CN-119838257-B - Organic waste gas desorption condensation treatment method and system

CN119838257BCN 119838257 BCN119838257 BCN 119838257BCN-119838257-B

Abstract

The application relates to the technical field of flow control, in particular to a desorption condensation treatment method and system for organic waste gas, wherein the method comprises the steps of respectively obtaining condensation equipment in a condensation state at each moment, an internal temperature sequence and an external temperature sequence corresponding to the condensation equipment in a condensation regeneration state, and obtaining condensation completion moment after each condensation completion and regeneration completion moment after each condensation regeneration completion; the method comprises the steps of determining the characteristics of relative condensation efficiency, relative internal and external temperature differences and temperature gradients at each moment, determining the condensation progress at any historical condensation moment and the regeneration progress at any historical regeneration moment, determining the real-time regeneration progress, the real-time condensation progress and the condensation progress error at the current moment, and controlling the flow of a heating medium by combining a PID algorithm. The application regulates and controls the flow of the heating medium in real time, so that the condensation process and the regeneration process of the condensation capacity are synchronously carried out, thereby reducing the overall energy consumption of the condensation equipment and being beneficial to delaying the aging of the equipment.

Inventors

CHEN MINGLIANG
LIU SHUNSHUN
DA JIAN
XU XIANG
LIN NAN

Assignees

南京鼎靔达工程技术有限公司

Dates

Publication Date: 20260508
Application Date: 20250117

Claims (10)

1. The organic waste gas desorption condensation treatment method is characterized by comprising the following steps of: Placing temperature sensors at the same horizontal positions inside and outside the heat exchange pipeline in the space where the organic waste gas of the condensing equipment is located, and collecting an internal temperature sequence and an external temperature sequence corresponding to the condensing equipment in a condensing state at each moment and an internal temperature sequence and an external temperature sequence corresponding to the condensing equipment in a condensing regeneration state at each moment; Determining the relative condensation efficiency of each moment based on the difference condition of the internal temperature sequence and the external temperature sequence of the condensation equipment in the condensation state at each moment, analyzing the difference condition of the internal temperature sequence and the external temperature sequence of the condensation equipment in the condensation regeneration state at each moment, and obtaining the relative internal and external temperature difference at each moment; recording all times in the process of multiple times of condensation and regeneration of the condensation equipment before the current time as each historical condensation time and each historical regeneration time respectively, and respectively determining the condensation progress of any historical condensation time and the regeneration progress of any historical regeneration time based on any historical condensation time and the condensation completion time, any historical regeneration time and the regeneration completion time; determining the real-time regeneration progress at the current moment according to the relative internal and external temperature differences and the difference conditions of the temperature gradient characteristics between the current moment and all the historical regeneration moments of the current moment and the regeneration progress; according to the difference condition of the relative condensation efficiency between the current moment and all the historical condensation moments, combining the condensation progress to determine the real-time condensation progress at the current moment; And determining the condensation progress error at the current moment based on the real-time regeneration progress and the real-time condensation progress, and controlling the heat medium flow in the condensation equipment at the current moment in a condensation regeneration state by combining a PID algorithm.
2. The method for desorbing and condensing organic waste gas according to claim 1, wherein said determining the relative condensing efficiency at each time comprises: The difference between the internal temperature sequence and the external temperature sequence of the condensing equipment in a condensing state at each moment is formed into a condensing temperature difference sequence; and taking the ratio of the heat exchange temperature difference at each moment to a preset temperature difference threshold value as the relative condensation efficiency at each moment.
3. The method for desorption and condensation treatment of organic waste gas according to claim 1, wherein the obtaining of the relative internal and external temperature differences at each moment comprises: based on control input in a condensing system, acquiring the temperature of a heating medium and the temperature of a cooling medium input by the condensing system, and recording the difference between the temperature of the heating medium and the temperature of the cooling medium as the maximum temperature difference; the difference between the internal temperature sequence and the external temperature sequence in the condensing equipment in the condensing and regenerating state at each moment is formed into a regenerating temperature difference sequence; and taking the ratio of the condensation regeneration temperature difference to the maximum temperature difference at each moment as the relative internal and external temperature differences at each moment.
4. The method for desorption and condensation treatment of organic waste gas according to claim 3, wherein the calculation method of the temperature gradient characteristics at each moment is as follows: the difference between the regenerated temperature difference sequence at each moment and the previous moment is formed into a temperature difference speed sequence; Calculating the deviation of the temperature difference speed sequence as a temperature gradient characteristic at each moment, wherein if the deviation is smaller than a preset first value, the temperature gradient characteristic is assigned to the preset first value, and if the deviation is larger than a preset second value, the temperature gradient characteristic is assigned to the preset second value, and the preset first value is smaller than the preset second value.
5. The method for desorption condensation treatment of organic waste gas according to claim 1, wherein said determining the condensation progress at any one of the historic condensation time and the regeneration progress at any one of the historic regeneration time comprises: Taking the time interval between any one of the historical condensation time and the condensation completion time in each condensation process as the condensation progress of any one of the historical condensation time; And taking the time interval between any one of the historical regeneration time and the regeneration completion time in each condensation regeneration process as the regeneration progress of any one of the historical regeneration time.
6. The method for desorption and condensation treatment of organic waste gas according to claim 1, wherein the determining the real-time regeneration progress at the current time comprises: Taking the relative internal and external temperature difference of condensing equipment in a condensing regeneration state at the current moment as the temperature characteristic weight at the current moment; The calculation method of the temperature characteristic similarity between the current time and any historical regeneration time comprises the following steps: , wherein, For the current moment And the first Similarity of temperature characteristics at each of the historical regeneration times, At the current moment of the condensing equipment in the condensing regeneration state Is characterized by that the relative internal and external temp. difference, Is the first The relative internal and external temperature differences at each historical regeneration time, At the present moment for the condensing device in the condensing regeneration state Is characterized by the temperature gradient of (a), Is the first The temperature gradient characteristics of each historical regeneration time, At the present moment for the condensing device in the condensing regeneration state Is used for the temperature characteristic weight of the (c), Is a preset value larger than 0; And carrying out normalization processing on the temperature characteristic similarity between the current time and all the historical regeneration time, and carrying out weighted summation on the regeneration progress and the normalization result of all the historical regeneration time to serve as the real-time regeneration progress of the current time.
7. The method for desorption and condensation treatment of organic waste gas according to claim 1, wherein the current time is Is a real-time condensation progress of (a) The calculation method of (1) is as follows: , wherein, Is the first The condensation schedule at each historical condensation instant, Is the first The relative condensing efficiency at each historic condensing instant, For the current moment Is used for the condensation of the liquid crystal into the liquid crystal, For the current moment The number of all corresponding historic condensation moments, Is a preset value greater than 0.
8. The method for desorption and condensation treatment of organic waste gas according to claim 1, wherein the current time is Is the condensation progress error of (2) The calculation method of (1) is as follows: , wherein, For the current moment Is used for the real-time regeneration progress of the system, For the current moment Is used for the real-time condensation progress of the water heater, The redundancy time is preset.
9. The method for desorption and condensation treatment of organic waste gas according to claim 1, wherein the control of the flow of the heat medium in the condensation device in the condensation regeneration state at the current time comprises: And taking the condensation progress error as the input of a PID algorithm, outputting a flow control signal of the heat medium flow, and adjusting and controlling the heat medium flow in the condensation equipment in a condensation regeneration state at the current moment by the condensation system according to the flow control signal.
10. An organic waste gas desorption condensation treatment system comprising a memory, a processor and a computer program stored in said memory and running on said processor, characterized in that said processor, when executing said computer program, carries out the steps of a method for desorption condensation treatment of an organic waste gas according to any one of claims 1-9.

