RU142085U1 - MINING CALORIFER INSTALLATION - Google Patents

Abstract

1. Mine air heater installation, including discharge fans and a number of plate elements installed in the lower part of the calorifer channel adjacent to the shaft of the mine, and oriented by the air flow, characterized in that the installation is equipped with a heat exchanger system mounted on plate elements, forming a closed loop circuit liquid heat or coolant, which includes control valves and devices for cooling and heating the heat or coolant. 2. The mine air heater according to claim 1, characterized in that a container for collecting moisture is placed under the plate elements.

Description

The utility model relates to the mining industry and can be used in the ventilation system of underground mining enterprises.

Known mine air heater, located in the wall of the mine building, the air into which is supplied due to the shaft depression created by the main fan installation (ROM) located on the ventilation shaft (RU 122698 U1, publ. 10.12.2012).

This hot air heater can supply both hot water from the boiler plant in the cold season, and chilled water for air conditioning in the warm season.

A disadvantage of the known installation is the small heat exchange surface of the heated (cooled) air with air heaters, as a result of which a large number of heat exchangers are required in the wall. In addition, the small surface of the heat exchange of air heaters with air requires a significant flow of coolant (coolant). If the heat carrier (coolant) is water supplied from the boiler plant (water cooling system), a large amount of energy will also be spent on its heating (cooling).

Closest to the claimed one is a mine air heater (RU 133877, publ. 10.27.2013), including pressure fans and an air heater with plate elements fixed in the lower part of the air duct, adjacent to the shaft of the mine and oriented by the flow of air entering the air heater channel. The heating elements of the heater installation are heated by electric current depending on the temperature of the outside air, and part of the heater channel adjacent to the barrel is made with an insulating layer.

The disadvantages of this invention are as follows:

- The air heater can be used only for heating air in the cold season. In the warm season, the unit is unable to cool the air entering the air supply barrel.

- a significant amount of electricity is consumed for heating the air. In terms of financial costs, heating the same volume of air under equal conditions (the same number of plates with the same overall dimensions) requires large economic investments.

The technical result consists in the creation of a mine air heater, which allows both heating and cooling of air with low energy consumption, i.e. having the ability to work effectively in cold and warm seasons.

The essence of the utility model is expressed in the fact that the mine air heater, which includes blowing fans and a number of plate elements installed in the lower part of the air duct, adjacent to the shaft of the shaft and oriented along the air flow, according to paragraph 1. of the formula, is equipped with a system fixed to the plate elements heat transfer tubes forming a closed loop of liquid heat or coolant circulation, which includes control valves and devices for cooling and heating the heat or coolant .

Using control valves and devices for heating the coolant, the inventive installation in the cold season is able to supply hot water to the system of heat exchange tubes that heat plate heating elements located along the air. Arriving due to the mine depression and the operation of pressure fans, the air washes the plate elements, heats up and enters the air supply barrel.

In the warm season, a coolant, for example, cold water, will be supplied to the shaft air heater to condition the air entering the air supply barrel. The coolant will be pre-cooled and circulated in the heat exchange tube system, cooling the plate elements.

In the case of using a mine air heater for air conditioning, a container for collecting moisture is placed under the plate elements (paragraph 2 of the formula), which allows condensate to be removed from the air duct.

The utility model is illustrated as follows.

In FIG. 1 schematically shows the placement of the inventive installation in the air duct of the mine, in FIG. 2 is a section AA in FIG. 1, top view.

In FIG. 3 shows a plate element with a coolant tube located therein, and in FIG. 4 - diagram of the coolant supply to the air heater.

1 - heater channel;

2 - air heater;

3 - plate element;

4 - outside air;

5 - air supply barrel;

6 - the lower part of the calorifer channel;

7 - thermal insulation layer;

8 - mine building;

9 - discharge fans;

10 - outside air drawn in through the mine building;

11 - heat transfer tubes;

12 - boiler installation;

13 - controlled gate valves;

14 - refrigerant cooling system;

15 - control device for actuators of valves;

16 - feed pumps.

