Novel heating type coating machine drying oven

Abstract

The utility model provides a novel heating mode coating machine oven which comprises an oven body and a heat exchanger, an RTO combustion furnace and a temperature PID regulation control linkage air brake are arranged in the oven body, the RTO combustion furnace comprises a hearth, natural gas and environment fresh air in the hearth are heated to generate hot air, the hot air is heated to 200 DEG C through the heat exchanger, and a main cavity and an auxiliary cavity are arranged in the oven body. A waste heat recovery heat exchanger is communicated behind the main cavity and the auxiliary cavity, a condensation system is communicated behind the waste heat recovery heat exchanger, a fresh air fan is arranged on one side of the waste heat recovery heat exchanger, the fresh air fan is communicated with the heat exchanger, hot air enters the main cavity and the auxiliary cavity for hot air drying, and waste gas is discharged after heat exchange of the waste heat recovery heat exchanger and cooling of the condensation system. The other part of hot air returns to the waste heat recovery heat exchanger through the exhaust fan to be heated and then is heated through the heat exchanger through the fresh air fan, one part of hot air is mixed with the heated hot air and then enters the main cavity and the auxiliary cavity again, cost can be saved, energy consumption is reduced, and the natural gas utilization rate is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of coating and drying, in particular to a coating machine oven with a novel heating method. Background Art

[0002] Coating machines are an important equipment in many emerging industries, such as new energy automotive electronics and optics. Ensuring coating accuracy is the basis of coating equipment. After the coating process is completed, the slurry on the foil needs to be completely dried, which is an important part of the electrode manufacturing process. During the drying process, the problem of high energy consumption has always plagued major battery manufacturers.

[0003] In order to achieve the above-mentioned purpose, the utility model provides a coating machine oven with a new heating method, which can solve the problems raised in the above-mentioned background technology. Utility Model Content

[0004] The utility model adopts the following technical solutions to achieve:

[0005] A coating machine oven with a new heating method includes a box body and a heat exchanger. The box body is provided with an RTO combustion furnace and a temperature PID regulation control linkage wind gate. The RTO combustion furnace includes a furnace, which is connected to the heat exchanger. The heat exchanger is used to heat the hot air. The natural gas and the fresh air in the furnace enter the furnace to heat and generate hot air. The hot air is heated to 200° by the heat exchanger. A main cavity and a sub-cavity are provided in the box body. The main cavity and the sub-cavity are used to dry the hot air. The outlet ends of the main cavity and the sub-cavity are connected. There is a waste heat recovery heat exchanger, the outlet end of the waste heat recovery heat exchanger is connected to a condensation system, one side of the waste heat recovery heat exchanger is connected to a fresh air fan, the output end of the fresh air fan is connected to the heat exchanger, the hot air enters the main cavity and the auxiliary cavity for hot air drying, and then passes through the waste heat recovery heat exchanger and is cooled by the condensation system to discharge the exhaust gas, another part of the hot air returns to the waste heat recovery heat exchanger through the exhaust fan for heating, and then passes through the fresh air fan and the heat exchanger for heating, and a part of the recovered hot air is mixed with the heated hot air and enters the main cavity and the auxiliary cavity again.

[0006] Preferably, the temperature PID regulation control linkage damper is connected to the heat exchanger, which can adjust the amount of mixed air, save costs, reduce energy consumption, and improve the utilization rate of natural gas combustion.

[0007] Preferably, the furnace is connected to a single multi-valve RTO body, which includes a main pipeline, a switching valve, a distribution chamber, a heat storage layer, and a combustion chamber. The distribution chamber and the heat storage layer are divided into multiple sectors, namely, an intake sector, a purge sector, and an exhaust sector. Each sector is provided with an intake valve, an exhaust valve, and a purge valve. The switch valve is used to realize the function switching of each sector. The exhaust gas from the intake sector passes through the intake valve, the distribution chamber, and the heat storage layer in turn and then enters the combustion chamber for incineration. The purge valve is used to transfer the purge sector to the combustion chamber. Clean air is introduced into the distribution chamber and the heat storage layer, and the isolated exhaust gas is blown into the combustion chamber. The exhaust sector is used to discharge high-temperature gas. The high-temperature gas after incineration and purification in the exhaust sector passes through the heat storage layer and the distribution chamber discharges RTO from the exhaust valve. The cooled heat storage layer is reheated, and the high-temperature gas is cooled at the same time. The seven-sector RTO is arranged as follows: when sectors 1, 2, and 3 are intake sectors, sectors 4, 5, and 6 are exhaust sectors, and sector 7 is the purge sector; when sectors 2, 3, and 4 are intake sectors, sectors 5, 6, and 7 are exhaust sectors, and sector 1 is the purge sector. By analogy, each sector performs the functions of intake, purge, and exhaust in turn.

[0008] Preferably, a gas pipeline is provided outside the box body, and a gas intake monitoring system and a gas combustion control system are provided on the side of the gas pipeline away from the box body.

