JPS609632Y2 - liquid heating device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a liquid heating device suitable as a dyeing pot in the dyeing industry, particularly in the yarn dyeing and black dyeing industry.

In a typical prior art technique, a flange is spirally protruded from the outer periphery of the strip, and the flange and lid frame form a spiral detour smoke path, which directs combustion gas from below to above. There is a water boiler (Utility Model Application Publication No. 760) that has been made available for distribution.

However, while the temperature of the combustion gas decreases as it moves upward, the distance between the top and bottom of the brim is the same across the top and bottom of the strip, so even though the temperature of the combustion gas decreases in the upper and lower detour flutes Sufficient contact time cannot be secured, resulting in poor heat transfer efficiency.

Furthermore, since the cylindrical strip is provided with a spiral brim, a dead space is created in the upper part of the detour smoke path through which combustion gas does not flow, which also reduces the overall thermal efficiency.

An object of the present invention is to provide a liquid heating device with improved thermal efficiency.

The liquid heating device according to the present invention has a heating chamber whose horizontal cross section is circular by lining the inside of the furnace with furnace material held by a wire mesh, and the heating chamber has a flange to be placed on the upper part of the furnace. A cylindrical liquid tank with a bottom is installed concentrically, and a spiral guide member is provided on the outer circumferential surface of the liquid tank so that the pitch between them becomes larger as it goes upward. A spiral combustion gas passage is formed in the space between the inner peripheral surface of the heating chamber and the inner peripheral surface of the heating chamber.

This allows the relatively low temperature combustion gas to flow through at a relatively low speed.

Therefore, the contact time with the outer peripheral surface of the liquid tank becomes longer, and thermal efficiency is improved.

Further, a burner is provided at the bottom of the furnace body at a position corresponding to the lower end of the guide member and injects combustion gas tangentially into the heating chamber along the winding direction of the guide member. has an inclined part extending upward in a direction away from the burner to form a recess in the part facing the burner, and an exhaust hole communicating with the combustion gas passage is provided in the upper side of the furnace body; The upper end portion 4a of the guide member is arranged at a position spaced apart from the exhaust hole in the circumferential direction along the flow direction of combustion gas and spaced downward from the flange.

Therefore, the combustion gas that has passed the upper end 4a of the guide member is
The combustion gas is divided to the left and right in FIG. 4, which will be described later, so that the combustion gas can flow smoothly and be guided to the exhaust hole 12 without being stagnant.

Therefore, there is no dead space where combustion gas does not flow, thereby improving the overall thermal efficiency.

FIG. 1 is a longitudinal sectional view of one embodiment of the present invention, FIG. 2 is a plan view showing a partially cutaway cross section, and FIG. 3 is a left side view of the liquid heating device shown in FIG. The figure is viewed from section line II in FIG.

A heating chamber 2 having a right cylindrical shape and having a vertical axis is formed in a furnace body 1 of the present liquid heating device.

A liquid tank 3 is installed in the heating chamber 2 from above.

This liquid tank 3 has a bottomed right cylindrical shape and is arranged concentrically with the heating chamber 2 .

The outer peripheral surface of the liquid tank 3 is smaller than the inner peripheral surface of the heating chamber 2, and this space is formed.

A spiral guide member 4 is fixed to the outer peripheral surface of the liquid tank 3 in this space.

The guide member 4 and the liquid tank 3 are made of metal, and the guide member 4 is formed into a band shape.

A spiral combustion gas passage 5 is formed in the space between the outer peripheral surface of the liquid tank 3 and the inner peripheral surface of the heating chamber 2 by the guide member 4 .

A flange 6 is fixed to the upper end of the liquid tank 3, and the flange 6 closes the upper part of the combustion gas passage 5.

A combustion chamber 8 is formed on the lower side of the furnace body 1 at a position corresponding to the lower end of the guide member 4 . A gas burner 7 that injects combustion gas in a tangential direction is installed.

