Two-tower type RTO system

Abstract

The utility model relates to a two-tower type RTO system which comprises a first heat storage chamber, a second heat storage chamber, a hearth, a main fan, a buffer tank and a chimney. The bottom of the first heat storage chamber is connected with a first pneumatic air inlet valve, a first pneumatic air outlet valve and a buffer tank first pneumatic air inlet valve, the bottom of the second heat storage chamber is connected with a second pneumatic air inlet valve, a second pneumatic air outlet valve and a buffer tank second pneumatic air inlet valve, and a combustor is installed on the top of the hearth. The first heat storage chamber and the second heat storage chamber are respectively communicated with the bottom of the hearth; organic waste gas is introduced into an air inlet of the main fan, and an air outlet is connected with the first pneumatic air inlet valve and the second pneumatic air inlet valve; the buffer tank is provided with three connectors, the first connector is communicated with a chimney, the second connector is connected into an air inlet of the main fan through an adjusting valve, and the third connector is connected with a first pneumatic air inlet valve of the buffer tank and a second pneumatic air inlet valve of the buffer tank. And the chimney is connected with the first pneumatic air outlet valve and the second pneumatic air outlet valve. The system does not have an exhaust emission peak value.

Description

Technical Field

[0001] The utility model relates to the technical field of incineration and purification of organic waste gas, in particular to a two-tower RTO system. Background Art

[0002] The incineration and purification of organic waste gas mainly involves keeping the VOCs gas in a high temperature environment of 760℃-900℃ for a certain period of time, so that the VOCs gas is oxidized into CO 2 and H 2 O and other inorganic components, with high purification efficiency, can oxidize almost all VOCs gas. In view of the above advantages of organic waste gas incineration purification technology, the incineration treatment method of organic waste gas has been widely used, and the most common application is the thermal storage incineration technology, which can transfer the heat of the exhaust gas after incineration to the thermal storage ceramic to preheat the newly entered VOCs gas, so as to achieve the purpose of saving energy consumption.

[0003] Currently, common thermal storage incineration equipment includes three-chamber RTO and two-tower RTO. The three-chamber RTO has three thermal storage chambers. The three thermal storage chambers cyclically circulate exhaust gas in and out, which requires more thermal storage ceramics to be loaded, and a purge fan must be configured to provide purge gas. The processing load and floor space of the entire incineration system are large, and the outer surface is easy to dissipate heat and cause heat loss. Although the two-tower RTO has the advantages of low investment and low heat loss due to only two thermal storage chambers, there will be emission peaks when the two thermal storage chambers are periodically switched in and out of the exhaust gas, resulting in the exhaust gas discharged not meeting the standards, and the purification efficiency is also lower than that of the three-chamber RTO. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a two-tower RTO system without exhaust gas emission peak.

[0005] The utility model adopts the following technical solutions:

[0006] The utility model provides a two-tower RTO system, including an RTO body, a main fan, a buffer tank and a chimney;

[0007] The RTO body includes a first regenerator, a second regenerator and a furnace. The bottom of the first regenerator is connected to a first pneumatic air inlet valve, a first pneumatic air outlet valve and a first pneumatic air inlet valve of a buffer tank. The bottom of the second regenerator is connected to a second pneumatic air inlet valve, a second pneumatic air outlet valve and a second pneumatic air inlet valve of a buffer tank. A burner is installed on the top of the furnace. The first regenerator and the second regenerator are respectively connected to the bottom of the furnace.

[0008] The air inlet of the main fan is connected to the organic waste gas, and the air outlet is connected to the first pneumatic air inlet valve and the second pneumatic air inlet valve;

[0009] The buffer tank is provided with three interfaces, the first interface is connected to the chimney, the second interface is connected to the air inlet of the main fan through the regulating valve, and the third interface is connected to the first pneumatic air inlet valve of the buffer tank and the second pneumatic air inlet valve of the buffer tank;

[0010] The chimney is connected with the first pneumatic air outlet valve and the second pneumatic air outlet valve.

[0011] Preferably, both the first heat storage chamber and the second heat storage chamber are filled with honeycomb-shaped ceramic heat storage bodies.

[0012] Preferably, the buffer tank is hollow inside and has a plurality of baffles arranged at intervals.

[0013] Preferably, it also includes a control subsystem, which simultaneously controls the first pneumatic air inlet valve, the first pneumatic air outlet valve, the first pneumatic air inlet valve of the buffer tank, the second pneumatic air inlet valve, the second pneumatic air outlet valve, the second pneumatic air inlet valve of the buffer tank, the burner, the main fan and the regulating valve.

