CN218328247U - Heat exchange type heat accumulation type composite gas energy-saving furnace - Google Patents

Abstract

The utility model discloses a compound gas energy-saving stove of heat exchange formula heat accumulation formula, energy-saving stove includes the furnace body, add a cold air duct in tail gas blast pipe and the tail gas blast pipe through the furnace body is equipped with outward, the second grade preheating device that the rethread was equipped with, the circulating pipe, connect the chamber, devices such as second input tube and heat collecting pipe can fully convert the tail gas heat degree in with the tail gas blast pipe for the air in the cold air duct, realize the cold and hot exchange between tail gas and the air, then combine with the gas in transmitting the air of high temperature to the stove, make the gas burning rate improve, further make the productivity of industrial furnace reach the improvement, and the hot-air brings a large amount of physics heat into the stove in, the gas volume of supplying with the stove has been reduced, like this through the heat of cyclic utilization tail gas, reduce thermal emission, reach energy-concerving and environment-protective effect.

Description

Heat exchange type heat accumulation type composite gas energy-saving furnace

Technical Field

The utility model relates to a compound gas energy-saving furnace of heat exchange formula heat accumulation formula is applied to crucible furnace equipment technical field.

Background

The crucible furnace is the simplest smelting equipment and is mainly used for melting nonferrous metals with low melting points, such as copper, aluminum and alloys thereof. In the furnace, the alloy is melted in the crucible, heat is transferred to the furnace charge through the crucible, and the combustion products of the furnace charge are not in direct contact, so that the chemical components of the alloy are hardly influenced by furnace gas, and the temperature of the molten alloy is relatively uniform, which is the main advantage. During smelting, the metal is placed in a container called a crucible. The crucible is placed in a furnace and heated by diesel oil, heavy oil, coal gas or coke as fuel.

At present, if the gas aluminum melting furnace in the prior art needs to further reach the requirements of energy conservation and environmental protection, the gas aluminum melting furnace needs to be provided with a plurality of burners, a plurality of fans and other parts to realize the purpose, so that the structure of the gas aluminum melting furnace becomes complex, the manufacturing cost is promoted, high-temperature waste gas generated by the existing crucible furnace is directly discharged into the air, more heat can be lost, and the energy conservation and environmental protection are not enough.

Disclosure of Invention

High temperature waste gas that produces to the above-mentioned prior art among the crucible furnace directly discharges the air, can lose more thermal problem, the utility model provides a simple structure, reasonable in design, high and energy-concerving and environment-protective heat exchange type compound gas energy-saving furnace of rate of taking effect, it can give the temperature transmission of tail gas through cold and hot exchange device, and cold air duct one end can make the cold air flow in, and tail gas process tail gas exhaust pipe makes the air in the cold air duct obtain heating, and the air after the heating is from cold air duct other end input and gas contact.

The utility model provides a technical scheme that its technical problem adopted is: the energy-saving furnace comprises a furnace body, the furnace body outside be equipped with the communicating one-level tail gas blast pipe of furnace body, the tail gas vent of furnace body with one-level tail gas blast pipe intercommunication, be equipped with the one-level cold air duct in the one-level tail gas blast pipe, the one-level cold air duct is installed in the one-level tail gas blast pipe, one-level cold air duct one end is the air input end, the other end of one-level cold air duct is the steam output, and the steam output with the air inlet of furnace body is connected.

Further, the energy-saving furnace still includes second grade preheating device, second grade preheating device includes second grade tail gas blast pipe and second grade cold air duct, second grade tail gas blast pipe is located one-level tail gas blast pipe top and communicate with each other with one-level tail gas blast pipe, the second grade cold air duct is located one-level cold air duct top and communicate with each other with one-level cold air duct.

Furthermore, more than two circulating pipes are arranged on the outer side of the secondary cold air pipe and located between the secondary cold air pipe and the secondary tail gas exhaust pipe, one end of each circulating pipe is connected with the upper end of the secondary cold air pipe, and the other end of each circulating pipe is connected with the lower end of the secondary cold air pipe.

