Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
A technology of porous ceramics and combustion plates, applied to burners, burners, combustion methods, etc., can solve the problems of many flames leaving the surface of the combustion plate, low conversion rate of infrared rays, and low temperature of the combustion plate, so as to improve combustion stability and Effects of flame speed, widening combustion limit range, and reducing emission concentration
Inactive Publication Date: 2018-12-07
SHENZHEN YUANJIANG SCI & TECH CO LTD
View PDF3 Cites 6 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
[0002] At present, the combustion bodies of civil and industrial infrared burners mainly include ceramic combustion plates, metal corrugated plates, metal fiber braids, etc. Among them, ceramic combustion plates are widely used because of their low cost and good thermal stability. The honeycomb structure with constant and very small pore spacing, in order to be compatible with different gas species, such as liquefied gas and natural gas, its pore size should be smaller than the minimum quenching distance of each gas type in the ceramic body, and because the pore size is the same on the gas inlet and outlet surfaces , in the environment where the air is supplied by active wind pressure, the pressure of the mixed gas is high, which will lead to a faster airflow speed in most cases, more flames detached from the surface of the combustion plate, and the temperature of the combustion plate is not high, which will affect the preheating effect of the intake air. Not good, the combustion temperature is relatively low, the infrared conversion rate is low, and more pollutants are generated. At the same time, it is not easy to form stable combustion in the case of lean combustion. When there is no secondary air supply, such as in a sealed combustion environment, it is required Strict requirements are placed on the ratio of gas to air
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more
Image
Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0010] Embodiment one: figure 1 The ceramic combustion plate is composed of dense circular through holes, the diameter of the air inlet surface is about 1mm, and after keeping the diameter of the hole at a depth of 8mm, it begins to expand symmetrically in a V shape at an angle of 90°, to a diameter of about 1.6mm, and the minimum hole spacing is about 2.0mm , uniformly densely distributed. This combustion board is suitable for liquefied petroleum gas and natural gas, but not for coke oven gas and water gas.
[0011] Refer to the quenching distance of various gases as follows:
[0012] At room temperature (20°C)
[0013] Type of gas
[0014] Effect of temperature on quenching distance (natural gas)
[0015] Fire hole surface temperature
[0016] Since the intake air temperature is generally low, even if the mixture has been preheated, it is generally recommended not to exceed 300 °C, otherwise cold flame combustion may occur. At this time, the inlet ape...
Embodiment 2
[0017] Embodiment two: figure 2 The ceramic combustion plate is composed of dense square through holes. The side length of the air intake surface is about 1*1mm, and the diameter of the hole is maintained at a depth of 8mm. The distance is about 2.0mm, evenly and densely distributed, and the catalyst composed of cerium oxide is evenly coated on the surface of the inner hole enlarged by the arc. This combustion board is suitable for liquefied petroleum gas and natural gas, but not for coke oven gas and water gas.
[0018] The combustion heating principle of this scheme is basically similar to scheme 1, the difference is that since the enlarged surface of the circular arc is coated with a catalyst, the combustion process can be made faster and the infrared conversion efficiency is higher, of course, the cost will also be higher.
[0019] The advantage of this scheme is that the porosity of the combustion plate is high, the air flow rate is large, and it has a catalytic effect,...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
PUM
Property
Measurement
Unit
diameter
aaaaa
aaaaa
Login to view more
Abstract
The invention discloses a variable-hole-diameter porous ceramic burning plate. A plurality of small holes are evenly and densely distributed in the gas inlet face of the variable-hole-diameter porousceramic burning plate, the diameter of the holes in the gas inlet face is less than the hole diameter of the gas outlet face, the hole sections can be in various shapes, the hole diameter going deep into a certain thickness range of the burning plate is invariant, then the hole diameter is gradually increased and can be increased in a V shape, a curved shape or a step shape, and all the holes penetrate through the burning plate vertically. The gas outlet face serves as a burning face. The hole diameter of the gas inlet face is less than the quenching distance required by wall surface quenchingof adopted fuel gas on a ceramic body, the hole diameter of the gas outlet face approaches to the quenching distance during quenching, and the minimum hole depth is greater than two times of the quenching distance. When various fuel gas is compatible, the gas inlet hole diameter is calculated in the minimum quenching distance, and the thickness is calculated in the maximum value. The hole diameter increasing area can be coated with a catalyst to promote rapider and more full burning, and the infrared conversion rate is increased. According to the variable-hole-diameter porous ceramic burningplate, burning stability can be improved, the flame speed can be increased, the burning ultimate range is expanded, and the pollutant discharging concentration is decreased.
Description
Technical field: [0001] The invention relates to a variable-aperture porous ceramic combustion plate, which belongs to the technical field of combustion. Background technique: [0002] At present, the combustion bodies of civil and industrial infrared burners mainly include ceramic combustion plates, metal corrugated plates, metal fiber braids, etc. Among them, ceramic combustion plates are widely used because of their low cost and good thermal stability. The honeycomb structure with constant and very small pore spacing, in order to be compatible with different gas species, such as liquefied gas and natural gas, its pore size should be smaller than the minimum quenching distance of each gas type in the ceramic body, and because the pore size is the same on the gas inlet and outlet surfaces , in the environment where the air is supplied by active wind pressure, the pressure of the mixed gas is high, which will lead to a faster airflow speed in most cases, more flames detached...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more
Application Information
Patent Timeline
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to view more