WO2015083508A1

WO2015083508A1 - Coal deactivation processing device

Info

Publication number: WO2015083508A1
Application number: PCT/JP2014/079915
Authority: WO
Inventors: 慶一中川; 大本　節男
Original assignee: 三菱重工業株式会社
Priority date: 2013-12-06
Filing date: 2014-11-12
Publication date: 2015-06-11
Also published as: AU2014358470B2; JP6226422B2; JP2015111015A; CN105793657B; AU2014358470A1; US20160289582A1; DE112014005551T5; CN105793657A

Abstract

The present invention makes it possible to prevent the spontaneous combustion of coal while causing oxygen to be adsorbed to the surface of the coal in an efficient manner. A coal deactivation processing device is provided with: a rotary kiln body (103) that is capable of rotation and into which coal and a processing gas are supplied; a feed pipe (142) that is provided so as to be capable of rotating together with the rotary kiln body (103), that extends along the lengthwise direction of the rotary kiln body (103), and within which a coolant flows; and a hat (143) that is provided to the outer circumferential section of the feed pipe (142) so as to protrude toward the rotation direction of the feed pipe (142). The feed pipe (142) and the hat (143) are arranged so as to pass through a coal layer resulting from the accumulation of coal (2) within the rotary kiln body (103) when the rotary kiln body (103) rotates.

Description

Coal deactivation processing equipment

The present invention relates to a coal deactivation treatment apparatus that performs deactivation treatment of coal with a treatment gas containing oxygen.

Low-grade coal (low-quality coal) with high water content such as lignite and sub-bituminous coal has a low calorific value per unit weight, so it is dried and dry-distilled by heating, and in a low-oxygen atmosphere. By reforming so as to reduce the oxidation reaction activity, the reformed coal has an increased calorific value per unit weight while preventing spontaneous ignition.

JP 2007-237011 A International Publication No. 95/13868 Pamphlet

As a coal inactivation treatment apparatus for inactivating dry distillation coal obtained by drying or carbonizing the above-described low-grade coal, a rotary kiln to which dry distillation coal and process gas are supplied is provided, and the periphery thereof is provided in the rotary kiln. An apparatus having a plurality of feed pipes adjacent to each other in the direction through which cooling water flows is being studied.

The above-described coal inactivation treatment apparatus rotates the rotary kiln and rotates the rotary kiln main body while cooling the dry-distilled coal with cooling water flowing through the feed pipe by rotating the rotary kiln and the plurality of feed pipes. While stirring, a plurality of feed pipes pass through a coal bed in which dry-distilled coal accumulates in a rotary kiln, lift the dry-distilled coal above the coal bed surface, and drop from above to the coal bed surface By stirring the carbonized carbon, the carbonized coal is inactivated by the processing gas. The agitation is repeated while the carbonized coal moves from the base end side to the tip end side of the rotary kiln, and the carbonized coal is gradually pulverized.

In the coal deactivation processing apparatus, when the pipe diameter of the feed pipe is large, the amount of dry-distilled coal that rides on the feed pipe increases according to the size of the feed pipe. The pulverization progresses too much, and the pulverized dry-distilled coal accompanies the processing gas supplied into the rotary kiln and is discharged out of the system together with the processing gas, reducing the yield of the deactivated coal. There was a possibility of letting it. On the other hand, when the pipe diameter of the feed pipe is small, the amount of dry-distilled coal that rides on the feed pipe is reduced according to the size, so that the contact efficiency between the dry-distilled coal and the processing gas decreases. Therefore, there is a possibility that the inactivation treatment of the carbonized coal cannot be performed efficiently.

Therefore, the present invention has been made to solve the above-described problems, and can efficiently adsorb oxygen onto the surface of coal while preventing spontaneous combustion of coal. It aims at providing the coal inactivation processing apparatus which can be performed.

The coal inactivation processing apparatus according to the first invention for solving the above-described problem is a coal inactivation processing apparatus that inactivates coal with a processing gas containing oxygen, in which the coal and the processing gas are contained inside. A kiln main body provided rotatably and provided rotatably with the kiln main body and extending in the longitudinal direction of the kiln main body, and a feed pipe through which cooling water flows. A projecting portion that protrudes in the rotation direction of the feed pipe and forms a hat shape in a radial cross section of the feed pipe, and the feed pipe and the projecting portion are provided on the outer periphery of the feed pipe, When the kiln main body rotates, the kiln main body is disposed so as to pass through a coal bed in which the coal is deposited.

