JPH0229408Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is a method for exchanging heat of high-temperature combustion gas such as waste tires burned in a cylindrical combustion furnace surrounded by a jacket, and then removing dust. This invention relates to an improvement of a hot water boiler that burns waste tires, etc., and can generate hot water by discharging it into a chimney.

[Prior art] The structure of the combustion chamber in a hot water boiler that burns waste tires, etc.
As shown in Japanese Patent No. 49-8070, etc., it has a cylindrical shape, and its inner wall is flat from the bottom to the top.

Further, the hot water boiler described in Japanese Utility Model Application Publication No. 54-3650 is formed so that the longitudinal cross-section has a waveform curve in order to increase the strength of the inner shell.

Furthermore, in the incinerator described in Japanese Patent Application Laid-Open No. 54-69265, spiral grooves are provided on the inner wall of the combustion chamber to improve air circulation during combustion.

Next, the garbage incinerator described in Japanese Utility Model Publication No. 30-16768 has protruding wall surfaces and recessed wall surfaces arranged vertically in alternating rows in order to improve ventilation within the furnace.

[Problems that the invention attempts to solve] Conventional Utility Model Publication No. 1978-26784, Utility Model Publication No. 1977-
In the combustion chamber shown in Publication No. 8070, etc., the combustion chamber wall is formed in a flat and cylindrical shape, so that the flame inside the combustion chamber rises simply and linearly along the inner wall, which reduces the heat exchange efficiency. At the same time, the soot and dust continued to rise, making it difficult to dispose of the soot and dust.

Also, Utility Model Publication No. 54-3650, Japanese Patent Application Publication No. 54-69265
The items described in Publication No. 16768 and Utility Model Publication No. 16768 are as follows:
In order to increase the strength of the inner shell, the longitudinal section is formed with a wave-shaped curve, or the inner wall of the combustion chamber is provided with spiral grooves to improve the circulation of air during combustion, or In order to improve ventilation, protruding walls and recessed walls are arranged vertically in alternating rows, but in both cases, the residence time of the flame in the furnace is increased,
Moreover, there were difficulties in rotating the flame within the furnace to promote complete combustion and improve the heat transfer effect.

Further, there were also difficulties in stirring and rotating the water in the water supply chamber, and there were problems in equalizing heat absorption and increasing the heat exchange rate.

Further, there were problems in that the soot and dust contained in the flames could not be completely removed.

Furthermore, there was a serious problem in that the furnace did not have control functions such as keeping the temperature in the furnace constant, ensuring complete combustion, and preventing the generation of black smoke.

[Summary of the invention] This invention was made to solve the above problems, and it increases the residence time of the flame in the furnace, and also aims at the rotation of the flame in the furnace to achieve complete combustion. In addition to increasing the heat transfer effect, it also improves the stirring and rotation of water in the water supply chamber, equalizes heat absorption, increases the heat exchange rate, and completely removes the soot and dust contained in the flame. purpose.

In addition, this invention always maintains the temperature inside the furnace constant,
Another purpose is to achieve complete combustion and prevent the generation of black smoke.

[Means for Solving the Problems] The present invention employs the following means to solve the above problems.