[0014] Preferably, the control subsystem is a PLC or a DCS.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] Taking the air intake of the first heat storage chamber and the air outlet of the second heat storage chamber as an example of the initial working state (at this time the first pneumatic air intake valve and the second pneumatic air outlet valve are in the open state), when the two-tower RTO system of the utility model needs to switch the exhaust gas in and out, the first pneumatic air intake valve and the second pneumatic air outlet valve can be closed first, and the second pneumatic air intake valve and the first pneumatic air intake valve of the buffer tank can be opened, so that the organic waste gas remaining at the bottom of the first heat storage chamber is input into the buffer tank under the drive of the main fan, and then the first pneumatic air intake valve of the buffer tank is closed, and the first pneumatic air outlet valve is opened. Part of the organic waste gas stored in the buffer tank is also re-merged into the organic waste gas under the action of negative pressure suction and enters the furnace for purification, thereby avoiding the occurrence of exhaust gas emission peaks and ensuring that the exhaust gas emissions meet the standards. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a two-tower RTO system in an embodiment of the utility model.

[0018] The reference numerals are described as follows:

[0019] 1. RTO body 5. First pneumatic intake valve

[0020] 101, first heat storage chamber 6, first pneumatic outlet valve

[0021] 102, second heat storage chamber 7, first pneumatic air inlet valve of buffer tank

[0022] 103. Furnace 8. Second pneumatic air inlet valve

[0023] 2. Main fan 9. Second pneumatic outlet valve

[0024] 3. Buffer tank 10. Buffer tank second pneumatic air inlet valve

[0025] 301, baffle 11, burner

[0026] 4. Chimney 12. Regulating valve DETAILED DESCRIPTION

[0027] The following is a further detailed description of the specific implementations of the present invention in conjunction with the accompanying drawings. These implementations are only used to illustrate the present invention, but not to limit the present invention.

[0028] In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In addition, in the description of the present invention, unless otherwise specified, “plurality” means two or more.

[0031] See also Figure 1 , this embodiment provides a two-tower RTO system, including an RTO body 1, a main fan 2, a buffer tank 3 and a chimney 4;

[0032] The RTO body 1 includes a first regenerator 101, a second regenerator 102 and a furnace 103. The bottom of the first regenerator 101 is connected to a first pneumatic air inlet valve 5, a first pneumatic air outlet valve 6 and a first pneumatic air inlet valve 7 of a buffer tank. The bottom of the second regenerator 102 is connected to a second pneumatic air inlet valve 8, a second pneumatic air outlet valve 9 and a second pneumatic air inlet valve 10 of a buffer tank. A burner 11 is installed on the top of the furnace 103. The first regenerator 101 and the second regenerator 102 are respectively connected to the bottom of the furnace 103.

[0033] The air inlet of the main fan 2 is connected to the organic waste gas, and the air outlet is connected to the first pneumatic air inlet valve 5 and the second pneumatic air inlet valve 8;

[0034] The buffer tank 3 is provided with three interfaces, the first interface is connected to the chimney 4, the second interface is connected to the air inlet of the main fan 2 through the regulating valve 12, and the third interface is connected to the first pneumatic air inlet valve 7 and the second pneumatic air inlet valve 10 of the buffer tank;

[0035] The chimney 4 is connected to the first pneumatic air outlet valve 6 and the second pneumatic air outlet valve 9 .

[0036] It should be noted that the above-mentioned components are combined into a complete whole by corresponding pipelines and instruments.

[0037] See also Figure 1 In the two-tower RTO system of this embodiment, the first regenerator 101 is used as an example of the initial working state where air enters and air is discharged from the second regenerator 102 (at this time, the first pneumatic air inlet valve 5 and the second pneumatic air outlet valve 9 are in the open state). The organic waste gas is powered by the main fan 2 and passes through the first pneumatic air inlet valve 5 and the first regenerator 101 in sequence. The organic waste gas can absorb the heat stored in the first regenerator 101 in the previous cycle and enter the furnace 103. If the temperature in the furnace 103 is insufficient, the burner 11 is started to heat the furnace 103 to supplement the heat, and the temperature of the furnace 103 is maintained at 760°C-850°C, so that the organic waste gas is cracked into harmless substances in the furnace 103, and the purified exhaust gas flows through the second regenerator 102 and releases heat to heat the second regenerator 102, and then flows through the second pneumatic air outlet valve 9 and is discharged to the outside through the chimney 4 in compliance with the standards.