Furthermore, a connecting cavity is arranged between the first-stage tail gas exhaust pipe and the second-stage tail gas exhaust pipe, and the first-stage tail gas exhaust pipe and the second-stage tail gas exhaust pipe are communicated with the connecting cavity.

Furthermore, the primary cold air pipe comprises a first input pipe and a second input pipe, the upper end of the first input pipe is connected with the secondary cold air pipe, the lower end of the first input pipe is connected with one end of the second input pipe, the other end of the second input pipe is connected with the air inlet of the furnace body, and the diameter of the pipe orifice of the first input pipe is larger than the diameters of the pipe orifices of the secondary cold air pipe and the second input pipe.

Furthermore, a heat collecting pipe sleeved on the second input pipe is arranged on the outer side of the second input pipe, the heat collecting pipe is located between the primary tail gas exhaust pipe and the second input pipe, and a pipe orifice at the lower end of the primary tail gas exhaust pipe is communicated with the heat collecting pipe.

Furthermore, the circulating pipes are spirally distributed.

Further, a heat storage shell is arranged on the outer side of the first-stage tail gas exhaust pipe, the heat storage shell is fixedly connected with the furnace body, and a tail gas exhaust port of the furnace body is communicated with the heat storage shell and the first-stage tail gas exhaust pipe.

Furthermore, a heat insulation shell is arranged outside the secondary tail gas exhaust pipe.

Furthermore, more than one heat conduction hole is arranged on the heat insulation shell.

The utility model has the advantages that: the utility model provides a compound gas energy-saving furnace of heat exchange formula heat accumulation formula, it adds a cold air duct to be equipped with in tail gas blast pipe and the tail gas blast pipe outside the furnace body, the second grade preheating device that the rethread was equipped with, the circulating pipe, connect the chamber, devices such as second input tube and heat collecting pipe can fully convert the tail gas heat energy in the tail gas blast pipe for the air in the cold air duct, realize the cold and hot exchange between tail gas and the air, then combine the gas with the air transmission of high temperature to the stove in, make the gas burning rate improve, further make the productivity of industrial furnace reach the improvement, and the hot-air brings a large amount of physics heat into the stove in, the gas volume of supplying with the stove has been reduced, like this through the heat of cyclic utilization tail gas, reduce thermal emission, reach energy-concerving and environment-protective effect.

Drawings

Fig. 1 is a perspective view of a heat exchange type heat accumulating type composite gas energy-saving furnace provided by the present invention;

fig. 2 is a sectional view of the heat exchange type regenerative composite gas energy-saving furnace provided by the present invention.

Reference numerals are as follows: 1-furnace body; 11-exhaust vent; 2-a first-stage tail gas exhaust pipe; 21-a heat storage housing; 22-a circulation pipe; 3-primary cold air pipe; 31-a first input pipe; 32-a second input pipe; 4-a connecting cavity; 4-a connecting cavity; 5-a crucible; 6-heat conduction holes; 7-a secondary preheating device; 71-a secondary exhaust pipe; 711-thermally insulated housing; 72-a secondary cold air duct; 8-heat collecting pipe.

