CN203876114U - Tape casting machine with functions of heat energy recycling and waste gas treatment - Google Patents

Abstract

The utility model relates to electronic ceramic production equipment, in particular to a casting machine with the functions of heat energy recovery and waste gas treatment, which is mainly composed of driving rollers, driven rollers, casting heads, conveyor belts, ovens, hot waste gas treatment systems, etc. . The utility model uses the hot waste gas produced in the drying ceramic slurry of the casting machine to heat the fresh air through the heat exchanger, and blows the fresh hot air into the oven through the fan; and the volatile organic compounds (VOCs) in the waste gas pass through the condenser After the initial condensation, the volatile organic compounds in the exhaust gas are separated through the membrane module, and the harmless residual air is directly emptied, and the separated organic compounds are further condensed and placed in the liquid storage tank. The utility model is suitable for multi-layer packaging fields of ceramic substrates, laminated capacitors and inductors, chip components, piezoelectric devices, infrared detection devices, fuel cells and integrated circuits. Compared with the prior art, the utility model has the advantages of saving energy, The advantages of environmental friendliness.

Description

A tape casting machine with functions of heat energy recovery and waste gas treatment

technical field

The utility model relates to electronic ceramic production equipment, in particular to a casting machine with functions of heat energy recovery and waste gas treatment. the

Background technique

Electronic ceramics are widely used in the fields of microelectronics technology, optoelectronics and power electronics technology. Electronic ceramics slurry mainly consists of inorganic ceramic powder and organic materials such as binders, plasticizers, dispersants and solvents. The electronic ceramic slurry needs to go through a series of processes such as casting, screen printing, and sintering to make the required electronic ceramics, and the casting process mainly makes ceramic green bodies by drying. The main production equipment of the casting process is the casting machine. The hot waste gas generated during the drying process of the existing casting machine is directly discharged into the atmosphere, which wastes heat energy on the one hand, and produces a large amount of volatile gas during the drying process of the ceramic slurry on the other hand. Organic compounds (VOCs) are mostly highly toxic substances, which are directly emptied without any treatment and seriously pollute the environment. Although the invention patent CN102338557A considers the use of heat exchangers to recover heat energy, after the drying is stable, neither fresh air enters nor hot air is discharged inside the oven. In this way, although the temperature inside the oven meets the requirements, the drying humidity is not considered, and there is a problem of unsatisfactory drying. Possibly; although the published patent CN201559281U also considers the use of heat exchangers to recover heat energy, it is directly re-discharged into the oven by the hot air discharged from the inside of the oven, without considering the influence of the exergy value on the drying process of the ceramic slurry. The disadvantage of low drying efficiency. the

Utility model content

The purpose of the utility model is to provide the utility model related to electronic ceramics production equipment, especially a new casting machine with functions of heat energy recovery and waste gas treatment, so as to solve the defects of energy waste and environmental pollution of existing equipment. the

In order to achieve the above purpose, the following technical solution is adopted: a casting machine with functions of heat energy recovery and exhaust gas treatment, which is composed of driving rollers, driven rollers, casting heads, conveyor belts, ovens, thermal exhaust gas treatment systems, etc. The driving and driven rollers drive the conveyor belt to move, and the conveyor belt carries the ceramic slurry into the oven to be dried, and the dried ceramic green body is carried out of the oven; the hot exhaust gas generated during the drying process is treated by the thermal exhaust gas treatment system. The hot exhaust gas system includes filters, fans, heat exchangers, condensers, membrane modules, liquid storage tanks and other components; one end of the filter is connected to the atmosphere, and the other end is connected to the inlet of the heat exchanger; the heat exchange The condenser has two channels, one end of the first channel is connected to the outlet of the No. 1 exhaust fan, the other end is connected to the inlet of the No. The inlet of the No. 2 exhaust fan is connected; the oven has an air inlet and an air outlet, the outlet of the second fan is connected with the air inlet of the oven, the inlet of the first exhaust fan is connected with the outlet of the oven, and the hot exhaust gas treatment system transfers heated fresh air from both sides of the oven. The end is blown in, and the oven-dried exhaust gas is drawn into the hot exhaust gas treatment system from the bottom. the

The hot exhaust gas treatment system includes a condenser capable of separating organic matter, and the organic matter is condensed into a liquid state and placed in a liquid storage tank. the

The exhaust gas treatment system further includes a membrane module, and the membrane module includes one or more layers of permeable membranes, which can permeate organic matter. the

Further, the hot exhaust gas treatment system further includes a second condenser, the inlet of the second condenser is connected to the outlet of the membrane module. the

Further, the preferred connection mode of this solution is: one end of the filter is connected to the atmosphere, and the other end is connected to the inlet of the heat exchanger; the heat exchanger has two channels, and one end of the first channel is connected to the first exhaust fan. The air outlet is connected, and the other end is connected with the inlet of the No. 1 condenser. One end of the second channel is connected with the filter outlet, and the other end is connected with the air inlet of the No. 2 exhaust fan; the oven has an air inlet and an air outlet. The outlet of the No. exhaust fan is connected with the air inlet of the oven, the inlet of the first exhaust fan is connected with the outlet of the oven; the outlet of the No. 1 condenser is connected with the inlet of the membrane module; the outlet of the membrane module is connected with the inlet of the No. 3 exhaust fan; The outlet of the No. 3 exhaust fan is connected to the inlet of the No. 2 condenser, and the No. 2 condenser includes two outlets, wherein the first outlet is connected to the liquid storage tank, and the second outlet is directly connected to the atmosphere. the

