CN103206857B - Method for operating environment-friendly energy-saving de-waxing kiln - Google Patents

Abstract

The invention relates to the technical field of ceramic processing equipment, in particular to an operation method of a wax discharge kiln. An environment-friendly and energy-saving operation method for a wax discharge kiln. A heating device is used to remove wax from the ceramic parts in the sintering chamber of the wax discharge kiln. The plate undergoes secondary combustion, and the final exhaust gas has no peculiar smell, which avoids the rapid escape of suspended matter produced by incomplete combustion. Due to the adoption of the above-mentioned technical scheme, the present invention increases the gas consumption by only about 12 kg in the whole process of wax removal, which can significantly reduce the emission of harmful gases and suspended solids, reduce the pollution to the atmosphere, protect the environment and save energy, and the cost is much lower than that of Other domestic high-end and imported environmental protection kilns.

Description

An operating method of an environmental protection and energy saving wax discharge kiln

technical field

The invention relates to the technical field of ceramic processing equipment, in particular to an operation method of a wax discharge kiln.

Background technique

The wax discharge kiln is needed in the production process of modern ceramics. Its function is to discharge the paraffin and other binders in the ceramic injection process out of the ceramic parts, otherwise it will affect the subsequent firing process.

The tail gas produced by traditional wax removal kilns contains a large amount of unburned wax-containing suspended matter in the process of wax removal. When the temperature rises from 150°C to 600°C, the unburned wax is taken out of the wax discharge kiln together with the burned gas, and the discharge of such substances into the atmosphere will cause odor pollution and affect the environment.

Contents of the invention

The object of the present invention is to provide an operating method of an environmental protection and energy-saving wax discharge kiln to solve the above technical problems.

The technical problem solved by the present invention can adopt following technical scheme to realize:

An environment-friendly and energy-saving operation method for a wax discharge kiln, using a heating device to remove wax from the ceramic parts in the sintering chamber of the wax discharge kiln, and the discharged wax smoke is discharged to the outside through a flue exhaust duct, characterized in that, A fire spraying device and a heating plate are also provided, the injection port of the fire spraying device faces the heating plate, and the heating plate is provided with a thermocouple for measuring the temperature of the heating plate;

Use the following steps to remove wax:

1) Send the ceramic parts to be dewaxed into the sintering chamber, and close the kiln door;

2) Start the heating device to heat the sintering chamber;

3) When the temperature in the sintering chamber reaches above 150 degrees, start the flame spraying device to heat the heating plate, and the wax smoke discharged from the sintering chamber first passes through the injection port of the flame spraying device, then passes through the heating plate, and then discharges to the outside ;

4) After the heating device works for about 20 minutes, the wax smoke will naturally burn when passing through the heating plate from the exhaust duct. At this time, the gas supply is controlled by the temperature of the heating plate fed back by the thermocouple installed at the heating plate, so as to adjust The size of the fire head of the flame-throwing device can achieve the purpose of fully burning the remaining suspended wax molecules in the flue gas;

5) When the sintering furnace reaches 650 degrees, turn off the flame injection device.

The present invention realizes the secondary combustion of wax in the wax removal process through the above operation steps, eliminates the peculiar smell generated in the wax removal process, and makes the wax removal process more thorough.

In the present invention, a fire-spraying device is installed in the flue exhaust duct to heat the area of the heating plate in the flue exhaust duct, and the suspended matter containing waxy molecules is burned twice by the heating plate and the fire-spraying device to make it fully burn and eliminate peculiar smell. In actual operation, when the sintering chamber reaches 130-180°C, the ceramic parts will produce a little wax smoke. Usually, the wax will be exhausted from the ceramic body when the wax discharge process is 200°C~600°C, but at this time the wax has not Burned into gas, but partially converted into suspended solids and discharged. Wax smoke escapes from the flue at 300°C. When passing through the vertical channel, it is heated by the flame spraying device and rises rapidly to the point where it has been The flame-throwing device is heated to about 650°C in the area of the heating plate. Due to the obstruction of the heating plate, the rising speed of the wax smoke is reduced, which makes the wax smoke spontaneously ignite due to high temperature, and drives the adjacent suspended matter to burn together, forming a A high temperature spontaneous combustion zone. After that, all the gas passing through this area will be filtered by high temperature so that the suspended matter in the gas is fully burned and then discharged through the chimney.

One end of the heating plate is provided with a stay wire, and the stay wire can control the lifting of the heating plate to adjust the displacement of the kiln.

The pull wire is preferably a metal pull wire.

The flame spraying device preferably adopts a musket, and the musket is supplied with gas through a gas pipeline.

The heating device preferably adopts a plurality of torches, which are evenly arranged at the bottom of the sintering chamber, and the plurality of torches are supplied with gas through a gas pipeline.

