RTO safety explosion suppression interlocking device

Abstract

The utility model discloses an RTO safety explosion suppression interlocking device. A second pneumatic valve is arranged on an air inlet pipeline of a combustion chamber. A third pneumatic valve is arranged on the gas pipeline, a fourth pneumatic valve is arranged on a pipeline communicating the combustion chamber with the gas distribution chamber, a first fan and a second fan are arranged on pipelines connected with the waste gas inlet and the air inlet respectively, a combustible gas detector is arranged in the gas distribution chamber, a flame detector is arranged in the combustion chamber, and a first VOC detector is arranged in the smoke distribution chamber. A reverse blowing fan and an air inlet valve are arranged on a pipeline connected with the chimney, a circulating valve is arranged on a second circulating pipeline communicated with the first heat storage chamber, a flame detector is interlocked with a third pneumatic valve and a fourth pneumatic valve, a combustible gas detector is interlocked with a second fan and a second pneumatic valve, and a first VOC detector is interlocked with the reverse blowing fan and the circulating valve. The device can monitor the concentration of combustible gas in waste gas entering the RTO incinerator in real time, whether the treated waste gas reaches the standard or not, whether secondary pollution exists or not and the like, and the safety of the device is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of waste gas treatment, in particular to an RTO safety explosion suppression interlocking device. Background Art

[0002] RTO, or regenerative thermal incinerator, is a highly efficient organic waste gas treatment equipment. Its principle is to oxidize the combustible substances in the waste gas into corresponding oxides and water at high temperature, thereby purifying the waste gas and recovering the heat released when the waste gas is decomposed. Existing regenerative thermal incinerators have done a lot of research on thermal efficiency and waste gas decomposition rate, but often tend to ignore safety. Whether the waste gas entering the RTO incinerator reaches the explosion limit, whether the waste gas is treated to the standard after RTO treatment, whether there is secondary pollution, and the monitoring of combustible gas and waste gas concentration, temperature, and pressure all affect the safety of the device. If real-time monitoring is not carried out, there may be a risk of explosion. Utility Model Content

[0003] In view of the shortcomings of the prior art, a RTO safety explosion suppression interlocking device is provided to solve the problems pointed out in the background technology.

[0004] In order to solve the above technical problems, the technical solution of the utility model is:

[0005] An RTO safety explosion suppression interlocking device comprises a furnace body and a PLC control system, wherein a gas distribution chamber, a first heat storage chamber, a combustion chamber, a second heat storage chamber and a smoke distribution chamber are arranged in the furnace body, a pneumatic valve 1 is arranged on the air intake pipe of the gas distribution chamber, and a pneumatic valve 2 is arranged on the air intake pipe of the combustion chamber; an air inlet and an exhaust gas inlet are arranged on the gas distribution chamber, a first fan is arranged on the air intake pipe connected to the exhaust gas inlet, and a second fan is arranged on the air intake pipe connected to the air inlet; a plurality of combustible gas detectors are arranged in the gas distribution chamber, the combustion chamber is connected to a gas pipeline, a pneumatic valve 3 is arranged on the gas pipeline, and an air outlet of the combustion chamber is also connected to the gas distribution chamber through a first circulation pipeline, and a pneumatic valve 4 is arranged on the first circulation pipeline Valve four, a burner and a burner ignition system are arranged inside the combustion chamber, the burner ignition system includes an igniter and multiple flame detectors, multiple first VOC detectors are arranged in the smoke distribution chamber, the smoke distribution chamber is also connected to a chimney, a back-blowing fan and an air intake valve are arranged on the pipe connected to the air inlet of the chimney, the pipe connected to the air inlet of the chimney is also connected to the first heat storage chamber through a second circulation pipe, a circulation valve is arranged on the second circulation pipe, the flame detector is interlocked with pneumatic valve three and pneumatic valve four respectively through a PLC control system, the combustible gas detector is interlocked with the second fan and pneumatic valve two respectively through a PLC control system, and the first VOC detector is interlocked with the back-blowing fan and the circulation valve respectively through a PLC control system.

[0006] As an improved technical solution, a third heat storage chamber is further arranged between the first heat storage chamber and the combustion chamber.

[0007] As a preferred technical solution, the combustible gas detector is also interlocked with the burner through a PLC control system.

[0008] As an improved technical solution, a water spray mechanism is provided in the smoke distribution chamber, and the water spray mechanism includes a water inlet pipe and a spray plate connected to the water inlet pipe. A liquid discharge port is provided at the bottom of the smoke distribution chamber.