At the bottom of the heating chamber 2 in the vicinity of the combustion chamber population 8, there is a recess 9 for adjusting the degree of contact of the combustion flame and combustion gas with the bottom of the liquid tank 3, and a slope 10 extending in a direction away from the inlet 8. It is formed in a stepped shape.

As a result, the bottom surface 11 of the heating chamber 2 approaches the bottom of the heating tank 3 on the downstream side in the flow direction of the combustion flame and combustion gas.

Therefore, when the combustion flame and combustion gas from the gas burner 7 swirl in the heating chamber 2 along the winding direction of the guide member 4 in the direction of arrow 13 in FIG. The heat transfer amount distribution can be made uniform or almost uniform.

FIG. 4 is a developed view in the circumferential direction of the portion of the liquid tank 3 located within the heating chamber 2, in which the combustion gas passage 5 is clearly shown.

The pitch of the guide member 4 increases upward,
In other words, lK12<13 in FIG.

. Therefore, as the combustion gas from the gas burner 7 flows downstream of the combustion gas passage 5, the combustion gas velocity decreases.

Therefore, the combustion gas whose temperature decreases toward the upper part of the liquid tank 3 flows at a relatively low speed, thereby improving thermal efficiency.

An exhaust hole 12 communicating with the upper part of the combustion gas passage 5 is formed in the upper part of the furnace body 1 .

This exhaust hole 12 extends in the radial direction of the heating chamber 2, has an axis parallel to the axis of the gas burner 7, and is provided in line with the gas burner 7.

The upper end portion 4a of the guide member 4 is spaced from the exhaust hole 12 by a circumferential angle θ along the combustion gas flow direction 13, and is spaced below the flange 6.

This angle θ is selected, for example, in the range 180° C. to 270° C., for example 225° C. in the illustrated embodiment.

This angle θ is determined by the displacement of the gas burner 7, etc., and part of the combustion gas flows circumferentially from a position past the upper end 4a in the direction of arrow 13, and the remainder of the combustion gas flows toward the upper end. The kinetic energy of the combustion gas at the upper end 4a and the pressure loss of the combustion gas paths in the directions of arrows 13 and 14 are taken into consideration so that it can flow in the direction 14 opposite to arrow 13 above 4a. shall be determined.

The furnace body 1 has a casing 20 made of steel plate forming its outer wall.
and a furnace material 19 provided on the inner peripheral surface of the casing.

The furnace material 19 is a lightweight heat insulating material made of inorganic fibers,
For example, Kao Wool (trade name) 21 and Monofelt (trade name) 22 are arranged in order from the radial direction of the furnace body 1 outward.

As clearly shown in FIG. 5, a wire mesh 17 is provided on the inner circumferential surface of the furnace material 19 over the entire length in the circumferential direction.

The wire mesh 17 is fixed by stud bolts 18 fixed to the casing 20 and holds the furnace material 19.

According to such a structure, the furnace material 19 is connected to the stud bolt 1
Compared to the conventional structure in which the furnace material 19 is held by only bolts 8, a relatively small number of stud bolts 18 are required over a wide holding area of the furnace material 19, and manufacturing costs can be reduced.

The exhaust hole 12 is formed in line with the axis of the gas burner 7.

That is, the burner 7 and the exhaust hole 12 are provided facing one side of the furnace body 1.

In other words, the burner 7 and the exhaust hole 12 are present in the projected plane on one side of the furnace body 1.

Therefore, it is possible to eliminate dead space at the installation location of the liquid heating device.

Moreover, the installation work of the liquid heating device becomes easy.

Instead of the gas burner 7, a burner using liquid fuel may be used.

According to experiments by the inventor of the present invention, the thermal efficiency of the conventional dyeing kettle was approximately 16%, but the thermal efficiency of the present liquid heating device using the gas burner 7 was approximately 60%.

As described above, according to the present invention, the following effects are achieved.

(1) Since the furnace material is supported by wire mesh, it can be supported with a relatively small number of stud bolts, etc. compared to conventional structures, and the number of parts is reduced.

