CN218763415U - Rotary drum type garbage incinerator - Google Patents

Abstract

The utility model discloses a rotary drum formula waste incinerator, include: a hearth having a feed inlet; the drum-type fire grate is arranged in the hearth and is arranged in a direction from one end of the feeding hole to the other end of the feeding hole in a downward inclined mode, and the drum-type fire grate comprises a plurality of rollers capable of rotating forwards and reversely along the axial direction. The utility model discloses a cylinder on the drum-type grate can be according to its position of arranging and the calorific value that needs burning rubbish is nimble adjusts pivoted direction, speed and angle to adapt to the burning of various operating modes, different calorific value rubbish, realize wide load msw incineration. The utility model discloses a set up the cylinder into the cylinder that can just reverse, can guarantee that low calorific value rubbish burns completely under the prerequisite that does not set up the drying grid of preheating, can be when rubbish calorific value is great again for msw incineration speed.

Description

Rotary drum type garbage incinerator

Technical Field

The utility model relates to a waste incinerator technical field especially relates to a rotary drum formula waste incinerator.

Background

With the increase of population, industrial development and acceleration of urbanization process, the production amount of domestic garbage is increased day by day, and the yield of domestic garbage can reach 2.1 hundred million tons according to statistics. The domestic garbage has the characteristics of high moisture content, large quantity and complex composition, and if the domestic garbage is not properly treated, the human health and the environment are harmed, the climate change is aggravated, and the urban domestic garbage treatment becomes one of the key points of the environmental protection work.

The conventional harmless garbage treatment modes in the prior art mainly comprise landfill, incineration, composting and the like. Along with the gradual reduction of land resources, technological progress and innovation, the quality of domestic garbage is continuously improved, and the burning method is more practical and novel as a resource treatment mode and has the advantages. In cities with developed economy, qualified domestic garbage heat value and free and tense land, the incineration treatment technology can be developed in an increased way.

The mechanical grate is stable in burning operation, large in garbage treatment capacity and strong in adaptability to the change characteristics and change of garbage, so that the mechanical grate is the mainstream garbage burning technology at present, and the incinerator with the largest single-furnace treatment capacity is also the mechanical grate incinerator. The common grate furnaces include a reciprocating grate furnace, a chain grate furnace, a roller grate furnace, etc.

As shown in fig. 1, in the prior art, a scale type garbage incineration roller grate is disclosed, a grate 01 is formed by a plurality of rollers 02 to form a grate surface with an inclination angle of 10-60 degrees, a certain shaft is arranged on the rollers 02 to install rotatable grate segments, and the grate segments are interwoven into scale shapes.

In order to adapt to the incineration of garbage with low calorific value, the prior art discloses a garbage incinerator with a roller grate, wherein a preheating and drying grid is arranged at the front part of the roller grate to ensure that the garbage is fully preheated and dried, so that the garbage is completely combusted on the roller grate. But add dry bars and make rubbish feeding control more complicated, have little volume rubbish to pass from the clearance of dry bars, lead to little volume rubbish can't obtain sufficient drying time, dry bars sets up the rubbish entrance at the combustion chamber in addition, has certain hindrance effect to the entering combustion chamber of rubbish.

Therefore, how to ensure that the low-heat value garbage can be completely burnt without arranging a preheating drying grid and accelerate the garbage burning speed when the garbage has a larger heat value is a technical problem to be solved by technical personnel in the field at present.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model aims to provide a rotary drum formula waste incinerator to under the prerequisite that does not set up the drying grid that preheats, can guarantee that low calorific value rubbish can burn completely, can accelerate waste incineration speed again when the rubbish calorific value is great.

In order to achieve the above object, the present invention provides the following technical solutions:

a rotary-drum garbage incinerator comprising:

a hearth having a feed inlet;

the drum-type fire grate is arranged in the hearth and is arranged in a direction from one end of the feeding hole to the other end of the feeding hole in a downward inclined mode, and the drum-type fire grate comprises a plurality of rollers capable of rotating forwards and reversely along the axial direction.

Optionally, in the rotary drum type garbage incinerator, an inclination angle α between a center line of the drum type grate and a horizontal direction is 24 ° to 30 °.

Optionally, in the above rotary drum type garbage incinerator, each of the drums of the drum type fire grate is a drum which independently controls forward and reverse rotation.

