeps one end inputting cooling water and the other end discharging cooling water; the tip cap 29 serves to improve the wear resistance of the central bell 17. When coke is filled in the coke tank, before the water seal furnace cover 16 is opened, the rotary turning plates 18 on the left side and the right side are closed, namely the rotary turning plates 18 are closed with the groove body 30 of the central bell 17, and the prestoring chamber 1 is closed, so that coal gas, coke powder and semi-coke powder dust are blocked in the prestoring chamber 1 and cannot escape out of the furnace body, and flame can be prevented; when the coke tank falls down and the loading device is butted with the prestoring chamber 1, the rotary turning plates 18 on the left side and the right side rotate downwards and are opened, and red coke, semi-coke powder and coke powder in the coke tank fall down into the prestoring chamber 1 for loading coke; after coke charging is finished, the left and right rotary turning plates 18 rotate upwards to be closed with the groove body 30 of the central bell 17 to prevent gas and dust from upwelling, the coke tank is lifted by the lifter to be closed, and then the water seal furnace cover 16 is closed. In practical use, the utility model discloses need supporting construction taiyuan heavy industry large-scale hoisting lifting machine, steel construction derrick, big company's heavy mine coke drum, big company's heavy mine walk to go to pack into the device for red hot coke, blue carbon powder and the fine coke of packing into, these equipment belong to ripe industrial equipment, direct purchase use.

As shown in fig. 5, the left blanking chute 3 and the right blanking chute 4 have the same structure and are both quadrilateral cone structures, and the taper angle of the quadrilateral cone structures is larger than 5 degrees, so that the cross-sectional area of the lower part of the blanking chute is larger than that of the upper part, and red coke cannot be accumulated to block materials; the inclination angle of the bottom plates of the left blanking chute 3 and the right blanking chute 4 is more than 45 degrees, and the red coke falling is ensured to normally fall. In this embodiment, the shells of the left blanking chute 3 and the right blanking chute 4 are welded by steel plates, and refractory materials are paved inside the shells.

As shown in fig. 1, the red coke gasification reaction tower 2 comprises a synthetic gas collecting pipe 31, an upper conical section 32, an upper tower body 33, a lower conical section 34 and a lower tower body 35 which are sequentially communicated, and the red coke gasification reaction tower 2 is used for reacting coke powder, semi coke powder and a gasifying agent to generate synthetic gas.

In this embodiment, the tower body shell of the red coke gasification reaction tower 2 is a heat-resistant steel shell, the lining is made of refractory bricks, the upper tower body 33 and the lower tower body 35 are of a cylindrical structure or a cuboid structure, and the synthetic gas collecting pipe 31, the upper conical section 32, the upper tower body 33, the lower conical section 34 and the lower tower body 35 are sequentially arranged from top to bottom to form a cavity for the reaction of coke powder, blue carbon powder and a gasifying agent to generate synthetic gas. In practical use, as shown in fig. 7, the synthetic gas collecting pipe 31 is matched with a waste heat recovery unit, the waste heat recovery unit comprises a cyclone dust collector 36, a waste heat boiler 37 and a bag-type dust collector 38, the synthetic gas collecting pipe 31 is sequentially connected with the cyclone dust collector 36, the waste heat boiler 37 and the bag-type dust collector 38 and is used for purifying dust in synthetic gas and reducing the temperature of the gas to below 50 ℃, the synthetic gas finally converges into a gas main pipe 39, the cyclone dust collector 36, the waste heat boiler 37 and the bag-type dust collector 38 are matched with the red coke gasification reaction tower 2 to build, and the synthetic gas in the synthetic gas collecting pipes 31 of the two red coke gasification reaction towers 2 converges and then enters the cyclone dust collector 36 together.

As shown in fig. 6, the left red coke chute 5 and the right red coke chute 6 have the same structure and are both quadrilateral cone structures, and the inclination angles of the bottom plates of the left red coke chute 5 and the right red coke chute 6 are both greater than 45 °.

In this embodiment, the shells of the left red coke chute 5 and the right red coke chute 6 are made of alloy steel plates, the lining is made of refractory materials, the upper ends of the left red coke chute 5 and the right red coke chute 6 are communicated with the bottom end of the red coke gasification reaction tower 2, and the lower ends of the left red coke chute 5 and the right red coke chute 6 are communicated with the side wall of the quenching chamber cylinder 42.

As shown in FIG. 1, the quenching chamber comprises a nitrogen gas collecting pipe 40, an upper bell mouth 41, a cylinder 42 and a lower bell mouth 43 which are communicated in sequence, a nitrogen gas hood 44 communicated with a nitrogen gas pipeline 45 is arranged in the quenching chamber, and a vibration feeder 46 and a rotary sealing valve 47 are connected below the lower bell mouth 43 and used for discharging cooled coke.