[0009] Preferably, a temperature sensor is provided next to the temperature PID regulation control linkage wind damper.

[0010] Preferably, an exhaust fan is provided at the rear end of the condensation system.

[0011] Preferably, an RTO concentration detection device is provided at the rear end of the exhaust fan.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] The utility model facilitates the recovery and heating of hot air from waste heat and the mixing of hot air heated to 200 degrees through the coordination among the arranged box, heat exchanger, RTO combustion furnace, temperature PID regulation control linkage damper, waste heat recovery heat exchanger, condensing system, fresh air fan and exhaust fan, thus saving costs, reducing energy consumption and improving the utilization rate of natural gas. The combustion condition and safety of the gas combustion can be monitored in time through the arranged gas monitoring system and combustion control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of a simple natural gas heating process of the utility model;

[0015] Figure 2 This is the working principle diagram of the indirect heating of the gas furnace of the utility model;

[0016] Figure 3 It is the natural gas transmission control diagram logic of the utility model;

[0017] Figure 4 This is the safety control logic diagram of the indirect heating of the gas furnace of the utility model;

[0018] Figure 5 This is a logic diagram of the indirect heating temperature control of the gas furnace of the utility model. DETAILED DESCRIPTION

[0019] In order to facilitate the understanding of the present invention, the present invention will be described in more detail below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings, but the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0020] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly connected by technicians in the technical field of the present invention. The terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used in this article includes any and all combinations of one or more related listed items.

[0022] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0023] Please refer to the attached Figure 1-5, including a box body and a heat exchanger, wherein the box body is provided with an RTO combustion furnace and a temperature PID regulating and controlling linkage wind gate, wherein the RTO combustion furnace includes a furnace, wherein the natural gas and the ambient fresh air in the furnace enter into the furnace to heat and generate hot air, and the hot air is heated to 200° through the heat exchanger, wherein the box body is provided with a main chamber and a secondary chamber, wherein the rear end of the main chamber and the secondary chamber are connected with a waste heat recovery heat exchanger, wherein the rear end of the waste heat recovery heat exchanger is connected with a condensing system, wherein one side of the waste heat recovery heat exchanger is connected with a fresh air fan, wherein the output end of the fresh air fan is connected with the heat exchanger, and the hot air enters the main chamber and the secondary chamber for hot air drying, and then passes through the waste heat recovery heat exchanger and is cooled by the condensing system to discharge the waste gas, and another part of the hot air returns to the waste heat recovery heat exchanger through the exhaust fan for heating, and then passes through the fresh air fan through the heat exchanger for heating, and then a part of the recovered hot air is mixed with the heated hot air and enters the main chamber and the secondary chamber again, and the amount of the mixed air is adjusted. It can save costs, reduce energy consumption, improve the utilization rate of natural gas combustion, and reduce operating costs.

[0024] Please refer to Figure 1 , Figure 4 , Figure 5 The temperature PID regulation control linkage wind gate is connected with the heat exchanger, which can adjust the amount of mixed air, save costs, reduce energy consumption, improve the utilization rate of natural gas combustion, save costs, reduce energy consumption, improve the utilization rate of natural gas combustion, and reduce operating costs.

[0025] Please pay attention to Figure 2 The furnace is connected to a single multi-valve RTO body outside, which is composed of a gas main pipeline, a switching valve, a distribution chamber, a heat storage layer, and a combustion chamber. The distribution chamber and the heat storage layer are divided into multiple sectors, which are rotated and alternately divided into an intake sector, a purge sector, and an exhaust sector. Each sector is independently equipped with three valves, namely, an intake valve, an exhaust valve, and a purge valve. The function switching of each sector is realized by switching the valves. The exhaust gas from the intake sector passes through the intake valve and the distribution chamber and is preheated by the heat storage layer before entering the combustion chamber for incineration. At the same time, the heat storage layer is cooled, and the clean air from the purge sector passes through the purge valve. The valve enters the distribution chamber and the heat storage layer, and the residual exhaust gas is purged into the combustion chamber for incineration. At the same time, the heat storage layer is further cooled. The high-temperature gas after incineration and purification in the exhaust sector passes through the heat storage layer, and the distribution chamber discharges RTO from the exhaust valve. The cooled heat storage layer is reheated, and the high-temperature gas is cooled. The seven-sector RTO is arranged as follows: when sectors 1, 2, and 3 are intake sectors, sectors 4, 5, and 6 are exhaust sectors, and sector 7 is the purge sector. When sectors 2, 3, and 4 are intake sectors, sectors 5, 6, and 7 are exhaust sectors, and sector 1 is the purge sector. By analogy, each sector plays the role of intake, purge, and exhaust in turn, which can improve the combustion efficiency of the gas.

