RU2334912C1 - Boiler plant - Google Patents

Abstract

FIELD: heating.

SUBSTANCE: invention is designed for utilisation of exhaust gas heat and may be used for heating enterprises. Boiler plant contains steam boiler, feed-water economiser, heat recovery unit, chemical water cleaning system, heat exchanger of chemically treated water, thermal dearator, heat exchanger, assembly hot well, water seal, pressure reducing plant, vent steam pipeline for thermal dearator, exhauster, main gas conduit, separation unit, condensate collector, by-pass gas conduit and gas-spreading heating with irradiating panels. Panels are linked with main gas conduit after feed-water economiser through outlet from main gas conduit and with heat recovery unit through retain gas conduit.

EFFECT: effective cooling of combustion gases, heating costs reduction and decrease of temperature drops in heated rooms.

2 dwg

Description

The invention relates to the field of heat supply, in particular to boiler plants.

The closest boiler plant of the same purpose to the claimed invention in terms of features is a boiler plant including a steam boiler, a water economizer, a heat exchanger, a chemical water treatment system, a chemically purified water heat exchanger, a thermal deaerator, a heat exchanger, a condensate tank, a hydraulic shutter, a reduction installation , thermal deaerator vapor pipeline, exhaust fan, main gas duct, separation device, condensate collector, bypass gas duct (see A. Kudinov A. Energy Saving in Heat Generating Units, Ulyanovsk: Publishing House UlSTU, 2000. - 139 p., Fig. 5.1, p. 90) and adopted as a prototype.

The reasons that impede the achievement of the technical result indicated below when using the well-known boiler plant adopted as a prototype include the fact that the use of a water (steam) centralized heat supply system is not efficient enough for heating the enterprise and does not allow sufficiently intensive cooling of the flue gases.

The essence of the invention is to provide effective cooling of flue gases and reduce the cost of heating the enterprise with a decrease in temperature differences in a heated room.

The technical result is the provision of effective cooling of flue gases and reducing the cost of heating the enterprise with a decrease in temperature differences in a heated room. The specified technical result during the implementation of the invention is achieved by the fact that in the proposed boiler installation comprising a steam boiler, a water economizer, a heat exchanger, a chemical water treatment system, a heat-treated water heat exchanger, a thermal deaerator, a heat exchanger, a pre-assembled condensate tank, a hydraulic shutter, a reduction installation, a pipeline thermal deaerator evaporator, smoke exhaust, main gas duct, separation device, condensate collector, bypass gas duct, the peculiarity is that It comprises heating gazoluchistogo enterprise system with radiating panels communicating with the main flue of the water after the economizer through branch from the main duct and the heat exchanger through the return outlet flue.

The drawings show

figure 1 is a prototype boiler installation;

figure 2 - the proposed boiler installation.

Information confirming the possibility of carrying out the invention with obtaining the above technical result are as follows.

The boiler installation includes a steam boiler 1, a water economizer 2, a heat exchanger 3, a chemical water treatment system 4, a chemically purified water heat exchanger 5, a heat deaerator 6, a heat exchanger 7, a condensate tank 8, a hydraulic shutter 9, a reduction unit 10, a thermal vaporization pipe 11 deaerator 6, exhaust fan 12, main gas duct 13, separation device 14, condensate collector 15, bypass gas duct 16, enterprise gas-heating system 17 with radiating panels 18 communicating with the main gas duct 13 pos e water economizer 2 through outlet 19 from the main duct 13 and a output heat exchanger 6 through the return gas duct 20.

The work of the proposed boiler installation is as follows.

In a steam boiler 1, the tail surface of which is a water economizer 2, the heat of combustion of the fuel is used to generate steam.

Preliminary heating of the source water is carried out in the heat exchanger 3, after which the water is sent to the chemical water treatment system 4. Next, the water is heated in a heat exchanger 5 of chemically purified water and enters the thermal deaerator 6. Further heating of the water is carried out in a water economizer 2, from which water is sent to the steam boiler 1.

The main steam stream generated in the steam boiler 1, enters the heat exchanger 7, where it condenses during heat transfer, the condensate is discharged into the condensate collection tank 8 through a hydraulic shutter 9. The heat carrier heated in the heat exchanger 7 is directed to the needs of consumers. Part of the steam generated by the steam boiler 1 is sent to the reduction unit 10. After reducing the pressure in the reduction unit, 10 steam is supplied to the heat exchanger 5 of chemically purified water as a heating medium and to the thermal deaerator 6 for deaeration of the make-up water and condensate from the condensate collection tank 8. Thermal deaerator 6 is connected to the heat exchanger 3 through the pipe 11 of the vapor of the thermal deaerator.

To create a draft in the chimney during the emission of flue gases into the atmosphere, a smoke exhaust fan 12 is used. The flue gases generated during the combustion of fuel in a steam boiler 1 are sent to a water economizer 2, where they are cooled to a temperature of 135 ... 150 ° С. Next, the flue gas stream is directed along the main gas duct 13 and is divided into three parts. The first part of the flue gas is sent to the heat exchanger 3, behind which the separation device 14 and the condensate collector 15 are located, the second part goes through the bypass duct 16 without cooling, the third part is fed to the enterprise’s gas-fired heating system 17 with radiating panels 18 for removal of heat 19. During heat transfer the source water in the heat exchanger 3 part of the flue gas is cooled together with the vapor from the thermal deaerator 6 and is sent to a separation device 14 to separate the drip moisture. The flue gas stream entering the gas-radiating heating system 17 of the enterprise with radiating panels 18 is cooled by heat transfer by radiation to a heated room. Due to what comfortable conditions are achieved in the room, temperature differences inside are reduced. On the return gas duct 20 from the gas-heating system 17 of the enterprise, a stream of chilled flue gases is supplied to a separation device 14 to remove droplet moisture. The drip moisture separated in the separation device 14 enters the condensate collector 15 and then to the condensate collecting tank 8. After separation, the cooled flue gases from the heat exchanger 3 and the gas heating system 17 of the enterprise are mixed with the uncooled flue gases passing through the bypass duct 16 and the smoke exhauster 12 through the chimney into the atmosphere. Thus, efficient cooling of flue gases is carried out with a reduction in the cost of heating the enterprise (with the refusal to use a water or steam heating system) while reducing temperature differences in a heated room.

Claims (1)

A boiler plant containing a steam boiler, a water economizer, a heat exchanger, a chemical water treatment system, a chemically purified water heat exchanger, a thermal deaerator, a heat exchanger, a condensate tank, a hydraulic shutter, a reduction unit, a thermal deaerator vapor pipe, a smoke exhaust, a main flue, a separation device, condensate collector, bypass duct, characterized in that it contains a gas-heating system of the enterprise with radiating panels in communication with the main duct ohm after the water economizer through the outlet from the main gas duct and with the output of the heat exchanger through the return gas duct.

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