In the embodiment, the nitrogen gas collecting pipe 40, the upper bell mouth 41, the cylinder 42 and the lower bell mouth 43 are sequentially arranged from top to bottom, the cylinder 42 is respectively communicated with the red coke chute 5 on the left side and the red coke chute 6 on the right side, the red coke performs countercurrent heat exchange with nitrogen in a coke quenching chamber, the red coke is cooled from 1000 ℃ to 230 ℃, the nitrogen is heated from 130 ℃ to 900 ℃, the cooled coke is discharged through the vibration blanking device 46 and the rotary sealing valve 47, and the vibration blanking device 46 and the rotary sealing valve 47 adopt mature industrial products of Taiyuan heavy industry or Qin smelting heavy industry. The coke quenching chamber, the nitrogen air cap 44, the nitrogen pipeline 45, the vibration feeder 46 and the rotary sealing valve 47 jointly form a coke dry quenching unit, the coke dry quenching unit cools coke through circulating nitrogen, and the equipment structure is different from that of large-scale coke dry quenching: in the traditional dry quenching, the material is discharged from the right upper part, and nitrogen flows out from an annular air duct on the side surface; and the utility model discloses a red burnt is the side direction unloading, and nitrogen gas flows from quenching chamber upper portion, and nitrogen gas flows more smoothly, the utility model discloses a side direction unloading, nitrogen gas flow from quenching chamber upper portion, can realize that red burnt gas making and red burnt refrigerated process equipment establish ties, solve the difficult problem of equipment overall arrangement.

As shown in fig. 1, 5 and 6, the gas injection structure comprises a gas side-blown pressure regulating system unit arranged on the left blanking chute 3 and the right blanking chute 4, a gasifying agent injection unit 50 arranged on the red coke gasification reaction tower 2, and a nitrogen side-blown unit arranged on the left red coke chute 5 and the right red coke chute 6;

the gas side-blowing pressure regulating system unit comprises a gas nozzle 48 arranged on the bottom plate and the side surface of the left blanking chute 3, and a gas nozzle 48 arranged on the bottom plate and the side surface of the right blanking chute 4; the coal gas nozzles 48 are correspondingly communicated with grate bricks 49 in the left blanking chute 3 and the right blanking chute 4; the gas nozzle 48 is communicated with an external gas pipeline, and the gas pipeline is provided with a gas pressure regulating valve for regulating gas pressure; in the embodiment, the bottom plate of the left blanking chute 3 is provided with a group of gas nozzles 48, and the side surfaces of the left side and the right side are respectively provided with a group of gas nozzles 48 which are three groups in total; the bottom plate of the right blanking chute 4 is provided with a group of gas nozzles 48, and the side surfaces of the left side and the right side are respectively provided with a group of gas nozzles 48 which are three groups in total; the coal gas is laterally injected through a coal gas nozzle 48 and a grate brick 49 to form lateral air flow, and the synthetic coal gas is prevented from entering the pre-storage chamber 1 through a left blanking chute 3 and a right blanking chute 4;

the gasification agent injection unit 50 comprises a central injection port 52 arranged at the bottom of the red coke gasification reaction tower 2 and a peripheral injection port 51 arranged below the side wall of the red coke gasification reaction tower 2, and the central injection port 52 and the peripheral injection port 51 are both communicated with a gasification agent pipeline 53; in the embodiment, the gasifying agent injection unit 50 is positioned in the lower tower body 35, the gasifying agent from a gasifying agent pipeline 53 is injected upwards through the central injection blowing port 52 and the peripheral injection blowing ports 51 and reacts with the coke breeze, the blue coke breeze and the red coke, the coke breeze and the blue coke have small particle size and high reaction activity and completely react with the gasifying agent, the red coke block has high reaction activity difference, only 3-5 percent of the red coke is reacted, and the residual 95-97 percent of the red coke continuously flows through the left red coke chute 5 and the right red coke chute 6 and falls into the dry quenching unit, wherein the gasifying agent is mixed gas of water vapor, carbon dioxide and oxygen;

the nitrogen side-blowing unit comprises a nitrogen nozzle 54 arranged on the bottom plate and the side surface of the left red coke chute 5 and a nitrogen nozzle 54 arranged on the bottom plate and the side surface of the right red coke chute 6; the nitrogen nozzle 54 is correspondingly communicated with the grate bricks 49 in the left red coke chute 5 and the right red coke chute 6; the nitrogen nozzle 54 is communicated with the nitrogen pipeline 45; in the embodiment, a group of nitrogen nozzles 54 is arranged on the bottom plate of the red coke chute 5 on the left side, and a group of nitrogen nozzles 54 is respectively arranged on the left side and the right side, and the three groups are combined to blow towards the center direction of the cylinder 42 of the quenching chamber; the bottom plate of the red coke chute 6 on the right side is provided with a group of nitrogen nozzles 54, the side surfaces on the left side and the right side are respectively provided with a group of nitrogen nozzles 54, and the three groups are combined and blown towards the center direction of the cylinder 42 of the coke quenching chamber; the nitrogen is obliquely sprayed out through the nitrogen nozzle 54 and the grate brick 49 to form a nitrogen curtain, so that the nitrogen is prevented from entering the red coke gasification reaction tower 2.