Optionally, in the rotary drum type garbage incinerator, the drum type grate at least comprises a first drum area and a second drum area, and the first drum area is an area where one end of the drum type grate close to the feed port is located;

each roller in the first roller area is a roller which independently controls positive and negative rotation or uniformly controls positive and negative rotation;

and each roller in the second roller area is a forward-pushing roller, and the rotating conveying direction of the forward-pushing roller is the same as the conveying direction of the roller fire grate.

Optionally, the rotary drum type waste incinerator further comprises a mode selection device, and when a first mode of the mode selection device is triggered, the drum runs in a reverse pushing mode;

the reverse pushing mode is that the roller rotates in a reciprocating mode along a first direction and a second direction, the rotating angle and the rotating speed along the first direction are larger than those along the second direction, the rotating conveying direction of the first direction is opposite to the conveying direction of the roller-type grate, and the rotating conveying direction of the second direction is the same as the conveying direction of the roller-type grate.

Optionally, in the rotary drum type garbage incinerator, when the drum operates in a reverse thrust manner, a difference between a rotation angle of the drum in the first direction and a rotation angle of the drum in the second direction is 1 ° to 4 °; and/or the presence of a gas in the gas,

the difference between the rotational speed of the drum in the first direction and the rotational speed of the drum in the second direction is 0.1-0.6 rph.

Optionally, in the rotary drum type garbage incinerator, when the drum operates in a reverse thrust manner, the rotation angle of the drum in the first direction is 6 ° to 9 °, and the rotation speed is 1.4rph to 2.0rph;

the rotation angle of the roller along the second direction is 4-7 degrees, and the speed is 0.8-1.4 rph.

Optionally, in the rotary drum type garbage incinerator, when the second mode of the mode selection device is triggered, the drum in the first area operates in the backward pushing mode, and the drum in the second area operates in the forward pushing mode; the first area is an area where one end of the drum-type grate close to the feeding hole is located, and the second area is an area except the first area;

the forward pushing mode is that the roller rotates in a reciprocating mode along a first direction and a second direction, and the rotating angle and the rotating speed along the first direction are smaller than those along the second direction.

Optionally, in the rotary drum type garbage incinerator, when the drum operates in a forward pushing manner, a difference between a rotation angle of the drum in the second direction and a rotation angle of the drum in the first direction is 1 ° to 4 °; and/or the presence of a gas in the atmosphere,

the difference between the rotation speed of the drum in the second direction and the rotation speed of the drum in the first direction is 0.1-0.6 rph.

Optionally, in the rotary drum type garbage incinerator, when the drum operates in a forward pushing manner, the rotation angle of the drum in the second direction is 6 ° to 9 °, and the rotation speed is 1.4rph to 2.0rph;

the drum is rotated in the first direction at an angle of 4 ° to 7 ° at a speed of 0.8rph to 1.4rph.

Optionally, in the rotary drum type garbage incinerator, when the third mode of the mode selection device is triggered, the drum rotates in the second direction, or operates in a forward-push manner.

Optionally, in the rotary drum type waste incinerator, the first heating value is 5500KJ/kg-7500 KJ/kg;

the second heating value is between 7500KJ/kg and 8500 KJ/kg.

Optionally, in the above rotary drum type waste incinerator, the hearth has a front arch and a rear arch for radiating heat, and a combustion air nozzle for supplying secondary air is further provided in the hearth.

Optionally, in the above rotary drum type waste incinerator, a slag hopper is arranged below the drum type grate and at one end far away from the feed port, and a slag conveyor is arranged below the slag hopper.

Optionally, the rotary drum type waste incinerator further comprises a primary air system, and a primary air duct of the primary air system is communicated with a slag hopper below the drum type grate.

The utility model provides a rotary drum formula waste incinerator arranges the cylinder grate by the one end of feed inlet to the downward sloping in the direction of the other end for rubbish can receive enough decurrent gravity to make can be under the action of gravity, rubbish can be followed the cylinder grate and carried to the direction of the other end by the one end that is close to the feed inlet. The utility model discloses a cylinder of drum-type grate can follow the axial and just reverse to make the rotation direction that can control the cylinder according to the demand, thereby change the conveying speed of rubbish. When rubbish calorific value is lower, steerable cylinder reversal for the cylinder is at the in-process of reversal, and rubbish is abundant stirs, and bottom rubbish will go upward, and upper garbage will be down, and rubbish is constantly stirred by the upset, fully contacts with the air, promotes rubbish drying effect, guarantees that low calorific value rubbish can burn completely.