[0038] See also Figure 1, still taking the first regenerator 101 as the initial working state and the second regenerator 102 as the gas outlet (at this time, the first pneumatic inlet valve 5 and the second pneumatic outlet valve 9 are in the open state), when the two-tower RTO system of this embodiment reaches the switching cycle and needs to switch the exhaust gas in and out, the regulating valve 12 is opened first, so that part of the clean gas in the chimney 4 is continuously sucked into the main fan 2 to avoid temporary pressure fluctuations during subsequent switching, and then the first pneumatic inlet valve 5 and the second pneumatic outlet valve 9 are closed, and the second pneumatic inlet valve 8 and the first pneumatic inlet valve 7 of the buffer tank are opened, so that the organic waste gas remaining at the bottom of the first regenerator 101 is input into the buffer tank 3 under the drive of the main fan 2, and then the first pneumatic inlet valve 7 of the buffer tank is closed, and the first pneumatic outlet valve 6 is opened, and part of the organic waste gas stored in the buffer tank 3 is also re-merged into the organic waste gas under the action of negative pressure suction and enters the furnace 103 for purification, thereby avoiding the occurrence of waste gas emission peaks and ensuring that the waste gas meets the emission standards.

[0039] Preferably, the first heat storage chamber 101 and the second heat storage chamber 102 are both filled with honeycomb-shaped ceramic heat storage bodies.

[0040] Preferably, see Figure 1 The buffer tank 3 is hollow inside and is provided with a plurality of baffles 301 at intervals, so that the direction of the airflow inside the buffer tank 3 can be controlled by the baffles 301 .

[0041] Preferably, the two-tower RTO system of this embodiment further includes a control subsystem, which simultaneously controls the first pneumatic air inlet valve 5, the first pneumatic air outlet valve 6, the first pneumatic air inlet valve 7 of the buffer tank, the second pneumatic air inlet valve 8, the second pneumatic air outlet valve 9, the second pneumatic air inlet valve 10 of the buffer tank, the burner 11, the main fan 2 and the regulating valve 12. Compared with the three-chamber RTO, the two-tower RTO system of this embodiment reduces the purge air system, making the system simpler and smoother, and easy to automatically control, so that it can be fully automatically controlled through the control subsystem, reducing manual operations and reducing labor costs.

[0042] It should be noted that the time frequency of the control subsystem controlling the switching of the valve is in a certain proportional relationship with the spatial volume of the lower end of the heat storage body in the heat storage chamber.

[0043] Preferably, the control subsystem is a PLC or a DCS.

[0044] The two-tower RTO system of this embodiment optimizes the process equipment parameters of the two-tower RTO in view of the respective advantages and disadvantages of the three-chamber RTO and the two-tower RTO, and has the advantages of simple operation, low equipment investment, low heat loss, and no exhaust gas emission peak. It can also reduce the system's footprint, has periodic heat absorption and heat release functions, and the system operates stably.

[0045] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. A two-tower RTO system, characterized in that: It includes an RTO body (1), a main fan (2), a buffer tank (3) and a chimney (4); The RTO body (1) comprises a first heat storage chamber (101), a second heat storage chamber (102) and a furnace (103); the bottom of the first heat storage chamber (101) is connected to a first pneumatic air inlet valve (5), a first pneumatic air outlet valve (6) and a first pneumatic air inlet valve (7) of a buffer tank; the bottom of the second heat storage chamber (102) is connected to a second pneumatic air inlet valve (8), a second pneumatic air outlet valve (9) and a second pneumatic air inlet valve (10) of a buffer tank; a burner (11) is installed on the top of the furnace (103); the first heat storage chamber (101) and the second heat storage chamber (102) are respectively connected to the bottom of the furnace (103); the organic waste gas is introduced into the air inlet of the main fan (2), and the air outlet is connected to the first pneumatic air inlet valve (5) and the second pneumatic air inlet valve (8); The buffer tank (3) is provided with three interfaces, the first interface is connected to the chimney (4), the second interface is connected to the air inlet of the main fan (2) through a regulating valve (12), and the third interface is connected to the first pneumatic air inlet valve (7) of the buffer tank and the second pneumatic air inlet valve (10) of the buffer tank; The chimney (4) is connected to the first pneumatic air outlet valve (6) and the second pneumatic air outlet valve (9).

2. The two-tower RTO system according to claim 1, characterized in that: The first heat storage chamber (101) and the second heat storage chamber (102) are both filled with honeycomb-shaped ceramic heat storage bodies.

3. The two-tower RTO system according to claim 1, characterized in that: The buffer tank (3) is hollow inside and has a plurality of baffles (301) arranged at intervals.

4. The two-tower RTO system according to claim 1, characterized in that: The invention also includes a control subsystem, which simultaneously controls the first pneumatic air inlet valve (5), the first pneumatic air outlet valve (6), the first pneumatic air inlet valve (7) of the buffer tank, the second pneumatic air inlet valve (8), the second pneumatic air outlet valve (9), the second pneumatic air inlet valve (10) of the buffer tank, the burner (11), the main fan (2) and the regulating valve (12).

5. The two-tower RTO system according to claim 4, characterized in that: The control subsystem is PLC or DCS.

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