Detailed Description

In order to make the purpose, technical solution and effect of the present invention clearer and clearer, the following description refers to the accompanying drawings and examples to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Please refer to fig. 1-2, the utility model provides a compound gas energy-saving stove of heat exchange formula heat accumulation formula, the energy-saving stove includes furnace body 1, furnace body 1 outside is equipped with one-level tail gas blast pipe 2 communicating with furnace body 1 inside, furnace body 1 communicates with one-level tail gas blast pipe 2 through tail gas vent 11, crucible 5 sets up in furnace body 1, there is fuel can heat crucible 5 below crucible 5, can produce tail gas waste gas after the fuel burning, tail gas waste gas gets into one-level tail gas blast pipe 2 through tail gas vent 11, tail gas waste gas discharges from one-level tail gas blast pipe 2, be equipped with one-level cold air pipe 3 in one-level tail gas blast pipe 2, one-level cold air pipe 3 installs in one-level tail gas blast pipe 2, the steam output end of one-level cold air pipe 3 is connected with the air inlet of furnace body 1, cold air gets into one-level cold air pipe 3, outside air is cold air, cold air gets into in one-level cold air pipe 3, tail gas discharges from tail gas discharge pipe 2, because tail gas is hot waste gas, so tail gas can be the heating in one-level cold air pipe 3, the tail gas becomes hot gas after the cold gas heating, combine with the gas in the stove from other end output, just so can become gas burning with the gas, the improvement of gas burning. When the air is hot air or the fuel gas is hot fuel gas, the hot air or the hot fuel gas brings a large amount of physical heat into the furnace, so that on one hand, the fuel gas amount supplied to the furnace is reduced, and the fuel is directly saved; on the other hand, the increase of physical heat does not increase the volume of the smoke, and can reduce the heat loss of the smoke exhaust. For high-calorific-value fuel gas, the effect of preheating air is better than that of preheating fuel gas because the theoretical air quantity is large. For high temperature industrial furnaces, using low heating value gas, the air must be preheated. Therefore, the preheating of air has special practical significance for expanding the utilization of low-heating-value fuel gas energy. The higher the preheating temperature of the air and gas, the more physical heat is brought into the furnace, and the higher the theoretical combustion temperature of the gas. The combustion speed of the fuel gas is improved, the higher the temperature of air and the fuel gas in the combustion process of the fuel gas is, the faster the combustion reaction is, and the higher the flame propagation speed is. The flame will shorten when other conditions are the same. This is beneficial for the furnace to use a centralized end for heat supply, and to increase the average radiant temperature and pressure of the furnace, thereby increasing the furnace capacity. Thus, the hot waste gas is recycled, and the method is environment-friendly and energy-saving. The air inlet of the furnace body is blocked by the furnace body and is not marked, the air inlet of the furnace body is the prior art, the air inlet of the heat exchange type heat accumulating type composite gas energy-saving furnace is positioned at the rear of the section view (shown in figure 2), and the air inlet is connected with the furnace body, is used for the inlet of hot air and is convenient to be arranged by being combined with gas.

In this embodiment, the energy saving furnace further includes a second-stage preheating device 7, the second-stage preheating device 7 mainly performs a preheating function, the second-stage preheating device 7 includes a second-stage tail gas exhaust pipe 71 and a second-stage cold air pipe 72, the second-stage tail gas exhaust pipe 71 is located above the first-stage tail gas exhaust pipe 2 and is communicated with the first-stage tail gas exhaust pipe 2, the second-stage cold air pipe 72 is located above the first-stage cold air pipe 3 and is communicated with the first-stage cold air pipe 3, cold air enters the second-stage cold air pipe 72, when tail gas is exhausted from the second-stage tail gas exhaust pipe 71, the cold air can be preheated first and then enters the first-stage cold air pipe 3, so that the first-stage cold air pipe is preheated by the second-stage cold air pipe, the temperature of the air in the first-stage cold air pipe is increased by reheating by the first-stage tail gas exhaust pipe 2, the air temperature of the first-stage cold air pipe is increased, and the combustion reaction is accelerated when the high-temperature air is input into the furnace to be combined with gas, and the flame propagation speed is increased.

In this embodiment, more than two circulation pipes 22 are disposed outside the secondary cold air pipe 72, and the circulation pipes 22 are located between the secondary cold air pipe 72 and the secondary exhaust gas exhaust pipe 71, one end of the circulation pipe 22 is connected to the upper end of the secondary cold air pipe 72, the other end of the circulation pipe 22 is connected to the lower end of the secondary cold air pipe 72, and the circulation pipe 22 is connected to the secondary cold air pipe 72, so that air flows through the circulation pipes to be preheated, and the contact surface between air and exhaust gas can be increased, so that more heat of the exhaust gas is transferred to the air.