The utility model discloses a cylinder on the drum-type grate can be according to its position of arranging and the calorific value that needs burning rubbish is nimble adjusts pivoted direction, speed and angle to adapt to the burning of various operating modes, different calorific value rubbish, realize wide load msw incineration. The utility model discloses a set up the cylinder into the cylinder that can just reverse, can guarantee that low calorific value rubbish burns completely under the prerequisite that does not set up the drying grid of preheating, can be when the rubbish calorific value is great again for msw incineration speed.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural view of a scale-type garbage incinerating drum grate in the prior art;

fig. 2 is a schematic structural view of a rotary drum type garbage incinerator according to an embodiment of the present invention.

The meaning of the various reference symbols in the figures is as follows:

01 is a fire grate, 02 is a roller;

101 is a primary air duct, 102 is a slag hopper, 103 is a roller, 104 is a roller grate, 105 is a rear arch, 106 is a hearth, 107 is a combustion-supporting air nozzle, 108 is a front arch, 109 is a feed inlet, 110 is a material pushing device, and 111 is a slag conveyer.

Detailed Description

The core of the utility model is to provide a rotary drum garbage incinerator to under the prerequisite that does not set up the drying grid of preheating, can guarantee that low calorific value rubbish can burn completely, can be when the rubbish calorific value is great again, accelerate msw incineration speed.

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in fig. 2, an embodiment of the present invention discloses a rotary drum type garbage incinerator, which comprises a furnace chamber 106 and a drum type grate 104.

The hearth 106 is provided with a feeding hole 109, the garbage to be incinerated enters the hearth 106 through the feeding hole 109, the roller type grate 104 is arranged in the hearth 106, and the roller type grate 104 is arranged in a downward inclined mode from one end of the feeding hole 109 to the other end. Specifically, the inclination angle α between the center line of the drum-type grate 104 and the horizontal direction can be designed to be 24-30 °.

The garbage falls into the position of the pushing device 110 in the hearth 106 from the feeding hole 109 under the action of gravity, is pushed into the drum-type grate 104 by the pushing device 110, and is incinerated on the drum-type grate 104. The refuse incinerated on the roller grate 104 slowly moves down the roller grate 104 under the action of gravity.

The emphasis of the embodiment is that the roller-type grate 104 comprises a plurality of rollers 103 which can rotate forward and backward along the axial direction. All the rollers 103 of the roller grate 104 may be designed as the rollers 103 that can rotate forward and backward, or only some of them may be designed as the rollers 103 that can rotate forward and backward. When a part of the rollers 103 is designed as the rollers 103 rotatable in the normal and reverse directions, the rollers 103 rotatable in the normal and reverse directions are preferably disposed in the area near the feed opening 109.

For convenience of understanding, the rotation direction of pushing the garbage from one end of the feeding hole 109 to the other end is defined as the forward rotation of the roller 103, that is, the pushing direction of the forward rotation of the roller 103 to the garbage is the same as the conveying direction of the roller grate 104 to the garbage; accordingly, the rotation direction opposite to the forward rotation of the drum 103 is the reverse rotation of the drum 103, and the pushing direction of the garbage by the reverse rotation of the drum 103 is opposite to the conveying direction of the garbage by the drum grate 104.

The utility model provides a rotary drum formula waste incinerator arranges cylinder grate 104 by the one end of feed inlet 109 to the downward sloping in the direction of the other end for rubbish can receive enough decurrent gravity, so that can be under the action of gravity, rubbish can be followed cylinder grate 104 and carried to the direction of the other end by the one end that is close to feed inlet 109. The utility model discloses a cylinder 103 of drum-type grate 104 can be along the axial just reversal to make the rotation direction that can control cylinder 103 according to the demand, thereby change the conveying speed of rubbish. When the rubbish calorific value is lower, the reversal of steerable cylinder 103 for the cylinder is at whole reverse rotation's in-process, and rubbish is abundant stirs, and bottom rubbish will go upward, and upper garbage will go downward, and rubbish is constantly by the upset stirring, fully contacts with the air, promotes rubbish drying effect, guarantees that low calorific value rubbish can burn completely.