The utility model provides a method for preparing synthetic coal gas by dry quenching, which adopts the device for preparing synthetic coal gas by dry quenching, and comprises the following steps:

s1, sealing and charging process:

the water seal furnace cover 16 is closed, and the two rotary turning plates 18 are both closed with the groove body 30 of the central bell 17;

a water seal furnace cover 16 is opened, a coke tank filled with red coke, blue carbon powder and coke powder is butted with the top of the prestoring chamber 1, two rotary turning plates 18 are rotated downwards and opened, and the red coke, the blue carbon powder and the coke powder in the coke tank fall into the prestoring chamber 1;

after coke charging is finished, the two rotary turning plates 18 rotate upwards to be closed with the groove body 30 of the central bell 17, so that gas and dust are prevented from upwelling, the coke tank is lifted, and the water seal furnace cover 16 is closed;

in the embodiment, red coke, blue carbon powder and coke powder are filled in the coke tank; the coke tank is lifted by a large hoisting elevator, is aligned to a water seal furnace cover 16 through a walking loading device and is butted with the top of the prestoring room 1; before the water-sealed furnace cover 16 is opened, the rotary turning plates 18 on the left side and the right side of the central bell 17 are both closed with the groove body 30 of the central bell 17 to seal the prestoring chamber 1, so that coal gas, coke powder and blue carbon powder dust are blocked in the prestoring chamber 1 and cannot escape to the outside of the furnace body, and flame is prevented; after the butt joint is finished, opening the two rotary plates, and feeding red coke, blue carbon powder and coke powder into a prestoring room 1; after coke charging is finished, closing the two rotary turning plates, lifting the coke tank by a lifter, and closing the water seal furnace cover 16;

s2, material storage and blanking process:

red coke, blue carbon powder and coke powder stored in the pre-storage chamber 1 respectively enter two red coke gasification reaction towers 2 through a left blanking chute 3 and a right blanking chute 4;

in the embodiment, the prestoring room 1 belongs to an intermediate storage structure and stores red coke, blue carbon powder and coke powder, so that the combination of a batch charging process and a continuous blanking process is facilitated;

s3, gas making process:

a central blowing port 52 and a peripheral blowing port 51 of the red coke gasification reaction tower 2 blow a gasifying agent to the upper part of the red coke gasification reaction tower, the gasifying agent reacts with red coke, blue carbon powder and coke powder respectively to generate synthetic coal gas, the synthetic coal gas enters a synthetic coal gas collecting pipe 31, and the red coke after reaction enters a left red coke chute 5 and a right red coke chute 6;

meanwhile, coal gas is injected into the left-side feeding chute 3 and the right-side feeding chute 4 through the coal gas nozzle 48, so that synthetic coal gas is prevented from entering the pre-storage chamber 1, the coal gas injected into the red coke gasification reaction tower 2 is merged with the synthetic coal gas in the red coke gasification reaction tower 2, and the merged coal gas enters the synthetic coal gas collecting pipe 31;

in this embodiment, the gasifying agent is a mixed gas of steam, carbon dioxide and oxygen; the coke powder and the semi-coke powder have small particle size and reactThe activity is large, the reaction with a gasifying agent is complete, the red coke block is large and has poor reaction activity, only 3-5 percent of the red coke block participates in the reaction, and the residual 95-97 percent of the red coke passes through a red coke chute and continuously flows and falls into a dry quenching unit; the synthetic gas produced in the gas making process moves upwards, in order to prevent the synthetic gas from entering the pre-storage chamber 1, the gas pressure of the gas side-blowing pressure regulating system unit is regulated to 100Pa, the gas is laterally blown through the gas nozzle 48 and the grate brick 49 to form lateral gas flow, and the lateral gas flow is converged with the synthetic gas and enters the synthetic gas collecting pipe 31; synthetic gas in the synthetic gas collecting pipe 31 is dedusted by the cyclone deduster 36, cooled by the waste heat boiler 37 and dedusted by the bag deduster 38 and then flows into the main gas pipeline 39, and specifically, the dust content is reduced to 15mg/m by dedusting by the cyclone deduster 36³The hot coal gas enters a waste heat boiler 37 to be cooled to 50 ℃, enters a bag-type dust remover 38 to remove dust, and the dust content is reduced to 2mg/m³Then, the gas is collected into a main gas pipeline and is provided for a coking plant;

s4, red coke waste heat recovery process:

red coke in the left red coke chute 5 and the right red coke chute 6 enters a quenching chamber, nitrogen sprayed by a nitrogen hood 44 in the quenching chamber cools the red coke, and the cooled coke is discharged through a vibration feeder 46 and a rotary sealing valve 47;

meanwhile, nitrogen is blown to the side of the nitrogen nozzle 54, so that the nitrogen is prevented from entering the red coke gasification reaction tower 2.