The heat-receiving plate is preferably made of a high-temperature-resistant steel plate with good heat transfer, and the injection port of the flame spraying device faces the plate surface of the heat-receiving plate.

The flame injection device and the heating device are connected to a control module, and the amount of flame injection is adjusted by adjusting the gas supply through the control module;

The thermocouple is connected to the control module.

The control module is connected with a temperature sensor, the temperature sensor is arranged in the sintering chamber or on the wall outside the sintering chamber, the temperature sensor is used to detect the temperature information in the sintering chamber, and the temperature The information is transmitted to the control module, and the control module controls the burner of the heating device according to the temperature information so as to adjust the temperature of the sintering chamber.

Beneficial effects: due to the adoption of the above-mentioned technical scheme, the present invention increases the gas consumption by only about 12 kg in the entire wax removal process, which can significantly reduce the emission of harmful gases and suspended solids, reduce the pollution to the atmosphere, protect the environment and save energy, and reduce the cost. Far lower than other domestic high-end and imported environmental protection kilns.

Description of drawings

Fig. 1 is the flow chart of operation steps of the present invention;

Fig. 2 is a structural schematic diagram of the wax discharge kiln of the present invention.

Detailed ways

In order to make the technical means, creative features, goals and effects achieved by the present invention easy to understand, the present invention will be further described below in conjunction with specific diagrams.

Referring to Fig. 1 and Fig. 2, an environment-friendly and energy-saving wax discharge kiln operation method includes a wax discharge kiln provided with a flame injection device 1 and a heating device 2, and a sintering chamber 3 is arranged in the wax discharge kiln, and the sintering chamber 3 is connected with a row of The flue, the flue is an L-shaped passage composed of a vertical passage 4 and a horizontal passage. The fire spraying device 1 is arranged in the vertical passage 4 of the flue, and a chimney 10 is arranged on the top of the vertical passage 4. The vertical passage 4 is also provided with a heating plate 5, the heating plate 5 is provided with a thermocouple, the heating plate 5 is provided with a backguy 6, and the backguy 6 protrudes from a backguy outlet 7 arranged on the side wall of the vertical channel 4, The flame spraying device 1 and the heating device 2 are supplied with gas through a gas pipeline 8, which includes the following steps:

1) Send the ceramic parts to be dewaxed into the sintering chamber 3, and close the kiln door 9;

2) Open the valve of the gas pipeline 8, adjust the angle of the heating plate 5 and fix the pull wire 6 on the outer wall of the wax discharge kiln to ensure that the chimney 10 is opened;

3) Start the heating device 2 to heat the sintering chamber 3;

4) When the temperature in the sintering chamber 3 reaches above 150°C, start the flame spraying device 1 to heat the heating plate 5;

5) After the heating device 2 works for 20 minutes, the ceramic parts start to discharge wax normally. At this time, the valve of the gas pipeline 8 needs to be adjusted to reduce the gas delivery volume of the flame spraying device so as to reduce the fire head of the flame spraying device 1 and avoid insufficient combustion. The resulting suspended matter escapes quickly;

6) When the temperature in the sintering chamber 3 reaches 650°C, the flame injection device 1 is turned off.

The present invention realizes the secondary combustion of the wax in the wax removal process through the above operation steps, eliminates the waxy smell generated in the wax removal process, and makes the wax removal process more thorough.

In the present invention, a fire-spraying device is installed in the flue exhaust duct to heat the heating plate in the flue exhaust duct. The heating plate and the fire-spraying device are used to carry out secondary combustion of the wax-containing suspended matter to make it burn fully and eliminate the waxy smell. The wax can be fully burned when the temperature is above 650°C. In actual work, when the sintering chamber reaches 130°C~180°C, the ceramic parts will produce a little wax smoke. However, at this time the wax does not burn out and turn into gas, but part of it is discharged in the form of suspended solids. The wax smoke escapes from the flue at 300 ° C. When passing through the vertical channel, it is discharged by the spray The fire device heats up and quickly rises to the heating plate area that has been heated to about 650°C by the flame spraying device. Due to the blockage of the heating plate, the rising speed of the wax smoke is reduced, which makes the wax smoke spontaneously ignite due to high temperature, and drives the adjacent The suspended matter burns together to form a high-temperature spontaneous combustion zone in the area of the heating plate, and the high temperature formed by the suspended matter can continue to heat the area of the heating plate to assist in providing heat for subsequent combustion. After that, all the gas passing through this area will be filtered by high temperature to fully burn the suspended matter in the gas to achieve a more complete wax removal effect, and the gas generated after combustion is fully discharged through the chimney.