The utility model discloses a cylinder 103 on the drum-type grate 104 can be according to its position of arranging and need the nimble pivoted direction of adjustment, speed and angle of the calorific value of burning rubbish to adapt to the burning of various operating modes, different calorific value rubbish, realize wide load msw incineration. The utility model discloses a set up cylinder 103 into the cylinder 103 that can just reverse, can guarantee that low calorific value rubbish burns completely under the prerequisite that does not set up the drying grid of preheating, can be when the rubbish calorific value is great again for msw incineration speed.

In a specific embodiment of the present invention, a front arch 108 and a rear arch 105 for radiating heat are provided in the furnace 106, and a combustion air nozzle 107 for supplying secondary air is further provided in the furnace 106. The garbage falls into the position of the pushing device 110 in the hearth 106 from the feeding hole 109 under the action of gravity, the garbage is pushed into the drum-type grate 104 by the pushing device 110, and after the garbage enters the drum-type grate 104, on one hand, the front arch 108 and the rear arch 105 transmit heat to the drum-type grate through radiation, and on the other hand, the garbage is also baked by high-temperature flue gas in the hearth 106, so that the garbage is further dried. The combustion-supporting air nozzle 107 arranged above the drum-type grate 104 of the hearth 106 can provide secondary air to ensure that combustible materials in the flue gas are burnt out.

In a specific embodiment of the present invention, the lower portion of the roller grate 104 and the end far away from the feeding port 109 are provided with the slag hopper 102, and the lower portion of the slag hopper 102 is provided with the slag conveyor 111, so as to burn the ash formed after the garbage is conveyed to the slag conveyor 111 through the slag hopper 102, and is discharged outside through the slag conveyor 111.

Further, the utility model discloses still can include a wind system, a wind channel 101 of a wind system and the sediment fill 102 intercommunication of drum-type grate 104 below, wind is through a wind channel 101, gets into drum-type grate 104 through the passageway of sediment fill 102, makes rubbish further dry.

In this embodiment, each roller 103 of the roller-type grate 104 may be a roller 103 capable of rotating forward and backward, and each roller 103 is controlled to rotate independently or controlled to rotate in different areas. For example, the drum grate 104 can be divided into a plurality of control areas from the upstream to the downstream, and the rotation direction and the rotation speed of the drum 103 in each control area are the same, so as to reduce the control difficulty.

The garbage falls into the position of the pushing device 110 in the hearth 106 from the feeding hole 109 under the action of gravity, the garbage is pushed into the drum-type grate 104 by the pushing device 110, and after the garbage enters the drum-type grate 104, on one hand, the front arch 108 and the rear arch 105 transmit heat to the drum-type grate through radiation, and on the other hand, the garbage is also baked by high-temperature smoke in the hearth 106 to dry the garbage. For garbage with a relatively low heat value, the above baking method is not sufficient to completely dry the garbage, so that the garbage is not sufficiently combusted. It is desirable to accomplish the drying of the waste as quickly as possible upstream of the grate 104 so that the waste can be burned as quickly as possible. In order to burn and pyrolyze the dried garbage as soon as possible, the downstream part of the roller-type grate 104 can have a faster conveying speed than the upstream part, so that the incineration efficiency is improved.

In this regard, in this embodiment, the roller grate 104 includes at least a first roller region and a second roller region, and the first roller region is the region where the end of the roller grate 104 near the feed opening 109 is located.

Each roller 103 in the first roller area is a roller 103 which independently controls the forward rotation and the reverse rotation or uniformly controls the forward rotation and the reverse rotation, namely, at least each roller 103 in the first roller area is designed to be a roller 103 which can fully turn over the garbage. While the rollers 103 in other areas do not need to be designed as the rollers 103 rotating forward and backward, the same design manner as in the prior art can be adopted, that is, the rollers in other areas can be designed as the rollers 103 only realizing forward pushing. For example, in the present embodiment, each roller 103 in the second roller region is designed as a forward-pushing roller, and the forward-pushing roller rotates in the same conveying direction as the roller grate 104. In this embodiment, the downstream area of the roller grate 104 is designed as a forward-pushing roller, which can reduce the cost of the roller, and can also enable the garbage to be transported more quickly when moving to the downstream of the roller grate 104, thereby improving the incineration efficiency.

In an embodiment of the present invention, the rotary drum type garbage incinerator may further include a mode selection device, and the mode selection device may select the operation mode of the roller 103 according to the heat value of the garbage, i.e. the roller 103 may be operated according to different modes according to the garbage with different heat values.

