WO2024177580A1

WO2024177580A1 - Kiln for providing heat to the boiler

Info

Publication number: WO2024177580A1
Application number: PCT/TH2024/050007
Authority: WO
Inventors: Wanchai WONGSANGANAN
Original assignee: Individual
Current assignee: Individual
Priority date: 2023-02-20
Filing date: 2024-02-15
Publication date: 2024-08-29
Anticipated expiration: 2025-08-20

Abstract

A kiln for providing heat to the boiler, according to this invention, is developed to conduct heat coming from a kiln for continual heat usage which could be used to heat a steam boiler, a hot-water oven or an oil oven. Consequently, the residual heat from the burning of charcoal or the incineration of waste will be utilized. The aforementioned kiln comprises furnaces and/or burners to deliver heat through a heating pipe to a boiler. The heating pipe incorporates on-off valves controlling the heat before it flows into the heating pipe from the furnaces and into the boiler. It thus serves as a means of preventing any backflow of the heat or hot air to the heating pipe.

Description

KILN FOR PROVIDING HEAT TO THE BOILER

Field of the Invention

Engineering relating to a kiln for heating a boiler.

Background of the Invention

Kilns take on numerous configurations according to their applications. Those in typical usage may rely on dried straw branches as a fuel for heating purposes, and then, it was developed further by providing with a firewall surrounding the kiln. In this type of kiln, the fuel is placed at the bottom level in order to provide the upward-convection heat. A kiln of this type is termed an updraft kiln. Kilns are categorized according to the types of fuel they use, as for example, oil kilns, gas kilns, electric kilns and firewood kilns. The operation of such kilns may involve intermittent, semi-continuous or continuous burning.

In an intermittent kiln, the burning takes place on an interim basis, but not continually. It requires a sufficiently long length of time for the kiln to cool down. Products are then reloaded into the kiln. A kiln of this type is thus suitable for small-quantity heating. For the most part, kilns of this type have the features of a single-type kiln and are favored for medium and small- size industrial use. The working process consists of placing the products into the kiln and starting the heating process to the saturation point and then extinguishing the fire. After that, the products are cooled down and then removed from the kiln. In the use of a semi-continuous kiln, the kiln heats almost continuously. It saves fuel by relying on the heat coming from one part of the kiln by using it in an alternating recycled heating sequence. In the use of a continuous kiln, the kiln will usually be in the form of a tunnel kiln or a ring kiln, which has been designed to bum continuously at all times and is suitable for high- volume heating. Because it heats continuously, it can be conveniently operated. It saves fuel and is capable of heating materials and products at a variety of temperatures. It mainly meets only singular objectives and generally results in a waste and total loss of any fuel and heat left over from the burning process. After conducting a search, it has been found some of inventions filed for a protection which contain similar subject matter to the present invention indicated as follows:

A Thai petty patent application number 0103000038, with an invention title “Garbage Kiln,” referred to heretofore as the garbage kiln, consists of a double tank, with one tank as the kiln tank with a compressed-air chamber perforated to admit air into the burning chamber and the

SUBSTITUTE SHEET (RULE 26) other tank collecting the ashes, and a blower; the garbage kiln functions by blowing oxygen into the burning chamber without the use of fuel in the burning process.

A Thai petty patent application number 0903001498, with an invention title “Cooking-Gas Charcoal Kiln”, referred to heretofore as the cooking-gas charcoal kiln, consists of an inner structure and a steel outer structure; between the steel inner and outer structures, there is a gap for a steel pipe connected to the steel inner structure venting soot and smoke interspersed between the insulation and heat. The soot and smoke flow out through the air vents, which can be closed to control the air movement. There is a top-side aperture allowing the insertion of wood fuel and the removal of ash from the cooking-gas charcoal kiln joined to the inner steel structure. There is a top-side cover, a top-side vent and a space for placing a gas-spray nozzle, which is a space for the installation of the gas-spray nozzle, which is connected to the inner steel structure.