In the embodiment, the red coke is subjected to countercurrent heat exchange with nitrogen in a quenching chamber, the red coke is cooled to 230 ℃ from 1000 ℃, the nitrogen is heated to 900 ℃ from 130 ℃, and the cooled coke is discharged through a vibration blanking device 46 and a rotary sealing valve 47, so that the continuous discharge of the coke is realized; in order to prevent nitrogen from entering a red coke gasification reaction section unit, the nitrogen is obliquely sprayed out through a nitrogen nozzle 54 and grate bricks 49 to form a nitrogen gas curtain, side-blown nitrogen is converged with nitrogen in a quenching chamber and enters a nitrogen gas collecting pipe 40, then the nitrogen enters an external waste heat boiler to exchange heat with water to produce steam for power generation, the nitrogen is cooled to 130 ℃, and the nitrogen returns to the quenching chamber through a circulating fan to continuously cool coke.

Application examples

Shanxi coke-oven plant has 2 6.25 m stamp-charged coke ovens, and the coke capacity per year is 150 ten thousand tons. The coking industry produces chemical raw materials such as methanol, ethanol and the like by using coke oven gas, and faces the serious problem of gas shortage.

Make-up of synthesis gas 1 x 10⁴m³And/or meets the methanol energy production requirement.

During the production process of a coke-oven plant, a large amount of coke powder is produced. A large amount of semi-coke powder in semi-coke plants around Shanxi province needs to be sold.

A process and a device which can be used for loading high-temperature red coke and converting coke powder, blue carbon powder and a part of red coke into synthetic gas are built in a coking plant to complete the series connection of gas making and dry quenching processes. During gas making reaction, carbon dioxide, steam and pure oxygen are used as gasifying agents, and the volume ratio is CO₂:H₂O:O₂＝6:2:2。

The gasifying agent reacts with the coke powder and the semi-coke powder, and the consumption of the coke powder and the semi-coke powder is more than 95 percent. The gasifying agent reacts with the red coke, and the consumption proportion of the red coke is 4 percent. The method realizes the increase of the yield of the synthetic gas, the utilization of the waste heat of the dry quenching coke, the improvement of the integral equipment level of the coking plant and the improvement of the economic benefit of the coking plant.

The device for preparing the synthetic coal gas by dry quenching of the embodiment is an industrial furnace which integrates two functions of red coke gas making and red coke waste heat recovery, and comprises a pre-storage chamber 1, a red coke gasification reaction section unit and a dry quenching unit which are sequentially communicated from top to bottom, wherein the top of the pre-storage chamber 1 is provided with a sealed coke-sealing unit which is used for preventing gas and particles in the pre-storage chamber 1 from leaking and burning to form a fire column when coke is loaded, in order to solve the problem of red coke charging fire column, waste heat recovery and the problem of gas making and dry quenching process series connection; the red coke gasification reaction section unit comprises two red coke gasification reaction towers 2 arranged at two sides below the pre-storage chamber 1, the pre-storage chamber 1 is respectively communicated with the upper parts of the side surfaces of the two red coke gasification reaction towers 2 through a left blanking chute 3 and a right blanking chute 4, so that coke in the pre-storage chamber 1 respectively enters the two red coke gasification reaction towers 2 through the left blanking chute 3 and the right blanking chute 4; the coke dry quenching unit comprises a coke quenching chamber, the coke quenching chamber is respectively communicated with the bottom ends of the two red coke gasification reaction towers 2 through a left red coke chute 5 and a right red coke chute 6, so that red coke in the two red coke gasification reaction towers 2 respectively enters the coke quenching chamber through the left red coke chute 5 and the right red coke chute 6; the left blanking chute 3, the right blanking chute 4, the red coke gasification reaction tower 2, the left red coke chute 5 and the right red coke chute 6 are all provided with gas injection structures for injecting gas.

