CN219058878U - Vertical coke oven system with rapid heating function - Google Patents

Abstract

The utility model discloses a rapid heating vertical coke oven system which comprises a circulating water pump, a coke oven, a waste heat boiler, a steam heater, an induced draft fan and a chimney which are sequentially communicated. The coke making furnace comprises a furnace body, wherein a carbonization section, a transition section, an activation section and a cooling section which are mutually communicated are sequentially arranged in the furnace body from top to bottom; a plurality of material channels are arranged at intervals at the positions of the carbonization section, the transition section and the activation section in the furnace body, the closed spaces at the periphery of the material channels form a flue, gas channels are arranged on two opposite side walls of the positions of the carbonization section and the activation section of the material channels, a microwave heater is arranged on the side wall of the position of the transition section of the material channels, and the bottom of the material channels is communicated with an activation gas inlet; the parts of the flue, which are positioned at the carbonization section and the activation section, are respectively provided with an air afterburner; the cooling section is provided with a cooling coil.

Description

Vertical coke oven system with rapid heating function

Technical Field

The utility model belongs to the technical field of material preparation, and particularly relates to a rapid heating vertical coke oven system.

Background

The material channels and the flues of the existing vertical type Schlemen furnace for preparing active coke are arranged in a staggered manner, the furnace body is square, the flues and the material channels are thin-layer cuboid channels, the width of the material channels is small, the section of the heat-resistant brick occupies a larger area, and the size of the furnace body is larger; in addition, the activation steam of the vertical type Sieve furnace is generated by switching left and right combustion chamber heat storage bricks, the process is complex, and the steam temperature is uncontrollable; the vertical type Sijeep furnace can only activate carbonized materials, because the problems of coking and scaling of furnace walls, blockage of precipitated gas channels, bonding of materials, and the like are difficult to occur in the heating process of carbonized materials, such as less tar, volatile matters and fine crushed powder, so the vertical type Sijeep furnace is only an activation furnace, cannot be used as a carbonization activation furnace for preparing coke from raw coal in one step, and has poor adaptability to fixed particles and specific operation parameters; the activated steam of the vertical type Siwearing furnace passes through the two sides of the active coke layer in parallel, slowly permeates into the active coke layer in the advancing process of the steam, has low activation speed, and has insufficient contact between the activating agent and the active coke and poor activation effect.

Disclosure of Invention

In view of the above, the utility model aims to provide a rapid heating vertical coke oven system which is a carbonization and activation integrated oven, and by arranging a microwave heater at a transition section, the material temperature from the carbonization section can be rapidly increased to an activation temperature, the quality of active coke is improved, and the energy utilization rate in the system is high.

In order to achieve the above object, an embodiment of a first aspect of the present utility model provides a rapid heating vertical coke oven system, including:

the coke making furnace comprises a furnace body, wherein a carbonization section, a transition section, an activation section and a cooling section which are mutually communicated are sequentially arranged in the furnace body from top to bottom; a plurality of material channels are arranged at intervals at the positions of the carbonization section, the transition section and the activation section in the furnace body, the closed spaces at the periphery of the material channels form a flue, gas channels are arranged on two opposite side walls of the carbonization section and the activation section, a microwave heater is arranged on the side wall of the transition section, and the bottom of the material channel is communicated with an activation gas inlet; the parts of the flue, which are positioned at the carbonization section and the activation section, are respectively provided with an air afterburner; the cooling section is provided with a cooling coil;

the exhaust-heat boiler flue gas inlet is communicated with the carbonization section flue gas outlet;

the hot side inlet of the steam heater is communicated with the flue gas outlet of the waste heat boiler, and the hot side outlet of the steam heater is sequentially communicated with the induced draft fan and the chimney; the cold side outlet of the steam heater is communicated with the activated gas inlet;

and the outlet of the circulating water pump is sequentially communicated with the cooling coil and the cold measuring inlet of the steam heater.

In addition, the rapid heating vertical coke oven system provided by the embodiment of the utility model can also have the following additional technical characteristics:

in some embodiments, microwave heaters are mounted in both side walls of the material channel opposite to the transition section.

In some embodiments, the microwave heaters in the two opposite side walls of the transition section are symmetrically arranged.

In some embodiments, the bottoms of the plurality of material channels are each in communication with the activated gas inlet through a steam injection grid.

