CN111378508A - Rotary coal distribution device of gasification furnace - Google Patents

Abstract

The invention relates to a rotary coal distribution device of a gasification furnace, which comprises a coal distribution box body, wherein the top of the coal distribution box body is provided with a main driver, a top plate of the coal distribution box body is provided with a coal collection pipe, a coal distribution rotary drum is sleeved outside the coal collection pipe, and the coal distribution rotary drum is in transmission connection with the main driver through a transmission gear; the lower part of the coal distribution box body is provided with a water seal tank, the bottom of the coal distribution box body is provided with a coal dropping throat pipe, and the bottom end of the coal distribution rotary drum extends into the water seal tank; the coal chute assembly is arranged below the coal dropping throat pipe and is mounted on the coal distribution rotary drum through a pair of crank arms, the upper portion of each crank arm is provided with a tilting trunnion, the end portion of each tilting trunnion is provided with a tilting gear, and a pair of drivers are in driving connection with the tilting trunnions. The invention can realize the uniform spreading of the coal bed, and can realize various coal distribution modes such as concentric coal distribution, spiral coal distribution, sector coal distribution, fixed-point coal distribution and the like; greatly reduces the furnace deflection phenomenon of the gasification furnace, reduces the energy consumption of the gasification furnace and reduces the labor intensity.

Description

Rotary coal distribution device of gasification furnace

Technical Field

The invention relates to the technical field of coal gasification, in particular to a rotary coal distribution device of a gasification furnace.

Background

In the prior art, a coal distributing mode of a coal gasifier uses a coal lock, and Chinese patent 201810091390.6 discloses a coal lock, wherein in the prior art, coal in a coal locking period enters a coal lock at the lower part of a chute through a coal lock coal supply chute connected with two outlets of a coal bunker by means of gravity, then falls onto a fixed coal distributor through the coal lock, and finally falls into the furnace. The coal lock in the prior art is divided into an upper valve and a lower valve, the upper valve is sealed by a spherical surface, leakage is easy, the operation period is short, and parking accidents are easy to cause. And the coal lock is the key for controlling the operation of the gasification furnace, and the gasification furnace is frequently stopped in a chain manner due to the error of an operator of the coal lock. The fixed coal distributor can cause uneven coal distribution in the furnace due to uneven coal blocks and other reasons in use, and the fixed coal distributor can not adjust the coal falling surface in the operation of equipment, so that the gasification in the gasification furnace is uneven, the gasification condition is poor, the gasification is incomplete, the carbon content of ash slag is increased, and the energy is wasted. And the fixed coal distributor is washed by fallen coal for a long time and is easy to wear and drop, thereby causing the parking maintenance and increasing the labor intensity of workers. Therefore, it is necessary to provide a new rotary coal distribution device for gasification furnace to overcome the above-mentioned drawbacks.

Disclosure of Invention

The invention aims to provide a rotary coal distribution device of a gasification furnace, which comprises a coal distribution box body, wherein the top of the coal distribution box body is provided with a main driver, a top plate of the coal distribution box body is provided with a coal collecting pipe, a coal distribution rotary drum is sleeved outside the coal collecting pipe, the lower part of the coal distribution box body is provided with a water seal tank, and the coal distribution rotary drum is connected with a coal dropping throat pipe to form a sliding water seal; the coal chute assembly is mounted to the coal distribution drum by a pair of crank arms. The invention can realize multiple coal distribution modes such as concentric circle track coal distribution, spiral line track coal distribution, sector surface coal distribution, fixed point coal distribution and the like, so that the coal distribution mode has adjustability, the energy consumption of the gasification furnace is reduced, and the labor intensity is reduced.

The purpose of the invention is realized by the following technical scheme: a rotary coal distribution device of a gasification furnace comprises a coal distribution box body, wherein a main driver is arranged at the top of the coal distribution box body, a coal collection pipe is arranged on the top plate of the coal distribution box body, the lower part of the coal collection pipe extends into the coal distribution box body, a coal distribution rotary drum is sleeved on the outer side of the coal collection pipe, and the coal distribution rotary drum is in transmission connection with the main driver through a transmission gear; the coal distribution box body is provided with a water seal tank at the lower part, the bottom of the coal distribution box body is provided with a coal dropping throat pipe, the top end of the coal dropping throat pipe extends upwards to pass through the water seal tank and extend into the coal distribution rotary drum, and the bottom end of the coal distribution rotary drum extends into the water seal tank, so that a sliding water seal is formed by connection; the coal distributing device is characterized in that a coal sliding bucket assembly is arranged below the coal dropping throat pipe, the coal sliding bucket assembly is mounted on the coal distributing rotary drum through a pair of crank arms, a tilting trunnion is arranged at the upper part of each crank arm, a tilting gear is arranged at the end part of each tilting trunnion, and an auxiliary driver is in driving connection with the tilting gear.