The coal inactivation processing apparatus according to the second invention that solves the above-described problem is the coal inactivation processing apparatus according to the first invention described above, wherein the protrusion is a radial section of the feed pipe. It is characterized in that it has a V-shape and the apex of the protrusion coincides with the locus of the central axis of the feed pipe.

A coal inactivation processing apparatus according to a third aspect of the present invention that solves the above-described problem is the coal inactivation processing apparatus according to the first or second aspect of the invention described above, wherein the protrusion is formed of the protrusion. A shape that is symmetric with respect to a vertex and a plane that passes through the central axis of the feed pipe, and a straight line that connects the intersections of the two tangents of the feed pipe that pass through the top of the protrusion with the feed pipe, and The corner formed by one of the tangent lines is larger than the angle of repose.

A coal inactivation processing apparatus according to a fourth aspect of the present invention that solves the above-described problem is the coal inactivation processing apparatus according to any one of the first to third aspects of the invention described above, and is the apex of the protrusion. And the center axis of the feed pipe is not more than twice the radius of the feed pipe.

According to the coal deactivation processing apparatus according to the present invention, the outer periphery of the feed pipe is provided with a hat-shaped projection provided so as to project in the rotation direction of the feed pipe, and the feed pipe and the projection are The kiln body is arranged to pass through a coal layer in which the coal is deposited in the kiln body, while cooling the coal with cooling water circulating in the feed pipe, While stirring the coal by rotation, a predetermined amount of coal is lifted above the surface of the coal bed in the kiln body by the feed pipe and the protrusion, and dropped from above to stir the coal. The contact opportunity can be made suitable. Thereby, adsorption | suction of oxygen to the surface of coal can be performed efficiently, aiming at prevention of spontaneous combustion of coal. Furthermore, the overall length of the kiln main body can be shortened compared to the case where no protrusion is provided on the feed pipe, and the apparatus can be downsized.

It is a schematic block diagram of one Embodiment of the coal inactivation processing apparatus which concerns on this invention. It is the figure which expanded the II-II arrow cross section in FIG. It is an enlarged view of the feed pipe which the said coal inactivation processing apparatus comprises.

Although one embodiment of the coal inactivation processing apparatus according to the present invention will be described with reference to the drawings, the present invention is not limited to only the following embodiments described with reference to the drawings.

An embodiment of a coal inactivation processing apparatus according to the present invention will be described with reference to FIGS.

As shown in FIG. 1, a coal deactivation treatment apparatus 100 that deactivates dry-distilled coal 1 has a hopper 101 that receives dry-distilled coal 1, and a base end side that communicates with a delivery port of the hopper 101. And a screw feeder 102 that is a rotary conveying means that rotates and conveys the coal 1 in the hopper 101 from one end side (base end side) to the other end side (tip end side).

The distal end side of the screw feeder 102 communicates with the proximal end side of a cylindrical rotary kiln main body (kiln main body) 103. The base end side of the rotary kiln main body 103 is in communication with the base end side casing 111 via the sealing device 108. A gas receiving port 111 a for introducing the processing gas 13 is provided at the upper part of the base end side casing 111. The gas inlet 111a is connected to the distal end side of the processing gas supply pipe 121 that supplies the processing gas 13. A blower 127 and a heating device 128 are provided in the middle of the processing gas supply pipe 121.

The distal end side of the air supply pipe 122 that supplies the air 11 and the distal end side of the nitrogen supply pipe 123 that supplies the nitrogen gas 12 are connected to the proximal end side of the processing gas supply pipe 121. The base end side of the air supply pipe 122 is open to the atmosphere. The base end side of the nitrogen supply pipe 123 is connected to a nitrogen supply source 124 such as a nitrogen gas tank. In the middle of the air supply pipe 122 and the nitrogen supply pipe 123,

flow control valves

125 and 126 are provided, respectively.

The distal end side of the rotary kiln main body 103 communicates with the distal end side casing 112 via

seal devices

109a and 109b. A gas discharge port 112 a for discharging the used processing gas 14 is provided in the upper part of the front end side casing 112. The base end side of the processing gas discharge pipe 131 that discharges the used processing gas 14 is connected to the gas discharge port 112a. A temperature sensor 131 a is provided in the middle of the processing gas discharge pipe 131. A shooter 112b that drops and discharges the deactivated coal (modified coal) 3 is provided at the lower portion of the front end side casing 112.