In this embodiment, be equipped with between one-level tail gas exhaust pipe 2 and the second grade tail gas exhaust pipe 71 and be connected chamber 4, one-level tail gas exhaust pipe 2 and second grade tail gas exhaust pipe 71 with be connected chamber 4 intercommunication, connect chamber 4 and slowly carry the tail gas for second grade tail gas exhaust pipe 71, can make tail gas stop more at second grade tail gas exhaust pipe 71 or store more in connecting chamber 4, the heat and cold exchange time between tail gas and the air will prolong like this, just can give the air with more heat conversion of tail gas.

In this embodiment, the primary air-conditioning duct 3 includes a first input duct 31 and a second input duct 32, the upper end of the first input duct 31 is connected to the secondary air-conditioning duct 72, the lower end of the first input duct 31 is connected to one end of the second input duct 32, the other end of the second input duct 32 is connected to the air inlet of the furnace body 1, the diameter of the orifice of the first input duct 31 is larger than the diameter of the orifice of the secondary air-conditioning duct 72 and the second input duct 32, the larger the diameter of the orifice of the first input duct 31 can accommodate the larger amount of air, the smaller the diameter of the orifice of the secondary air-conditioning duct 72 and the second input duct 32 is because the secondary air-conditioning duct 72 and the second input duct 32 are one of the air input and the air output, the preheated air is input, but the temperature is not high enough, if the heat exchange time between the preheated air and the tail gas is prolonged, the temperature of the secondary air-conditioning duct 72 is higher than the diameter of the first input duct 31, if the heat exchange time between the preheated air and the tail gas is prolonged, the temperature of the secondary air input duct is not high enough, the tail gas flow rate is also lower than the heat exchange time between the first input duct 31, if the tail gas flow rate of the primary air input duct 31 is increased, and the tail gas combustion furnace body 1, and the tail gas flow rate of the tail gas flow is increased, and the tail gas flow rate of the furnace body is increased.

In this embodiment, the second input pipe 32 outside is equipped with the thermal-collecting tube 8 of suit at second input pipe 32, thermal-collecting tube 8 is located between one-level tail gas exhaust pipe 2 and the second input pipe 32, one-level tail gas exhaust pipe 2's lower extreme and thermal-collecting tube 8 intercommunication, tail gas part in one-level tail gas exhaust pipe 2 can be to flowing into in thermal-collecting tube 8, the heat degree of the tail gas in messenger thermal-collecting tube 8 exchanges for the air more fast, and because thermal-collecting tube 8 sets up between one-level tail gas exhaust pipe 2 and second input pipe 32, the tail gas that just flows into one-level tail gas exhaust pipe 2 can be immediately transmitted for thermal-collecting tube 8, the heat exchange of the tail gas in the thermal-collecting tube 8 gives the air, the heat exchange of progressive formula can make the temperature of air rise more fast.

In this embodiment, the circulation pipes 22 are spirally distributed so that the air of the circulation pipes 22 can be divided.

In this embodiment, a heat storage casing 21 is disposed outside the primary exhaust gas pipe 2, the heat storage casing 21 is fixedly connected to the furnace body 1, and the exhaust gas outlet 11 of the furnace body 1 is communicated with the heat storage casing 21 and the primary exhaust gas pipe 2.

In this embodiment, a heat insulating housing 711 is provided outside the secondary exhaust pipe 71.

In this embodiment, the heat insulating housing 711 is provided with one or more heat conduction holes 6.

It is to be understood that the invention is not limited to the above-described embodiments, and that modifications and variations may be made by those skilled in the art in light of the above teachings, and all such modifications and variations are intended to be included within the scope of the invention as defined in the appended claims.

