A staggered combustion household garbage incinerator

Abstract

This invention discloses a staggered combustion municipal solid waste incinerator, comprising an incinerator body. Within the incinerator body, a stockpiling zone and a drying section are sequentially arranged along the waste transport direction. A feed inlet is located above the stockpiling zone. Several pushers are positioned on the side of the stockpiling zone away from the drying section grate. Each pusher is slidably arranged in the stockpiling zone along the waste transport direction and is horizontally arranged sequentially along a direction perpendicular to the waste transport direction. Each pusher operates sequentially at the same time interval along its arrangement direction. The drying section is equipped with a reciprocating grate for receiving the material discharged from the pushers. The reciprocating grate's cycle is less than the time interval between the actions of two adjacent pushers. The waste material is sequentially ignited within the incinerator body, thus staggering the peak emissions of pollutants in space and time, resulting in uniform pollutant release and significantly improved flue gas purification system efficiency.

Description

Technical Field

[0001] This invention relates to the field of waste incinerator technology, and in particular to a staggered-peak combustion municipal solid waste incinerator. Background Technology

[0002] In existing waste incinerators, the feeders operate synchronously, with the peak NOx and SO2 release rates matching the feeder's cycle. Specifically, after the feeder pushes the waste into the incinerator, each pile of waste (forming a pile after each feed) burns and releases pollutants sequentially over time. The peak pollutant levels are high and periodic, coinciding with the feeder's cycle, making it difficult for flue gas purification agents to maintain peak efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a staggered combustion municipal solid waste incinerator to solve the problems existing in the prior art. The waste material is ignited sequentially in the incinerator body so that the peak release of waste pollutants is staggered in space and time, the release of pollutants is uniform, and the efficiency of the flue gas purification system is greatly improved.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a staggered combustion municipal solid waste incinerator, including an incinerator body. A stockpiling area and a drying section are sequentially arranged within the incinerator body along the waste transport direction. A feed inlet is provided above the stockpiling area. Several pushers are provided on the side of the stockpiling area away from the grate of the drying section. Each pusher is reciprocatingly slidably disposed in the stockpiling area along the waste transport direction and is arranged horizontally in sequence along a direction perpendicular to the waste transport direction. Each pusher operates sequentially at the same interval along its arrangement direction. The drying section is provided with a reciprocating grate for receiving the material discharged from the pushers. The reciprocating movement period of the drying section reciprocating grate is less than the time interval between the actions of two adjacent pushers.

[0005] Preferably, the pusher includes a telescopic rod installed on the incinerator body, the telescopic rod extending along the waste conveying direction, and one end of the telescopic rod extending into the pushing zone is connected to a pusher plate for pushing the waste to the drying section, and the pusher plates are arranged in the same direction as the pusher.

[0006] Preferably, the outer side of the incinerator body is provided with a drive mechanism for driving the telescopic rod to extend and retract. One end of the telescopic rod is connected to the drive mechanism, and the other end slides and seals into the side wall of the incinerator body, and extends to the pushing area to connect with the push plate.

[0007] Preferably, the stacking area is provided with a stacking platform for receiving waste, the discharge end of the stacking platform is connected to the drying section, and the bottom end of the pusher plate is slidably engaged with the stacking platform.

[0008] Preferably, two adjacent push plates are arranged close together, and the span of all push plates along the direction perpendicular to the waste conveying direction matches the width of the stacking platform along the direction perpendicular to the waste conveying direction.

[0009] Preferably, a feed inlet is provided above the stacking platform, and the initial position of the pusher plate and the reciprocating grate of the drying section are respectively located on both sides of the feed inlet along the waste conveying direction.

[0010] Preferably, the time interval between the actions of two adjacent telescopic rods and the push plate is less than 10 minutes.

[0011] Preferably, the width of a single pusher plate along the direction perpendicular to the waste conveying direction is not less than 1m.

[0012] Preferably, the pusher plate is provided with a top plate that moves synchronously with it. The top plate is located on the side of the pusher plate away from the drying section and extends horizontally out of the incinerator body. The top plate is in sliding and sealing fit with the side wall of the incinerator body.

[0013] Preferably, the drying section has a combustion section, a burnout section and a slag discharge port arranged sequentially at the end of the conveying direction along the waste conveying direction. The combustion section and the burnout section are respectively provided with a combustion section reciprocating grate and a burnout section reciprocating grate that sequentially receive waste combustion. The reciprocating movement period of the combustion section reciprocating grate and the burnout section reciprocating grate is the same as the reciprocating movement period of the drying section reciprocating grate.

