SU1437609A1 - Boiler unit - Google Patents

Description

(21) 4186916 / 24-06; 4186663 / 24--06

(22) 01/26/87

(46) 11/15/88. Bup. No. 42

(71) Kommunarsk Mining and Metallurgical Institute

(72) V.I. KhuklaeVu V., P., Alekseev, V.G.Believ and A.D. Reshetn to

(53) 621.181,527 (088.8)

(56) USSR Author's Certificate W 879131, kp. F 22 V 31/02, J979.

USSR Author's Certificate No. 932102, cl. F 22 V 31/02, 1980. (54) BOILER ASSEMBLY

(57) The invention allows to increase the economy. A gas flue having heating surfaces included in circulation circuit 4 is connected to the furnace 1 of the unit. The external combustion chamber 6 has a burner 7 at one end and a heat exchanger 8 connected to the circuit 4. The chamber 6 is connected to the gas flue 2 by a bypass outlet pipe 11, connected to the second end of the camera-6. An additional supply of 1 bypass bypass pipe 12 is connected with one cog to chamber 6 in the zone of the burner 7, and the second to the gas duct after heating heights. The unit allows you to adjust the amount of gaseous fuel supplied to the burners 7, increase steam production and use the generated steam to generate additional electricity using low-calorie gaseous fuel. The discharge of the combustion products from chamber 6 into the gas duct 2 makes it possible to more efficiently use low-temperature heating surfaces due to the intensification of heat exchange. 1 il.

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The invention relates to a boiler and can be used in a power system,

The purpose of the invention is to increase the efficiency of

The drawing shows the boiler unit ..

The boiler unit contains a flue 2, connected to the furnace 1, equipped with heating surfaces in the form of an economizer 3, included in the heating circuit 4, and an air heater 5, as well as a remote chamber 6 with burners 7 on one U-end and a heat exchanger 8j connected to the circuit 4 through the drum 9 and the pump 10.

Chamber 6 is connected to gas duct 2 by means of a bypass outlet pipe 11 connected to the second end of chamber 6, and to one end of the last end of burner 7 in the burner 7 zone one outlet pipe 12 connected to the second duct after the heating surfaces of the economizer is connected 3 and the air heater 5 The boiler unit also contains a blower fan 13 with an air duct 34 of hot air, connected to the burner 7 of the chamber 6 gas pipeline 15 and also included in pipeline II; i; b Mococ IB, and pipeline 1 is sub- connected n to the exhaust chimney 17 e

The boiler unit works in the following manner.

The products of combustion of fuel give off a portion of the heat of the screen surface of the topt to the burners.

is regulated. The main part of the fuel,

the spirit after the air heater 6 through the duct 11 enters the burners of the furnace 1 "

When the boiler unit operates on pulverized fuel, when the calculated steam capacity is provided, the additional heat exchanger 8 and pump 9 are turned off, and combustion in chamber 6 is stopped. When switching the boiler from the pulverized fuel to burning low-calorie gaseous fuel of the boiler water part taken from the drum 9, by repeated forced circulation passed through a heat exchanger 8, where it is additionally heated due to the fact that in the chamber 6 burns the blast furnace gas, which is usually burned candle. The use of these surplus blast furnace gas in the boilers; 25 does not give due effect due to limited consumption of steam of low parameters of the boiler produced: m-utilizers, especially in summer

The presence of the heat exchanger 8 allows to significantly increase the steam capacity of the unit and use the generated steam to generate additional electricity using low-calorie gaseous fuel, in particular, excess

thirty

35

blast furnace gas. The amount of boiler water withdrawn from the drum 9 is determined by the reliability of the natural circulation system and the composition1 and enters the convective gas 40-15-25%.

ki

Stroke 2e where the 3 "water heater is sequentially passed through the economizer: 1-5. After the air heater 5, some of the gases 15 are removed by a pump 16 to the environment and a friend, and 45 parts through a pipeline 12 to the combustion chamber 6, where it is mixed with the product. mi combustion, the formation of low-calorie gaseous fuel (for example, an excess of blast-furnace gas) entering the burner 7 via gas line 15,

Air to burning is supplied by the blower fan 13 through the duct

The need to dilute the products of combustion of low-calorie gaseous fuel in chamber 6 with gases taken from gas duct 2 after air preheater 59 is determined by the reliability of the heat exchanger tubes 8, because at high temperatures of the combustion products (without dilution. With temperature-sensitive gases) the burnout may occur first rows of pipes.

The discharge of combustion products from chamber 6 into gas duct 2 into the zone in front of the water is 14, the cooled combustion vessels of the gas 55 55: concomitant 3 allows more measures 6 after heat exchanger 8 to effectively use low-temperature pipe 11 are dumped into convection surfaces heating (water gas code 4 to the zone in front of the water economizer and air preheater 3, the amount of the gas generator) due to heat intensification5

ten

20

U- t supplied to the burner

is regulated. The main part, probably 37609

fuel oil

the spirit after the air heater 6 through the duct 11 enters the burners of the furnace 1 "

When the boiler unit operates on pulverized fuel, when the calculated steam capacity is provided, the additional heat exchanger 8 and pump 9 are turned off, and combustion in chamber 6 is stopped. When switching the boiler from the pulverized fuel to burning low-calorie gaseous fuel of the boiler water part taken from the drum 9, by repeated forced circulation passed through a heat exchanger 8, where it is additionally heated due to the fact that in the chamber 6 burns the blast furnace gas, which is usually burned candle. The use of these surplus blast furnace gas in the boilers; 25 does not give due effect due to limited consumption of steam of low parameters of the boiler produced: m-utilizers, especially in summer

The presence of the heat exchanger 8 allows to significantly increase the steam capacity of the unit and use the generated steam to generate additional electricity using low-calorie gaseous fuel, in particular, excess

thirty

35

blast furnace gas. The amount of boiler water taken from the drum 9 is determined by the reliability of the natural circulation system and is 15-25%.

The need to dilute the products of combustion of low-calorie gaseous fuel in chamber 6 with gases taken from gas duct 2 after air preheater 59 is determined by the reliability of the heat exchanger tubes 8, because at high temperatures of the combustion products (without dilution. With temperature-sensitive gases) the burnout may occur first rows of pipes.

31437609

exchange, which also increases the cost-connected to the contour, the connectedness of the work, with the flue diverter

a pipeline connected to the second Formula of the invention, the end face of the chamber, characterized in that, for the purpose of increasing the Boiler Unit, which is economical, it is provided with an additional gas duct connected to the furnace, a supplying heating pipe bypass, connected at one end

10 to the combustion chamber in the burner zone and the external combustion chamber with a burner, another to the gas duct after one surface and the heat exchanger, heating.

Claims (1)

Claim A boiler unit containing a flue connected to the furnace, equipped with heating surfaces included in the circulation circuit, and an external combustion chamber with a burner at one end and a heat exchanger connected to the circuit, connected to the flue bypass pipe connected to the second _5th end of the chamber, characterized in that, in order to increase profitability, it is equipped with an additional supply bypass pipe connected at one end 10 to the combustion chamber in the zone of the burner, and the other to the flue after heating surfaces.