Gas-gas heat exchange device based on rotary kiln

Abstract

The utility model belongs to the technical field of vanadium pentoxide production, and discloses a gas-gas heat exchange device based on a rotary kiln, which comprises a heat exchange cavity and an air cannon, a heat exchange plate is arranged in the heat exchange cavity and divides the heat exchange cavity into a first cavity and a second cavity, the first cavity is provided with a barrier plate, the barrier plate divides the first cavity into two small cavities, and the air cannon is arranged in the first cavity. The small cavity is provided with an air inlet and a first air outlet; a first sealing door is arranged on the cavity wall of the second cavity; the outlet end of the air cannon is connected with the second cavity, the inlet end of the air cannon is connected with a dust removal cavity which is connected with the tail gas outlet end of the rotary kiln, and the second cavity is provided with a second gas outlet. Two kinds of gas can be heated at the same time through the two small cavities, tail gas is subjected to dust removal through the dust removal cavity before entering the air cannon, then the tail gas enters the second cavity through the air cannon, remaining dust residues are prevented from remaining in the second cavity, and the influence on the heat exchange efficiency is avoided; and the interior of the second cavity can be cleaned by opening the first sealing door, and dust residue is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of vanadium pentoxide production, in particular to a gas-to-gas heat exchange device based on a rotary kiln. Background Art

[0002] The rotary kiln is an important equipment in the production of vanadium pentoxide. When the rotary kiln is in use, a large amount of high-temperature tail gas is generated. In the prior art, the hot gas is usually subjected to heat exchange treatment so that it can be recycled to achieve the purpose of saving resources.

[0003] However, the exhaust gas from the rotary kiln contains a large amount of dust, which can easily cause blockage inside the heat exchanger and is difficult to clean, thus affecting the efficiency of heat exchange. Utility Model Content

[0004] The utility model aims to provide a gas-to-gas heat exchange device based on a rotary kiln, which can reduce the possibility of blockage on the one hand, and can also facilitate cleaning of the inside of the heat exchanger on the other hand to ensure heat exchange efficiency.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The gas-to-gas heat exchange device based on the rotary kiln comprises:

[0007] A heat exchange cavity, wherein a heat exchange plate is arranged in the heat exchange cavity, wherein the heat exchange plate divides the heat exchange cavity into a first cavity and a second cavity, wherein the first cavity is provided with a baffle plate, wherein the baffle plate divides the first cavity into two small cavities, wherein both small cavities have an air inlet and a first air outlet, wherein the two air inlets are respectively connected to a combustion-supporting gas supply device and an air supply device; and a first sealing door which can be opened and closed is arranged on the cavity wall of the second cavity;

[0008] An air cannon, wherein the outlet end of the air cannon is connected to the second cavity, the inlet end of the air cannon is connected to a dust removal cavity, the dust removal cavity is connected to the tail gas outlet end of the rotary kiln, and the second cavity is provided with a second air outlet.

[0009] Preferably, the dust removal chamber is provided with a second sealing door that can be opened or closed, and a plurality of dust removal nets are provided in the dust removal chamber, and the plurality of dust removal nets are distributed at intervals along the flow direction of the gas.

[0010] Preferably, the dust removal net is plugged into the dust removal cavity.

[0011] Preferably, sealing rings are provided between the second sealing door and the dust removal chamber, and between the first sealing door and the heat exchange chamber.

[0012] Preferably, the small cavity and the second cavity are both provided with temperature monitoring components.

[0013] Preferably, the heat exchange plate is corrugated.

[0014] Preferably, flow valves are provided between the air cannon and the dust removal chamber, between the small chamber and the gas supply device, and between the small chamber and the air supply device.

[0015] Preferably, the first air outlet and the second air outlet are both provided with a check valve.

[0016] Preferably, a plurality of supporting feet are arranged on the outer side of the heat exchange cavity, and a connecting plate is arranged on the supporting feet.

[0017] Preferably, the first cavity and the second cavity are both coated with an anti-rust paint layer.