The mode selection means may select the first mode when the calorific value of the refuse to be incinerated is lower than the first calorific value, i.e., the operator switches the mode selection means to the first mode, for example, the mode selection means may be a switch or a switch button, and the switching and selection between the modes is performed by the switch and the button, and the drum 103 operates in a reverse thrust manner when the first mode of the mode selection means is triggered. The reverse pushing mode is that the roller 103 rotates in a reciprocating manner along a first direction and a second direction, and a rotation angle and a rotation speed along the first direction are greater than those along the second direction, a rotation conveying direction of the first direction is opposite to a conveying direction of the roller grate 104, and a rotation conveying direction of the second direction is the same as the conveying direction of the roller grate 104.

For example, in the view of fig. 2, the drum 103 rotates in a first direction, which is clockwise rotation of the drum 103; the corresponding roller 103 rotates in a second direction, rotating the roller 103 counterclockwise. For ease of understanding, when the drum 103 is described hereinafter as rotating clockwise, i.e., when the drum 103 is explained as rotating in a first direction; when the drum 103 is described as rotating counterclockwise, the drum 103 is illustrated as rotating in the second direction.

That is, in this embodiment, the drum 103 runs according to a reverse pushing mode, and is equivalent to, after the drum 103 rotates clockwise by a certain angle, then rotates counterclockwise by a certain angle, and the clockwise rotation angle is greater than the counterclockwise rotation angle, so that when the drum 103 rotates in a reciprocating manner, the comprehensive pushing effect on the garbage is opposite to the conveying effect of the gravity on the garbage, and the garbage is turned over. Moreover, as the roller 103 rotates in a reciprocating manner, when the roller 103 rotates anticlockwise, the pushing effect of the roller 103 on the garbage is the same as the conveying effect of gravity on the garbage, and the garbage is prevented from staying in the incinerator all the time to influence the incineration efficiency.

Simultaneously, cylinder 103 clockwise rotation's speed is greater than anticlockwise rotation's speed to when making cylinder 103 reciprocating rotation, so that cylinder 103 can overturn rubbish fast, also can promote rubbish slowly to downstream movement when cylinder 103 anticlockwise rotation simultaneously, avoid removing too fast and lead to the burning insufficient.

Further, when the drum 103 operates in a reverse-thrust manner, the difference between the rotation angle of the drum 103 in the first direction and the rotation angle of the drum 103 in the second direction is 1 to 4 degrees; the difference between the rotational speed of the drum 103 in the first direction and the rotational speed in the second direction is 0.1-0.6 rph. It should be noted that the angle difference and the rotation speed difference of the reciprocating rotation of the drum 103 are not too large, and only a small difference is required to be ensured, so as to avoid that the garbage stays in the hearth 106 for too long.

Specifically, when the roller 103 operates in a reverse thrust manner, the rotation angle of the roller 103 along the first direction is 6-9 degrees, and the rotation speed is 1.4-2.0 rph; the drum 103 is rotated in the second direction at an angle of 4 to 7 and at a speed of 0.8 to 1.4rph. It should be noted that the above-mentioned rotation angle range and rotation speed range are only examples for facilitating understanding of the present disclosure, and those skilled in the art may design corresponding parameters according to the requirements.

In a specific embodiment of the present invention, when the calorific value of the waste to be incinerated is higher than the first calorific value and lower than the second calorific value, the mode selection device can select the second mode, and when the second mode of the mode selection device is triggered, the drum 103 in the first region operates according to a reverse pushing mode, which can be the same as the reverse pushing mode disclosed in the above embodiments, and the description thereof is omitted here.

The rollers 103 of the second zone operate in a forward-push manner; the first region is a region where an end of the roller grate 104 near the feed opening 109 is located, and the second region is a region other than the first region. The forward-pushing mode is that the roller 103 rotates back and forth along the first direction and the second direction, and the rotation angle and the rotation speed along the first direction are smaller than those along the second direction.

Different from the above embodiment, when the calorific value of the garbage to be incinerated is between the first calorific value and the second calorific value, since the calorific value is higher than that of the above embodiment, in order to improve the incineration efficiency, it is not necessary that all the rollers 103 operate in a backward thrust manner, and the region far from the feed port 109 may operate in a forward thrust manner.