Mine air heater works as follows. In the cold season, the outdoor air 4 enters the air duct 1 due to the shaft depression and the operation of the blower fans 9. Passing along the lower part of the air duct 6, the outdoor air 4 is heated in the air heater 2. Installation 2 consists, for example, of five plate elements 3 a thickness of 0.01 m, a width of 5 m and a length of 25 m. Tubes 11 are built into the plate elements 3, through which a heat carrier, for example, water or ethylene glycol, flows, i.e. they are the edges of the tubes 11.

The heat-insulating layer 7 is made, for example, of thermoglass (thermo glass) and is located around the perimeter of the lower part 6 of the calorifer channel 1. The plate elements 3 are heated by heat exchange tubes 11, through which the coolant flowing from the boiler installation 12 flows. In the warm season, changing the position controlled valves 13, a coolant, for example, cold water coming from the cooling system of the coolant 14, which transfers heat to the plate elements 3, is cooled into the air heater 2, cooling the warm outdoor air 4.

Outside air 10 is sucked into the air supply barrel 5 through the mine building 8. In order to mix the outdoor air 4 prepared in the air heater 6 with the suction 10 through the mine building 8, the blower fans 9 are configured to change their performance.

The heating capacity of the mine air heater is regulated by changing the performance of the blower fans 9 and changing the flow rate of the coolant both jointly and separately. The flow rate of the coolant can be controlled by the performance of the feed pumps 16 or by the position of the controlled valves 13, or by sharing them.

In the case of using a mine air heater 2 for air conditioning 4, under the plate elements 3, it is necessary to provide a container for collecting condensed moisture with the possibility of its pumping from the air duct 1.

A comparative analysis of the energy and financial costs of heating the air in the electric (according to the prototype) and the proposed installations are given in the table.

Table Type of air heater P _mouth W _conv C According to the prototype with electric heating plates 2880 69120 207 360.0 The claimed 2740 7365,12 29460.5

P _mouth - power plant for heating air from a temperature of -36 ° C to + 2 ° C, kW;

W _usl - the energy consumption spent on heating the air:

for the inventive air heater installation - the consumption of natural gas (m ³ / h),

for installation - prototype - power consumption (kW · h);

C - financial costs for energy, with an average price (according to the data for the first half of 2013) for electricity 3 rubles. per kWh and 4 rubles. per m ³ / h of natural gas.

From the calculations it is seen that the cost of the proposed installation is about 7 less.

Example

The installation of the claimed design operates in the region of the Verkhnekamsk deposit of potassium and magnesium salts (VKMKS), for which the outside temperature of the coldest five-day period is -36 ° C, and the warmest + 21.5 ° C (SNiP 23-01-99. Building standards and the rules of the Russian Federation. Construction climatology: approved by the resolution of the Gosstroy of Russia No. 49 dated 06/11/99. M: Gosstroy of Russia, 2000. 68 p). The volume of heated (cooled) air is 15,000 m ³ / min.

To cool and dry the outdoor air 4, its temperature should be reduced from 21.5 ° C to 4.9 ° C. When using the inventive air-heating unit 2 for air conditioning, according to calculations, it is necessary to supply water with a temperature of 2 ° C in the volume of 19552 kg / h (54.32 kg / s) as a heat carrier. The return temperature will be 6 ° C. in the process of cooling the air from a temperature of 21.5 ° C to 4.9 ° C, moisture of 4950 kg / h (1.36 kg / s) of condensed water will be deposited on the plates. In the absence of an air conditioning system, all this moisture will fall out in the mine.

The volume of precipitated moisture is quite large and, provided that its temperature is about 4-5 ° C, it can be used to supply refrigerant 14 to the cooling system.

Claims (2)

1. Mine air heater installation, including discharge fans and a number of plate elements installed in the lower part of the calorifer channel adjacent to the shaft of the mine, and oriented by the air flow, characterized in that the installation is equipped with a heat exchange tube system mounted on plate elements, forming a closed circulation loop liquid heat or coolant, which includes control valves and devices for cooling and heating the heat or coolant. 2. The mine air heater according to claim 1, characterized in that a container for collecting moisture is placed under the plate elements.

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