[0009] As an improved technical solution, a first flame arrester is provided on the pipeline between the gas distribution chamber and the combustion chamber.

[0010] As an improved technical solution, a first pressure sensor and a second pressure sensor are respectively provided in the gas distribution chamber and the combustion chamber, and the first pressure sensor and the second pressure sensor are respectively interlocked with the first fan and the second fan through a PLC control system.

[0011] As an improved technical solution, a pneumatic valve five is provided on the air inlet duct of the smoke distribution chamber, and the pneumatic valve five is interlocked with the combustible gas detector through a PLC control system.

[0012] As an improved technical solution, a second flame arrester is further provided on the air intake pipe connected to the exhaust gas inlet.

[0013] As an improved technical solution, a second VOC detector is also provided at the exhaust gas inlet of the gas distribution chamber.

[0014] As a preferred technical solution, the combustible gas detector is interlocked with the igniter through a PLC control system.

[0015] Due to the adoption of the above technical solution, the beneficial effects of the utility model are:

[0016] The combustible gas detector in the gas distribution chamber of the device can accurately detect the concentration of combustible gas in the gas distribution chamber. Through the interlocking of the combustible gas detector, the second pneumatic valve and the second fan, when the combustible gas in the gas distribution chamber reaches the lower explosion limit, the second pneumatic valve is effectively cut off to prevent the exhaust gas from entering the combustion chamber. At the same time, the second fan is turned on to introduce air into the gas distribution chamber to dilute the concentration of the combustible gas, effectively preventing the explosion caused by the combustible gas concentration reaching the explosion limit and entering the combustion chamber.

[0017] The first pressure sensor and the second pressure sensor of the device can respectively detect the pressure in the gas distribution chamber and the combustion chamber. Through the interlocking of the first pressure sensor, the second pressure sensor and the first fan and the second fan, when the pressure in the combustion chamber is greater than the pressure in the gas distribution chamber, the power of the first fan is increased through the PLC control system to increase the exhaust gas conveying power. If the power of the first fan is adjusted to the maximum and the pressure in the combustion chamber is still greater than the pressure in the gas distribution chamber, the second fan is turned on to introduce air into the gas distribution chamber. The device also provides flame arresters on the pipelines in the gas distribution chamber and the combustion chamber to prevent the flame in the combustion chamber from entering the gas distribution chamber when the pressure in the combustion chamber is greater than the pressure in the gas distribution chamber, thereby improving the safety of the device.

[0018] The second VOC detector in the smoke distribution room of this device can detect the VOC content in the exhaust gas. If the VOC content does not meet the standard, the circulation valve and the back-blowing machine are opened through the PLC control system, so that the exhaust gas re-enters the first heat storage chamber for reaction, which greatly improves the exhaust gas treatment efficiency.

[0019] The flame detector in the combustion chamber of this device is interlocked with pneumatic valve three and pneumatic valve four. If the flame detector detects that the flame in the furnace is extinguished, the pneumatic valve three is closed and the pneumatic valve four is opened through the PLC control system, thereby cutting off the gas supply and allowing the exhaust gas to re-enter the gas distribution chamber. When the combustible gas detector detects that the combustible gas concentration in the gas distribution chamber is below the explosion limit, the ignition is restarted through the igniter, further improving the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0021] Figure 1 It is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0022] In the figure, 1, gas distribution chamber; 2, first heat storage chamber; 3, third heat storage chamber; 4, combustion chamber; 5, second heat storage chamber; 6, flue gas distribution chamber; 7, pneumatic valve one; 8, combustible gas detector; 9, air inlet; 10, exhaust gas inlet; 11, first fan; 12, second fan; 13, pneumatic valve two; 14, gas pipeline; 15, pneumatic valve three; 16, first circulation pipeline; 17, pneumatic valve four; 18, burner; 19, igniter; 20, flame detector; 21, first VOC detector; 22, chimney; 23, backblowing machine; 24, air inlet valve; 25, second circulation pipeline; 26, circulation valve; 27, pneumatic valve five; 28, water inlet pipe; 29, spray plate; 30, drain port; 31, first flame arrester; 32, first pressure sensor; 33, second pressure sensor; 34, second flame arrester; 35, second VOC detector. DETAILED DESCRIPTION

[0023] The present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention.