In this embodiment, the drum 103 in the second area operates in a forward-pushing manner, which is equivalent to that the drum 103 rotates counterclockwise by a certain angle, then rotates clockwise by a certain angle, and the counterclockwise rotation angle is greater than the clockwise rotation angle, so that when the drum 103 rotates reciprocally, the comprehensive pushing effect on the garbage is the same as the conveying effect of gravity on the garbage, and the force pushing the garbage downstream is greater than the force being turned over. Especially, when the roller 103 rotates clockwise, the pushing effect of the roller 103 on the garbage is the same as the conveying effect of gravity on the garbage, the garbage is accelerated to move downstream, and the incineration efficiency is improved.

Further, when the roller 103 operates in a forward-pushing manner, the difference between the rotation angle of the roller 103 in the second direction and the rotation angle of the roller 103 in the first direction is 1-4 degrees; the difference between the rotational speed of the drum 103 in the second direction and the rotational speed in the first direction is 0.1-0.6 rph. It should be noted that the angle difference and the rotation speed difference of the reciprocating rotation of the drum 103 are not too large, and only a small difference is required to be ensured, so as to avoid the garbage moving speed in the hearth 106 being too fast.

Specifically, when the roller 103 operates in a forward-pushing manner, the rotation angle of the roller 103 in the second direction is 6-9 degrees, and the rotation speed is 1.4-2.0 rph; the drum 103 is rotated in a first direction at an angle of 4 to 7 and at a speed of 0.8 to 1.4rph. It should be noted that the above-mentioned rotation angle range and rotation speed range are only examples for facilitating understanding of the present disclosure, and those skilled in the art may design corresponding parameters according to the requirements.

In an embodiment of the present invention, the mode selection means may select the third mode when the heat value of the garbage to be incinerated is higher than the second heat value, and the drum 103 rotates in the second direction or operates in a forward-pushing manner when the third mode of the mode selection means is triggered. In order to improve the incineration efficiency, differently from the above two embodiments, when the heating value of the garbage to be incinerated is higher than the second heating value, since the heating value is higher than that of the above two embodiments, all the rollers 103 may be controlled to rotate in the second direction or to operate in a forward-thrust manner.

Specifically, the first calorific value is 5500KJ/kg-7500 KJ/kg; the second calorific value is between 7500KJ/kg and 8500 KJ/kg. It should be noted that, the value ranges of the first heat value and the second heat value are only used for facilitating understanding of the present disclosure, and a person skilled in the art may design the corresponding first heat value and the second heat value according to the requirement.

Specific embodiments of the present application are described in detail below.

Example 1

When the heat value of the garbage is 6000KJ/kg, the inclination angle alpha of the central line of the roller-type fire grate 104 and the horizontal direction is 25 degrees, the rollers 103 adopt reverse thrust, each roller 103 of the roller-type fire grate 104 can rotate in a reciprocating mode, the clockwise rotation angle of the roller 103 is set to be 7 degrees, the rotation speed is 1.6rph, the anticlockwise rotation angle is set to be 5 degrees, and the speed is 1.0rph.

Firstly, garbage falls into a material pushing device 110 from a material inlet 109 under the action of gravity, the garbage is pushed into a drum-type grate 104 by the material pushing device 110, and after the garbage enters the drum-type grate 104, on one hand, heat is transferred to the garbage by a front arch 108 and a rear arch 105 through radiation; on the other hand, the flue gas is also roasted by high-temperature flue gas in the combustion chamber; in addition, primary air enters the grate through the primary air channel 101 and the slag hopper 102 channel, so that the garbage is further dried; in addition, the garbage is fully turned over in the process of the overall reverse rotation of the roller 103 on the roller grate 104, and finally the garbage is rapidly heated and dried. Then the garbage enters the subsequent drum-type fire grate 104, the drum 103 is pushed reversely, so that the garbage at the bottom layer moves upwards, the garbage at the upper layer moves downwards, the garbage is continuously overturned and stirred and is fully contacted with air, and finally the garbage is subjected to processes of pyrolysis, full combustion and the like on the drum-type fire grate 104.

And combustion-supporting air nozzles 107 arranged on two sides of the hearth provide secondary air to ensure that combustible substances in the flue gas are burnt out. Slag hoppers 102 are arranged below the roller-type grates 104 and at the tail ends of the roller-type grates 104, and slag leaks into the slag conveyor 111 through the slag hoppers 102 and is discharged outside through the slag conveyor 111.