An annular ridge 104 is provided on the distal end side and the proximal end side of the outer peripheral portion of the rotary kiln main body 103, and the ridge 104 is supported by a roller 105. A gear 106 that meshes with the gear 107 a of the driving electric motor 107 is provided on the outer peripheral portion of the rotary kiln main body 103. Therefore, when the gear 107a of the driving motor 107 is rotated, the rotary kiln main body 103 is rotated.

The coal inactivation processing apparatus 100 described above further includes a cooling device 140. The cooling device 140 includes a bearing 145 fixed to the side wall portion 103 a on the distal end side of the rotary kiln main body 103. The cooling device 140 includes a cooling water supply header 141 that is provided on the bearing 145 and to which the cooling water 21 is supplied from outside the system. A plurality of, for example, eight (see FIG. 2) feed pipes 142 (for example, double pipes) for feeding the coolant 21 are connected to the coolant feed header 141. The cooling device 140 includes a cooling water discharge header 146 that discharges the used cooling water 22 circulated through the supply pipe 142 to the outside of the system.

As shown in FIGS. 1 and 2, the plurality of feed pipes 142 are arranged in the rotary kiln main body 103 adjacent to each other at equal intervals in the circumferential direction of the rotary kiln main body 103. The plurality of feed pipes 142 is a coal layer formed by depositing coal 2 even when the filling rate of coal 2 into the rotary kiln body 103 is, for example, 10% to 15% when the rotary kiln body 103 rotates. It arrange | positions so that the distance D1 of the center axis | shaft C2 and the center axis | shaft C1 of the rotary kiln main body 103 may become the same. The plurality of feed pipes 142 extend in the rotary kiln main body 103 in parallel to the central axis C1 of the rotary kiln main body 103, and extend from the distal end side to the proximal end side of the rotary kiln main body 103. . Thereby, in the region where the coal 2 is inactivated by the processing gas 13 supplied into the rotary kiln main body 103, the temperature is adjusted so that the coal 2 does not spontaneously ignite by the cooling water 21 flowing in the feed pipe 142. Is done.

The plurality of feed pipes 142 are disposed so as to penetrate the side wall 103a of the rotary kiln main body 103. The plurality of feed pipes 142 are supported by support tools (not shown) arranged at a plurality of locations in the longitudinal direction. As a result, the plurality of feed pipes 142 rotate around the central axis C <b> 1 of the rotary kiln body 103 together with the rotary kiln body 103 as the rotary kiln body 103 rotates.

Here, the specifications of the feeding pipe 142 described above will be described with reference to FIGS.
In FIG. 2, A indicates the rotational direction of the rotary kiln body 103. L1 indicates a trajectory through which the central axis C2 of the plurality of supply pipes 142 passes, and L2 indicates a tangent to the trajectory L1. 2 and 3, L3 indicates a bisector of a protrusion 143 to be described later. In FIG. 3, L4 and L5 indicate tangent lines of the feed pipe 142 passing through the apex 143c of the protrusion 143. L11 indicates an auxiliary line passing through the contact point P1 between the feed pipe 142 and the tangent line L5 and the contact point P2 between the feed pipe 142 and the tangent line L4. L12 and L13 indicate auxiliary lines passing through the central axis C2 of the feed pipe 142 and the contacts P1 and P2, respectively. α is an acute angle formed by the bisector L3 and the tangent line L5 (inner plane portion 143a of the hat), and indicates the angle (hat angle) of the protrusion, and β is formed by the bisector L3 and the auxiliary line L12. It shows an acute angle. θ represents an acute angle formed by the tangent line L5 and the auxiliary line L11. The auxiliary lines L11, L12, and L13 form an isosceles triangle having the central axis C2 as an apex, and the auxiliary line L12 and the tangent line L5 form a right angle. Therefore, the angle β is the same size as the angle θ.

As shown in FIG. 2 and FIG. 3, the feed pipe 142 has a perfect circle in its radial cross section. A protrusion 143 having a hat shape is provided on the outer peripheral portion of the feed pipe 142 so as to project in the rotation direction A of the feed pipe 142. More specifically, the protrusion 143 has a V shape in the radial cross section of the feed pipe 142. Similar to the feed pipe 142, the protrusion 143 is configured so that when the rotary kiln main body 103 rotates, even if the filling rate of the coal 2 into the rotary kiln main body 103 is, for example, 10% to 15%, It is arranged at a position that passes through the coal bed that is deposited.