A cylindrical combustion furnace 1 is composed of a combustion chamber 2, a water supply chamber 3, and an air supply chamber 4, and a plurality of protrusions 6 having a U-shaped cross section are arranged in a parallel or spiral shape on the entire surface of the inner wall 5 of the combustion chamber 2. The inner wall 5 of the combustion chamber 2 and the inner wall of the water supply chamber 3 are formed in an uneven shape, and the water supply chamber 3 is formed on the outside of the convex strip 6 having a U-shaped cross section. 2 side is formed so as to protrude into the combustion chamber 2, and the inner wall 5 of the combustion chamber 2 is provided with an acute-angled protrusion 7 at one or several places in the vertical direction, and this acute-angle protrusion 7 It is formed from the lower end of the inner wall 5 to the lower end of the fuel inlet 14 and is formed integrally with the inner wall 5, and the inside of this acute angled protrusion 7 communicates with the water supply chamber 3 and distributes water to the water supply chamber 3. A primary air supply section 8 is provided in the combustion furnace 1 to freely supply the compressed air from the blower 10 to the air supply chamber 4, and an air chamber 18 is provided to supply the compressed air from the blower 15 to the secondary air supply chamber 4. The air can be freely supplied to the air supply chamber 4 through the air supply section 9 and the tertiary air supply section 19, and the supply nozzle 22 is installed in the tangential direction of the combustion chamber 2 to communicate the air supply chamber 4 and the combustion chamber 2. Then, a compressor 11 is installed,
Opening/closing of input port 14 and air valves 16, 17, 20 of supply parts 8, 9, 19 or solenoid valves 12, 1
3 and 21 can be freely opened and closed, the supply of air in the furnace can be controlled, and the temperature in the furnace can be maintained at a substantially constant level.

[Function] With the above configuration, the present invention has a plurality of parallel or spiral U-shaped ridges 6 in cross section formed on the inner wall 5 of the combustion chamber 2. The flames do not rise linearly, but instead collide with the convex strips 6 that have a U-shaped cross section, and the rising speed is sequentially suppressed, and the residence time in the furnace becomes longer, promoting complete combustion of the flames and improving heat transfer. Increased effectiveness.

At the same time, since the inner wall 5 is formed in an uneven shape, the heat transfer area to the water supply chamber 5 is dramatically expanded, and as a result, the heat transfer effect is enhanced.

In addition, primary, secondary and tertiary air supply nozzles 22
is provided in the tangential direction of the combustion chamber 2, so
The flames rotate in the furnace and easily enter the recesses of the convex strips 6 having a U-shaped cross section, thereby suppressing the rising speed and at the same time enhancing the heat transfer effect.

Next, since the water supply chamber 3 is also formed in an uneven shape, the water is well stirred or rotated in the water supply chamber 3 and gradually rises. As a result, heat is evenly absorbed and the heat exchange efficiency is increased.

Furthermore, since the inner wall 5 of the combustion chamber 2 is provided with an acute-angled protrusion 7 in the vertical direction, the flame that rotates and rises always collides with this acute-angled protrusion 7. The included soot and dust easily falls downward.

As the flame collides with the sharp protrusion 7 in this way, the rising speed of the flame is suppressed, the residence time in the furnace becomes longer, the heat exchange efficiency increases, and at the same time all combustible materials are completely combusted. Furthermore, the soot dust contained in the flame collides with the sharp protrusion 7 and falls, and the soot dust accumulates on the bottom of the furnace and at the same time passes through the feed nozzle 2.
Since air is sent intensively from 2, it burns again.

Therefore, since the soot and dust are not discharged from the chimney 23, it is not necessary to install a dust collector to treat the soot and dust, and at the same time, the soot and dust does not rise to the vicinity of the fuel input port 14 provided in the middle of the combustion furnace 1.
Inserting fuel is easy, and it is possible to prevent soot and dust from being emitted when adding fuel.

The supply parts 8, 9, 19 include air valves 16,
Since the air valves 17, 20 or the solenoid valves 12, 13, 21 are provided, when the exhaust temperature reaches a predetermined temperature, the air valves 16, 17, 20 or the solenoid valve 1
2, 13, and 21 are closed, restricting the air supply and suppressing the generation of gas, keeping the temperature in the furnace almost constant, and at the same time, performing complete combustion and preventing the generation of black smoke.

Next, when the exhaust temperature decreases, air valve 1
6, 17, 20 or solenoid valves 12, 13, 21 open, supply air to promote gas generation, maintain the temperature inside the furnace almost constant, and at the same time perform complete combustion to prevent the generation of black smoke. do.

By repeating the above control operations, complete combustion is always carried out in the furnace under the best conditions.

Further, when the temperature inside the furnace no longer rises above a certain temperature, the compressor 11 is activated and the charging port 14 is opened, and a tire loading machine (not shown) etc.
This replenishes fuel for tires, etc.

