A method for realizing the automatic adjustment of cycle time in coal-fired boiler ash removal process

A technology of cycle period and cycle time, applied in control/regulation systems, adaptive control, instruments, etc., can solve problems such as leaking pipe failures, ash pipeline blockages, etc., to achieve reliable control, environmental protection, good economic benefits and The effect of social benefit

CN109426148BActive Publication Date: 2021-10-19CNNC LANZHOU URANIUM ENRICHMENT
10 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-10-19

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention belongs to the technical field of coal-fired boiler ash removal production process control, and in particular relates to a method for realizing automatic adjustment of the cycle time of the coal-fired boiler ash removal process. If the ash removal control system is started, the first cycle time output is the minimum value; if the warehouse pump feed material level overrun signal is generated, the next cycle time output is a smaller value than the current ash removal cycle time value Level-1 value; under normal working conditions, that is, after the second cycle after the control system is started, and the feed material level overrun signal of the non-storage pump is generated, the fuzzy control rule is executed; the pressure of the ash pipe and the current ash removal cycle The cycle time is two input variables, the cycle time of the next ash removal cycle is the output variable, and a two-dimensional fuzzy controller is established. The invention can solve the problem that the ash conveying pipeline is prone to blockage and leaking faults during the ash removal production process.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention belongs to the technical field of coal-fired boiler ash removal production process control, and in particular relates to a method for realizing automatic adjustment of the cycle time of the coal-fired boiler ash removal process. Background technique

[0002] The ash removal production system is an important environmental protection technical measure adopted in the coal-fired boiler production system, and it is also one of the key technical measures for boiler production to achieve flue gas emission standards. In coal-fired boiler production enterprises, the ash removal production system generally adopts the positive pressure pneumatic process principle and process, and its process control adopts the timing sequence control method with fixed cycle time. The positive pressure pneumatic ash removal production system is composed of feed valve, discharge valve, warehouse pump, air intake device, exhaust balance valve, pressure switch, material...

Examples

Embodiment Construction

[0078] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0079] The method for realizing the automatic adjustment of the cycle time of the coal-fired boiler deashing process described in the present invention comprises the following steps:

[0080] Step 1: Select the control variables of the control system. The frequency of ash removal is the main factor affecting the blockage and wear of the ash conveying pipeline. A reasonable frequency of ash removal can eliminate the problem of ash conveying pipeline blockage and reduce the wear and tear of the ash conveying pipeline. degree, and the frequency of ash removal depends on the size of the cycle time of the ash removal process, so the cycle time of the ash removal process is selected as the controlled amount; The pressure of the pipe can be well controlled to change the amount of ash removal, so the pressure of the ash pipe is selected as the contro...