A temperature control system for a color coating line RTO

Abstract

This utility model relates to the field of exhaust gas treatment technology for color coating production lines, and discloses a temperature control system for a color coating line RTO (Regenerative Thermal Oxidizer), including an inlet pipe, an inlet fan, an outlet pipe, an outlet fan, a cold bypass pipe, a control valve one, a hot bypass pipe, and a control valve two. Through the above-described structure, this utility model can rapidly reduce the temperature inside the RTO incineration chamber at the beginning of exhaust gas treatment, making the internal temperature of the RTO more stable and preventing the incineration chamber temperature from rising and reaching the alarm temperature range, thus avoiding product degradation and effectively reducing the user's production costs.

Description

Technical Field

[0001] This utility model relates to the field of exhaust gas treatment technology for color coating production lines, and in particular to a temperature control system for a color coating line RTO. Background Technology

[0002] During the color coating production process, the organic waste gas generated is incinerated by RTO equipment. Due to the high heat exchange efficiency and waste gas treatment efficiency of RTO, RTO equipment has been widely used in color coating lines.

[0003] Because RTOs employ the principle of regenerative thermal oxidizer (RTO), during the preparation process before production, the RTO's heat storage medium is heated by a burner and stored in the heat storage medium. This ensures that the temperature of the RTO combustion chamber remains within the decomposition temperature range of the waste gas (730-800℃), allowing for thorough decomposition of the waste gas initially introduced into the RTO. However, at the beginning of RTO waste gas treatment, the sudden entry of a large amount of organic solvents from the waste gas into the RTO releases a significant amount of heat. Simultaneously, the heat storage medium is filled with heat, and the combined effect of these two heat sources causes the temperature inside the RTO to spike instantaneously, reaching the RTO's alarm temperature range (900-1000 degrees Celsius), thus triggering the RTO high-temperature alarm.

[0004] Currently, there is no solution in the industry that can directly solve the above problems. The only option is to start the production line at a low speed and then gradually increase the speed to gradually increase the amount of exhaust gas entering the RTO. However, this gradual speed-up process will degrade the product and increase the user's production costs. Utility Model Content

[0005] Based on the above problems, the purpose of this utility model is to provide a temperature control system for a color coating line RTO to solve the problems existing in the prior art.

[0006] The present invention adopts the following technical solution:

[0007] This utility model provides a temperature control system for a color coating line RTO, including an inlet pipe, an inlet fan, an outlet pipe, and an outlet fan. The inlet pipe and the outlet pipe are respectively connected to the bottom of the RTO. The inlet fan is installed on the inlet pipe, and the outlet fan is installed on the outlet pipe. A cold bypass pipe is connected to the inlet pipe, and the end of the cold bypass pipe is connected to the top of the RTO. A control valve one is installed on the cold bypass pipe. A hot bypass pipe is connected to the outlet pipe, and the end of the hot bypass pipe is connected to the top of the RTO. A control valve two is installed on the hot bypass pipe.

[0008] Furthermore, the connection between the cold bypass pipeline and the inlet pipeline is located between the inlet fan and the RTO.

[0009] Furthermore, it also includes a temperature detection device, which includes a temperature sensor disposed inside the RTO. The temperature sensor is electrically connected to the controller, and the controller is electrically connected to the inlet fan and the control valve.

[0010] Furthermore, the control valve is configured as a proportional control valve.

[0011] Furthermore, it also includes a cooling device, which includes a cooling sleeve that is fitted onto the outer wall of the cold bypass pipe, and both ends of the cooling sleeve are connected to an external cooling control device.

[0012] Furthermore, the connection between the heat bypass pipeline and the outlet pipeline is located between the outlet fan and the RTO.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] By configuring the inlet fan, cold bypass pipeline, control valve one, outlet fan, hot bypass pipeline, and control valve two, the temperature inside the RTO incinerator can be quickly reduced at the beginning of waste gas treatment, making the internal temperature of the RTO more stable and preventing the incinerator temperature from rising and reaching the alarm temperature range, which would cause the product to be downgraded. This effectively reduces the user's production costs. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the temperature control system of the RTO (Regenerative Thermal Oxidizer) in the color coating line of this utility model;

[0017] Figure 2 This is another structural schematic diagram of the temperature control system of the RTO (Regenerative Thermal Oxidizer) of the color coating line of this utility model.

[0018] Explanation of reference numerals in the attached diagram: 1. Inlet pipe; 2. Inlet fan; 3. Outlet pipe; 4. Outlet fan; 5. Cold bypass pipe; 6. Control valve one; 7. Hot bypass pipe; 8. Control valve two; 9. Temperature detection device; 91. Temperature sensor; 10. Incineration chamber; 11. Cooling device; 111. Cooling jacket; 1111. Inlet pipe; 1112. Outlet pipe. Detailed Implementation

[0019] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 As shown, this embodiment discloses a temperature control system for a color coating line RTO, including an inlet pipe 1, an inlet fan 2, an outlet pipe 3, and an outlet fan 4. The inlet pipe 1 and the outlet pipe 3 are respectively connected to the bottom of the RTO. The inlet fan 2 is installed on the inlet pipe 1, and the outlet fan 4 is installed on the outlet pipe 3. A cold bypass pipe 5 is connected to the inlet pipe 1, and the end of the cold bypass pipe 5 is connected to the top of the RTO. A control valve 6 is installed on the cold bypass pipe 5. A hot bypass pipe 7 is connected to the outlet pipe 3, and the end of the hot bypass pipe 7 is connected to the top of the RTO. A control valve 8 is installed on the hot bypass pipe 7.

