CN-120175421-B - Waste heat deep utilization device and method for mine exhaust

CN120175421BCN 120175421 BCN120175421 BCN 120175421BCN-120175421-B

Abstract

The invention relates to the technical field of waste heat utilization of mine exhaust, in particular to a device and a method for deeply utilizing waste heat of mine exhaust. According to the invention, mine exhaust waste heat is collected in the waste heat collection module comprising the baffle plate by means of working media, the working media are transmitted to the preheating module comprising the heating module to preheat incoming fresh air, the working media temperature, exhaust air temperature and wind pressure difference of the outlet and inlet of the waste heat collection module and the preheating module are collected through the waste heat utilization control system, the effective utilization parameters of the waste heat are analyzed and obtained, the power of a water pump and the power of a fan are adjusted, and the starting and stopping of the heating module are controlled by monitoring the working media temperature of the inlet of the preheating module. According to the invention, through analyzing the relative temperature change of the working medium and the gas in the device and combining the temperature difference between the working mediums, the power of the water pump and the power of the fan are dynamically adjusted, the waste heat of mine exhaust is fully utilized, the temperature of the working medium is monitored, and the additionally arranged heating module is controlled to prevent the ventilating system from freezing.

Inventors

LUAN ZHAOBIAO
WEI SHIHAO
LI QIANG
WANG WEIPENG
LIU XIANG
ZHAO ANXIN
MENG DELONG
XIAO DONGDONG
YANG HAOBO
YE LEI
Kou Gaoyuan
JIANG XIN
YUE XUDONG

Assignees

西安科技大学
陕西正通煤业有限责任公司

Dates

Publication Date: 20260508
Application Date: 20250408

Claims (8)

1. The device is characterized by being used for collecting mine exhaust waste heat in a waste heat collecting module comprising a baffle plate by means of working media, transmitting the working media to a preheating module comprising a heating module to preheat incoming fresh air, and further comprising a waste heat utilization control system, wherein the waste heat utilization control system comprises: the data acquisition module is used for acquiring working medium temperatures, exhaust temperatures and air pressure differences of the outlet and inlet of the waste heat collection module and the preheating module; The waste heat utilization evaluation module is used for acquiring a waste heat effective utilization parameter according to the relative change of the exhaust temperature of the waste heat collection module and the temperature of the working medium and combining the relative change of the exhaust temperature of the preheating module and the temperature of the working medium and the transmission loss of the working medium; the waste heat utilization adjustment module is used for adjusting the power of the water pump according to the temperature difference of the whole working medium of the waste heat collection module and the preheating module and combining the waste heat effective utilization parameter and the transmission loss of the working medium; the heating module control module is used for monitoring the temperature of the working medium at the inlet of the preheating module and controlling the starting and stopping of the heating module; The method for adjusting the power of the water pump comprises the following steps: combining the transmission loss according to the difference between the temperature of the whole working medium of the waste heat collection module and the temperature of the whole working medium of the preheating module to obtain module temperature difference parameters; When the adaptation coefficient is smaller than a preset adaptation threshold value, judging to adjust the water pump power, and acquiring the adjusted target water pump power according to the current water pump power and the module temperature difference parameter; Acquiring a first power adjustment coefficient by integrating the difference value between the air pressure difference of the exhaust inlet and the exhaust outlet of the waste heat collection module and the exhaust temperature; and acquiring a second power adjustment coefficient by integrating the difference value of the air pressure difference between the air exhaust inlet and the air exhaust outlet of the preheating module and the air exhaust temperature, and acquiring the adjusted target power of the preheating fan according to the current power of the preheating fan and the second power adjustment coefficient.
2. The mine exhaust waste heat deep utilization device according to claim 1, wherein the method for obtaining the waste heat effective utilization parameter comprises the following steps: according to the relative change of the exhaust temperature of the waste heat collection module and the temperature of the working medium, acquiring exhaust waste heat loss rate; According to the relative change of the exhaust temperature of the preheating module and the temperature of the working medium, acquiring exhaust waste heat utilization rate; The exhaust waste heat loss rate, the exhaust waste heat utilization rate and the transmission loss of the working medium are fused to obtain a waste heat effective utilization parameter, the exhaust waste heat utilization rate and the waste heat effective utilization parameter are positively correlated, and the exhaust waste heat loss rate and the transmission loss of the working medium are negatively correlated with the waste heat effective utilization parameter.
3. The mine exhaust waste heat deep utilization device according to claim 2, wherein the method for obtaining the exhaust waste heat loss rate comprises the following steps: According to the difference of the temperature of the working medium at the working medium inlet and the working medium outlet of the waste heat collection module, the temperature rise amplitude of the working medium is obtained; and acquiring exhaust waste heat loss rate according to the ratio relation between the exhaust temperature of an exhaust inlet of the waste heat collecting module and the exhaust waste heat loss amplitude, wherein the exhaust waste heat loss amplitude is positively correlated with the exhaust waste heat loss rate, and the exhaust temperature of an exhaust inlet of the waste heat collecting module is negatively correlated with the exhaust waste heat loss rate.
4. The mine exhaust waste heat deep utilization device according to claim 2, wherein the exhaust waste heat utilization rate obtaining method comprises the following steps: obtaining the preheating amplitude of the well entering fresh air according to the difference of the exhaust temperatures of the fresh air inlet and the fresh air outlet of the preheating module, and obtaining the cooling amplitude of the working medium according to the difference of the working medium temperatures of the working medium inlet and the working medium outlet of the preheating module; And acquiring exhaust waste heat utilization rate according to the ratio relation of the working medium temperature of the working medium inlet of the preheating module and the working medium waste heat loss amplitude, wherein the working medium waste heat loss amplitude is in negative correlation with the exhaust waste heat utilization rate, and the working medium temperature of the working medium inlet of the preheating module is in positive correlation with the exhaust waste heat utilization rate.
5. The mine exhaust waste heat deep utilization device according to claim 1, wherein the transmission loss obtaining method comprises the following steps: and acquiring transmission loss according to the difference between the working medium temperature of the working medium outlet of the waste heat collection module and the working medium temperature of the working medium inlet of the preheating module.
6. The mine exhaust waste heat deep utilization device according to claim 1, wherein the method for monitoring the temperature of the working medium at the inlet of the preheating module to control the start and stop of the heating module comprises the following steps: When the duration time that the working medium temperature of the working medium inlet of the preheating module is lower than a preset minimum temperature threshold exceeds a preset time domain length, starting the heating module until the duration time that the working medium temperature of the working medium inlet of the preheating module is higher than the preset minimum temperature threshold exceeds the preset time domain length, and closing the heating module.
7. The mine exhaust waste heat deep utilization device according to claim 1, wherein the adjusting of the water pump power and the adjusting of the fan power are both performed by adopting a PID control algorithm.
8. A method for deeply utilizing waste heat of mine exhaust, which is characterized in that the method utilizes the waste heat deep utilization device of the mine exhaust to utilize the waste heat of the mine exhaust.

