An automatic ash discharging control system for a biomass boiler

Abstract

The utility model relates to a kind of automatic ash removal control system of biomass boiler, including boiler body, boiler ash bucket, screw rod ash scraper, chain ash scraper, ton bag, automatic check weight scale, PLC controller and control signal line;Boiler ash bucket is located directly below boiler body and is communicated with the biomass dry ash outlet of boiler body bottom, screw rod ash scraper is located directly below boiler ash bucket, chain ash scraper is perpendicular with the running direction of screw rod ash scraper, and is located directly below it, ton bag is located directly below chain ash scraper outlet, to the automatic check weight scale;PLC controller is connected with the screw rod ash scraper motor controller of boiler body, chain ash scraper motor controller and automatic check weight scale controller respectively by control signal line.This new automatic ash removal control system is suitable for biomass boiler automatic ash removal process, for the rapid automatic removal of various biomass boiler burnout material.The system can realize biomass boiler field unmanned.The utility model has simple structure, and it is safe and reliable.

Description

Technical Field

[0001] This utility model relates to an automatic ash removal control system for biomass boilers. Background Technology

[0002] Biomass boilers have a poor production environment, with ash discharged from a single ash discharge point at the tail end of the furnace, easily leading to poor ash discharge and coking inside the furnace. Furthermore, the production process requires frequent worker access to the boiler room to clean the ash. To reduce the labor load on boiler operators and lower labor costs, an automatic ash removal system is needed to improve the production environment of the biomass boiler room and simultaneously reduce production costs. The ash discharge from biomass fuel combustion is intermittent, and the ash is lightweight, hot, but cools down rapidly. Setting a reasonable ash discharge rate can achieve continuous ash discharge while avoiding water pollution and biomass ash fertility loss caused by traditional water cooling, while also reducing ash weight and transportation costs. Utility Model Content

[0003] The problem to be solved by this utility model is to provide an automatic ash discharge control system for biomass boilers, which can realize continuous dry ash discharge and automatic weighing of biomass boilers.

[0004] The technical solution provided by this utility model is: an automatic ash removal control system for biomass boilers, including a boiler body, a boiler ash hopper, a screw ash scraper, a chain ash scraper, a ton bag, an automatic checkweigher, a PLC controller, and control signal lines; the boiler ash hopper is located directly below the boiler body and connected to the biomass dry ash outlet at the bottom of the boiler body; the screw ash scraper is located directly below the boiler ash hopper and welded to it; the chain ash scraper is perpendicular to the running direction of the screw ash scraper and located directly below it; the ton bag is located directly below the outlet of the chain ash scraper and is placed on the automatic checkweigher; the PLC controller is connected to the screw ash scraper motor controller, the chain ash scraper motor controller, and the automatic checkweigher controller of the boiler body respectively through control signal lines.

[0005] The screw scraper motor, chain scraper motor, and automatic checkweigher are activated by PLC commands.

[0006] This invention collects the dry biomass ash produced by the biomass boiler body to a screw scraper at the lower end of the ash hopper. The screw scraper continuously transports the dry biomass ash to a chain scraper. The chain scraper operates synchronously and continuously, transporting the dry biomass ash to a ton bag. This process is slow, ensuring that the temperature of the dry biomass ash entering the ton bag drops to room temperature. This invention avoids the low level of automation in traditional water-cooled mechanical ash removal and can stably transport dry biomass ash externally. This invention has a simple structure and is safe and reliable. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0008] See Figure 1 This utility model includes a boiler body 1, a boiler ash hopper 2, a screw ash scraper 3, a chain ash scraper 4, a ton bag 5, an automatic checkweigher 6, a PLC controller 7, and control signal lines 8. The boiler body 1 is divided into three sections, each with a boiler ash hopper 2. The boiler ash hopper 2 is located directly below the boiler body 1 and connected to the bottom biomass dry ash outlet of the boiler body, collecting ash in sections. The screw ash scraper 3 is located directly below the boiler ash hopper 2 and is welded or flanged to the bottom outlet of the boiler ash hopper 2. The chain ash scraper 4 is perpendicular to the running direction of the screw ash scraper 3 and located directly below it. The ton bag 5 and the automatic checkweigher 6 are located directly below the outlet of the chain ash scraper and are mounted on the automatic checkweigher 6. The PLC controller 7 is connected to the motor controller of the screw ash scraper 3, the motor controller of the chain ash scraper 4, and the controller of the automatic checkweigher 6 via the control signal lines 8. The dry ash scraped from each screw ash scraper 3 is uniformly transported to the ton bag 5. The transport process is slow to allow the ash from the furnace to cool down as quickly as possible. The automatic checkweigher 6 detects the set weight and then alarms to prompt the forklift operator to replace the ton bag 5. The PLC controller 7, based on the boiler operating parameters, coordinates the screw ash scraper motors, chain ash scraper motors, and the automatic checkweigher to achieve automatic, stable, and continuous discharge of biomass burnt-out materials.

[0009] The automatic ash discharge system of this invention is characterized by continuous ash discharge and automatic weighing. During operation, the PLC calculates the hourly ash and slag output based on the total feed signal. Accordingly, it sends signals to the screw ash discharger motor, the chain scraper motor, and the automatic checkweigher until the total weight of the ton bags reaches the set value. A signal is then sent to remind the heating system to remove the ton bags. This invention features a simple structure and is safe and reliable.

Claims

1. An automatic ash removal control system for biomass boilers, characterized in that: The system includes the boiler body, boiler ash hopper, screw ash scraper, chain ash scraper, ton bag, automatic checkweigher, PLC controller, and control signal lines. The boiler ash hopper is located directly below the boiler body and connected to the biomass dry ash outlet at the bottom of the boiler body. The screw ash scraper is located directly below the boiler ash hopper and welded to it. The chain ash scraper runs perpendicular to the screw ash scraper and is located directly below it. The ton bag is located directly below the outlet of the chain ash scraper and is mounted on the automatic checkweigher. The PLC controller is connected to the screw ash scraper motor controller, chain ash scraper motor controller, and automatic checkweigher controller in the boiler body via control signal lines.

2. The automatic ash removal control system for biomass boilers according to claim 1, characterized in that: The boiler body is divided into three sections. Each section has a biomass dry ash outlet at the bottom. Below each biomass dry ash outlet is a boiler ash hopper connected to the biomass dry ash outlet. Each boiler ash hopper has a screw scraper at the bottom outlet.

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