Compared with the prior art, the invention has the following advantages:

1. the coal distributing rotary drum drives the coal sliding hopper assembly to rotate for distributing coal, so that coal beds in the gasification furnace can be uniformly spread.

2. The main driver and the auxiliary driver in the invention act cooperatively, and various coal distribution modes such as concentric circle track coal distribution, spiral track coal distribution, sector surface coal distribution, fixed point coal distribution and the like can be realized.

3. The bottom plate of the chute body of the coal chute is provided with the hard alloy roller, so that the wear resistance and impact resistance of the coal chute assembly are greatly improved, and the service life of the coal chute assembly is greatly prolonged.

4. During the operation process of the invention, the adjustability of the coal distribution form can be realized, the furnace deflection phenomenon of the gasification furnace is greatly reduced, the energy consumption of the gasification furnace is reduced, the operation condition of workers is improved, and the labor intensity is reduced.

Drawings

The invention is further explained with reference to the drawings and the embodiments.

FIG. 1 is a schematic structural view of a rotary coal distribution device of the present invention;

FIG. 2 is a schematic view of a first drive configuration of the coal chute assembly of the present invention;

FIG. 3 is a schematic view of a second drive configuration of the coal chute assembly of the present invention;

FIG. 4 is a schematic view of the roller arrangement of the coal chute assembly of the present invention;

fig. 5 is a schematic view of the coal chute assembly transverse coal breaker of the present invention.

Detailed Description

The first embodiment is as follows:

referring to fig. 1 and 2, the rotary coal distribution device of the gasification furnace of the invention comprises a coal distribution box 1, a main driver 4 is arranged on the top of the coal distribution box, a coal collecting pipe 2 is arranged on the top plate of the coal distribution box, the lower part of the coal collecting pipe extends into the coal distribution box, a coal distribution rotary drum 9 is sleeved on the outer side of the coal collecting pipe, and the coal distribution rotary drum is in transmission connection with the main driver through a transmission gear; the lower part of the coal distribution box body is provided with a water seal tank 5, the bottom of the coal distribution box body is provided with a coal dropping throat pipe 7, the top end of the coal dropping throat pipe upwards extends through the water seal tank and extends into the coal distribution rotary drum, and the bottom end of the coal distribution rotary drum extends into the water seal tank, so that a sliding water seal is formed by connection; the coal chute assembly 8 is arranged below the coal dropping throat pipe, the coal chute assembly is mounted on the coal distribution rotary drum through a pair of crank arms 803, the upper portion of each crank arm is provided with a tilting trunnion, the end portion of each tilting trunnion is provided with a tilting gear, and an auxiliary driver is in driving connection with the tilting gear.

In this embodiment, the coal distribution box is a rectangular box (or a cylindrical box) made of steel plates, and has a box top plate 101, a box bottom plate 103, and box side plates 102, and the coal distribution box is mounted together with the top of the gasification furnace through the box bottom plate. In order to facilitate maintenance and installation, the side plates of the box body can be provided with a manhole and a vent hole. The water seal tank at the lower part of the coal distribution box body is provided with a water inlet, a water outlet, a water level controller and a water temperature controller, preferably adopts flowing circulating water, and is communicated with the cooling water tank through a water inlet pipeline and a water outlet pipeline to provide circulating water for the water seal tank. The water seal pool has two functions and advantages, firstly, high-temperature hot gas in the gasification furnace is prevented from directly entering the coal distribution box body through the coal dropping throat pipe, and secondly, high temperature in the gasification furnace is prevented from being transmitted into the coal distribution box body through the box body bottom plate, so that the coal distribution box body is overheated inside, and the normal work of a driver and a transmission system is influenced. The water inlet, the water outlet, the water level controller and the water temperature controller on the water seal pool belong to the prior art, are not shown in the figure and are not described in detail.

In this embodiment, the main driver installed on the top of the coal distribution box (i.e., the top plate 101 of the box) includes a driving motor, a reducer, and a controller, an output shaft end of the reducer extends into the coal distribution box, and a driving pinion 401 is installed at the output shaft end and is engaged with a transmission gear 901 on the coal distribution drum to control the forward rotation, the reverse rotation, and the stop (including the locking) of the coal distribution drum. The driving motor, the speed reducer and the controller belong to the prior art and are not described in detail.