[0026] Please pay attention to Figure 3A gas pipeline is provided outside the box body, and a gas intake monitoring system and a gas combustion control system are provided on the side of the gas pipeline away from the box body, which can realize timely monitoring of the combustion status of the gas and the safety of the gas combustion.

[0027] Please pay attention to Figure 1 A temperature sensor is provided next to the temperature PID regulation control linkage wind gate.

[0028] Please pay attention to Figure 1 An exhaust fan is provided at the rear end of the condensation system.

[0029] Please pay attention to Figure 4 , Figure 5 An RTO concentration detection device is provided at the rear end of the exhaust fan.

[0030] The specific implementation of the utility model is:

[0031] Through the gas pipeline and the air inlet, the natural gas and the fresh air from the environment enter the furnace to be heated to generate hot air, which is heated to 200° through the heat exchanger, and then enters the main chamber and the auxiliary chamber in the box to dry the product. After that, it passes through the waste heat recovery heat exchanger and is cooled by the condensation system to discharge the exhaust gas. Another part of the hot air returns to the waste heat recovery heat exchanger through the exhaust fan for heating, and then passes through the fresh air fan and the heat exchanger for heating. A part of the recovered hot air is mixed with the heated hot air and enters the main chamber and the auxiliary chamber again. The temperature PID regulation control linkage wind gate controls the amount of hot air recovered from the waste heat to improve the utilization rate of natural gas combustion heating, thereby achieving the effect of reducing energy consumption. The specific calculation takes the double-layer coating machine of the 70m oven as an example: the energy consumption comparison of indirect heating with natural gas and heating with thermal oil: the main gases produced by natural gas combustion are nitrogen Calculation of thermal efficiency of indirect heating of natural gas / carbon dioxide / water vapor (without considering the heat dissipation of the burner to the air, etc.) Thermal efficiency = 1-(thermal enthalpy of water vapor emission * mass of water vapor emission + thermal enthalpy of CO2 emission * volumetric emission of C02 + thermal enthalpy of N2 emission * volumetric emission of N2) / (thermal enthalpy of natural gas * volumetric natural gas + thermal enthalpy of air * volumetric air + combustion production heat) Thermal efficiency = 1-(2748*1.6+397*1+324*8.65) / (36*1+30*11+35685)=0.79, thermal oil pipeline efficiency: pipeline thermal efficiency = heat used by the oven / heat output by the boiler, thermal oil pipeline efficiency = (burner efficiency+0.05)*oil pipeline efficiency = (0.79+0.05)*0.78=0.65 In summary: the thermal efficiency of the new heating method can be improved by 0.14.

[0032] The above description of the utility model in combination with the accompanying drawings is an exemplary description. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as the non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A new type of heating coating oven, characterized by: It includes a box body and a heat exchanger. The box body is provided with an RTO combustion furnace and a temperature PID regulation control linkage damper. The RTO combustion furnace includes a furnace, which is connected to the heat exchanger. The heat exchanger is used to heat the hot air. A main cavity and a sub-cavity are provided in the box body. The main cavity and the sub-cavity are used to dry the hot air. The outlet ends of the main cavity and the sub-cavity are connected to a waste heat recovery heat exchanger. The outlet end of the waste heat recovery heat exchanger is connected to a condensation system. One side of the waste heat recovery heat exchanger is connected to a fresh air fan. The output end of the fresh air fan is connected to the heat exchanger.

2. The novel heating coating oven according to claim 1 is characterized in that: The temperature PID regulation control linkage damper is connected to the heat exchanger and is used to adjust the amount of mixed air.

3. The novel heating coating oven according to claim 1 is characterized in that: The furnace is connected to a single multi-valve RTO body outside, which includes a gas main pipeline, a switching valve, a distribution chamber, a heat storage layer, and a combustion chamber. The distribution chamber and the heat storage layer include sectors, which are divided into an intake sector, a purge sector, and an exhaust sector. Each sector is provided with an intake valve, an exhaust valve, and a purge valve. The switch valve is used to realize the function switching of each sector. The exhaust gas from the intake sector passes through the intake valve and the distribution chamber and is preheated by the heat storage layer before entering the combustion chamber for incineration. The purge valve is used to introduce the clean air of the purge sector into the distribution chamber and the heat storage layer, and isolate the exhaust gas from being blown into the combustion chamber. The exhaust sector is used to discharge high-temperature gas.

4. The novel heating coating oven according to claim 1 is characterized in that: A gas pipeline is provided outside the box body, and a gas intake monitoring system and a gas combustion control system are provided on the side of the gas pipeline away from the box body.

5. The novel heating coating oven according to claim 2 is characterized in that: A temperature sensor is arranged beside the temperature PID regulation control linkage wind damper.

6. The novel heating coating oven according to claim 1 is characterized in that: An exhaust fan is arranged at the rear end of the condensation system.

7. The novel heating coating machine oven according to claim 6 is characterized in that: An RTO concentration detection device is provided at the rear end of the exhaust fan.

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