The protruding portion 143 includes an inner flat surface portion 143a positioned on the central axis C1 side of the rotary kiln main body 103 and an outer flat surface portion 143b positioned on the outer peripheral surface side of the rotary kiln main body 103. The distal end side of the inner plane portion 143a and the outer plane portion 143b is connected. The apex 143c of the protrusion 143 is positioned at a position that coincides with the locus of the central axis C2 of the feed pipe 142. As a result, the amount of coal lifted above the coal bed surface 2a by the feed pipe 142 and the protrusion 143 can be reduced as compared with the case where there is no hat-shaped protrusion, so that a suitable state can be obtained. The contact opportunity between the coal 2 and the processing gas 13 by stirring is in a suitable state, and the efficiency of the inactivation processing of the coal 2 can be improved.

The inner plane portion 143a and the outer plane portion 143b are arranged symmetrically on a plane passing through the tip portion 143c of the protrusion 143 and the central axis C2. That is, the protrusion 143 has a shape that is plane-symmetric. Further, a corner portion θ formed by a straight line L11 connecting the intersections P2, P1 of the two tangents L4, L5 of the feed pipe 142 passing through the apex 143c of the projection 143 and the feed pipe 142 and one of the tangent lines L5. However, it is larger than the angle of repose. This is because if the corner portion θ is smaller than the angle of repose, the amount of coal 2 on the protrusion 143 increases, promoting the pulverization of the coal 2 and reducing the yield of the deactivated coal 3. It is because it will let you.

The distance D2 between the tip 143c of the protrusion 143 and the central axis C2 of the feed pipe 142 is preferably less than or equal to twice the radius of the feed pipe 142, and more preferably less than or equal to one. This is because when the distance D2 exceeds the upper limit value, the heat transfer area between the cooling water 21 and the coal 2 in the feed pipe 142 decreases, the heat exchange rate decreases, and the rotary kiln main body 103 This is because a large number of space portions are formed between the projection 143 and the feed pipe 142, and the amount of treated coal is reduced.

In addition, as the feed pipe 142 and the protrusion 143, it is possible to use one made of a material having no reactivity with the coal 2 and having heat resistance, for example, steel.

Further, in the above-described coal deactivation processing apparatus 100, the radius r2 of the feed pipe 142 and the distance D1 between the central axis C1 of the rotary kiln main body 103 and the central axis C2 of the feed pipe 142 are expressed by the following relational expression (1 ) Is more preferable.

1 / 50D1 <r2 <1 / 10D1 ... (1)

When the radius r2 of the feed pipe 142 is 1 / 10D1 (1/10 of D1) or more, the pipe diameter of the feed pipe 142 is too large with respect to the thickness of the coal layer in the rotary kiln body 103. Since the flow of coal 2 becomes large, pulverization of coal 2 will be promoted. On the other hand, when the radius r2 of the feed pipe 142 is 1/50 D1 (1/50 of D1) or less, the feed pipe 142 is thin, and if many feed pipes 142 are not installed in the two layers of coal, It becomes impossible to exchange, and not only the equipment cost increases, but also the supply water pressure of the cooling water 21 to the feed pipe 142 becomes high, and more power is consumed. Therefore, by satisfy | filling above-mentioned (1) Formula, pulverization of the coal 2 can be suppressed and an increase in equipment cost and an increase in power consumption can be suppressed.

In the above-described coal deactivation processing apparatus 100, it is more preferable that the distance D3 between the

adjacent feed pipes

142 and 142 satisfies the following expression (2).

2r2 <D3 <6r2 ... (2)

When the distance D3 between the

adjacent feed pipes

142 and 142 is 2r2 (twice the radius r2 of the feed pipe 142), the

adjacent feed pipes

142 and 142 are too close and the coal 2 is adjacent. Bridge between the feeding

pipes

142 and 142. On the other hand, when the distance D3 between the

adjacent feed pipes

142, 142 is 6r2 (6 times the radius r2 of the feed pipe 142) or more, the transmission between the cooling water 21 in the feed pipe 142 and the coal 2 is performed. Since the heat area decreases, the cooling heat transfer area of the coal 2 cannot be secured. Therefore, by satisfying the above equation (2), it is possible to suppress the occurrence of a bridge between the

adjacent feed pipes

142 and 142, and the cooling transmission of the coal 2 by the cooling water 21 in the feed pipe 142. A heat area can be secured.

