阅读说明：本技术 一种垃圾焚烧炉烟气回流机械联锁电动三通风门自动控制系统 (Automatic control system for flue gas backflow mechanical interlocking electric three-way air door of garbage incinerator ) 是由 龙吉生 朱晓平 杨文妍 张会妍 王高尚 王涛 何术东 吴斯鹏 刘志伟 闫信 于 2019-10-07 设计创作，主要内容包括：本发明涉及一种垃圾焚烧炉烟气回流机械联锁电动三通风门自动控制系统,包括烟风管道、机械联锁电动三通风门、烟风管道手动风门、密封风机、密封风加热器。来自袋式除尘器出口的烟气通过机械联锁电动三通风门及烟气回流风机喷入焚烧炉内,袋式除尘器和回流风机之间的管道为主管道,另外在回流风机入口设置旁路管道和密封风管道,密封风主管道上设置密封风机和密封风机加热器,来自密封风机的密封风,再通过密封风支管道,分别与主管道和旁路管道上的机械联锁电动三通风门连接,在密封风支管道上设置手动风门。本发明有效的解决了烟气泄露问题。(The invention relates to an automatic control system of a mechanical interlocking electric three-way air door for flue gas backflow of a garbage incinerator, which comprises a flue gas and air pipeline, a mechanical interlocking electric three-way air door, a manual air door of the flue gas and air pipeline, a sealing fan and a sealing air heater. Flue gas from the bag type dust collector outlet is sprayed into the incinerator through the mechanical interlocking electric three-way air door and the flue gas backflow fan, a pipeline between the bag type dust collector and the backflow fan is a main pipeline, a bypass pipeline and a sealing air pipeline are arranged at the inlet of the backflow fan, a sealing fan and a sealing fan heater are arranged on the sealing air main pipeline, sealing air from the sealing fan is connected with the mechanical interlocking electric three-way air door on the main pipeline and the bypass pipeline respectively through a sealing air branch pipeline, and a manual air door is arranged on the sealing air branch pipeline. The invention effectively solves the problem of flue gas leakage.)

1. An automatic control system for a waste incinerator flue gas backflow mechanical interlocking electric three-way air door is characterized by comprising a main pipeline, a bypass pipeline, a sealing air main pipeline, a sealing air branch pipeline, a mechanical interlocking electric three-way air door, a sealing fan, a sealing air heater and a manual air door on the sealing air branch pipeline; mechanical interlocking electric three-way air doors are respectively arranged on the flue gas return main pipeline and the bypass pipeline; a sealed wind power heater is arranged at the outlet of the sealed fan; and a manual air door baffle is arranged on the outlet branch pipeline of the sealed fan.

2. The automatic control system of the mechanical interlocking electric three-way air door of the flue gas reflux of the garbage incinerator according to claim 1, characterized in that the mechanical interlocking electric three-way air door is formed by connecting two main air doors DN1100 with the same specification in parallel and mechanically interlocking a sealing air door DN250 with the sealing function.

Technical Field

The invention relates to the field of urban household garbage incineration, in particular to a three-section grate type automatic control system for flue gas backflow of a household garbage incinerator.

Background

In recent years, domestic waste incineration power generation technology is widely applied at home and abroad, meanwhile, the emission standard of waste incinerator smoke is becoming stricter, and in order to realize ultralow emission, the emission of NOx is reduced by adopting a smoke backflow process. The flue gas backward flow installs a ordinary air door baffle on the tuber pipe, has the condition of revealing the flue gas, consequently needs a technological control equipment that can effectively solve the flue gas and reveal, and this kind of demand can be realized to electronic three doors that have sealed function.

Disclosure of Invention

The invention aims to provide an automatic control system of a waste incinerator flue gas backflow mechanical interlocking electric three-way air door, which solves the problem of flue gas leakage caused by adopting a common air door baffle plate during flue gas backflow, and simultaneously further avoids the problem of flue gas index disturbance caused by reverse flow of flue gas due to enhancement of sealing performance

The invention provides an automatic control system for a smoke backflow mechanical interlocking electric three-way air door of a garbage incinerator, which comprises main pipelines 1 and 2, a bypass pipeline 3, a main sealing air pipeline 6, branch sealing air pipelines 4 and 5, mechanical interlocking electric three-way air doors 12 and 13, a sealing fan 11, a sealing air heater 14 arranged at the outlet of the sealing fan, and manual air door baffles 9 and 10 arranged on the branch sealing fan outlet pipeline.

Furthermore, the mechanical interlocking electric three-way air door is formed by mechanically interlocking two main air doors with the same specification and a sealing air door with a sealing function, and one actuator can control the mechanical interlocking electric three-way air door. The mechanical interlocking electric three-way air door consists of two main air doors DN1100 with the same specification and a sealing air door DN250 with the sealing function.

Furthermore, mechanical interlocking electric three-way air doors 12 and 13 are respectively arranged on the main flue gas return pipeline 2 and the bypass pipeline 3.

Through setting up the electronic tee bend air door of mechanical interlocking who has sealing function, avoided the flue gas that exists of only a simple use electronic air door baffle to reveal the problem, simultaneously because sealing performance's enhancement, further avoided the flue gas index disturbance problem that the flue gas flows backward reverse flow and leads to.

Further, be provided with the electronic tee bend air door of mechanical interlocking respectively on trunk line and bypass pipeline, two electronic tee bend air door reverse control of mechanical interlocking correspond two kinds of operating condition, operating mode one respectively: backflow air comes from an outlet of the bag type dust collector and is sprayed into the incinerator through a mechanical interlocking electric three-way air door (12), the main pipeline (2) (1) and a smoke backflow fan; working conditions are as follows: the return air comes from the burning room and is sprayed into the burning furnace through the mechanical interlocking electric three-way air door (13), the bypass pipeline (3), the main pipeline (1) and the smoke return fan.