In some embodiments, the activated gas inlet and the carbonization section flue gas outlet are both arranged on the side wall of the furnace body; the activating gas inlet is arranged at the bottom of the activating section; and the smoke outlet of the carbonization section is arranged at the top of the carbonization section.

In some embodiments, the material channel has oppositely disposed first and second sidewalls; the first side wall and the second side wall are respectively provided with a plurality of gas channels at the positions of the carbonization section and the activation section, and the gas channels are respectively arranged at intervals up and down; the plurality of gas channels on the first side wall and the plurality of gas channels on the second side wall are symmetrically arranged.

In some embodiments, the gas channels are disposed parallel to a horizontal plane.

In some embodiments, the plurality of air afterburner openings are uniformly distributed in the part of the flue located in the carbonization section and the activation section.

In some embodiments, a space is reserved between two adjacent material channels, and all the material channels are arranged in parallel; and a plurality of material channels are spaced from the inner wall of the furnace body.

In some embodiments, the material channel is communicated with a feed inlet of the furnace body, and the bottom of the material channel is communicated with a discharge outlet of the furnace body; the feed inlet of furnace body is established the top of furnace body, the discharge gate of furnace body is established the bottom of furnace body.

The rapid heating vertical coke oven system provided by the embodiment of the utility model has the following beneficial effects:

(1) Carbonization and activation integrated furnace, small equipment occupation area and large yield

The coke making furnace is a carbonization and activation integrated furnace, active coke with developed pores can be obtained by carbonizing and activating raw coal particles in one step, the occupied area of a system is effectively reduced, and the carbonization and activation integrated furnace has high coke making efficiency, high yield and low equipment investment cost.

(2) The temperature rising speed of the transition section is high

The transition section between the carbonization section and the activation section of the coke making furnace is provided with a microwave heating device, the temperature of the material from the carbonization section is rapidly increased to the activation temperature, in the process, the volatile matters of the coal are rapidly separated out, the macromolecular long-chain structure is rapidly decomposed into small molecules, the process promotes the formation of a macroporous structure on the surface of the active coke, and a good foundation is provided for the next activation, so that the obtained active coke has developed pores and good quality.

(3) The activated water vapor penetrates through the active coke layer, so that the activation time is short and the effect is good

The activating gas enters from the bottom of the material channel of the activating section, contacts and activates the material in an up-down countercurrent way, and the activating gas contacts and activates the material more fully, so that the activating time is short and the effect is good.

(4) High in-system energy utilization rate

After flue gas from a coke oven is fully combusted by a secondary combustion furnace, the flue gas waste heat is utilized to heat cooling water heated after heat exchange from a cooling section, and then activated steam of an activation section is generated, so that the energy utilization rate of the whole system is high.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

fig. 1 is a schematic view showing a simple structure of a rapid heating vertical coke oven system according to an embodiment of the present utility model.

FIG. 2 is a horizontal cross-sectional view of a coke oven transition section in a rapid-rise vertical coke oven system in accordance with one embodiment of the utility model.

Reference numerals:

1-a furnace body; 2-flue; 3-an air afterburner; 4-material channel; 5-pyrolysis gas channels; 6-a microwave heater; 7-an activated gas channel; 8-steam injection grid; 9-cooling coils; 10-an exhaust-heat boiler; 11-a steam heater; 12-induced draft fan; 13-chimney; 14-a circulating water pump; 15-a flue gas outlet of the carbonization section; 16-an activated gas inlet; 17-a feed inlet of the furnace body; 18-a discharge hole of the furnace body; 19-a first sidewall; 20-a second sidewall; a 100-carbonization section; 200-transition section; 300-an activation section; 400-cooling section.

Detailed Description

Reference will now be made in detail to embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

The following describes a rapid heating vertical coke oven system according to an embodiment of the present utility model with reference to the accompanying drawings.

Fig. 1 is a schematic view showing a simple structure of a rapid heating vertical coke oven system according to an embodiment of the present utility model.