A Thai petty patent application number 1103000359, with an invention title “High- Efficiency Burning Cylindrical Small-Size Air-Controlled Waste Kiln,” referred to heretofore as the cylindrical waste kiln, consists of two upper and lower components connected together with a door for the insertion of waste designed to function interactively with a steel spindle and a weighted pendulum to create balance in the opening and closing of the door. It has a door for the removal of ash from the kiln, which was designed with a vent for the passage of air into the kiln and an air-pressure adjustment plate, together with an incoming air pressure adjustment arm. There is also a garbage-compartment door on the grating and an air circulation control box to form a control system to generate the circulation of hot air within the kiln. It results in a high-efficiency incineration system with complete incineration.

A Thai petty patent application number 1303001117, with an invention title “The Kiln,” referred to heretofore as the kiln, consists of a raw-material support base which supports the packing-in of the raw materials from the outside that need to be incinerated for their passage into the raw-materials chamber, wherein the raw materials that need to be incinerated are taken in at the top so that they may then flow downward to the bottom in order to pressure-feed the raw materials to be incinerated into the interior of the incineration chamber at its lower end. The purpose is to incinerate them into a gas which will pass through an inner divider positioned between the raw-materials entry chamber and the incineration chamber. The gas then passes into the upper side of the raw-materials entry chamber prior to being sent into circulation chamber,

SUBSTITUTE SHEET (RULE 26) where any impurities that may be contained within the gas are separated out before reaching a component that supports any continued use of the gas.

A Thai patent application number 1801008051, with an invention title “Refuse Incineration Plant and Factory Refuse Incineration Control Method”, referred to heretofore as the refuse incineration plant, consists of a kiln which has been set up with a burner head for incinerating waste that has been dried out in a drying oven, a boiler which has been set up to create steam by use of heat generated by the incineration of waste, a waste feeder which has been set up for the purpose of feeding the waste into the kiln drying oven, a gas meter which has been set up to gage the properties of the kiln gas generated in the drier, and a controller which has been set up to compute an appropriate deposition for the generation of heat that would meet expectations from the incineration of waste in the drying oven. The resulting heat would be based on the attributes of the kiln gas determined from the gas meter and the waste feed control, so that the amount of waste deposits coming from the drying oven would then be suitable.

As mentioned above, it was found that the components and functioning mechanisms of the prior inventions pertaining to the kiln previously described differed on the basis of operational suitability. However, limitations were also found in the application of the components drawing the heat from the incineration and the delivery of the heat for actual use at a maximum level of efficiency. The inventor had developed the kiln to generate hot- water boiler heat, a hot-water oven and an oil oven, which would conduct away and make maximum use of any residual heat remaining from the incineration process.

Summary of the Invention

The kiln for providing heat to the boiler, which was developed to draw heat from the kiln, operates continuously and could provide heat to the steam boiler, the hot-water oven or the oil oven. It conducts away the residual heat remaining from the incineration of the ash or incineration of waste and makes practical use of it. The said kiln is composed of furnaces and/or an internal burner to distribute heat through a pipe to heat the boiler. The heating pipe is outfitted with on-off valves to control the passage of the heat before it flows into the heating pipe from the kiln and into the boiler. Its purpose is to prevent any backflow of the heat or hot air to the heating pipe.

The objective of this invention is to deliver unused heat coming from kilns and put it to use in heating steam boilers, hot- water ovens and oil ovens as a means of reducing total fuel

SUBSTITUTE SHEET (RULE 26) consumption and the amount of time involved, and to stabilize the temperature of the entire working process with continuity.

Brief Description of the Drawings

Figure 1 illustrates an embodiment of the kiln used to heat a boiler.