In this embodiment, the processing gas supply pipe 121, the heating device 128, the blower 127, the air supply pipe 122, the flow rate adjustment valve 125, the nitrogen supply pipe 123, the flow rate adjustment valve 126, The nitrogen supply source 124, the base end side casing 111, the gas receiving port 111a, and the like constitute processing gas supply means. The cooling water feed header 141, the feed pipe 142, the projection 143, the bearing 145, the cooling water discharge header 146, and the like constitute the cooling device 140 that forms a cooling means. The ridge 104, the roller 105, the gear 106, the drive motor 107, the gear 107a, and the like constitute a rotating means. The hopper 101, the screw feeder 102, and the like constitute coal supply means. The shooter 112b and the like of the front end side casing 112 constitute coal discharging means. The front end side casing 112, the gas discharge port 112a, the processing gas discharge pipe 131, and the like constitute processing gas discharge means. Each means, the rotary kiln main body 103, the sealing

devices

108, 109a, 109b, etc. constitute the coal inactivation processing device 100.

Next, the operation that is the center of the above-described coal deactivation processing apparatus 100 will be described.

When the coal 1 is supplied to the hopper 101, the coal 1 is conveyed into the rotary kiln main body 103 by the screw feeder 102. On the other hand, while controlling the operation of the blower 127, the air 11 and the nitrogen gas 12 are supplied to the processing gas supply pipe 121 via the air supply pipe 122 and the nitrogen supply pipe 123 by controlling the opening degree of the flow

rate adjusting valves

125 and 126. Supplied. As a result, the air 11 and the nitrogen gas 12 are mixed to become the processing gas 13 (for example, the oxygen concentration is about 5 to 10%). The processing gas 13 is heated by the heating device 128 based on the temperature data of the used processing gas 14 obtained by the temperature sensor 131a, and adjusted to be 40 ° C. to 200 ° C. in the rotary kiln main body 103. A gas supply pipe 121 supplies the rotary kiln main body 103 through the gas receiving port 111a.

The rotary kiln main body 103 rotates when the gear 107 a of the driving motor 107 rotates and is transmitted via the gear 106. As the rotary kiln main body 103 rotates, the coal 2 conveyed into the rotary kiln main body 103 moves from the proximal end side to the distal end side of the rotary kiln main body 103 while being stirred. At this time, the coal 2 in the rotary kiln main body 103 adsorbs the oxygen of the processing gas 13 supplied into the rotary kiln main body 103. In this way, the inactivated coal (reformed coal) 3 is obtained by oxygen adsorption, and is carried out of the system via the shooter 112b. Although the coal 2 in the rotary kiln main body 103 generates heat by adsorbing oxygen in the processing gas 13, the coal 2 is adjusted to a temperature at which the coal 2 does not spontaneously ignite by the cooling water 21 flowing through the feed pipe 142.

The used processing gas (about 50 ° C. to 70 ° C.) 14 used for the inactivation processing of the coal 2 in the rotary kiln main body 103 circulates in the same direction as the transport direction of the coal 2, and the rotary kiln main body 103 The gas flows from the gas discharge port 112 a of the front end side casing 112 provided on the front end side to the process gas discharge pipe 131 and is discharged out of the system through the process gas discharge pipe 131.

Here, in the above-described coal deactivation processing apparatus 100, the rotary kiln main body 103 rotates with the rotary kiln main body 103 around the central axis C <b> 1 of the rotary kiln main body 103, and the rotary kiln main body 103 rotates. A plurality of feed pipes 142 are provided in the rotary kiln body 103 so as to pass through the coal bed formed by depositing the coal 2 supplied into the main body 103, and the projections 143 are provided on the feed pipes 142. In addition, it operates as follows.

That is, in this embodiment, when the plurality of feed pipes 142 rotate around the central axis C1 of the rotary kiln main body 103 as the rotary kiln main body 103 rotates and pass through the coal bed, The coal 2 is lifted above the coal bed surface 2a by the 142 and the protrusions 143. At this time, by providing the projecting portion 143 on the feed pipe 142, a smaller amount of coal 2 is lifted above the coal bed surface 2a than is lifted at the angle of repose of the feed pipe 142. Therefore, by providing the protrusion 143, pulverization of the coal 2 due to excessive stirring of the coal 2 can be suppressed.