In this embodiment, the coal collecting pipe 2 is installed on the top plate 101 of the coal distribution box, the lower portion of the coal collecting pipe extends into the coal distribution box, the coal collecting pipe is fixed to the top plate of the box, the upper end of the coal collecting pipe is connected with the coal supply mechanism (the connection structure belongs to the prior art, and is not shown in the figure), the lower end of the coal collecting pipe and the coal dropping throat pipe are aligned on a vertical central line, and the coal collecting pipe and the coal dropping throat pipe are all steel round pipes. The coal distributing rotary drum 9 is sleeved outside the coal collecting pipe, the coal distributing rotary drum can rotate relative to the coal collecting pipe, and a mechanical seal is arranged between the coal distributing rotary drum and the coal collecting pipe; the coal distribution rotary drum is fixedly provided with a large-diameter transmission gear 901, the coal distribution rotary drum is arranged on a side plate of the coal distribution box body through a bearing and a horizontal bracket 3 (the structural form and the installation form of the bearing used by the coal distribution rotary drum belong to the prior art), and a main driver controls the coal distribution rotary drum to rotate forwards, reversely and stop (including locking). The upper part of the coal distributing rotary drum is sleeved outside the coal collecting pipe, and the bottom end of the coal distributing rotary drum extends into the water seal tank, namely the bottom port of the coal distributing rotary drum extends below the water level of the water seal tank.

In the embodiment, the coal dropping throat pipe 7 is arranged at the bottom of the coal distributing box body, the coal dropping throat pipe is a steel round pipe, and the coal dropping throat pipe, the coal collecting pipe and the coal distributing rotary drum are arranged on the same vertical central line. The top end of the coal dropping throat pipe extends into the coal distributing rotary drum, and the top end of the coal dropping throat pipe is higher than the horizontal plane of the water seal tank. The bottom end of the coal dropping throat pipe is fixed on a box body bottom plate 103 of the coal distribution box body. The rotatable coal distributing rotary drum and the static coal dropping throat pipe are mutually connected up and down to form a sliding water seal.

In this embodiment, a coal chute assembly 8 is disposed below the coal chute, and includes a coal chute body, a crank arm, and a coal breaking mechanism, where the coal chute body is in a chute shape and is composed of a bottom plate and two side plates (sidewalls), a pair of crank arms 803 is fixed on the upper portion of the coal chute body, a plurality of coal breaking mechanisms are disposed on the bottom plate, the lower ends of the crank arms are fixed with the coal chute body, a tilting trunnion 804 is disposed on the upper end of the crank arm, a pair of shaft holes are correspondingly disposed on the coal distribution drum, the tilting trunnion is mounted in the shaft hole, a tilting gear 805 is fixedly mounted at the end of the tilting trunnion, the tilting trunnion extends from the inner wall of the coal distribution drum to the outer wall of the coal distribution drum, and a tilting gear is fixedly mounted at the end of the tilting gear, where the tilting gear may be a large-diameter sector gear or a circular disk gear. A secondary drive 6 is drivingly connected to the tilt gear 805 on the tilt trunnion. In the embodiment of the invention, the auxiliary driver is used for adjusting and maintaining the inclination angle of the chute body of the coal chute, thereby realizing different coal distribution modes.

In this embodiment, the installation position of the sub-driver can take various forms, two forms are preferred in this embodiment, referring to fig. 2 (fig. 2 is a sectional view a-a in fig. 1), and in a first preferred form, the sub-driver 6 is installed on the coal distribution drum (on the outer wall surface of the coal distribution drum), the sub-driver moves along with the coal distribution drum, and the sub-driver includes a controller, a motor, a speed reducer, an output shaft, and a driving gear 601, and the driving gear 601 is in meshing transmission with the tilting gear 805. The control signal transmission and the power transmission of the secondary driver can be supplied by a slide wire mode in the prior art (not described in detail), and the controller, the motor and the speed reducer belong to the prior art and are not described in detail. The auxiliary driver drives the chute body of the coal chute to change the inclination angle of the chute body by taking the tilting trunnion as an axis and lock the chute body at a certain working angle, so as to change the falling radius and the falling point of the coal. Referring to fig. 3 (fig. 3 is a sectional view taken along line a-a of fig. 1), in a second preferred form, a sub-drive is mounted on the side plate 102 of the coal distribution box, and the sub-drive 602 includes a controller, a motor, a reducer, an output shaft, and a driving gear 603; the driving gear 603 is mounted on a moving mechanism for separating and engaging the driving gear 603 and the tilting gear 805. When the inclination angle of the chute body of the coal chute needs to be changed, the coal distribution rotary drum stops rotating, the driving gear 603 moves to the meshing position of the tilting gear 805 (moves towards the right side in the figure), meshing of the two gears is realized, and then the chute body of the coal chute is driven to change the inclination angle. When the coal distribution drum rotates, the driving gear 603 moves towards the reset direction (moves towards the right side in the figure), and the driving gear 603 is disengaged from the tilting gear 805; the chute body of the coal chute is locked at a certain working angle through a locking mechanism of the chute body. The moving mechanism in this embodiment may adopt a gear set moving structure in a manual transmission of an automobile, which belongs to the prior art and is not described in detail. The two driving modes are that the chute body of the coal chute is driven to change the inclination angle of the chute body by taking the tilting trunnion as the axis, and the falling radius and the falling point of the coal are changed. In the embodiment, the moving mechanism and the locking mechanism belong to the field of the prior art, and are not described in detail.