In the above solution, the filter is a combination of a coarse-effect filter and a medium-effect filter, and if necessary, a high-efficiency or precision filter can be selected. the

In the above scheme, there is a heat source device inside the oven, which can heat the air. The heat source device adopts a PID temperature control adjustment method, and the hot waste gas treatment system is located on the side of the oven. the

In the above solution, the heat exchanger is preferably a heat exchanger with a high heat transfer coefficient, and the plate heat exchanger is preferred in the present invention. the

In the above solution, the membrane module has different permeable membranes, which can permeate various organic substances encountered in production; the permeated organic substances need to be condensed by the condenser and placed in the liquid storage tank, and the residual air can be directly discharged null. the

In the above scheme, the organic matter in the liquid storage tank will be treated by incineration. the

Compared with the prior art, the utility model is more environmentally friendly and energy-saving. The heat in the hot exhaust gas is used to heat the fresh air through the heat exchanger, and the hot fresh air is blown into the oven. Since the oven has a PID temperature control and adjustment system, Therefore, the heat energy blown into the oven can reduce the power consumption of the oven and save electric energy; after a large amount of volatile organic compounds contained in the hot exhaust gas pass through the steps of condensation→membrane permeation→condensation, the remaining harmless gas is directly discharged to the atmosphere, while The remaining liquid volatile organic compounds with high volume content are condensed and stored, and these toxic wastes can be disposed of by burning or other methods, so as to ensure the environmental protection requirements of the electronic ceramics production process. the

Description of drawings

Fig. 1, 2 are structural representations of the utility model. the

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described. the

The utility model principle is as shown in Figure 1 and Figure 2. The driving roller 3 drives the driven roller 1 to move, the conveyor belt 2 is installed on the driving roller, the ceramic slurry is evenly coated on the conveyor belt 2 through the casting head 7, and the conveyor belt carries the slurry into the oven 5 to be dried. After the drying is completed, the formed green body is carried out of the oven, and the hot waste gas generated during the drying of the slurry is blown out from the channel 6 through the fan 17, and the blown out hot waste gas is passed into the heat exchanger 16, and the heat exchanger 16 will The fresh air passing through the filter 15 is heated, and the heated fresh air is blown into the oven from both ends of the oven by the fan 9 . the

Fig. 2 is a hot exhaust gas treatment system. There is a heat source inside the oven 8 to heat the air. The fan 9 blows fresh air into the oven 8 continuously. The hot exhaust gas generated after the oven works is drawn out by the first fan 17, The hot exhaust gas is blown into the heat exchanger 16, and the heat exchanger 16 uses the hot exhaust gas to heat the fresh air passing through the filter 15, and the heated fresh hot air is blown into the oven 8 by the second fan 9, which is a heat recovery process The exhaust gas passing through the heat exchanger is passed into the first condenser 10 to realize preliminary condensation, the exhaust gas after preliminary condensation passes through the membrane module 11, and the residual air is directly emptied, and the remaining high-content organic waste gas is drawn out by the third fan 14. 2. After passing through the condenser 13, it is further condensed into a liquid state and placed in the liquid storage tank 12, and the residual air is continuously emptied, and the waste liquid placed in the liquid storage tank is left for further harmless treatment. the

The above are only preferred examples of the present utility model. It should be pointed out that for those skilled in the art, under the technical inspiration provided by the utility model, other equivalent modifications or improvements can also be made, which should also be regarded as the protection scope of the utility model. the

Claims (6)

1. A casting machine with heat energy recovery and waste gas treatment functions, including driving rollers, driven rollers, casting heads, hot waste gas treatment systems, conveyor belts, ovens, and conveyor belts passing through the gap between the main and driven rollers Oven, characterized in that: the hot waste gas treatment system includes a filter, a heat exchanger and an exhaust fan, one end of the filter is connected to the atmosphere, and the other end is connected to the inlet of the heat exchanger; the heat exchanger has two channels , where one end of the first channel is connected to the outlet of the first exhaust fan, and the other end discharges the residual air; one end of the second channel is connected to the outlet of the filter, and the other end is connected to the inlet of the second exhaust fan; the oven has an air inlet and an outlet. The outlet of the second fan is connected to the air inlet of the oven, the inlet of the first exhaust fan is connected to the outlet of the oven, the hot exhaust gas treatment system blows heated fresh air from both ends of the oven, and the exhaust gas dried by the oven is sucked in from the bottom in the hot exhaust system. the 2. The tape casting machine according to claim 1, wherein the hot waste gas treatment system includes a condenser capable of condensing organic matter, and the organic matter is condensed into a liquid state and then placed in a liquid storage tank. the 3 . The casting machine according to claim 2 , wherein the exhaust gas treatment system further comprises a membrane module, and the membrane module includes one or more layers of permeable membranes, which can separate organic substances. 4 . the 4 . The tape casting machine according to claim 3 , wherein the waste gas treatment system further comprises a second condenser, an air inlet of the second condenser is connected with an air outlet of the membrane module. 5 . the 5. The casting machine according to claim 4, characterized in that: the liquid storage tank comprises one or more than one liquid storage tank, and the condensed organic matter is respectively placed in the liquid storage tank. the 6. The tape casting machine according to any one of claims 1-5, characterized in that the hot exhaust gas treatment system is located on the side of the oven. the