[Example] To explain the present invention in detail based on an example of implementation shown in the drawings, a cylindrical combustion furnace 1 includes a combustion chamber 2,
The combustion chamber 2 is composed of a water supply chamber 3 and an air supply chamber 4, and a plurality of protrusions 6 having a U-shaped cross section are formed in parallel or in a spiral shape on the entire surface of the inner wall 5 of the combustion chamber 2. The inner wall of the chamber 3 has an uneven shape.

The protruding portion 6 having a U-shaped cross section communicates with the water supply chamber 3 , and a portion of the water supply chamber 3 on the combustion chamber side is formed to protrude into the combustion chamber 2 .

An acute-angled protrusion 7 is vertically provided on the inner wall 5 of the combustion chamber 2.
is formed from the lower end of the inner wall 5 to the lower end of the fuel inlet 14 and is integrally formed with the inner wall 5, and the inside of this acute angled protrusion 7 is connected to the water supply chamber 3.
Water is provided throughout.

The sharp protruding portion 7 is not limited to one location, but may be provided at several locations. A feed nozzle 22 is installed at the lower end of the acute-angled protrusion 7.

8 is a primary air supply section, which communicates the blower 10 and the air supply chamber 4. Reference numeral 18 denotes an air chamber, which supplies the compressed air from the blower 15 to the air supply chamber 4 via the secondary air supply section 9 and the tertiary air supply section 19.
is being sent to.

11 is a compressor, which opens and closes the inlet 14 and air valves 16,
17, 20 or solenoid valves 12, 13, 21 are opened and closed.

The supply parts 8, 9, 19 are provided with an air valve 1.
6, 17, 20 or solenoid valves 12, 13, 21 are provided, and when the exhaust temperature reaches a predetermined temperature (for example, 350°C to 400°C), the air valves 16, 1
7, 20 or solenoid valves 12, 13, 21 close, restricting the air supply and suppressing gas generation, keeping the temperature in the furnace almost constant and at the same time performing complete combustion to prevent the generation of black smoke. .

Then, the exhaust temperature decreases (e.g. below 350℃)
Then, the air valves 16, 17, 20 or the solenoid valves 12, 13, 21 open, supplying air to promote gas generation, maintain the temperature in the furnace almost constant, and at the same time perform complete combustion, producing black smoke. Prevent occurrence.

By repeating the above control operations, complete combustion is always carried out in the furnace under the best conditions.

Additionally, if the furnace temperature no longer rises above a predetermined temperature (for example, 250°C or higher), the compressor 1
1 is operated to open the charging port 14, and a tire loading machine or the like (not shown) replenishes the tires with fuel.

In the figure, 23 is a chimney, 24 is a steam drum,
25 is a hot water outlet, 26 is a steam outlet pipe, 2
7 is an ash removal outlet.

[Effect of the invention] Therefore, according to the invention, the inner walls of the combustion chamber and the water supply chamber are provided with convex stripes and are formed in an uneven shape, so that the heat transfer area is expanded and the rising speed of the flame is reduced. is effectively suppressed, thereby increasing the heat transfer effect and increasing the heat exchange efficiency.

At the same time, the water in the water supply chamber collides with the protrusions and rotates, and is well stirred, so that heat absorption is promoted more evenly and effectively.

Next, because the sharp ridges are vertically provided on the inner wall of the combustion chamber, the flame rotates and rises while colliding with the sharp ridges.
The effect is similar to that of running the dust collector over and over again, and the unburned materials such as soot contained in the flames collide with these sharp ridges and easily fall downward.
Deposits at the bottom of the furnace.

Therefore, no soot and dust is emitted from the flue, and there is no need to install a dust collector or the like as in the past, which allows cost reduction and at the same time allows the combustion furnace to be made smaller.

In addition, since unburned residue such as soot and dust also falls midway into the furnace, it is combusted again while it is falling, and complete combustion can be achieved.