In the embodiment of the invention, the main driver drives the coal distribution rotary drum to rotate, the chute body of the coal sliding hopper rotates along with the coal distribution rotary drum, and concentric-circle coal distribution can be realized, wherein the chute body of the coal sliding hopper has different inclined angles, and the coal distribution radiuses of the concentric-circle coal distribution are different. When the coal distributing rotary drum rotates, the auxiliary driver drives the chute body of the coal sliding hopper to tilt (incline) to realize spiral coal distribution, the main driver and the auxiliary driver simultaneously carry out different operation operations, and various coal distribution modes such as concentric circle coal distribution, spiral coal distribution, sector coal distribution, fixed point coal distribution and the like can be realized, the uniform spreading of a coal bed is realized, the adjustability of the coal distribution mode is realized, the furnace deviation phenomenon of the gasification furnace is greatly reduced, the energy consumption of the gasification furnace is reduced, the operation condition of workers is improved, and the labor intensity is reduced. The technical contents disclosed in the embodiments are not limited to the embodiments, but should also belong to the technical contents of the present invention.

Example two:

the present embodiment is an improvement on the basis of the first embodiment, and the same portions in the present embodiment as those in the first embodiment should be understood by referring to the content disclosed in the first embodiment, and will not be described repeatedly herein; the disclosure in the first embodiment should also be regarded as the disclosure in the present embodiment.

Referring to fig. 4, in this embodiment, the coal chute assembly includes a coal chute body, the coal chute body is composed of a bottom plate 802 and two side plates 801, the bottom plate is provided with a plurality of rows of horizontally arranged hard alloy rollers 806, and a plurality of supporting baffles are arranged between two adjacent rows of hard alloy rollers.

The coal chute assembly comprises a coal chute groove body, crank arms and a coal crushing mechanism, the coal chute groove body is in a chute shape, a pair of crank arms 803 are fixed on the upper portion of the coal chute groove body, the lower ends of the crank arms are fixed with the coal chute groove body, the upper ends of the crank arms are fixedly inclined to form trunnions, a plurality of coal crushing mechanisms are arranged on the bottom plate, and the coal crushing mechanisms can be multi-row transverse hard alloy rollers. The cemented carbide roller may be preferably made of cemented carbide materials such as YG8, YG15, YG20 in the prior art. The hard alloy roller can further crush the coal blocks falling in the coal feeding process.

The carbide cylinder includes cylindrical cylinder body, support, bearing, and the bottom plate installation is pressed close to this cylinder, and the support is passed through at both ends and two curb plates are fixed, and the cylinder body can be for the nimble rotation of bottom plate of swift current coal scuttle cell body, and the coal cinder that falls into swift current coal scuttle cell body can be cut apart to the supporting baffle and is dredged, prevents that it from piling up in the swift current coal scuttle cell body or the jam is between two cylindrical cylinder bodies. And 10 supporting baffles are arranged between two adjacent rows of rollers. Coal blocks can be reserved in gaps among the hard alloy rollers, so that the coal blocks and the coal blocks are impacted and rubbed in the coal feeding process, the hard alloy rollers are prevented from being directly impacted, if certain abrasion occurs to the cylindrical roller body, the installation angle between the hard alloy rollers and the bottom plate can be adjusted, the hard alloy rollers are uniformly abraded, and the service life is prolonged. In order to prevent the two side plates of the chute body from being worn, a vertical hard alloy roller 807 is mounted on the two side plates, and the vertical hard alloy roller is vertically mounted with the bottom plate of the chute body. The vertical hard alloy roller can flexibly rotate relative to the side plate of the chute body of the coal chute.