The device for preparing the synthetic gas by dry quenching of the embodiment needs to be constructed in a matching way and comprises a large hoisting elevator of the Taiyuan heavy industry, a steel structure derrick, a coke tank of the large continuous heavy ore and a walking and loading device of the large continuous heavy ore, which are used for loading red hot coke. The red coke gasification reaction section unit is matched with a coal gas cyclone dust collector 36, a waste heat boiler 37 and a bag-type dust collector 38 for purifying dust in coal gas and reducing the temperature of the coal gas to below 50 ℃, and the processing capacities of the cyclone dust collector 36 and the bag-type dust collector 38 are set to be 1.25 x 10⁴m³The waste heat boiler 37 comprises a superheater, an evaporator, an economizer and a cooling tower, and reduces the temperature of the coal gas to 35 ℃ and enters a coal gas main pipeline 39.

The sealed coke-sealing unit comprises three mechanical units, namely a water-sealing furnace cover 16, a rotary turning plate 18 and a central bell 17. The water seal furnace cover 16 adopts a dry quenching water seal furnace cover 16 produced by heavy industry and a matched electric hydraulic driving device. The rotary turnover plate 18 comprises a support 19 fixedly connected with the top of the first cone 7, and the support 19 is connected with a rotary water beam 20 through a bearing 21; the rotating water beam 20 is connected with a rotating motor 22 through a transmission structure, and the rotating motor 22 drives the rotating water beam 20 to rotate; the side surface of the rotating water beam 20 is connected with a fire-resistant shell 25, and a water-cooled wall 26 is arranged in the fire-resistant shell 25; the inside of the rotating water beam 20 is provided with a cooling water pipe communicated with the water wall 26, and the water inlet end and the water outlet end of the cooling water pipe are both provided with rotary valves 27, so that the rotary turning plate 18 can be cooled sufficiently under a high-temperature condition, the equipment is ensured not to deform, and the service life is long. The central bell 17 comprises a cuboid water beam 28 connected with the top of the first cone 7, a sharp cap 29 is arranged at the top of the cuboid water beam 28, the bottom of the cuboid water beam 28 is connected with a groove body 30, and the side face of the groove body 30 is in closed connection with one end, far away from the rotating water beam 20, of the fireproof shell 25. When red coke is filled in the coke can, before the water seal furnace cover 16 is opened, the rotary turning plates 18 on the left side and the right side of the central bell 17 are closed, the rotary turning plates are closed with the groove body 30 of the central bell 17, the prestoring chamber 1 is closed, coal gas, coke powder and semi-coke powder dust are blocked inside the prestoring chamber 1 and cannot escape to the outside of the furnace body, and flame can be prevented. When the coke tank falls down and the loading device is butted with the prestoring chamber 1, the rotary turning plates 18 on the left side and the right side rotate downwards and are opened, and red coke, semi-coke powder and coke powder in the coke tank fall down into the prestoring chamber 1. After coke charging is finished, the left and right rotary turning plates 18 rotate upwards to be sealed with the groove body 30 of the central bell 17 in a closed mode to prevent gas and dust from upwelling, the coke tank is lifted by the lifter, and then the water seal furnace cover 16 is closed.

The outer shell of the prestore chamber 1 is made of steel materials, the inner lining is made of refractory bricks, and A-grade mullite refractory bricks are adopted at the refractory bricks. The pre-storage chamber 1 comprises a first cone 7, a storage chamber 8 and a second cone 9 which are sequentially communicated from top to bottom. The first cone 7 is provided with an electronic pressure gauge for detecting the pressure of the gas in the pre-storage chamber 1 and a gas diffusion combustion device for leading out and combusting the gas in the pre-storage chamber 1, the gas diffusion combustion device comprises a diffused gas outlet 13, a diffused gas pipeline 14 and a diffused gas combustion torch 15 which are sequentially connected, and if the pressure of the gas in the pre-storage chamber 1 is 0-50 Pa, the gas diffusion combustion device does not work; if the pressure of the coal gas in the prestoring chamber 1 is higher than 50Pa, the coal gas diffusion combustion device is started to lead out and combust the coal gas so as to ensure that the pressure of the coal gas in the prestoring chamber 1 is within the range of 0-50 Pa, and the diffusion coal gas combustion torch 15 adopts the steel coking coal gas storage tank combustion torch, and belongs to mature industrial products. The storage chamber 8 is of a cylinder 42 structure, the inner diameter is 8m, the height is 6m, the shell is made of steel materials, the lining is made of refractory materials, and the refractory materials are A-grade corundum bricks. The lower port of the second cone 9 is square, the shell of the device structure is welded by steel plates, wear-resistant and high-temperature-resistant corundum bricks are laid inside the shell, a fire-resistant retaining wall 10 is arranged inside the second cone 9, the fire-resistant retaining wall 10 divides the second cone 9 into a left part and a right part, the left part is communicated with the top end of a left blanking chute 3 through a left blanking port 11, the right part is communicated with the top end of a right blanking chute 4 through a right blanking port 12, and the left blanking port 11 and the right blanking port 12 are both square.