[0024] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0025] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0026] Example 1

[0027] like Figure 1 As shown, an RTO safety explosion suppression interlocking device comprises a furnace body and a PLC control system (not shown in the figure), wherein a gas distribution chamber 1, a first regenerator 2, a third regenerator 3, a combustion chamber 4, a second regenerator 5 and a flue gas distribution chamber 6 are arranged in the furnace body;

[0028] The gas distribution chamber 1 is provided with a pneumatic valve 7 on the air inlet pipe, and a plurality of combustible gas detectors 8 are provided in the gas distribution chamber 1, and the plurality of combustible gas detectors 8 are arranged in the front, middle, rear, top, bottom, left and right areas of the gas distribution chamber 1; the gas distribution chamber 1 is provided with an air inlet 9 and an exhaust gas inlet 10, and a first fan 11 is provided on the air inlet pipe connected to the exhaust gas inlet 10, and a second fan 12 is provided on the air inlet pipe connected to the air inlet 9;

[0029] A pneumatic valve 2 13 is provided on the air inlet pipe of the combustion chamber 4, and the combustion chamber 4 is also connected to a gas pipeline 14, on which a pneumatic valve 3 15 is provided. The gas outlet of the combustion chamber 4 is also connected to the gas distribution chamber 1 through a first circulation pipeline 16, on which a pneumatic valve 4 17 is provided. A burner 18 and a burner ignition system are also provided in the combustion chamber 4, and the burner ignition system includes an igniter 19 and a plurality of flame detectors 20, and the flame detectors 20 are interlocked with the pneumatic valve 3 15 and the pneumatic valve 4 17 respectively through a PLC control system, and the combustible gas detector 8 is interlocked with the igniter 19 through a PLC control system. The flame detector 20 detects whether the flame in the furnace is extinguished. If so, the signal is transmitted to the PLC control system. The PLC control system closes the pneumatic valve three 15 and opens the pneumatic valve four 17 through automatic control, cuts off the gas supply, and switches the exhaust gas to the circulation line to re-enter the gas distribution chamber 1. After the exhaust gas is detected by the combustible gas detector 8 in the gas distribution chamber 1 to find that the combustible gas concentration is below the explosion limit, the igniter 19 is started to re-ignite, thereby improving the safety of the device.

[0030] In this embodiment, the combustible gas detector 8 is interlocked with the second fan 12 and the pneumatic valve 13 through the PLC control system. The combustible gas detector 8 can monitor the concentration of the combustible gas in the gas distribution chamber 1 in real time. If the concentration of the combustible gas reaches the lower explosion limit, the signal will be transmitted to the PLC control system. The PLC control system automatically controls to close the pneumatic valve 13, stop inputting the exhaust gas into the combustion chamber 4, and open the second fan 12 at the same time, and introduce air into the gas distribution chamber 1 to dilute the exhaust gas, thereby reducing the concentration of the combustible gas in the gas distribution chamber 1, until the concentration of the combustible gas in the gas distribution chamber 1 is reduced to below the lower explosion limit, and reopen the pneumatic valve 13, the RTO device operates normally, and the safety of the device is further improved.

[0031] In this embodiment, a plurality of first VOC detectors 21 are arranged in the smoke distribution chamber 6, and the first VOC detectors 21 are distributed in the front, middle, rear, top, bottom, left and right areas of the smoke distribution chamber 6, and are arranged in three dimensions; the smoke distribution chamber 6 is also connected to a chimney 22, and a back-blowing air blower 23 and an air intake valve 24 are arranged on the pipe connected to the air inlet of the chimney 22, and the pipe connected to the air inlet of the chimney 22 is also connected to the first heat storage chamber 2 through a second circulation pipe 25, and a circulation valve 26 is arranged on the second circulation pipe 25, and the first VOC detector 21 is interlocked with the back-blowing air blower 23, the circulation valve 26 and the air intake valve 24 respectively through a PLC control system. The first VOC detector 21 detects the VOC content in the exhaust gas in the smoke distribution chamber 6. When the VOC content does not meet the emission requirements, the PLC control system automatically controls the back-blowing air 23 and the circulation valve 26 to open. Under the action of the back-blowing air 23, the exhaust gas re-enters the first heat storage chamber 2 for re-reaction until the VOC content in the exhaust gas in the smoke distribution chamber 6 reaches the requirement. Then, the air inlet valve 24 is opened and the exhaust gas enters the chimney 22 for emission. The above arrangement improves the exhaust gas treatment efficiency.

[0032] Furthermore, in this embodiment, the combustible gas detector 8 is also interlocked with the burner 18 through a PLC control system. The combustible gas detector 8 is used to monitor the concentration of the combustible gas in the gas distribution chamber 1, and the combustion efficiency of the burner 18 is effectively adjusted according to the combustible gas concentration, thereby further reducing energy consumption and ensuring the safety of the device.