Referring to FIG. 2 , the heating plate 5 adopts a high-temperature-resistant steel plate, and the injection port of the flame spraying device 1 faces the surface of the heating plate 5 . The stay wire 6 adopts a metal stay wire. The user can control the lifting height of the heating plate 5 by pulling the pull wire 6, and then control the flow rate in the upper and lower spaces of the heating plate 5. The greater the flow rate, the easier it is for the wax smoke to be discharged without being heated by the heating plate 5, and it cannot be fully burned; the pull wire 6 is lowered to the heating plate 5, resulting in poor convection, reduced oxygen intake, and unable to rise in temperature, which affects exhaust. Wax effect, so it is necessary to pull the cable according to the site conditions to achieve pollution-free wax discharge. The backguy outlet 7 is provided with a windshield 11 , the windshield 11 extends into the vertical channel 4 , and has a certain distance from the opposite side wall of the vertical channel 4 , and the windshield 11 is positioned above the heating plate 5 . The flame spraying device 1 and the heating device 2 are connected to a control module, and the size of the fire head is adjusted by adjusting the gas supply through the control module. The control module is connected with a temperature sensor, the temperature sensor is arranged in the sintering chamber 3, the temperature sensor is used to detect the temperature information in the sintering chamber 3, and transmits the temperature information to the control module, and the control module controls the size of the burner of the heating device 2 according to the temperature information In order to adjust the temperature of the sintering chamber 3 . The thermocouple is connected to the control module, so as to adjust the flame head of the flame spraying device 1 by referring to the temperature value fed back by the thermocouple.

The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above. Those skilled in the industry should understand that the present invention is not limited by the above-mentioned embodiments. What are described in the above-mentioned embodiments and the description only illustrate the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will also have Variations and improvements are possible, which fall within the scope of the claimed invention. The protection scope of the present invention is defined by the appended claims and their equivalents.

Claims (8)

1. an environmental protection and energy saving wax removal kiln method of operating, adopt heater to carry out paraffin removal processing to the ceramic member in the sintering chamber of wax removal kiln, the wax cigarette of discharging is discharged to outside by smokejack, it is characterized in that, in described smokejack, be also provided with a flame device and a heated sheet, the jet of described flame device is towards described heated sheet, and described heated sheet place is provided with for measuring the thermometric galvanic couple of heated sheet temperature;

Adopt following steps to carry out de-waxing:

1) ceramic member of wanting paraffin removal is sent in sintering chamber, closed wicket;

2) open the valve of gas pipeline, adjust the angle of heated sheet and bracing wire is fixed on wax removal kiln outer wall, guarantee chimney unlatching;

3) starting heater heats sintering chamber;

4) temperature in sintering chamber reaches 150 degree when above, starts flame device heated sheet is heated, and the wax cigarette that discharge in described sintering chamber is first by the jet of flame device, then after heated sheet, is discharged to outside;

5) when heater work is after approximately 20 minutes, spontaneous firing when wax cigarette passes through heated sheet from smokejack, now by being arranged at the heated sheet temperature that the thermometric galvanic couple at heated sheet place feeds back, control gas supply, to regulate the duration and degree of heating size of flame device, reach the clean-burning object of remaining suspension wax molecule in flue gas;

6) in sintering furnace, reach after 650 degree, close flame device.

2. the method for operating of a kind of environmental protection and energy saving wax removal kiln according to claim 1, is characterized in that, a side of described heated sheet is connected with the inwall of described smokejack, and the offside of described heated sheet is provided with the bracing wire that stove discharge capacity is adjusted in a control heated sheet landing.

3. the method for operating of a kind of environmental protection and energy saving wax removal kiln according to claim 2, is characterized in that, described bracing wire adopts metal bracing wire.

4. according to the method for operating of a kind of environmental protection and energy saving wax removal kiln described in any one in claims 1 to 3, it is characterized in that, described flame device adopts firelock, and firelock carries out gas supply by gas pipeline.

5. the method for operating of a kind of environmental protection and energy saving wax removal kiln according to claim 4, it is characterized in that, described heater adopts a plurality of firelocks, and a plurality of firelocks are evenly arranged on the bottom in described sintering chamber, and a plurality of firelocks carry out gas supply by gas pipeline.

6. according to the method for operating of a kind of environmental protection and energy saving wax removal kiln described in any one in claims 1 to 3, it is characterized in that, described heated sheet adopts a high temperature resistant steel plate, and the jet of described flame device is towards the plate face of described heated sheet.

7. according to the method for operating of a kind of environmental protection and energy saving wax removal kiln described in any one in claims 1 to 3, it is characterized in that, described flame device is connected a control module with described heater, regulates the size of flame amount by control module regulating gas supply;

Described thermometric galvanic couple connects described control module.

8. the method for operating of a kind of environmental protection and energy saving wax removal kiln according to claim 7, it is characterized in that, described control module connects a temperature sensor for detection of described sintering cavity temperature, and described temperature sensor is arranged on the chamber wall in described sintering chamber or outside described sintering chamber.