Therefore, according to the coal deactivation processing apparatus 100 according to the present embodiment, the outer periphery of the feed pipe 142 includes the protrusion 143 provided to project in the rotation direction A of the feed pipe 142, and the feed pipe 142 and the protrusion 143 are arranged so as to pass through a coal bed in which the coal 2 is deposited in the rotary kiln main body 103 when the rotary kiln main body 103 rotates, and thereby circulate in the feed pipe 142. While the coal 2 is being cooled by the cooling water 21 to be stirred, the coal 2 is agitated by the rotation of the rotary kiln main body 103, and a predetermined amount of the coal 2 is fed into the coal layer in the rotary kiln main body 103 by the feed pipe 142 and the protrusion 143. The coal 2 is stirred by being lifted upward from the surface 2a and dropped from above, and the contact opportunity between the coal 2 and the processing gas 13 can be made suitable. Thereby, adsorption | suction of oxygen to the surface of coal 2 can be performed efficiently, aiming at prevention of spontaneous ignition of coal 2. Furthermore, the overall length of the rotary kiln main body 103 can be shortened compared to the case where no hat-shaped protrusion is provided on the feed pipe, and the apparatus can be downsized.

[Other Embodiments]
Note that the shape of the protrusion 143 provided in each of the plurality of supply pipes 142 is not limited to one type, and may be two or more types.

In the above description, the coal inactivation processing apparatus 100 including the eight supply pipes 142 has been described. However, the number of the supply pipes is not limited to eight, and seven or less or nine or more supply pipes are used. It is also possible to provide a coal inactivation treatment apparatus.

1,2,3 coal, 11 air, 12 nitrogen gas, 13,14 treatment gas, 21,22 cooling water, 100 coal deactivation treatment device, 101 hopper, 102 screw feeder, 103 rotary kiln body (kiln body), 104 ridges, 105 rollers, 106 gears, 107 driving motors, 107a gears, 108 sealing devices, 109a and 109b sealing devices, 111 proximal casings, 111a gas inlets, 112 distal casings, 112a gas outlets, 112b shooter, 121 processing gas supply pipe, 122 air supply pipe, 123 nitrogen supply pipe, 124 nitrogen supply source, 125, 126 flow control valve, 127 blower, 128 heating device, 131 processing gas discharge pipe, 131a temperature sensor, 140 cooling Equipment, 141 Cooling water feed header, 142 Feed pipe, 143 Protrusion, 143a Inner plane, 143b Outer plane, 143c Apex, 145 bearing, 146 Coolant discharge header, A Rotary direction of rotary kiln body, C1 rotary Kiln body center axis, C2 feed pipe center axis, D1 distance between rotary kiln body center axis and feed pipe center axis, D2 between top of projection and feed pipe center axis Distance, D3 Distance between adjacent feeding pipes, L1 Trajectory of the central axis of the feeding pipe, L2 Tangent line of the central axis of the feeding pipe, L3 bisector, L4, L5 L1, auxiliary line, L12, line passing through point P1 and the central axis C2 of the feed pipe, L13, line passing through point P2 and the central axis C2 of the feed pipe, P1, P2 contact point, r1 rotor Radius of kiln body, the radius of r2 delivery line, the angle of α projections (hat angle), the angle of θ line L5 and line L11, the angle of β line L3 and the line L12

Claims

In a coal inactivation treatment apparatus that inactivates coal with a treatment gas containing oxygen,
The coal and the processing gas are supplied to the inside, and a kiln main body provided rotatably,
A feed pipe that is rotatably provided with the kiln body, is provided extending in the longitudinal direction of the kiln body, and in which cooling water flows.
A protrusion that is provided on the outer periphery of the feed pipe so as to protrude in the rotation direction of the feed pipe and has a hat shape in the radial cross section of the feed pipe;
The coal inactivation is characterized in that the feed pipe and the protrusion are arranged so as to pass through a coal layer in which the coal is deposited in the kiln body when the kiln body rotates. Processing equipment.
A coal inactivation processing apparatus according to claim 1,
The protrusion is V-shaped in the radial cross section of the feed pipe,
The coal inactivation processing apparatus according to claim 1, wherein a vertex of the protrusion coincides with a locus of a central axis of the feed pipe.
A coal inactivation treatment apparatus according to claim 1 or claim 2,
The protrusion is symmetrical in a plane passing through the apex of the protrusion and the central axis of the feed pipe,
A corner formed by a straight line connecting the intersections of the two tangents of the feed pipe passing through the apex of the protrusion and the feed pipe and one of the tangents is larger than a repose angle. Coal deactivation processing equipment.
A coal inactivation treatment apparatus according to any one of claims 1 to 3,
The coal inactivation processing apparatus characterized in that a distance between the apex of the protrusion and the central axis of the feed pipe is not more than twice the radius of the feed pipe.