(2) Since the combustion gas passage is made larger as it goes upward, the combustion gas, which has a relatively low temperature, flows through at a relatively low speed, and the contact time with the outer circumferential surface of the liquid tank increases. thermal efficiency is improved.

(3) The upper end portion 4a of the guide member 4 is disposed at a position spaced apart from each other in the circumferential direction along the flow direction of combustion gas from the exhaust hole and spaced downward from the flange 6.

Therefore, even if the exhaust hole 12 is located at any position in the circumferential direction of the furnace body 1, regardless of the position of the upper end 4a of the guide member 4,
The combustion gas will be guided to the exhaust hole 12 without stagnation.

That is, the combustion gas can flow over the entire circumference of the upper outer peripheral surface of the liquid tank.

Therefore, the outer circumferential surface of the liquid tank and the combustion gas come into sufficient contact.

This prevents the generation of dead spaces through which combustion gas does not flow, prevents a decrease in thermal efficiency, and improves the overall thermal efficiency.

(4) The heat transfer area of the outer peripheral surface of the liquid tank is increased by the guide member, which also improves thermal efficiency.

(5) Since the burner is installed so as to inject combustion gas tangentially along the winding direction of the guide member at a position corresponding to the lower end of the guide member, the combustion gas flows almost once around the bottom of the heating chamber. The combustion gas is guided to the combustion gas passage, and the bottom of the liquid tank is heated almost uniformly.

(6) A recess with an inclined part extending upward in the direction away from the burner is formed at the bottom of the heating chamber, so that the heating state of the bottom of the liquid tank by the combustion flame and combustion gas from the burner is almost uniform. be able to.

(7) The burner 7 and the exhaust hole 12 are arranged side by side so as to face one side of the furnace body.

That is, as shown in FIG. 3, the burner 7 and the exhaust hole 12 are
They are lined up in positions where they can be seen at the same time when the furnace body 1 is viewed from one side.

In other words, the burner 7 and the exhaust hole 12 are present in the projected plane on one side of the furnace body 1 .

This makes it possible to reduce the dead space at the installation location of the liquid heating device, and
Installation work can be done easily.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of one embodiment of the present invention, Fig. 2 is a plan view showing a partial cross section thereof, Fig. 3 is a left side view of the embodiment shown in Figs. 1 and 2, and Fig. 4. 5 is a developed view in the circumferential direction of a portion of the liquid tank 3 located inside the heating chamber 2, and FIG. 5 is an enlarged sectional view of the furnace body 1. 1...Furnace body, 2...Heating chamber, 3...
...Liquid tank, 4...Guide member, 5...
Combustion gas passage, 7... Gas burner, 8...
... Heating chamber population 8.12 ... Exhaust hole, 17 ...
... Wire mesh, 18 ... Stud bolt, 19
...Furnace material, 20...Casing.

Claims (1)

[Scope of utility model registration request] The periphery of the furnace body is lined with furnace material held by a wire mesh to form a heating chamber with a circular horizontal cross section, and the heating chamber has a bottomed cylindrical shape equipped with a flange to be placed on the upper part of the furnace body. The liquid tanks are installed concentrically, and a spiral guide member is provided on the outer circumferential surface of the liquid tank so that the pitch between the two becomes larger as it goes upward, and a spiral guide member is provided between the outer circumferential surface of the liquid tank and the circumferential surface of the heating chamber. A spiral combustion gas passage is formed in the space, and combustion gas is injected tangentially into the heating chamber along the winding direction of the guide member at a position corresponding to the lower end of the guide member in the lower part of the furnace body. A burner is provided at the bottom of the heating chamber where the burner faces, forming a recess with an inclined part extending upward in a direction away from the burner, and the upper side of the furnace body is provided with a recess where the combustion gas flows. An exhaust hole communicating with the passage is provided facing one side of the furnace body along with the burner, and the upper end of the guide member is spaced from the exhaust hole in the circumferential direction along the flow direction of combustion gas and downward from the flange. A liquid heating device characterized by being arranged at spaced positions.