Example 2

When the heat value of the garbage is 7000KJ/kg, the inclination angle alpha between the central line of the drum-type grate 104 and the horizontal direction is 28 degrees, the drum 103 adopts reverse thrust, the reverse thrust drum-type grate 104 can rotate in a reciprocating manner, the clockwise rotation angle of the drum 103 is set to be 8 degrees, the rotation speed is 1.8rph, the counterclockwise rotation angle is set to be 6 degrees, and the speed is 1.2rph.

Firstly, garbage falls into a material pushing device 110 from a material inlet 109 under the action of gravity, the garbage is pushed into a drum-type grate 104 by the material pushing device 110, and after the garbage enters the drum-type grate 104, on one hand, heat is transferred to the garbage by a front arch 108 and a rear arch 105 through radiation; on the other hand, the flue gas is also baked by high-temperature flue gas in the combustion chamber; in addition, primary air passes through the primary air duct 101 and enters the fire grate through the passage of the slag hopper 102, so that the garbage is further dried; in addition, the garbage is fully turned over in the process of overall reverse rotation of the roller 103 on the roller grate 104, and finally the garbage is rapidly heated and dried. And then the garbage enters a subsequent drum-type grate 104, the drums 103 are pushed reversely, so that the garbage at the bottom layer moves upwards, the garbage at the upper layer moves downwards, the garbage is continuously overturned and stirred and is fully contacted with air, and finally the garbage is subjected to processes of pyrolysis, full combustion and the like on the reverse-push drum-type grate 104.

And combustion-supporting air nozzles 107 arranged on two sides of the hearth provide secondary air to ensure that combustible substances in the flue gas are burnt out. Slag hoppers 102 are arranged below and at the tail ends of the drum-type fire grates 104, and slag leaks into the slag conveyor 111 through the slag hoppers 102 and is discharged outside through the slag conveyor 111.

Example 3

When the heat value of the garbage is 8000KJ/kg, the inclination angle alpha between the central line of the roller type fire grate 104 and the horizontal direction is 28 degrees, the upstream roller 103 adopts reverse thrust, the downstream roller 103 adopts forward thrust, the roller type fire grate 104 can rotate in a reciprocating mode, the clockwise rotation angle of the forward thrust roller 103 is set to be 5 degrees, the rotation speed is 1.2rph, the anticlockwise rotation angle is 7 degrees, the speed is 1.8rph, the integral movement direction of the roller 103 is the same as the movement direction of the garbage, and the garbage incineration is accelerated. The clockwise rotation angle of the reversely pushed roller 103 is set to be 7 degrees, the rotation speed is set to be 1.8rph, the anticlockwise rotation angle is set to be 5 degrees, the speed is set to be 1.2rph, and the garbage is enabled to be stirred and dried sufficiently at the front end.

Firstly, garbage falls into a material pushing device 110 from a material inlet 109 under the action of gravity, the garbage is pushed into a drum-type grate 104 by the material pushing device 110, and after the garbage enters the drum-type grate 104, on one hand, heat is transferred to the garbage by a front arch 108 and a rear arch 105 through radiation; on the other hand, the flue gas is also roasted by high-temperature flue gas in the combustion chamber; in addition, primary air passes through the primary air duct 101 and enters the fire grate through the passage of the slag hopper 102, so that the garbage is further dried; in addition, the upstream roller 103 on the roller grate 104 is fully turned over in the process of overall reverse rotation, and finally the garbage is rapidly heated and dried. The garbage then enters the following forward-pushing rollers in the roller grate 104 for fast pyrolysis and complete combustion.

And combustion-supporting air nozzles 107 arranged at two sides of the hearth provide secondary air to ensure that combustible substances in the flue gas are burnt out. Slag hoppers 102 are arranged below and at the tail ends of the drum-type fire grates 104, and slag leaks into the slag conveyor 111 through the slag hoppers 102 and is discharged outside through the slag conveyor 111.

It should be noted that, in the present specification, the embodiments are all described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements. An element defined by the phrase "comprising a … …" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.

In the following, the terms "first", "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature.

The principles and embodiments of the present invention have been explained herein using specific examples, and the above descriptions of the embodiments are only used to help understand the core concepts of the present invention. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (14)

1. A rotary drum type garbage incinerator, comprising:

a furnace (106) having a feed inlet (109);

the drum-type grate (104) is arranged in the hearth (106), the drum-type grate (104) is arranged in a downward inclined mode from one end of the feeding hole (109) to the other end of the feeding hole, and the drum-type grate (104) comprises a plurality of rollers (103) capable of rotating forwards and reversely in the axial direction.