Description

Organic waste gas desorption condensation treatment method and system Technical Field The application relates to the technical field of flow control, in particular to a desorption and condensation treatment method and system for organic waste gas. Background Because the condensation requirement of organic waste gas is continuous, partial organic matters in the organic waste gas are easy to condense on the condensation pipeline, so that the condensation capacity of the condensation equipment is affected, and the condensation device is required to periodically liquefy, separate and collect the condensed organic matters on the pipeline so as to ensure that the condensation equipment can work normally. When the organic waste gas is condensed, two sets of condensing equipment are arranged for alternate use, and when one set of condensing equipment condenses the organic waste gas, the other set of condensing equipment liquefies the attached organic matters, so that the condensation capacity regeneration of the condensing equipment is completed. For the regeneration of the condensation capacity of the condensation equipment, the traditional method usually introduces a heating medium into the condensation pipeline to complete the liquefaction of the attached organic matters, so that the condensation capacity of the condensation equipment can be recovered as soon as possible. The traditional method adopts a heating medium with fixed flow, fixed time length and fixed temperature to liquefy the attached organic matters, however, the excessive heating medium flow can cause huge deformation of the condensing equipment in a short time, so that the ageing of the condensing equipment is easy to accelerate, and meanwhile, the condensing equipment is excessively heated, so that the energy consumption is increased. Therefore, in the desorption and condensation treatment process of the organic waste gas, the problems of increased energy consumption and equipment aging caused by improper control of the heat medium flow signal exist. Disclosure of Invention In order to solve the technical problems, a desorption and condensation treatment method and system for organic waste gas are provided to solve the existing problems. The application provides a method and a system for desorption and condensation treatment of organic waste gas, which comprise the following steps: in a first aspect, an embodiment of the present application provides a method for desorption and condensation treatment of organic waste gas, including the steps of: acquiring an internal temperature sequence and an external temperature sequence corresponding to condensing equipment in a condensing state at each moment, and an internal temperature sequence and an external temperature sequence corresponding to condensing equipment in a condensing regeneration state at each moment; Determining the relative condensation efficiency of each moment based on the difference condition of the internal temperature sequence and the external temperature sequence of the condensation equipment in the condensation state at each moment, analyzing the difference condition of the internal temperature sequence and the external temperature sequence of the condensation equipment in the condensation regeneration state at each moment, and obtaining the relative internal and external temperature difference at each moment; recording all times in the process of multiple times of condensation and regeneration of the condensation equipment before the current time as each historical condensation time and each historical regeneration time respectively, and respectively determining the condensation progress of any historical condensation time and the regeneration progress of any historical regeneration time based on any historical condensation time and the condensation completion time, any historical regeneration time and the regeneration completion time; determining the real-time regeneration progress at the current moment according to the relative internal and external temperature differences and the difference conditions of the temperature gradient characteristics between the current moment and all the historical regeneration moments of the current moment and the regeneration progress; according to the difference condition of the relative condensation efficiency between the current moment and all the historical condensation moments, combining the condensation progress to determine the real-time condensation progress at the current moment; And determining the condensation progress error at the current moment based on the real-time regeneration progress and the real-time condensation progress, and controlling the heat medium flow in the condensation equipment at the current moment in a condensation regeneration state by combining a PID algorithm. Preferably, the determining the relative condensation efficiency at each moment includes: The difference between the internal temperature sequence and the