[0033] Furthermore, in this embodiment, the combustible gas detector 8 is also interlocked with the pneumatic valve 5 27 through the PLC control system. When the combustible gas detector 8 detects that the concentration of the combustible gas in the gas distribution chamber 1 reaches the lower explosion limit, not only the pneumatic valve 2 13 is closed, but also the pneumatic valve 5 27 is closed to prevent the gas from entering the smoke distribution chamber 6 and the gas distribution chamber 1 at the same time, causing the pressure in the device to be out of control, thereby improving the safety of the device.

[0034] Furthermore, in this embodiment, a water spray mechanism is provided in the flue gas distribution chamber 6, and the water spray mechanism includes a water inlet pipe 28 and a spray plate 29 connected to the water inlet pipe 28, and a drain port 30 is provided at the bottom of the flue gas distribution chamber 6. The water spray mechanism can quickly cool the flue gas and remove the combustion particles entrained in the flue gas. The spray liquid after spraying is discharged through the drain port 30 and then collected. When the pH of the spray liquid reaches a certain value, the alkaline spray liquid in the previous exhaust gas treatment process is added for neutralization before being discharged.

[0035] Furthermore, in this embodiment, a first flame arrester 31 is provided on the pipeline between the gas distribution chamber 1 and the combustion chamber 4, which effectively prevents the pressure in the combustion chamber 4 from being greater than the pressure in the gas distribution chamber 1, and the flame in the combustion chamber 4 from entering the gas distribution chamber 1, thereby further improving the safety of the device.

[0036] Furthermore, in this embodiment, the gas distribution chamber 1 and the combustion chamber 4 are respectively provided with a first pressure sensor 32 and a second pressure sensor 33, and the first pressure sensor 32 and the second pressure sensor 33 are respectively interlocked with the first fan 11 and the second fan 12 through the PLC control system. The first pressure sensor 32 and the second pressure sensor 33 monitor the pressure in the gas distribution chamber 1 and the combustion chamber 4 respectively. If the pressure in the combustion chamber 4 is higher than the pressure in the gas distribution chamber 1, the PLC control system automatically increases the power of the first fan 11, and the air inlet 9 on the gas distribution chamber 1 is used as a standby pressure delivery. If the power of the first fan 11 is adjusted to the maximum, and the pressure in the gas distribution chamber 1 is still lower than the pressure in the combustion chamber 4, the second fan 12 is turned on, and air is introduced into the gas distribution chamber 1 at the same time.

[0037] Furthermore, in this embodiment, a second flame arrester 34 is also provided on the air intake pipe connected to the exhaust gas inlet 10 to prevent the flame in the furnace body from entering the air intake pipe.

[0038] Furthermore, in this embodiment, a second VOC detector 35 is also provided at the exhaust gas inlet 10 of the gas distribution chamber 1, and the VOC content before and after the exhaust gas treatment is detected by the first VOC detector 21 and the second VOC detector 35 respectively, so as to obtain the exhaust gas treatment efficiency of the device.

[0039] The working process of this device is as follows:

[0040] The exhaust gas is sucked into the gas distribution chamber 1 by the first fan 11. The combustible gas detector 8 detects that the combustible gas concentration in the gas distribution chamber 1 is within the safe range below the lower explosion limit and can react safely. Then the exhaust gas enters the first heat storage chamber 2 and the third heat storage chamber 3 for preheating. The preheated exhaust gas enters the combustion chamber 4 for oxidation and decomposition. Under the action of the combustion-supporting fuel, the organic matter contained in the exhaust gas is fully oxidized and decomposed. The generated flue gas releases heat in the second heat storage chamber 5 and is discharged into the atmosphere through the chimney 22.