Detailed Description of the Invention

According to Figure 1, showing an embodiment of a kiln being used to heat a boiler, the aforementioned kiln comprises two or more furnaces and/or burners (10) integrated together to provide heat to a boiler (50) through a heating pipe (40) containing one or more pipe branches (20) delivering heat to the boiler (50), to the hot-water ovens and to the oil ovens; wherein the furnaces and/or burners (10) comprise a fuel-intake section and a product output section; wherein the furnaces and/or burners (10) can be selected from any one of waste kilns, ash kilns, gasifiers, gas-burning nozzles, oil-burning nozzles or other burners, or combination thereof.

The heating pipe (40) is made from a material with great durability at both high and low temperatures, wherein the heating pipe (40) was designed to withstand the heat coming from two or more furnaces and/or burners (10), with pipe branches (20) consisting of at least one branch to withstand the heat from any of the furnaces and/or burners, or combination thereof. The heat is then delivered to the boiler (50) and/or hot-water oven and/or oil oven; wherein the heating pipe (40) further comprises an on-off valves (30) to control the inflow of heat before going through the heating pipe (40), including to maintain the heat from the furnaces and/or burners (10) in the boiler (50) and/or the hot-water oven and/or the oil oven; it thus serves as a means of preventing any backflow of the heat or hot air at the pipe branches (20) of the heating pipe (40); wherein the heating pipe (40) is provided to be cooled by the circulation of water and/or cold air in order to prevent the heating pipe (40) from becoming overheated.

At least, two or more of furnaces and/or burners (10) operate in conjunction with the heating pipe (40) in order to deliver heat to the boiler. It is an efficient heating process that can be used in supplying heat for the purpose of transferring it as heat energy for further use. It thus helps

SUBSTITUTE SHEET (RULE 26) to reduce the time needed to reach the boiling point and to maintain a constant temperature over longer periods of time. Also, reducing or increasing the temperature by this method helps to maintain and to limit damage to the equipment and tools very effectively; wherein the furnaces and/or burners (10) can be selected from any one of waste kilns, ash kilns, gasifiers, gas-burning nozzles, oil-burning nozzles or other burners, or combination thereof.

Best Mode of the Invention

As described in the Detailed Description of the Invention section.

SUBSTITUTE SHEET (RULE 26)

Claims

1. A kiln for providing heat to the boiler comprising at least two or more of furnaces and/or burners (10) jointly supplying heat to a boiler (50) through a heating pipe (40); wherein it is characterized in that the heating pipe (40) is provided with a branch pipe (20) at least one branch as a means of delivering heat to the boiler (50), the hot-water oven and the oil oven; wherein the heating pipe (40) has been designed to withstand the heat coming from two or more furnaces and/or burners (10), with the branch pipes (20) at least one branch, in order to deliver heat from any of the furnaces and/or burners (10), or combination thereof, to the boiler (50) and/or the hot-water oven and/or the oil oven.

2. The kiln for providing heat to the boiler according to claim 1, wherein the furnaces and/or burners (10) comprise a fuel-intake section and a product-output section.

3. The kiln for providing heat to the boiler according to claim 1, wherein the furnaces and/or burners (10) can be selected from any one of waste kilns, charcoal kilns, gasifiers, gas-burning nozzles, oil-burning nozzles or other burners, or combination thereof.

4. The kiln for providing heat to the boiler according to claim 1, wherein the heating pipe (40) is made from a material of good durability at both high and low temperatures.

5. The kiln for providing heat to the boiler according to claim 1, wherein the heating pipe (40) further comrpises on-off valves (30) to control the passage of the heat before it flows into the heating pipe (40) as it maintains the heat coming from the furnaces and/or burner (10) to prevents any backflow of the heat or hot air at the branch pipes (20) .

6. The kiln for providing heat to the boiler according to claim 1, wherein the heating pipe (40) has been designed to be cooled by a circulation of water and/or cold air in order to prevent the heating pipe (40) from becoming overheated.

SUBSTITUTE SHEET (RULE 26)