In this embodiment, the upper part of the chute body of the coal chute is a coal dropping area, and the lower part of the chute body of the coal chute is a coal sliding area, wherein the coal dropping area is provided with a double-layer hard alloy roller. The purpose of setting up double-deck carbide cylinder is to increase the shock resistance of coal slip bucket cell body, increases life. The technical contents disclosed in the embodiments are not limited to the embodiments, but should also belong to the technical contents of the present invention.

Example three:

the present embodiment is an improvement on the basis of the first embodiment and the second embodiment, and the same portions in the present embodiment as those in the first embodiment and the second embodiment should be understood by referring to the disclosure in the foregoing embodiments, and will not be described repeatedly herein; the disclosure in the foregoing embodiments should also be regarded as the disclosure in this embodiment.

Referring to fig. 5, in this embodiment, the coal chute assembly includes a coal chute body, the coal chute body is composed of a bottom plate and two side plates, and a plurality of rows of horizontal coal crushing ridges 808 are disposed on the bottom plate of the coal chute body, and the coal crushing ridges are in a triangular prism shape. The cross section of the crushed coal sills is of an isosceles triangle structure (isosceles right triangle), the right-angle sides of the crushed coal sills are perpendicular to the bottom plate of the chute body, the interval between two adjacent rows of the crushed coal sills is 30-50 mm, the height of the crushed coal sills is 30-50 mm, and a plurality of supporting baffles are arranged between two adjacent rows of the crushed coal sills. Coal blocks can be reserved between two adjacent rows of crushed coal banks, and impact and friction between the coal blocks and the coal blocks in the coal feeding process can be realized, so that the coal feeder is impact-resistant and wear-resistant. The broken coal bank in this embodiment belongs to one of broken coal mechanism, and broken coal bank can further smash the coal cinder of adding the coal in-process whereabouts. The technical contents disclosed in the embodiments are not limited to the embodiments, and should also belong to the technical contents of the present invention.

Claims (6)

1. The utility model provides a rotatory coal distribution device of gasifier, has a coal distribution box (1), its characterized in that: a main driver (4) is installed at the top of the coal distribution box body, a coal collecting pipe (2) is installed on the top plate of the coal distribution box body, the lower part of the coal collecting pipe extends into the coal distribution box body, a coal distribution rotary drum (9) is sleeved on the outer side of the coal collecting pipe, and the coal distribution rotary drum is in transmission connection with the main driver through a transmission gear; the lower part of the coal distribution box body is provided with a water seal tank (5), the bottom of the coal distribution box body is provided with a coal dropping throat pipe (7), the top end of the coal dropping throat pipe extends upwards to pass through the water seal tank and extend into the coal distribution rotary drum, and the bottom end of the coal distribution rotary drum extends into the water seal tank, so that a sliding water seal is formed by connection; the coal distributing device is characterized in that a coal sliding bucket assembly (8) is arranged below the coal dropping throat pipe, the coal sliding bucket assembly is installed on the coal distributing rotary drum through a pair of crank arms, a tilting trunnion is arranged on the upper portion of each crank arm, a tilting gear is arranged at the end portion of each tilting trunnion, and an auxiliary driver is in driving connection with the tilting gear.

2. The rotary coal distribution device of a gasification furnace according to claim 1, characterized in that: the auxiliary driver is installed on the coal distribution rotary drum.

3. The rotary coal distribution device of a gasification furnace according to claim 1, characterized in that: the auxiliary driver is installed on a side plate of the coal distribution box body.

4. The rotary coal distribution device of a gasification furnace according to claim 2 or 3, characterized in that: the coal chute assembly comprises a coal chute groove body, the coal chute groove body is composed of a bottom plate and two side plates, a plurality of rows of horizontally arranged hard alloy rollers are arranged on the bottom plate, and a plurality of supporting baffle plates are arranged between two adjacent rows of hard alloy rollers.

5. The rotary coal distribution device of a gasification furnace according to claim 4, characterized in that: the upper part of the chute body of the coal sliding hopper is a coal falling area, the lower part of the coal falling area is a coal sliding area, and the coal falling area is provided with a double-layer hard alloy roller.

6. The rotary coal distribution device of a gasification furnace according to claim 2 or 3, characterized in that: the coal chute assembly comprises a coal chute body, the coal chute body is composed of a bottom plate and two side plates, and a plurality of transverse rows of crushed coal ridges are arranged on the bottom plate of the coal chute body and are triangular prism-shaped.

Images