[0041] The exhaust gas is sucked into the gas distribution chamber 1 by the first fan 11. The combustible gas detector 8 detects that the concentration of the combustible gas in the gas distribution chamber 1 is above the lower explosion limit and cannot react safely. In this case, the pneumatic valve 2 13 and the pneumatic valve 5 27 are closed, and the second fan 12 is opened. Air is introduced into the gas distribution chamber 1 through the air inlet 9 to dilute the exhaust gas. After the exhaust gas is diluted to a safe range below the lower explosion limit, the pneumatic valve 2 13 is opened, and the exhaust gas enters the combustion chamber 4 for oxidative decomposition. The flue gas generated by the combustion releases heat in the second heat storage chamber 5 and is discharged into the atmosphere through the chimney 22. The flue gas entering the flue gas distribution chamber 6 is tested for VOC content in the flue gas by the first VOC detector 21. When the exhaust gas after combustion meets the requirements, it is directly discharged through the chimney 22. If the VOC in the exhaust gas after combustion does not meet the requirements, the back-blowing air 23 and the circulation valve 26 are opened. Under the action of the back-blowing air 23 and the circulation valve 26, the exhaust gas returns to the first heat storage chamber 2 to react again until the VOC content in the exhaust gas meets the emission standards. The air inlet valve 24 is opened through the automatic control device, and the circulation valve 26 and the back-blowing air 23 are closed at the same time, and the exhaust gas is discharged into the atmosphere through the chimney 22.

[0042] In addition, it should be understood that after reading the contents taught in the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the claims attached to this application.

Claims

1. An RTO safety explosion suppression interlocking device, comprising a furnace body and a PLC control system, characterized in that: A gas distribution chamber, a first heat storage chamber, a combustion chamber, a second heat storage chamber and a flue gas distribution chamber are arranged in the furnace body. A pneumatic valve 1 is arranged on the air inlet pipe of the gas distribution chamber, and a pneumatic valve 2 is arranged on the air inlet pipe of the combustion chamber; an air inlet and an exhaust gas inlet are arranged on the gas distribution chamber, a first fan is arranged on the air inlet pipe connected to the exhaust gas inlet, and a second fan is arranged on the air inlet pipe connected to the air inlet; a plurality of combustible gas detectors are arranged in the gas distribution chamber, the combustion chamber is connected to a gas pipeline, a pneumatic valve 3 is arranged on the gas pipeline, the gas outlet of the combustion chamber is also connected to the gas distribution chamber through a first circulation pipeline, a pneumatic valve 4 is arranged on the first circulation pipeline, and a fuel gas is arranged inside the combustion chamber. A burner and a burner ignition system, the burner ignition system includes an igniter and multiple flame detectors, multiple first VOC detectors are arranged in the smoke distribution chamber, the smoke distribution chamber is also connected to a chimney, a back-blowing machine and an air intake valve are arranged on the pipe connected to the air inlet of the chimney, the pipe connected to the air inlet of the chimney is also connected to the first heat storage chamber through a second circulation pipe, a circulation valve is arranged on the second circulation pipe, the flame detector is interlocked with pneumatic valve three and pneumatic valve four respectively through a PLC control system, the combustible gas detector is interlocked with the second fan and pneumatic valve two respectively through a PLC control system, and the first VOC detector is interlocked with the back-blowing machine and the circulation valve respectively through a PLC control system.

2. The RTO safety explosion suppression interlocking device according to claim 1 is characterized in that: A third heat storage chamber is also arranged between the first heat storage chamber and the combustion chamber.

3. The RTO safety explosion suppression interlocking device according to claim 1 is characterized in that: The combustible gas detector is also interlocked with the burner through a PLC control system.

4. The RTO safety explosion suppression interlocking device according to claim 1 is characterized in that: A water spray mechanism is arranged in the smoke distribution chamber, and the water spray mechanism comprises a water inlet pipe and a spray plate connected with the water inlet pipe. A liquid discharge port is arranged at the bottom of the smoke distribution chamber.

5. The RTO safety explosion suppression interlocking device according to claim 1 is characterized in that: A first flame arrester is arranged on the pipeline between the gas distribution chamber and the combustion chamber.

6. The RTO safety explosion suppression interlocking device according to claim 1 is characterized in that: The gas distribution chamber and the combustion chamber are respectively provided with a first pressure sensor and a second pressure sensor, and the first pressure sensor and the second pressure sensor are respectively interlocked with the first fan and the second fan through a PLC control system.

7. The RTO safety explosion suppression interlocking device according to claim 1 is characterized in that: A pneumatic valve five is provided on the air inlet duct of the smoke distribution chamber, and the pneumatic valve five is interlocked with the combustible gas detector through a PLC control system.

8. The RTO safety explosion suppression interlocking device according to claim 1 is characterized in that: A second flame arrester is also arranged on the air intake pipe connected to the exhaust gas inlet.

9. The RTO safety explosion suppression interlocking device according to claim 1, characterized in that: A second VOC detector is also provided at the exhaust gas inlet of the gas distribution chamber.

10. The RTO safety explosion suppression interlocking device according to claim 1, characterized in that: The combustible gas detector is interlocked with the igniter through a PLC control system.

Images