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Temperature control system for evaporator of heat medium heater

A technology of evaporator temperature and control system, which is applied to fluid heaters, lighting and heating equipment, etc. It can solve the problems of untimely control, failure to ensure that the temperature is in the required range, large deviation, etc., and achieve the effect of improving the response speed

Active Publication Date: 2015-03-25
JIANGSU CHALLEN FIBER S&T
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The disadvantage of the design of the above temperature control system is that when the primary heating medium supply temperature of the heating medium station changes (for example, the heating medium station fails, the fuel changes, and the primary heating medium flow changes), it will lead to untimely control and deviation. Large, so it cannot guarantee that the temperature in the spinning process is in the required range

Method used

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  • Temperature control system for evaporator of heat medium heater
  • Temperature control system for evaporator of heat medium heater

Examples

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Embodiment 1

[0013] Example 1: PID process of heat medium furnace evaporator temperature control system

[0014] figure 1 Shown is the PID flow chart of the heat medium furnace evaporator temperature control system of the present invention, the system includes a programmable controller PLC, an analog input module, an analog output module, a PID module, a primary heat medium inlet regulating valve, and a primary heat medium outlet , the secondary heating medium inlet, the secondary heating medium outlet and the electric heating furnace, wherein, the programmable controller PLC adopting the PID algorithm is respectively connected with the analog input module, the analog output module and the electric heating furnace, and the electric heating The furnace is respectively connected with the primary heat medium inlet regulating valve, the primary heat medium outlet, the secondary heat medium inlet, and the secondary heat medium outlet. The temperature of the secondary heat medium outlet is inp...

Embodiment 2

[0015] Embodiment 2: PID cascade control structure of heat medium furnace evaporator temperature control system

[0016] figure 2 It is a PID cascade control structure diagram of the heat medium furnace evaporator temperature control system of the present invention. Such as figure 2 As shown, among them, 1. Primary heat medium temperature is the secondary object; 2. The secondary heat medium temperature is the main object; 3. The primary heat medium temperature regulator is a secondary regulator; 4. The secondary heat medium temperature regulator is the main regulator.

[0017] The main regulator, that is, the secondary heat medium temperature regulator plays the role of fine adjustment and implements fixed value control; the secondary regulator, that is, the primary heat medium temperature regulator plays the role of coarse adjustment and implements follow-up control. The main loop is composed of main regulator, sub-regulator, actuator, sub-object (primary heat medi...

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Abstract

The invention discloses a temperature control system for an evaporator of a heat medium heater. A programmable logic controller (PMC) utilizing proportion integration differentiation (PID) algorithm is connected with an analog input module, an analog output module and an electric heating furnace respectively. The electric heating furnace is connected with a primary heat medium inlet adjusting valve, a primary heat medium outlet, a secondary heat medium inlet and a secondary heat medium outlet respectively. The secondary heat medium outlet temperature is input in the analog input module in a platinum resistor signal mode, the analog output module is connected with the primary heat medium inlet adjusting valve which is adjusted through the secondary heat medium outlet temperature, and a temperature sensor is connected into the analog input module. Preferentially, two serially connected temperature sensors are connected into the analog input module, and the primary heat medium inlet adjusting valve is controlled through the two serially connected temperature sensors to achieve constant value control. A PID cascade control module is further utilized, and accordingly, the response system of the whole system is improved.

Description

technical field [0001] The invention belongs to the field of textile electrical instrument control, and relates to heat treatment temperature control technology, in particular to a heat medium furnace evaporator temperature control system. Background technique [0002] In the process of chemical fiber production, the spinning box needs to be kept warm and heated, and the temperature of the spinning box should be adjusted according to the requirements of the spinning variety produced. Therefore, it is necessary to control the temperature within a certain range. The existing temperature control system technology is very mature. For example, the heat medium furnace evaporator temperature control system of Beijing Zhongli Machinery Engineering Technology Co., Ltd. (referred to as "Zhongli Machinery") has the following characteristics: [0003] The temperature control system includes: 1. The outlet temperature of the secondary heat medium is connected to the Siemens analog inpu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F24H9/20
Inventor 瞿振清沈向东朱章叶
Owner JIANGSU CHALLEN FIBER S&T
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