[0021] In this embodiment, the inlet pipe 1 is connected to the exhaust gas source at the end furthest from the RTO. An inlet valve is installed at the end of the inlet pipe 1 connected to the RTO. The inlet fan 2 is fixedly installed on the inlet pipe 1. The connection between the cold bypass pipe 5 and the inlet pipe 1 is located between the inlet fan 2 and the RTO. The outlet pipe 3 is connected to the outside or connected to other processes at the end furthest from the RTO. An outlet valve is installed at the end of the outlet pipe 3 connected to the RTO. The outlet fan 4 is fixedly installed on the outlet pipe 3. The connection between the hot bypass pipe 7 and the outlet pipe 3 is located between the outlet fan 4 and the RTO. Control valve 6 and control valve 8 are both set as proportional control valves.

[0022] In use, under the action of the inlet fan 2, the exhaust gas enters from the bottom of the RTO through the inlet pipe 1 and is preheated by the heat storage body inside the RTO before entering the incineration chamber 10 for pyrolysis. At the beginning of the exhaust gas treatment, a large amount of organic solvent in the exhaust gas suddenly enters the RTO and releases a large amount of heat. At this time, the control valve 6 is opened to directly introduce the low-temperature exhaust gas into the incineration chamber 10 through the cold bypass pipe 5. The temperature inside the incineration chamber 10 is reduced by directly absorbing heat from the low-temperature exhaust gas. At the same time, the control valve 8 is opened to dissipate the heat inside the incineration chamber 10 through the heat bypass pipe 7.

[0023] By adopting this solution and using the above-mentioned structures in combination, the temperature inside the RTO incineration chamber 10 can be quickly reduced at the beginning of the waste gas treatment, making the internal temperature of the RTO more stable. This avoids the situation where the temperature inside the incineration chamber 10 rises and reaches the alarm temperature range, causing the product to be downgraded, thereby effectively reducing the user's production costs.

[0024] Further optimization of the scheme also includes a temperature detection device 9, which includes a temperature sensor 91 installed inside the RTO. The temperature sensor 91 is electrically connected to the controller, and the controller is electrically connected to the inlet fan 2 and the control valve 6.

[0025] In this embodiment, the temperature sensor 91 is located at the top of the RTO incineration chamber 10 and is used to measure the temperature inside the incineration chamber 10 in real time. The controller can be set as a PLC controller. The temperature sensor 91 transmits the measured temperature to the controller in the form of a signal. After receiving the signal from the temperature sensor 91, the controller controls the start and stop of the inlet fan 2 and the opening degree of the control valve 6.

[0026] As an optional embodiment, the controller can also be electrically connected to the outlet fan 4 and the control valve 8; this enables automatic control of the start and stop of the outlet fan 4 and the opening degree of the control valve 8.

[0027] Further optimize the plan, such as Figure 2 As shown, it also includes a cooling device 11, which includes a cooling sleeve 111. The cooling sleeve 111 is fitted on the outer wall of the cold bypass pipe 5, and both ends of the cooling sleeve 111 are connected to an external cooling control device.

[0028] In this embodiment, the cooling control device can be configured as a water-cooled or air-cooled type. The cooling jacket 111 has a cavity inside. One end of the cooling jacket 111 is fixed with an inlet pipe 1111, and the other end is fixed with an outlet pipe 1112. The inlet pipe 1111 and the outlet pipe 1112 are respectively connected to the cavity. In use, the cooling control device introduces cooling water or cold air into the cavity of the cooling jacket 111 through the inlet pipe 1111. After flowing in the cavity, the air is discharged from the outlet pipe 1112 of the cooling jacket 111 and flows back to the cooling control device for cooling. This cycle can further cool the low-temperature exhaust gas in the cold bypass pipe 5, so that the exhaust gas can absorb more heat after entering the RTO, thereby improving the cooling effect in the RTO incineration chamber 10.

[0029] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A temperature control system for a color coating line RTO, comprising an inlet pipe (1), an inlet fan (2), an outlet pipe (3), and an outlet fan (4), wherein the inlet pipe (1) and the outlet pipe (3) are respectively connected to the bottom of the RTO, the inlet fan (2) is disposed on the inlet pipe (1), and the outlet fan (4) is disposed on the outlet pipe (3), characterized in that: The inlet pipe (1) is connected to a cold bypass pipe (5), the end of which is connected to the top of the RTO, and a control valve (6) is provided on the cold bypass pipe (5); the outlet pipe (3) is connected to a hot bypass pipe (7), the end of which is connected to the top of the RTO, and a control valve (8) is provided on the hot bypass pipe (7).

2. The temperature control system for the RTO (Regenerative Thermal Oxidizer) of the color coating line according to claim 1, characterized in that: The connection between the cold bypass pipe (5) and the inlet pipe (1) is located between the inlet fan (2) and the RTO.

3. The temperature control system for the RTO of the color coating line according to claim 2, characterized in that: It also includes a temperature detection device (9), which includes a temperature sensor (91) disposed inside the RTO. The temperature sensor (91) is electrically connected to the controller, and the controller is electrically connected to the inlet fan (2) and the control valve (6).

4. The temperature control system for the RTO of the color coating line according to claim 3, characterized in that: The control valve (6) is configured as a proportional control valve.

5. The temperature control system for the RTO of the color coating line according to claim 1, characterized in that: It also includes a cooling device (11), which includes a cooling sleeve (111) which is fitted on the outer wall of the cold bypass pipe (5) and the two ends of the cooling sleeve (111) are respectively connected to an external cooling control device.

6. The temperature control system for the RTO of the color coating line according to claim 1, characterized in that: The connection between the heat bypass pipeline (7) and the outlet pipeline (3) is located between the outlet fan (4) and the RTO.

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