[0014] The present invention achieves the following technical effects compared to the prior art:

[0015] Each pusher operates sequentially along its arrangement direction at equal intervals, allowing waste from the stockpile area to enter the drying section in batches. The drying section is equipped with a reciprocating grate to receive the waste from the pushers. The reciprocating grate's cycle is shorter than the time interval between the actions of two adjacent pushers. Waste entering the drying section sequentially is conveyed by the reciprocating grate. The combustion process of waste pushed into the drying section by each pusher and in the subsequent combustion section is inconsistent, achieving staggered incineration. This ensures that the peak release of pollutants from the waste is staggered in both space and time, guaranteeing uniform pollutant release and significantly improving the efficiency of the flue gas purification system. Furthermore, staggered combustion means the combustion flame is not concentrated but dispersed, avoiding localized high temperatures and effectively controlling coking caused by high-calorific-value waste after waste sorting. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a top view of the overall structure of the present invention;

[0018] Figure 2 This is a front view of the overall structure of the present invention;

[0019] Among them, 1-stocking area, 2-drying section, 3-combustion section, 4-burnout section, 5-slag discharge port, 6-telescopic rod, 7-push plate, 8-pusher, 9-feed port. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] The purpose of this invention is to provide a staggered combustion municipal solid waste incinerator to solve the problems existing in the prior art. The waste material is ignited sequentially in the incinerator body so that the peak release of waste pollutants is staggered in space and time, the release of pollutants is uniform, and the efficiency of the flue gas purification system is greatly improved.

[0022] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] like Figures 1 to 2As shown, this embodiment provides a staggered combustion municipal solid waste incinerator, including an incinerator body. Within the incinerator body, a stockpiling zone 1 and a drying section 2 are sequentially arranged along the waste transport direction. A feed inlet 9 is located above the stockpiling zone 1. Several pushers 8 are located on the side of the stockpiling zone 1 away from the grate of the drying section 2. Each pusher 8 is reciprocatingly slidably disposed in the stockpiling zone 1 along the waste transport direction and is arranged horizontally in sequence along a direction perpendicular to the waste transport direction. Each pusher 8 operates sequentially at the same interval along its arrangement direction. Preferably, at least two pushers 8 are provided to ensure that the waste in the stockpiling zone 1 is pushed in batches, allowing the waste in the stockpiling zone 1 to enter the drying section 2 in batches. The drying section 2 is equipped with a receiving device for the discharge of the pushers 8. The drying section uses a reciprocating grate, where the reciprocating movement cycle is less than the time interval between the actions of two adjacent pushers 8. Specifically, each pusher 8 pushes material sequentially at the same interval. The time after the previous pusher 8 completes its push is set as t, and the time when the next pusher 8 begins its push is set as t1. The reciprocating movement cycle of the drying section grate is <t1-t. Under this method, waste entering the drying section 2 sequentially is transported by the reciprocating grate. The combustion process of waste pushed into the drying section 2 by each pusher 8 and the subsequent combustion section 3 is inconsistent, achieving staggered incineration. This ensures that the peak release of pollutants from the waste is staggered in both space and time, guaranteeing uniform release of pollutants and significantly improving the efficiency of the flue gas purification system. Furthermore, staggered combustion means the combustion flame is not concentrated but dispersed, avoiding localized high temperatures and effectively controlling coking caused by high-calorific-value waste after waste sorting. Furthermore, by alternately pushing the waste through each pusher 8, the waste that first enters the incinerator body is burned, and then the waste that enters the incinerator body afterward is ignited, forming a sequential ignition process, which ensures stable combustion of the waste within the incinerator body.

[0024] The pusher 8 includes a telescopic rod 6 installed on the incinerator body. The telescopic rod 6 extends along the waste conveying direction, and one end of it that extends into the pushing area is connected to a push plate 7 for pushing the waste to the drying section 2. Each push plate 7 is arranged in the direction of the pusher 8 so that the push plate 7 can be driven by the telescopic rod 6 to complete the waste pushing work in the stacking area 1. Moreover, the plane where the push plate 7 is located is perpendicular to the waste conveying direction, so that the sufficiency of each push can be guaranteed.