2. A rotary-drum garbage incinerator according to claim 1, wherein the inclination angle α of the center line of said drum grate (104) with the horizontal direction is 24 ° to 30 °.

3. A rotary-drum garbage incinerator according to claim 1, wherein each of said drums (103) of said drum-type grate (104) is a drum (103) which is controlled to rotate forward and backward independently.

4. A rotary-drum garbage incinerator according to claim 1, wherein said drum grate (104) comprises at least a first drum zone and a second drum zone, said first drum zone being the zone where the end of said drum grate (104) near said inlet opening (109) is located;

each roller (103) in the first roller area is a roller (103) which independently controls positive and negative rotation or uniformly controls positive and negative rotation;

each roller (103) in the second roller area is a forward-pushing roller, and the rotating conveying direction of the forward-pushing roller is the same as the conveying direction of the roller fire grate (104).

5. A rotary-drum garbage incinerator according to claim 1, characterized by further comprising mode selection means, said drum (103) operating in a reverse thrust manner when a first mode of said mode selection means is triggered;

the reverse pushing mode is that the roller (103) rotates in a reciprocating mode along a first direction and a second direction, the rotating angle and the rotating speed along the first direction are larger than those along the second direction, the rotating conveying direction of the first direction is opposite to the conveying direction of the roller grate (104), and the rotating conveying direction of the second direction is the same as the conveying direction of the roller grate (104).

6. A rotary-drum garbage incinerator according to claim 5, characterized in that when said drum (103) is operated in a reverse thrust manner, the difference between the angle of rotation of said drum (103) in said first direction and the angle of rotation in said second direction is 1 ° -4 °; and/or the presence of a gas in the gas,

the difference between the rotational speed of the drum (103) in the first direction and the rotational speed in the second direction is 0.1-0.6 rph.

7. A rotary drum garbage incinerator according to claim 6, wherein when said drum (103) is operated in a reverse manner, said drum (103) is rotated at an angle of 6 ° to 9 ° in said first direction and at a speed of 1.4-2.0 rph;

the drum (103) is rotated in the second direction at an angle of 4 ° to 7 ° at a speed of 0.8rph to 1.4rph.

8. A rotary-drum garbage incinerator according to any of claims 5-7, characterized in that when the second mode of said mode selecting means is activated, said drum (103) of the first zone operates in said reverse-pushing mode and said drum (103) of the second zone operates in forward-pushing mode; the first area is an area where one end, close to the feed port (109), of the drum-type grate (104) is located, and the second area is an area except the first area;

the forward pushing mode is that the roller (103) rotates in a reciprocating mode along a first direction and a second direction, and the rotating angle and the rotating speed along the first direction are smaller than those along the second direction.

9. A rotary-drum garbage incinerator according to claim 8, characterized in that said drum (103) is operated in a forward manner with a difference between the angle of rotation of said drum (103) in said second direction and the angle of rotation in said first direction of 1 ° -4 °; and/or the presence of a gas in the gas,

the difference between the rotational speed of the drum (103) in the second direction and the rotational speed in the first direction is 0.1-0.6 rph.

10. A rotary-drum garbage incinerator according to claim 9, wherein said drum (103) is operated in a forward manner, with said drum (103) being rotated in said second direction at an angle of 6 ° -9 ° and at a speed of 1.4-2.0 rph;

the drum (103) is rotated in the first direction at an angle of 4 ° to 7 ° and at a speed of 0.8-1.4 rph.

11. A rotary-drum garbage incinerator according to claim 8, characterized in that when the third mode of said mode selecting means is activated, said drum (103) rotates in said second direction or runs in a forward-push manner.

12. Rotary-drum waste incinerator according to any of claims 1 to 7, characterized in that said furnace chamber (106) has a front arch (108) and a rear arch (105) for radiating heat, and said furnace chamber (106) has combustion air nozzles (107) for supplying secondary air.

13. A rotary-drum garbage incinerator according to any one of claims 1 to 7, wherein a slag hopper (102) is provided below said drum grate (104) and at an end remote from said feed port (109), and a slag conveyor (111) is provided below said slag hopper (102).

14. A rotary-drum garbage incinerator according to claim 13, further comprising a primary air system, the primary air duct (101) of said primary air system communicating with a slag hopper (102) below said drum grate (104).

Images