Claims (10)

1. The utility model provides an energy-conserving stove of compound gas of heat exchange formula heat accumulation formula, its characterized in that, energy-conserving stove includes furnace body (1), furnace body (1) outside be equipped with communicating one-level tail gas exhaust pipe (2) of furnace body (1), tail gas exhaust port (11) of furnace body (1) with one-level tail gas exhaust pipe (2) intercommunication, be equipped with one-level cold air pipe (3) in one-level tail gas exhaust pipe (2), install one-level cold air pipe (3) in one-level tail gas exhaust pipe (2), one-level cold air pipe (3) one end is air input end, the other end of one-level cold air pipe (3) is the steam output end, and the steam output end with the air inlet of furnace body (1) is connected.

2. The heat exchange heat accumulating type composite gas energy-saving furnace according to claim 1, wherein the energy-saving furnace further comprises a secondary preheating device (7), the secondary preheating device (7) comprises a secondary tail gas exhaust pipe (71) and a secondary cold gas pipe (72), the secondary tail gas exhaust pipe (71) is positioned above the primary tail gas exhaust pipe (2) and communicated with the primary tail gas exhaust pipe (2), and the secondary cold gas pipe (72) is positioned above the primary cold gas pipe (3) and communicated with the primary cold gas pipe (3).

3. The heat exchange type heat accumulating type composite gas energy-saving furnace according to claim 2, wherein more than two circulating pipes (22) are arranged on the outer side of the secondary cold air pipe (72), the circulating pipes (22) are positioned between the secondary cold air pipe (72) and the secondary tail gas exhaust pipe (71), one end of each circulating pipe (22) is connected with the upper end of the secondary cold air pipe (72), and the other end of each circulating pipe (22) is connected with the lower end of the secondary cold air pipe (72).

4. The heat exchange type heat accumulating type composite gas energy-saving furnace according to claim 2, wherein a connecting cavity (4) is arranged between the primary tail gas exhaust pipe (2) and the secondary tail gas exhaust pipe (71), and the primary tail gas exhaust pipe (2) and the secondary tail gas exhaust pipe (71) are communicated with the connecting cavity (4).

5. The heat exchange type heat accumulating type composite gas energy-saving furnace according to claim 2, wherein the primary cold air pipe (3) comprises a first input pipe (31) and a second input pipe (32), the upper end of the first input pipe (31) is connected with the secondary cold air pipe (72), the lower end of the first input pipe (31) is connected with one end of the second input pipe (32), the other end of the second input pipe (32) is connected with the gas inlet of the furnace body (1), and the diameter of the pipe orifice of the first input pipe (31) is larger than the diameters of the pipe orifices of the secondary cold air pipe (72) and the second input pipe (32).

6. The heat exchange type heat accumulating type composite gas energy-saving furnace according to claim 5, wherein a heat collecting pipe (8) sleeved on the second input pipe (32) is arranged on the outer side of the second input pipe (32), the heat collecting pipe (8) is positioned between the primary tail gas exhaust pipe (2) and the second input pipe (32), and a pipe opening at the lower end of the primary tail gas exhaust pipe (2) is communicated with the heat collecting pipe (8).

7. The heat exchange type regenerative composite gas energy-saving furnace according to claim 3, wherein the circulating pipes (22) are spirally distributed.

8. The heat exchange type heat accumulating type composite gas energy-saving furnace according to claim 4, wherein a heat accumulating shell (21) is arranged outside the primary tail gas exhaust pipe (2), the heat accumulating shell (21) is fixedly connected with the furnace body (1), and the tail gas exhaust port (11) of the furnace body (1) is communicated with the heat accumulating shell (21) and the primary tail gas exhaust pipe (2).

9. The heat exchange type heat accumulating type composite gas energy-saving furnace according to claim 2, wherein a heat insulation shell (711) is arranged outside the secondary exhaust gas exhaust pipe (71), and the heat insulation shell (711) is sleeved on the exhaust gas exhaust pipe (71).

10. The heat exchange type regenerative composite gas energy-saving furnace according to claim 9, wherein the heat insulation housing (711) is provided with more than one heat conduction hole (6).

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