[0025] Furthermore, the outer side of the incinerator body is provided with a drive mechanism for extending and retracting the telescopic rod 6. Preferably, the drive mechanism can be a hydraulic cylinder, and the telescopic rod 6 is the piston rod of the hydraulic cylinder. One end of the telescopic rod 6 is connected to the drive mechanism, and the other end slides and seals into the side wall of the incinerator body and extends to the pushing area to connect with the push plate 7, so that the telescopic rod 6 can be driven by the drive mechanism to complete the reciprocating drive of the push plate 7, and can ensure the pushing force on the waste pile.

[0026] In a preferred embodiment of the present invention, the stacking area 1 is provided with a stacking platform for receiving waste. The stacking platform is used to accumulate and pre-store the waste falling from the feed inlet 9. The discharge end of the stacking platform is connected to the drying section 2 so that after the pusher plate 7 pushes the waste stack, it directly enters the drying section 2 and falls onto the reciprocating grate of the drying section 2. The bottom end of the pusher plate 7 is slidably engaged with the stacking platform. Preferably, the bottom end of the pusher plate 7 and the stacking platform are both smooth structures, and the bottom end of the pusher plate 7 is attached to the stacking platform so that the pusher plate 7 can slide along the stacking platform, thereby allowing the waste stack on the stacking platform to be fully pushed away and enter the drying section 2.

[0027] Furthermore, adjacent push plates 7 are set close together, and the span of all push plates 7 along the direction perpendicular to the waste conveying direction matches the width of the stacking platform along the direction perpendicular to the waste conveying direction. Since the stacking platform is used to stack waste, the waste can be spread on the stacking platform after falling from the inlet 9, so as to ensure that each push plate 7 can push the waste on the stacking platform away fully after acting in sequence, and avoid leaving residue on the stacking platform.

[0028] The material stacking platform is equipped with a feed inlet 9 above it. The initial position of the pusher plate 7 and the reciprocating grate of the drying section are located on both sides of the feed inlet 9 along the waste conveying direction. After the waste material falls into the stacking platform through the feed inlet 9, it can be directly piled up between the initial position of the pusher plate 7 and the reciprocating grate of the drying section, avoiding it from falling directly into the drying section 2 or piling up at the initial position of the pusher plate 7, which would affect its movement.

[0029] Furthermore, the time interval between the actions of two adjacent telescopic rods 6 and push plates 7 is less than 10 minutes. Since the time after the previous pusher 8 finishes pushing the material is set to t, and the time when the next pusher 8 starts pushing the material is set to t1, that is, t1-t < 10 minutes. Since the time for the release of pollutants from waste combustion is about 10 minutes, if t1-t > 10 minutes, the effect of split pushing on homogenizing the emission of pollutants will be not obvious.

[0030] Furthermore, the width of a single pusher plate 7 perpendicular to the waste conveying direction is not less than 1m. The reason why the width of a single pusher plate 7 is not less than 1m is that the waste composition is complex and often contains strip-shaped objects. If the size of a single pusher plate 7 is too small, it is easy to cause bridging and fail to push out the material.

[0031] In a preferred embodiment of the present invention, the top of the pusher plate 7 is provided with a top plate that moves synchronously with it. The top plate is located on the side of the pusher plate 7 away from the drying section 2 and extends horizontally out of the incinerator body. The top plate is slidably sealed with the side wall of the incinerator body. Through the sliding cooperation between the top plate and the incinerator body, the top plate is always located above the pusher plate 7 during the reciprocating movement of the pusher plate 7, which prevents the waste pile from falling between the pusher plate 7 and the side wall of the incinerator body and affecting the reciprocating sliding range of the pusher plate 7.

[0032] Furthermore, the end of the drying section 2 is sequentially provided with a combustion section 3, a burnout section 4, and a slag discharge port 5 along the waste conveying direction. Preferably, the combustion section 3 is divided into multiple sections. The combustion section 3 and the burnout section 4 are respectively provided with a combustion section reciprocating grate and a burnout section reciprocating grate that sequentially receive waste combustion. The drying section reciprocating grate, the multi-section combustion section reciprocating grate, and the burnout section reciprocating grate settle down step by step along the waste conveying direction. The primary air fan is connected to the drying section reciprocating grate, the multi-section combustion section reciprocating grate, and the burnout section reciprocating grate through a primary air flow meter. The reciprocating movement cycle of the combustion section reciprocating grate and the burnout section reciprocating grate is the same as the reciprocating movement cycle of the drying section reciprocating grate, so as to ensure that the waste material is conveyed according to the predetermined conveying time cycle and fully realize staggered incineration.

