I.e. hot blast stove, gas heater

 

(57) Abstract:

Usage: in the battery gas heaters. The inventive heater before the main heat-retaining nozzle 7 is placed an additional nozzle 8. Both nozzles are made of gas-permeable material and is equipped with heating elements 23 and 24. Between the heating elements 23 and 24 are installed partition 25. 1 Il.

The invention relates to heat engineering, namely the accumulator gas heaters.

Known i.e. hot blast stove, gas heater, comprising a housing with insulation, which contains heat-retaining nozzle and the elements of its heat, designed for periodic heating of portions of the gas due to the heat accumulated in the process of pre-heating of the nozzle.

The disadvantage of this heater is the low efficiency of heat transfer due to inadequate surface of the heat removal nozzles, consisting of rods, the minimum diameter of which is limited by strength conditions. The presence of the nozzle, is made up of many connected parts, determines the complexity of the design of the heater.

In the known device provided with the most advanced surface heat removal, high volumetric heat transfer coefficient, as well as increased utilization of the internal volume of the heater. Seal the nozzle in the housing at the end of the gas outlet provides the latest in terms of all-round compression that allows you to use the heater for heating the highly compressed gas, for example, in this model the high-pressure pipe. By such use at the outlet of the heater, you must get the hot gas, for which it is desirable to heat the nozzle to temperatures approaching the melting point of the material from which it is made. However, such a mode of operation in a known heater realize it is impossible, as when entering preheated to the maximum possible, for reasons of refractoriness, temperature nozzle gas at room temperature it will collapse under the action of temperature difference. Therefore, a well-known heater operate at lower the melting.

The aim of the invention is to increase efficiency by increasing the gas temperature at the outlet of the heater.

This objective is achieved in that in the known i.e. hot blast stove gas heater, comprising a housing in the cavity which are insulated, heat-retaining nozzle of the gas-permeable material compacted in the case at the end of the exit gas, and the elements of its heat in the cavity of the body, there is more heat-retaining nozzle of the gas-permeable material compacted in the case at the end of the gas inlet and is equipped with independent elements of its heat, while between elements heat the primary and secondary nozzles installed insulation wall, and the housing cavity on both sides of the septum communicated with each other.

Thus, the proposed device complies with the criteria of the invention of "novelty."

When the analysis is not detected known technical solutions with similar distinguishing the proposed device of the prototype of the signs. Therefore, the proposed solution meets the criterion of "substantial differences".

The drawing shows a diagram of the proposed caperal 2 to enter, and the other channel 3 to output of the working gas. On the inner surface of the housing 1 are elements of a thermal insulation 4, 5, 6. The main 7 and an additional 8 thermal storage nozzles are mounted with a gap between their ends 9, 10 and fixed in the housing 1 using a gas-tight metal cups 11, 12. Nozzles 7, 8 are made of gas-permeable heat-conducting material such as metal. The cups 11, 12 tightly cover the side surfaces of the nozzles 7, 8 and hermetically report output end 13 of the main nozzle 7 and the input end face 14 additional nozzles 8 through the pipes 15, 16 respectively with the output 3 input and 2 channels in the housing 1. This connection is provided by the presence of transient conical sockets 17, 18 between the cylindrical portions of the cups 11, 12 and the nozzles 15, 16, and installation of seals 19, 20 between the pipes 15, 16 and the body of the heater. In the annular cavities 21, 22 between the outer surfaces of the cups 11, 12 with nozzles 7, 8 and the inner surface of the insulation 4 are heating elements 23, 24 with independent adjustment of the input power. Between these cavities 21, 22 mounted heat-insulating partition wall 25, and these cavities communicated between the For ease of installation of the heater casing 1 is made detachable, and sealing parts is carried out with the help of seals 28.

In the embodiment, the heating elements 23, 24 can be mounted in the body of the nozzles 7, 8. In addition, can be used for induction nozzles by high frequency currents.

I.e. hot blast stove, gas heater works as follows.

Without a supply of gas at atmospheric pressure include heating elements 23, 24 and produce thermal storage heating nozzles. The main nozzle 7 is heated to a higher temperature than the additional. After reaching the nozzles 7, 8 preset temperature is made to blow gas through the heater. During a purge gas at room temperature through the channel 2 comes in a caulk tube 16 and through the tapered socket 18 in the end of the 14 additional nozzles 8. Passing through the nozzle 8, the gas is heated to an intermediate temperature, fills the free volume of the heater and enters the end face 9 of the main nozzle 7. Passed through her hot gas is collected in the funnel 17 and out through the compacted pipe 15 and an output channel 3 is supplied to the consumer. During the purge heater will balance the pressures in the cavities 21 and 22 through the free item is the top 25 and enables operation at high gas pressures.

The proposed additional heater nozzle 8 can be heated to the same as the nozzle in the prototype, the temperature, the maximum amount which is due to the ability of a material nozzle to withstand thermal shock. Thus for example the heating of the main nozzle 7 to a higher than in the prototype, the temperature, the level of which is limited only by its refractoriness. In the proposed design the destruction of the main nozzle purging does not occur, because at its input end 9 comes already passed through an additional nozzle 8 of the heated gas. Thus, the claimed device without changing the nomenclature used material can increase the temperature of the gas at the outlet of the heater, and therefore, its effectiveness in comparison with the prototype. (56) USSR Author's certificate N 205989, CL F 24 H 7/02, 1965.

I.e. hot blast stove, GAS HEATER, comprising a housing with inlet and outlet in the cavity which are insulated, heat-retaining nozzle and the elements of her heated, characterized in that, to improve efficiency by increasing the temperature of the gas, the nozzle is sealed in the housing near the end of the outlet, the cavity housing is equipped with independent elements of its heat, while primary and secondary nozzles are made of gas-permeable material between the heating elements of these nozzles installed insulation wall, and the housing cavity on both sides of the septum communicated with each other.

 

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