The left blanking chute 3 is in butt joint with a left blanking interface 11 of the pre-storage chamber 1, and the right blanking chute 4 is in butt joint with a right blanking interface 12 of the pre-storage chamber 1. The structure of the left blanking chute 3 is the same as that of the right blanking chute 4: the outer shell is welded by steel plates, and refractory materials are paved inside the outer shell; the inclination angle of the bottom plate of the blanking chute is 60 degrees, so that the red coke is ensured to fall normally; the red coke is of a quadrilateral cone structure, the cone angle is 10 degrees, the cross sectional area of the lower part of the red coke is larger than that of the upper part of the red coke, and the red coke cannot be accumulated and blocked. The bottoms of the left blanking chute 3 and the right blanking chute 4 are respectively provided with a coal gas side-blowing pressure regulating system unit, and each coal gas side-blowing pressure regulating system unit comprises a coal gas nozzle 48 arranged on the bottom plate and the side surface of the left blanking chute 3 and a coal gas nozzle 48 arranged on the bottom plate and the side surface of the right blanking chute 4; the coal gas nozzles 48 are correspondingly communicated with grate bricks 49 in the left blanking chute 3 and the right blanking chute 4; the gas nozzle 48 is communicated with a gas pipeline, and the gas pipeline is provided with a gas pressure regulating valve for regulating gas pressure; the bottom plate of the left blanking chute 3 is provided with a group of gas nozzles 48, and the side surfaces of the left side and the right side are respectively provided with a group of gas nozzles 48 which are three groups in total; the bottom plate of the right blanking chute 4 is provided with a group of gas nozzles 48, and the side surfaces of the left side and the right side are respectively provided with a group of gas nozzles 48 which are three groups in total; the gas pressure is adjusted by the gas side-blowing pressure adjusting system unit, the gas is laterally injected through the gas nozzle 48 and the grate brick 49 to form lateral air flow, and the synthetic gas is prevented from entering the pre-storage chamber 1 through the left blanking chute 3 and the right blanking chute 4.

The red coke gasification reaction tower 2 is a reaction tower for generating synthetic gas by reacting coke powder, blue carbon powder and a gasifying agent, the number of the red coke gasification reaction towers 2 is two, the two reaction towers are respectively positioned at the left side and the right side below the prestoring chamber 1, the shell of the tower body is a heat-resistant steel shell, and the lining is a refractory brick. The red coke gasification reaction tower 2 comprises a synthetic gas collecting pipe 31, an upper conical section 32, an upper tower body 33, a lower conical section 34 and a lower tower body 35 which are sequentially communicated from top to bottom, and the tower body is of a cylindrical structure or a cuboid structure. The lower tower body 35 is provided with a gasifying agent injection unit 50, gasifying agents from a gasifying agent pipeline 53 are upwards injected through a central injection hole 52 and peripheral injection holes 51 and react with coke powder, semi-coke powder and red coke, the coke powder and the semi-coke powder have small particle sizes and high reactivity and react with the gasifying agents by 95 percent, the red coke blocks have high reactivity difference, only 4 percent of the red coke blocks participate in the reaction, and the rest 96 percent of the red coke and 5 percent of the semi-coke powder and the coke powder continuously flow and fall into the dry quenching unit through a left red coke chute 5 and a right red coke chute 6.

The left red coke chute 5 and the right red coke chute 6 are of the same structure and are of quadrilateral cone structures, and the inclination angles of the bottom plates of the left red coke chute 5 and the right red coke chute 6 are 60 degrees. The shells of the left red coke chute 5 and the right red coke chute 6 are made of alloy steel plates and are lined with refractory materials. The bottom plate of the red coke chute 5 on the left side is provided with a group of nitrogen nozzles 54, the side surfaces on the left side and the right side are respectively provided with a group of nitrogen nozzles 54, and the three groups are combined and blown towards the center direction of the cylinder 42 of the coke quenching chamber; the bottom plate of the red coke chute 6 on the right side is provided with a group of nitrogen nozzles 54, the side surfaces on the left side and the right side are respectively provided with a group of nitrogen nozzles 54, and the three groups are combined and blown towards the center direction of the cylinder 42 of the coke quenching chamber; the nitrogen is obliquely sprayed out through the nitrogen nozzle 54 and the grate brick 49 to form a nitrogen curtain, so that the nitrogen is prevented from entering the red coke gasification reaction section unit.