As shown in fig. 1, the rapid heating vertical coke oven system in the embodiment of the utility model comprises a circulating water pump 14, and a coke oven, a waste heat boiler 10, a steam heater 11, an induced draft fan 12 and a chimney 13 which are sequentially communicated. The coke oven comprises an oven body 1, wherein a carbonization section 100, a transition section 200, an activation section 300 and a cooling section 400 which are mutually communicated are sequentially arranged in the oven body 1 from top to bottom; a plurality of material channels 4 are arranged at intervals at the positions of the carbonization section 100, the transition section 200 and the activation section 300 in the furnace body 1, a flue 2 is formed by the closed spaces at the periphery of the material channels 4, gas channels are arranged on two opposite side walls of the carbonization section 100 and the activation section 300, a microwave heater 6 is arranged on the side wall of the transition section 200 of the material channel 4, and the bottom of the material channel 4 is communicated with an activation gas inlet 16; the parts of the flue 2, which are positioned in the carbonization section 100 and the activation section 300, are respectively provided with an air afterburner 3; the cooling section 400 is provided with a cooling coil 9; the flue gas inlet of the waste heat boiler 10 is communicated with the flue gas outlet 15 of the carbonization section 100; the hot side inlet of the steam heater 11 is communicated with the flue gas outlet of the waste heat boiler 10, and the hot side outlet of the steam heater 11 is sequentially communicated with the induced draft fan 12 and the chimney 13; the cold side outlet of the steam heater 11 is communicated with an activated gas inlet 16; the outlet of the circulating water pump 14 is sequentially communicated with the cooling coil 9 and the cold measuring inlet of the steam heater 11.

The rapid heating vertical coke oven system provided by the embodiment of the utility model has the following advantages: (1) The carbonization and activation integrated furnace has small occupied area of equipment and large yield. The coke making furnace is a carbonization and activation integrated furnace, active coke with developed pores can be obtained by carbonizing and activating raw coal particles in one step, the occupied area of a system is effectively reduced, and the carbonization and activation integrated furnace has high coke making efficiency, high yield and low equipment investment cost. And (2) the temperature rising speed of the transition section is high. The transition section between the carbonization section and the activation section of the coke making furnace is provided with a microwave heating device, the temperature of the material from the carbonization section is rapidly increased to the activation temperature, in the process, the volatile matters of the coal are rapidly separated out, the macromolecular long-chain structure is rapidly decomposed into small molecules, the process promotes the formation of a macroporous structure on the surface of the active coke, and a good foundation is provided for the next activation, so that the obtained active coke has developed pores and good quality. (3) The activated water vapor penetrates through the active coke layer, so that the activation time is short and the effect is good. The activating gas enters from the bottom of the material channel of the activating section, contacts and activates the material in an up-down countercurrent way, and the activating gas contacts and activates the material more fully, so that the activating time is short and the effect is good. And (4) the energy utilization rate in the system is high. After flue gas from a coke oven is fully combusted by a secondary combustion furnace, the flue gas waste heat is utilized to heat cooling water heated after heat exchange from a cooling section, and then activated steam of an activation section is generated, so that the energy utilization rate of the whole system is high.

In some embodiments, the top of the furnace body is provided with a feed inlet (i.e. a feed inlet 17 of the furnace body), the feed inlet is communicated with the inlet at the top of the material channel, the bottom of the furnace body is provided with a discharge outlet (i.e. a discharge outlet 18 of the furnace body), and the discharge outlet is communicated with the outlet at the bottom of the material channel so as to ensure that raw coal particles can flow from top to bottom in the furnace body.

In some embodiments, a space is left between two adjacent material channels 4, and all material channels 4 are arranged in parallel; and a plurality of material channels 4 are spaced from the inner wall of the furnace body 1. The region between two adjacent material channels and the region between all material channels and the inner wall of the furnace body form a flue (shown in figure 2). Sealing partition plates can be arranged at the top and the bottom of the flue, so that the flue becomes a closed space. Although fig. 2 is a horizontal sectional view of the transition section, the horizontal sectional views of the activation section and the carbonization section are the same.

In some embodiments, the lane 4 has oppositely disposed first and second sidewalls 19, 20; the first side wall 19 and the second side wall 20 are provided with a plurality of gas channels at the positions of the carbonization section 100 and the activation section 300, and the gas channels are arranged at intervals up and down; the gas channels on the first side wall 19 and the gas channels on the second side wall 20 are symmetrically arranged. In some embodiments, the gas channels are disposed parallel to the horizontal plane. For convenience of the following description, the gas channel of the carbonization section may be defined as a pyrolysis gas channel 5, and the gas channel of the activation section may be defined as an activation gas channel 6. Pyrolysis gas generated by carbonization of raw coal particles in the carbonization section enters a flue from a pyrolysis gas channel 5, and is subjected to oxygen supplementing combustion under the action of an air afterburner 3 to remove tar and simultaneously maintain the heat of the carbonization section. The water gas and unreacted steam generated by the activation of the material in the activation section (the water vapor is adopted as the activation gas) enter the flue from the activation gas channel, and are combusted by the air supplemented in the flue to supplement and maintain the heat of the activation section.