Furthermore, as the flame collides with the sharp ridges, the rising speed of the flame is suppressed, the residence time in the furnace becomes longer, the heat exchange efficiency increases, and at the same time the combustion of combustibles is further promoted. be.

Furthermore, since the soot and dust fall in the middle of the furnace, the soot and dust do not rise to the vicinity of the fuel inlet, making fuel replenishment easy and there is no risk of it being discharged from the inlet.

In addition, unburned materials such as soot and dust collide with the sharp ridges and are guided downward, that is, to a predetermined location on the bottom of the furnace where the temperature is highest in the furnace (lower end of the acute ridges), and the Further air is sent through the feeding nozzle, which combusts the ash again to form a complete ash. Therefore, unburned substances such as soot and dust are completely combusted, combustion efficiency is increased, and at the same time, soot does not adhere to the inside of the furnace, so there is no need to clean the inside of the furnace.

Furthermore, the inside of the sharp protruding part leads to the water supply chamber,
Because it is filled with water, it is constantly cooled and can withstand long-term use.

Furthermore, since the air supply section is provided with an air valve or a solenoid valve, when the exhaust temperature reaches a predetermined temperature, the air valve or solenoid valve closes.
By restricting the air supply, gas generation can be suppressed, and the temperature inside the furnace can be maintained at a substantially constant level, while complete combustion can be carried out, thereby preventing the generation of black smoke.

In addition, when the exhaust temperature drops, the air valve or solenoid valve opens to supply air to promote gas generation, maintain the furnace temperature at a nearly constant level, and at the same time perform complete combustion to prevent the generation of black smoke. be able to.

By repeating the above control operations, complete combustion can always be carried out in the furnace under the best conditions.

Further, when the temperature inside the furnace no longer rises above a certain temperature, the compressor is activated and the charging port is opened, so that tires, etc. can be automatically refilled with fuel using a tire charging machine or the like.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the present invention, and FIG. 1 is a front view of the present invention, and FIG. 2 is a cross-sectional view of the same. 1... Combustion furnace, 2... Combustion chamber, 3... Water supply room,
4... Air supply chamber, 5... Inner wall, 6... Convex ridge portion having a U-shaped cross section, 7... Acute angled protrusion portion.

Claims (1)

[Scope of utility model registration request] A cylindrical combustion furnace 1 is composed of a combustion chamber 2, a water supply chamber 3, and an air supply chamber 4, and a plurality of protrusions 6 having a U-shaped cross section are arranged in a parallel or spiral shape on the entire surface of the inner wall 5 of the combustion chamber 2. The inner wall 5 of the combustion chamber 2 and the inner wall of the water supply chamber 3 are formed in an uneven shape, and the water supply chamber 3 is formed on the outside of the convex strip 6 having a U-shaped cross section. 2 side is formed so as to protrude into the combustion chamber 2, and the inner wall 5 of the combustion chamber 2 is provided with an acute-angled protrusion 7 at one or several places in the vertical direction, and this acute-angle protrusion 7 It is formed from the lower end of the inner wall 5 to the lower end of the fuel inlet 14 and is formed integrally with the inner wall 5, and the inside of this acute angled protrusion 7 communicates with the water supply chamber 3 and distributes water to the water supply chamber 3. A primary air supply section 8 is provided in the combustion furnace 1 to freely supply the compressed air from the blower 10 to the air supply chamber 4, and an air chamber 18 is provided to supply the compressed air from the blower 15 to the secondary air supply chamber 4. The air can be freely supplied to the air supply chamber 4 through the air supply section 9 and the tertiary air supply section 19, and the supply nozzle 22 is installed in the tangential direction of the combustion chamber 2 to communicate the air supply chamber 4 and the combustion chamber 2. Then, a compressor 11 is installed,
Opening/closing of input port 14 and air valves 16, 17, 20 of supply parts 8, 9, 19 or solenoid valves 12, 1
3. A waste tire combustion hot water boiler characterized by being able to freely open and close the boilers 3 and 21, controlling the supply of air in the furnace, and maintaining the temperature in the furnace almost constant.