The coke dry quenching unit cools coke through circulating nitrogen, and the equipment structure is different from that of large-scale coke dry quenching: in the traditional dry quenching, the material is discharged from the right upper part, and nitrogen flows out from an annular air duct on the side surface; and the utility model discloses a red burnt is the side direction unloading, and nitrogen gas flows from quenching chamber upper portion, and nitrogen gas flows more smoothly, the utility model discloses a side direction unloading, nitrogen gas flow from quenching chamber upper portion, can realize that red burnt gas making and red burnt refrigerated process equipment establish ties, solve the difficult problem of equipment overall arrangement. The dry quenching unit comprises a quenching chamber, a nitrogen hood 44, a nitrogen pipeline 45, a vibration feeder 46 and a rotary sealing valve 47, wherein the quenching chamber comprises a nitrogen gas collecting pipe 40, an upper bell mouth 41, a cylinder 42 and a lower bell mouth 43 which are sequentially communicated from top to bottom, the cylinder 42 is respectively communicated with a left red coke chute 5 and a right red coke chute 6, red coke is in the quenching chamber and carries out countercurrent heat exchange with the nitrogen gas, the red coke is cooled to 230 ℃ from 1000 ℃, the nitrogen gas is heated to 900 ℃ from 130 ℃, the cooled coke is discharged through the vibration feeder 46 and the rotary sealing valve 47, and the vibration feeder 46 and the rotary sealing valve 47 adopt mature industrial products of Qin smelting heavy industry.

The embodiment provides a method for preparing synthetic gas by dry quenching, and the device for preparing synthetic gas by dry quenching comprises the following steps:

s1, sealing and charging process:

red coke, blue carbon powder and coke powder are filled in the coke tank, and the coke tank rotates and uniformly mixes the red coke, the blue carbon powder and the coke powder; the coke tank is lifted by a large hoisting elevator, is aligned to a water seal furnace cover 16 through a walking loading device and is butted with the top of the prestoring room 1; 5 seconds before the water seal furnace cover 16 is opened, the rotary turning plates 18 on the left side and the right side of the central bell 17 are both closed with the groove body 30 of the central bell 17 to seal the prestoring chamber 1, so that coal gas, coke powder and semi-coke powder dust are blocked inside the prestoring chamber 1 and cannot escape to the outside of the furnace body, and flame is prevented;

the water-sealed furnace cover 16 is opened, the coke tank filled with red coke, blue carbon powder and coke powder falls down to be butted with the top of the prestoring chamber 1, 2 seconds after the butting is finished, the two rotary turning plates 18 are downwards rotated and opened, and the red coke, the blue carbon powder and the coke powder in the coke tank fall down to enter the prestoring chamber 1;

after coke charging is finished, the two rotary turning plates 18 rotate upwards to be closed and sealed with the groove body 30 of the central bell 17, so that gas and dust are prevented from upwelling, after 2 seconds, the coke tank is lifted by the lifter, and the water seal furnace cover 16 is closed;

s2, material storage and blanking process:

in the embodiment, the prestoring room 1 belongs to an intermediate storage structure and stores 6 cans of red coke, blue carbon powder and coke powder, so that the combination of a batch charging process and a continuous blanking process is facilitated; red coke, blue carbon powder and coke powder stored in the pre-storage chamber 1 respectively enter two red coke gasification reaction towers 2 through a left blanking chute 3 and a right blanking chute 4;

s3, gas making process:

the central blowing port 52 and the peripheral blowing ports 51 of the red coke gasification reaction tower 2 blow gasification agents to the upper part of the interior of the red coke gasification reaction tower, the gasification agents refer to mixed gas of water vapor, carbon dioxide and oxygen, the granularity of coke powder and blue carbon powder is small, the reaction activity is large, the gasification agents react with the gasification agents by 95 percent, the reaction activity of red coke blocks is large, only 4 percent of the red coke blocks participates in the reaction, and the rest 96 percent of red coke and 5 percent of blue carbon powder and coke powder continuously flow and fall into a dry quenching unit through the left red coke chute 5 and the right red coke chute 6;

the gasification agent respectively reacts with red coke, semi-coke powder and coke powder to generate synthetic coal gas which moves upwards; in order to prevent the synthetic gas from entering the pre-storage chamber 1, the gas pressure of the gas side-blown pressure regulating system unit is regulated to 100Pa, the gas is laterally blown through the gas nozzle 48 and the grate brick 49 to form lateral gas flow, and the lateral gas flow is converged with the synthetic gas and enters the synthetic gas collecting pipe 31;

the synthetic gas in the synthetic gas collecting pipe 31 is dedusted by the cyclone 36 to reduce the dust content to 15mg/m³The hot coal gas enters a waste heat boiler 37 to be cooled to 35 ℃, enters a bag dust collector 38 to be dedusted, and the dust content is reduced to 2mg/m³Then, the gas flows into a main gas pipeline 39 to be supplied to a coking plant for use;

s4, red coke waste heat recovery process:

red hot coke enters a coke quenching chamber through a left red coke chute 5 and a right red coke chute 6;