Furthermore, a sealing fan is arranged aiming at the mechanical interlocking electric three-way air door, so that the smoke gas is prevented from being leaked due to the fact that the mechanical interlocking electric three-way air door is not closed tightly.

Furthermore, an electric heater is arranged at the outlet of the sealing fan, so that the temperature of the air sent to the mechanical interlocking electric three-way air door by the sealing fan is heated to about 120 degrees, and the corrosion caused by the temperature difference between the unheated normal-temperature sealing air and the 150-degree flue gas backflow air is avoided.

Furthermore, a manual air door adjusting baffle is arranged on the outlet branch pipeline of the sealed fan, and the air quantity from the sealed fan to the mechanical interlocking electric three-way air door can be manually adjusted.

The technical scheme provided by the invention is as follows: the utility model provides a waste incinerator flue gas backward flow mechanical interlocking electronic tee bend air door automatic control system, including cigarette wind pipeline, mechanical interlocking electronic tee bend air door, cigarette wind pipeline manual air door, sealed fan, sealed air heater. There are two operating conditions, operating condition one: the return air comes from the outlet of the bag type dust collector and is sprayed into the incinerator through a mechanical interlocking electric three-way air door on the main pipeline, the main pipeline and a flue gas return fan; working conditions are as follows: the return air comes from the burning room and is sprayed into the burning furnace through the mechanical interlocking electric three-way air door, the bypass pipeline, the main pipeline and the smoke return fan on the bypass pipeline.

Drawings

FIG. 1 is a schematic view of a mechanically interlocked electric three-way damper according to the present invention.

FIG. 2 is a schematic diagram of the system of the present invention.

FIG. 3 is a flow chart of an embodiment of a first operating mode.

FIG. 4 is a flow chart of the second embodiment.

Detailed Description

In order to make the technical scheme of the invention more clear, the invention is explained in detail below with reference to the accompanying drawings.

In fig. 1, two DN1100 air doors of the mechanical interlocking electric three-way air door in series are connected with one DN250 air door in the middle, the two DN1100 are controlled by an electric actuating mechanism to be opened or closed simultaneously, the DN250 air door and the DN1100 are controlled in a reverse mode, when the DN1100 air door is opened, the DN250 air door is closed, and when the DN1100 is closed, the DN250 air door is opened.

The flue gas backflow fan has two working conditions, namely: the mechanical interlocking electric three-way air door 12DN1100 is opened, the mechanical interlocking electric three-way air door 13DN1100 is closed, and the return air of the return fan comes from the outlet of the bag-type dust collector; working conditions are as follows: and a mechanical interlocking electric three-way air door 13DN1100 is opened, a mechanical interlocking electric three-way air door 12DN1100 is closed, and the return air of the return fan comes from the burning room.

When the backflow air comes from the outlet of the bag-type dust collector under the working condition I, 2DN1100 air doors of the mechanical interlocking electric three-way air door 12 are opened, DN250 air doors of the mechanical interlocking electric three-way air door 12 are closed, and the manual air door 9 on the pipeline 4 is opened; the working flow of 2DN1100 air doors of the mechanical interlocking electric three-way air door 13 is closed, DN250 air doors of the mechanical interlocking electric three-way air door 13 are opened, the manual air door 10 on the pipeline 5 is closed, and the working flow of the matching sealing air blower and the sealing air heater is shown in figure 3.

When the return air of the working condition two comes from the site, the action mode of the mechanical interlocking electric three-way air door and the working condition one mechanical interlocking electric three-way air door are reversely controlled, the electric heater does not need to be started, and the working flow is shown in figure 4.

The following are specific examples of the present invention: under the first working condition, when backflow air comes from an outlet of a bag-type dust collector, a mechanical interlocking electric three-way air door on a backflow main pipeline is opened, the temperature of the backflow flue gas is 150 degrees, and sealing air is heated to 120 degrees, so that the problem of flue gas leakage is avoided, and the problem of corrosion caused by temperature difference is solved; and under the second working condition, when the backflow air comes from the site, the mechanical interlocking electric three-way air door on the bypass pipeline is opened, and the sealing fan is started without starting the sealing fan heater. The two working conditions are flexibly adjusted and used by combining the temperature of the hearth of the incinerator, the oxygen content at the outlet of the economizer, the secondary air quantity and the like.

The invention relates to an automatic control system for a smoke backflow mechanical interlocking electric three-way air door of a garbage incinerator. Flue gas from the bag type dust collector outlet is sprayed into the incinerator through the mechanical interlocking electric three-way air door and the flue gas backflow fan, a pipeline between the bag type dust collector and the backflow fan is a main pipeline, a bypass pipeline and a sealing air pipeline are arranged at the inlet of the backflow fan, a sealing fan and a sealing fan heater are arranged on the sealing air main pipeline, sealing air from the sealing fan is connected with the mechanical interlocking electric three-way air door on the main pipeline and the bypass pipeline respectively through a sealing air branch pipeline, and a manual air door is arranged on the sealing air branch pipeline.

If the mechanical interlocking electric three-way air door is not arranged on a pipeline between the outlet of the bag type dust collector and the inlet of the return fan, only one electric air door baffle is simply used, and the condition of flue gas leakage due to insufficient process sealing performance of the air door baffle exists. The problem of flue gas leakage is effectively solved by using the mechanical interlocking electric three-way air door with the sealing function, and meanwhile, the problem of flue gas index disturbance caused by reverse flow of flue gas in a backward flowing mode is further solved due to the enhancement of the sealing performance, and in addition, a sealing air heater is arranged at the outlet of a sealing fan, so that the corrosion problem caused by temperature difference is avoided.