In some embodiments, there are a plurality of air afterburners 3, and the plurality of air afterburners 3 are evenly distributed in the portion of the flue 2 located in the carbonization section 100 and the activation section 300. This ensures timely combustion of the gases from each pyrolysis gas channel and each activation gas channel. The air afterburner can be an air injection pipeline connected with an external air source, and the structure of the air afterburner can be the structure of the existing ammonia injection grid, and only the injected air is replaced by air, or the air injection pipeline is simply communicated with a plurality of spray heads.

The reason why the transition section is arranged in the coke oven and the microwave heater is arranged in the transition section is that: the carbonization section and the activation section have temperature difference, the carbonization temperature of the carbonization section is between 500 and 600 ℃, the activation temperature of the activation section is between 750 and 850 ℃, a temperature difference area exists between the carbonization section and the activation section, the heating rate of materials (carbonized materials) in the area has larger influence on the pore structure formed by active coke, and the final quality of the active coke is directly related.

In some embodiments, to increase the heating rate, microwave heaters 6 are mounted in both opposite side walls of the lane 4 at the location of the transition section 200. Preferably, the microwave heaters 6 in the two opposite side walls of the material channel 4 at the transition section 200 are symmetrically arranged, so that materials flowing through the same horizontal plane from top to bottom can be heated from two sides, and the heating efficiency is high. In addition, in order to further improve the heating efficiency, in other embodiments, a plurality of/layer (such as 2/layer) microwave heaters may be disposed from top to bottom, a space is left between two adjacent layers, and a temperature sensor is installed at the transition section to monitor the heating temperature in real time. The specific setting number/layer number of the microwave heaters can be determined according to the power of the selected single microwave heater, and if the power of the single microwave heater is low, the number of the microwave heaters needs to be larger, otherwise, the number of the microwave heaters can be smaller.

In some embodiments, the side wall of the material channel is formed by heat-resistant turning piles of silicon carbide, clay and the like, so that the installation position of the microwave heater can be reserved in the side wall and installed in the side wall of the material channel.

In some embodiments, the opposite side walls of the material channel provided with the microwave heater may be opposite side walls (i.e. the first side wall 19 and the second side wall 20 hereinafter) provided with the gas channel, and may be other opposite side walls, but in order to heat as much material as possible, the former is generally selected to improve the heating efficiency.

In some embodiments, the bottoms of the plurality of material channels 4 are each in communication with the activated gas inlet 16 through the steam injection grid 8. The steam injection grille 8 is arranged at the position between the activation section and the cooling section, the gas outlet of the steam injection grille 8 is opposite to the material channel, and the activation gas passes through the material channel from bottom to top and is in countercurrent contact with the material moving from top to bottom for activation. The steam injection grid 8 may be constructed as an existing ammonia injection grid, but converts the injected gas from ammonia gas to an activated gas such as water vapor.

In some embodiments, the activating gas inlet 16 and the carbonization section 100 flue gas outlet 15 are both provided on the side wall of the furnace body 1; the activated gas inlet 16 is arranged at the bottom of the activation section 300, so that the activated gas can be ensured to have contact time with materials in the material channel from top to bottom as much as possible, and the activation efficiency is improved; the flue gas outlet 15 of the carbonization section 100 is arranged at the top of the carbonization section 100 to prolong the flow path of the gas from the material channel in the flue, ensure that all the water gas from the activation section and the flue gas of the carbonization section can be supplemented with oxygen for combustion as far as possible, maintain the heat of the carbonization section and the activation section, and avoid the flue gas from being discharged out of the furnace body without being supplemented with oxygen for combustion in the furnace body.

