SU1377405A1 - Method of controlling mine heater units - Google Patents

Abstract

This invention relates to the mining industry. The purpose of the invention is to increase the reliability and efficiency of the heating unit. Measured and maintained at specified levels of air t-ru in the mine shaft and t-ru exhaust heat carrier by changing the flow rate of the primary coolant and the redistribution of air flow through the heater. The last coolant is additionally supplied to the entrance of the latter. The quality of the spent coolant supplied to the heater changes in proportion to the change in the material of the spent coolant relative to a given level,. This reduces the possibility of freezing the heaters and freezing the trunk. The life of the heater increases. Due to the intensive flushing of the internal cavities of the heaters at an increased rate of the heating coolant, the deposited grzzi and rust are removed. 1 ill., 1 tab.

Description

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4 About SP

1137

This invention relates to the mining industry and can be used to regulate mine heaters,

The purpose of the invention is to increase the reliability and efficiency of the heating unit operation by maintaining an optimal mode, maximizing the use of the incoming heat, maintaining the heat removal capacity at the required level and increasing the service life of the air heater.

To clarify the proposed method, we consider the following table, which characterizes the operating modes of the charger unit and the control area.

In the table, the following rules can be lowered without compromising the reliability of the heating unit, which ensures a more complete use of energy and a reduction in the heating coolant consumption.

The service life of the heaters is increased due to the possibility of regulating in the zone of insufficient heat transfer (mode 5 - aging of the heater), as well as due to intensive washing of the internal cavities of the heaters at an increased rate of heating coolant, which ensures deposition of dirt and rust. This increases the time between turnarounds.

The expansion of the scope of the proposed method due to

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T ,, respectively fak-20 so that it can be applied on

35

Nation:

Tichesky and set temperatures of the fulfilled heat carrier; t, t, are, respectively, the actual and set air temperature in the barrel; mode 1 - preset mode; mode 2 - insufficient heat supply; mode 3 - excessive heat supply; mode 4 - sufficient heat transfer, there is a reserve of the heater area (given the ambient air temperature and paraz meters of the primary coolant); mode 5 - insufficient heat transfer, the area of the heater is insufficient.

Modes 2 and 3 can take place in any heaters. Mode 5 characterizes the reduction of heat transfer in the process of natural aging of the heater.

Regulation of the proposed method allows you to enter the heater in a given mode (mode 1) from any mode. Thus, when using the proposed method, the regulation area is expanded in comparison with the known method due to the inclusion of mode 5, the mode of insufficient heat transfer (aging of the heater), which prolongs its service life. The reliability of the heating installation also increases, especially with significant temperature fluctuations. In addition, the possibility of freezing the heaters and freezing the trunk is reduced.

The efficiency of the heating unit is increased; since the temperature of the spent coolant after the heater is always high, at a given level, and this

40

43

50

55

air-conditioning units with both excess and insufficient heat removal, both on new and old installations.

In addition, the possibility of working on air heaters with a reduced calorific area is provided. This need arises when increasing the amount of air supplied to the barrel.

In this case, the known method of regulation requires the restructuring of the calliper facility.

The drawing shows the functional scheme of the device for carrying out the proposed method.

Through the supply line through the valve 1 and the mixing chamber 2, the heating coolant enters calorific 3. The cold air through the regulator 4, redistributing the air flow through the heaters, and the heaters 3 enters the shaft of the shaft with temperature tj, while part of the cold air can be supplied to the barrel, a calorific (air movement is shown by two lines).

The described part of the scheme makes it possible to regulate the mine heating installations by two channels. To regulate the third channel, an additional coolant extraction device is introduced into the circuit, consisting, for example, of a pump 5, a gate valve 6 and a pipeline connecting them so that a part of the heat transfer medium

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3

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five

heating units with both excessive and insufficient heat removal, both on new and old installations.

In addition, it is possible to work on air heaters with a reduced calorie area. This need arises when increasing the amount of air supplied to the barrel.

In this case, the known method of regulation requires the reorganization of the heater.

The drawing shows a functional diagram of the device for carrying out the proposed method.

The supply line through the valve 1 and the mixing chamber 2 enters the heating coolant into the heaters 3. The cold air through the regulator 4, redistributing the air flow through the heaters, and the heaters 3 enters the shaft with temperature tj, while some of the cold air can be fed into the barrel, the calorifier (air movement is shown by two dotted lines).

The described part of the scheme allows the regulation of mine heating installations through two channels. To regulate the third channel, an additional coolant extraction device is introduced into the circuit, consisting, for example, of a pump 5, a gate valve 6 and a pipeline connecting them in such a way that a portion of the spent coolant is fed through the mixing chamber 2 to the air heaters 3.

The regulation is carried out by means of a regulator 7, to which signals from sensors 8 and 9 are received, respectively, of air temperature in the barrel and return heat medium temperature, and from temperature setting devices 10 and 11. The heat exchanger leaves through the control valve 12.

As a regulator 7 it can be used both a specially developed regulator for the implementation of the method, as well as industrial-manufactured regulators interconnected in an appropriate way (

Claims (1)

Claims The method of controlling mine air-conditioning installations, including measuring and maintaining the air temperature in the mine shaft at a given level and the temperature of the spent coolant by changing the flow rate of the primary coolant and redistributing the air flow through the heater, so that and efficiency of operation of the calorific unit, the exhaust coolant is additionally supplied to the inlet of the heater, and the amount of the exhaust coolant supplied to the input of the heater, change in proportion to temperature changes from measures, regulators included in the equipment; automation equipment for air heaters 2Q of the heat transfer medium relative to AKU-3 installations). at a given level. Famous tj. t. .. tc tc. 15 7405-4 Claims The method of regulating mine heaters, including measuring and maintaining the air temperature in the mine shaft and the temperature of the spent heat carrier at predetermined levels by changing the flow rate of the primary coolant and redistributing the air flow through the air heater, so that, in order to increase reliability and the efficiency of the heating unit, the exhaust coolant is additionally supplied to the inlet of the heater, and the amount of spent coolant supplied to the input of the heater, change in proportion to temperature changes from ten 2Q of the heat carrier operated relative to the set level. c. Gji-ug  Max d .