[0033] In a preferred embodiment of the present invention, under the conditions of unchanged waste load and unchanged evaporation rate, the original feeding cycle was 5 times / hour. After adopting two pushers in 8-row configuration, the feeding cycle is increased to 10 times / hour. The average NOx emission (after SNCR purification, with the same purification agent) is reduced from 140 mg / Nm³. 3 Reduced to 80 mg / Nm 3 .

[0034] Any adaptive changes made according to actual needs are within the scope of protection of this invention.

[0035] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0036] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A staggered-peak combustion municipal solid waste incinerator, characterized in that, The incinerator includes a main body, within which a stockpiling area and a drying section are sequentially arranged along the waste transport direction. A feed inlet is located above the stockpiling area. Several pushers are located on the side of the stockpiling area away from the drying section grate. Each pusher is slidably arranged in the stockpiling area along the waste transport direction and is horizontally arranged sequentially along a direction perpendicular to the waste transport direction. Each pusher operates sequentially at the same time interval along its arrangement direction, allowing waste from the stockpiling area to enter the drying section in batches. The drying section is equipped with a reciprocating grate for receiving the material discharged from the pushers. The reciprocating grate's cycle is less than the time interval between the actions of two adjacent pushers. The waste combustion process in the drying section and subsequent combustion sections is inconsistent, achieving staggered incineration. The pusher includes a telescopic rod installed on the incinerator body. The telescopic rod extends along the waste conveying direction, and one end of the rod that extends into the stacking area is connected to a pusher plate for pushing the waste to the drying section. The pusher plates are arranged in the same direction along the pusher. The pusher plate is provided with a top plate that moves synchronously with it. The top plate is located on the side of the pusher plate away from the drying section and extends horizontally out of the incinerator body. The top plate is slidably sealed to the side wall of the incinerator body. Through the sliding fit between the top plate and the incinerator body, the top plate is always located above the pusher plate during the reciprocating movement of the pusher plate, which prevents the waste from falling between the pusher plate and the side wall of the incinerator body and affecting the reciprocating sliding range of the pusher plate.

2. The staggered combustion municipal solid waste incinerator according to claim 1, characterized in that, The outer side of the incinerator body is provided with a drive mechanism for driving the telescopic rod to extend and retract. One end of the telescopic rod is connected to the drive mechanism, and the other end slides and seals into the side wall of the incinerator body, and extends to the stacking area to connect with the push plate.

3. The staggered-peak combustion municipal solid waste incinerator according to claim 2, characterized in that, The material storage area is equipped with a material storage platform for receiving waste. The discharge end of the material storage platform is connected to the drying section, and the bottom end of the push plate is slidably engaged with the material storage platform.

4. The staggered combustion municipal solid waste incinerator according to claim 3, characterized in that, The two adjacent push plates are arranged close together, and the span of all the push plates along the direction perpendicular to the waste conveying direction matches the width of the stacking platform along the direction perpendicular to the waste conveying direction.

5. The staggered-peak combustion municipal solid waste incinerator according to claim 4, characterized in that, The material stacking platform is provided with a feed inlet above it, and the initial position of the pusher plate and the reciprocating grate of the drying section are respectively located on both sides of the feed inlet along the waste conveying direction.

6. The staggered-peak combustion municipal solid waste incinerator according to claim 5, characterized in that, The time interval between the actions of two adjacent telescopic rods and push plates is less than 10 minutes.

7. The staggered-peak combustion municipal solid waste incinerator according to claim 6, characterized in that, The width of a single pusher plate perpendicular to the waste conveying direction is not less than 1m.

8. The staggered-peak combustion municipal solid waste incinerator according to claim 7, characterized in that, The drying section has a combustion section, a burnout section and a slag discharge port arranged sequentially at the end of the waste conveying direction. The combustion section and the burnout section are respectively provided with a combustion section reciprocating grate and a burnout section reciprocating grate that receive waste in sequence. The reciprocating movement period of the combustion section reciprocating grate and the burnout section reciprocating grate is the same as the reciprocating movement period of the drying section reciprocating grate.

Images