The operation method of the rapid heating vertical coke oven system provided by the embodiment of the utility model comprises the following steps:

raw coal particles enter the material channel 4 from the top of the coke oven, sequentially pass through the carbonization section 100, the transition section 200, the activation section 300 and the cooling section 400, and are discharged from the bottom; the materials in the carbonization section 100 are heated to separate out pyrolysis gas, the pyrolysis gas enters a flue 2 of the carbonization section through a pyrolysis gas channel 5, and an air afterburner 3 is arranged in the flue 2 to burn the pyrolysis gas; the temperature of the material layer in the material channel 4 of the carbonization section 100 is between 500 and 600 ℃, the material layer is rapidly heated to 750 to 850 ℃ by a microwave heater 6 after entering the transition section 200, then enters the material channel 4 of the activation section, the bottom of the activation section is provided with a steam injection grid 8, high-temperature activation steam is in countercurrent contact with materials for activation, water gas and unreacted steam generated by activation enter the flue 2 from an activation gas channel 7 of the activation section, the water gas and the unreacted steam are combusted by air supplemented in the flue 2, the high-temperature flue gas is discharged from the upper part of a coke oven from bottom to top along the flue 2, enters the waste heat boiler 10 for complete combustion, enters the steam heater 11 for heat exchange, and finally is discharged into the chimney 13 by an induced draft fan 12. The active coke falls from the coke making furnace activation section to the cooling section 400 and is cooled to 80-100 ℃ and discharged from the bottom, meanwhile, the cooling section 400 is used for cooling cold water of the materials of the activation section, the temperature is increased after heat exchange, the cold water enters the steam heater 11 and is further heated by flue gas discharged from the waste heat boiler 10, high-temperature steam is generated, and then the high-temperature steam is used as activation gas to enter the coke making furnace activation section from the activation gas inlet 16.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the utility model, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the utility model.

Claims (10)

1. A rapid heating vertical coke oven system, comprising:

the coke making furnace comprises a furnace body, wherein a carbonization section, a transition section, an activation section and a cooling section which are mutually communicated are sequentially arranged in the furnace body from top to bottom; a plurality of material channels are arranged at intervals at the positions of the carbonization section, the transition section and the activation section in the furnace body, the closed spaces at the periphery of the material channels form a flue, gas channels are arranged on two opposite side walls of the carbonization section and the activation section, a microwave heater is arranged on the side wall of the transition section, and the bottom of the material channel is communicated with an activation gas inlet; the parts of the flue, which are positioned at the carbonization section and the activation section, are respectively provided with an air afterburner; the cooling section is provided with a cooling coil;

the exhaust-heat boiler flue gas inlet is communicated with the carbonization section flue gas outlet;

the hot side inlet of the steam heater is communicated with the flue gas outlet of the waste heat boiler, and the hot side outlet of the steam heater is sequentially communicated with the induced draft fan and the chimney; the cold side outlet of the steam heater is communicated with the activated gas inlet;

and the outlet of the circulating water pump is sequentially communicated with the cooling coil and the cold measuring inlet of the steam heater.

2. The rapid-heating vertical coke oven system of claim 1, wherein the two opposite side walls of the material channel at the transition section are provided with microwave heaters.

3. The rapid-heating vertical coke oven system of claim 2, wherein the microwave heaters in the two opposite side walls of the transition section are symmetrically disposed.

4. The rapid-heating vertical coke oven system of claim 1, wherein the bottoms of the plurality of material channels are each in communication with the activated gas inlet via a steam injection grid.

5. The rapid heating vertical coke oven system according to claim 1 or 4, wherein,

the activated gas inlet and the carbonization section flue gas outlet are both arranged on the side wall of the furnace body;

the activating gas inlet is arranged at the bottom of the activating section;

and the smoke outlet of the carbonization section is arranged at the top of the carbonization section.

6. The rapid-heating vertical coke oven system of claim 1, wherein the chute has a first side wall and a second side wall disposed opposite each other; the first side wall and the second side wall are respectively provided with a plurality of gas channels at the positions of the carbonization section and the activation section, and the gas channels are respectively arranged at intervals up and down; the plurality of gas channels on the first side wall and the plurality of gas channels on the second side wall are symmetrically arranged.

7. The rapid-heating vertical coke oven system of claim 1 or 6, wherein the gas passage is disposed parallel to a horizontal plane.

8. The rapid-heating vertical coke oven system of claim 1, wherein the plurality of air afterburner openings are uniformly distributed at the portions of the flue located in the carbonization section and the activation section.

9. The rapid heating vertical coke oven system according to claim 1, wherein,

a space is reserved between two adjacent material channels, and all the material channels are arranged in parallel;

and a plurality of material channels are spaced from the inner wall of the furnace body.

10. The rapid heating vertical coke oven system according to claim 1, wherein the material channel is communicated with a feed inlet of the oven body, and the bottom of the material channel is communicated with a discharge outlet of the oven body; the feed inlet of furnace body is established the top of furnace body, the discharge gate of furnace body is established the bottom of furnace body.

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