the red coke is subjected to countercurrent heat exchange with nitrogen in a quenching chamber, the red coke is cooled to 230 ℃ from 1000 ℃, the nitrogen is heated to 900 ℃ from 130 ℃, and the cooled coke is discharged through a vibration blanking device 46 and a rotary sealing valve 47, so that the continuous discharge of the coke is realized;

in order to prevent nitrogen from entering a red coke gasification reaction section unit, the pressure of the nitrogen is adjusted to be 100Pa, the nitrogen is obliquely sprayed out through a nitrogen nozzle 54 and grate bricks 49 to form a nitrogen gas curtain, side-blown nitrogen is converged with nitrogen in a coke quenching chamber and enters a nitrogen gas collecting pipe 40, then the nitrogen enters an external waste heat boiler to exchange heat with water to produce steam for power generation, the nitrogen is cooled to 130 ℃, and the nitrogen returns to the coke quenching chamber through a circulating fan to continuously cool coke.

Through the process, the coke-oven plant can produce more 1.0 ten thousand meters per hour³The synthetic gas per hour increases the income of methanol by 1 million yuan every year.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A device for preparing synthetic coal gas by dry quenching is characterized by comprising a pre-storage chamber, a red coke gasification reaction section unit and a dry quenching unit which are sequentially communicated;

2. The device for preparing synthetic gas by dry quenching according to claim 1, wherein the pre-storage chamber comprises a first cone, a storage chamber and a second cone which are communicated in sequence; the inside fire-resistant barricade that is provided with of second centrum, fire-resistant barricade falls into left side part and right side part with the second centrum, the left side part is through the top intercommunication of left side unloading interface with left side unloading chute, the right side part is through the top intercommunication of right side unloading interface with right side unloading chute.

3. The device for preparing synthetic gas by dry quenching according to claim 1, wherein the sealed coke-charging unit comprises a water-sealed furnace cover, a central bell and two rotary turning plates, and the two rotary turning plates are arranged on two sides of the central bell;

the rotary turning plate comprises a support fixedly connected with the top of the first cone, and the support is connected with the rotary water beam through a bearing; the rotating water beam is connected with a rotating motor through a transmission structure, and the rotating motor drives the rotating water beam to rotate; the side surface of the rotating water beam is connected with a fire-resistant shell, and a water-cooled wall is arranged in the fire-resistant shell; a cooling water pipe communicated with the water-cooled wall is arranged inside the rotating water beam, and a rotary valve is arranged at both the water inlet end and the water outlet end of the cooling water pipe;

4. The device for preparing the synthetic gas by dry quenching as claimed in claim 1, wherein the left blanking chute and the right blanking chute have the same structure and are both quadrangular pyramid structures, and the cone angle of the quadrangular pyramid structure is more than 5 degrees; the inclination angle of the bottom plates of the left blanking chute and the right blanking chute is larger than 45 degrees.

5. The device for preparing the synthetic gas by dry quenching as claimed in claim 1, wherein the red coke gasification reaction tower comprises a synthetic gas collecting pipe, an upper conical section, an upper tower body, a lower conical section and a lower tower body which are sequentially communicated, and the red coke gasification reaction tower is used for reacting coke powder, semi-coke powder and a gasifying agent to generate the synthetic gas.

6. The device for preparing synthetic gas by dry quenching according to claim 1, wherein the left red coke chute and the right red coke chute have the same structure and are of quadrilateral cone structures, and the inclination angles of the bottom plates of the left red coke chute and the right red coke chute are both larger than 45 degrees.

7. The apparatus for preparing synthetic gas by dry quenching as claimed in claim 1, wherein the quenching chamber comprises a nitrogen gas collecting pipe, an upper bell mouth, a cylinder and a lower bell mouth which are sequentially communicated, a nitrogen gas hood communicated with a nitrogen gas pipeline is arranged in the quenching chamber, and a vibration feeder and a rotary sealing valve are connected below the lower bell mouth for discharging cooled coke.

8. The device for preparing the synthetic gas by dry quenching according to claim 7, wherein the gas injection structure comprises a gas side-blowing pressure regulating system unit arranged on a left blanking chute and a right blanking chute, a gasifying agent injection unit arranged on a red coke gasification reaction tower, and a nitrogen side-blowing unit arranged on a left red coke chute and a right red coke chute;

the coal gas side-blowing pressure regulating system unit comprises a bottom plate and a coal gas nozzle arranged on the side surface of the left blanking chute, and a bottom plate and a coal gas nozzle arranged on the side surface of the right blanking chute; the coal gas nozzles are correspondingly communicated with the grate bricks in the left blanking chute and the right blanking chute; the gas nozzle is communicated with an external gas pipeline, and the gas pipeline is provided with a gas pressure regulating valve for regulating gas pressure;