Description

Waste heat deep utilization device and method for mine exhaust Technical Field The invention relates to the technical field of waste heat utilization of mine exhaust, in particular to a device and a method for deeply utilizing waste heat of mine exhaust. Background In the deep part of the mine, the temperature of the rock stratum is higher and heat is generated along with the mining activity of the mine, so that the temperature in the mine is gradually increased, and the excessive heat in the mine needs to be carried out through a ventilation system during the mine operation in order to ensure the mining work. Meanwhile, due to the safety work rule of the mine, the wellhead of the air inlet well of the ventilation system is required to be prevented from freezing in a low-temperature environment, so that the waste heat exhausted by the mine can be recovered and treated and conveyed into the ventilation system, and the waste heat cannot be frozen due to low external temperature. However, the existing mine exhaust utilization device directly inputs the treated mine exhaust into the water tank, and the heat conduction between working medium and gas is insufficient due to rapid rising and discharging of the gas after injection, so that waste heat is caused. Meanwhile, when the mine exhaust temperature is lower than the temperature required to be maintained, the device cannot effectively maintain the temperature, and the phenomenon of icing is easy to occur. Disclosure of Invention In order to solve the technical problems that the existing mine exhaust waste heat utilization device is insufficient in exhaust waste heat utilization and has icing risk, the invention aims to provide a mine exhaust waste heat deep utilization device and a mine exhaust waste heat deep utilization method, and the adopted technical scheme is as follows: the device is used for collecting mine exhaust waste heat in a waste heat collecting module comprising a baffle plate by means of working media, transmitting the working media to a preheating module comprising a heating module to preheat incoming fresh air, and further comprises a waste heat utilization control system, wherein the waste heat utilization control system comprises: the data acquisition module is used for acquiring working medium temperatures, exhaust temperatures and air pressure differences of the outlet and inlet of the waste heat collection module and the preheating module; The waste heat utilization evaluation module is used for acquiring a waste heat effective utilization parameter according to the relative change of the exhaust temperature of the waste heat collection module and the temperature of the working medium and combining the relative change of the exhaust temperature of the preheating module and the temperature of the working medium and the transmission loss of the working medium; the waste heat utilization adjustment module is used for adjusting the power of the water pump according to the temperature difference of the whole working medium of the waste heat collection module and the preheating module and combining the waste heat effective utilization parameter and the transmission loss of the working medium; and the heating module control module is used for monitoring the temperature of the working medium at the inlet of the preheating module and controlling the starting and stopping of the heating module. Further, the method for obtaining the parameters of effective utilization of the waste heat comprises the following steps: according to the relative change of the exhaust temperature of the waste heat collection module and the temperature of the working medium, acquiring exhaust waste heat loss rate; According to the relative change of the exhaust temperature of the preheating module and the temperature of the working medium, acquiring exhaust waste heat utilization rate; The exhaust waste heat loss rate, the exhaust waste heat utilization rate and the transmission loss of the working medium are fused to obtain a waste heat effective utilization parameter, the exhaust waste heat utilization rate and the waste heat effective utilization parameter are positively correlated, and the exhaust waste heat loss rate and the transmission loss of the working medium are negatively correlated with the waste heat effective utilization parameter. Further, the method for obtaining the exhaust waste heat loss rate comprises the following steps: According to the difference of the temperature of the working medium at the working medium inlet and the working medium outlet of the waste heat collection module, the temperature rise amplitude of the working medium is obtained; and acquiring exhaust waste heat loss rate according to the ratio relation between the exhaust temperature of an exhaust inlet of the waste heat collecting module and the exhaust waste heat loss amplitude, wherein the exhaust waste heat loss amplitude is positively correlated with the exhaust waste heat lo