[0018] Beneficial effects of the utility model:

[0019] The combustion-supporting gas and air can be injected separately through the small cavity, so that the two gases can be heated at the same time. On this basis, the exhaust gas passes through the dust removal cavity for dust removal before entering the air cannon, and then enters the second cavity through the air cannon, so as to avoid the remaining dust residue in the second cavity and avoid affecting the heat exchange efficiency; and the second cavity is cleaned by opening the first sealing door to avoid dust residue residue. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the gas-to-gas heat exchange device based on the rotary kiln of the utility model.

[0021] In the figure:

[0022] 1. First chamber; 11. Air inlet; 2. Second chamber; 21. Second air outlet; 3. Heat exchange plate; 4. Blocking plate; 5. First sealing door; 6. Air cannon; 7. Dust removal chamber; 71. Dust removal net; 72. Second sealing door; 8. Flow valve; 9. Support foot; 10. Temperature monitoring component. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0024] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0025] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0026] In the description of this embodiment, the terms "upper", "lower", "left", "right", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of description and simplified operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0027] like Figure 1 As shown, the utility model provides an air-to-air heat exchange device based on a rotary kiln, which includes a heat exchange cavity and an air cannon 6, a heat exchange plate 3 is arranged in the heat exchange cavity, the heat exchange plate 3 divides the heat exchange cavity into a first cavity 1 and a second cavity 2, the first cavity 1 is provided with a baffle plate 4, the baffle plate 4 divides the first cavity 1 into two small cavities, both of the two small cavities have an air inlet 11, so as to be able to be connected to a combustion-supporting gas supply device and an air supply device respectively, and both of the two small cavities also have a first air outlet; a first sealing door 5 that can be opened and closed is arranged on the cavity wall of the second cavity 2; the outlet end of the air cannon 6 is connected to the second cavity 2, the inlet end of the air cannon 6 is connected to the dust removal cavity 7, the dust removal cavity 7 is connected to the exhaust gas outlet end of the rotary kiln, and the second cavity 2 is provided with a second air outlet 21.

[0028] The combustion-supporting gas and air can be injected separately through the small cavity, so that the two gases can be heated at the same time. On this basis, the exhaust gas passes through the dust removal cavity 7 for dust removal before entering the air cannon 6, and then enters the second cavity 2 through the air cannon 6, so as to avoid the remaining dust residue in the second cavity 2 and avoid affecting the heat exchange efficiency; and the second cavity 2 can be cleaned by opening the first sealing door 5 to avoid dust residue residue.

[0029] like Figure 1 As shown, in some embodiments, a plurality of dust removal nets 71 are arranged in the dust removal chamber 7, and the plurality of dust removal nets 71 are spaced apart along the flow direction of the gas, so that the sediment in the gas is filtered for the first time through the dust removal nets 71; and a second sealing door 72 that can be opened is arranged on the dust removal chamber 7, so that the dust filtered by the dust removal chamber 7 is removed by opening the second sealing door 72, and the accumulation of sediment in the dust removal chamber 7 is avoided to reduce the influence on the filtration. Furthermore, a slot is arranged in the dust removal chamber 7, and the dust removal net 71 is plugged into the dust removal chamber 7 through the slot, so as to facilitate installation and replacement. In order to adjust the amount of exhaust gas entering, a flow valve 8 is arranged between the air cannon 6 and the dust removal chamber 7. Similarly, in order to adjust the discharge amount of the combustion-supporting gas and the air after the heat exchange, a flow valve 8 is also arranged between the small chamber and the gas supply device, and between the small chamber and the air supply device.

[0030] It should be noted that, in order to ensure the sealing of the second sealing door 72 and the first sealing door 5 and prevent gas from leaking out, sealing rings are provided between the second sealing door 72 and the dust removal chamber 7, and between the first sealing door 5 and the second chamber 2, and the type of the sealing ring is not specifically limited. For example, a high temperature resistant rubber sealing ring can be used.

[0031] In some embodiments, the heat exchange plate 3 preferably adopts a corrugated plate, so as to improve the heat exchange efficiency compared with a flat plate. In order to monitor the internal heat exchange temperature in real time, the two small chambers and the second chamber 2 are provided with a temperature monitoring component 10 to understand the temperature in the three chambers in real time. Exemplarily, the temperature monitoring component 10 is plugged into the cavity wall of the heat exchange cavity, so that the monitoring end of the temperature monitoring component 10 is placed in the cavity.

[0032] In some embodiments, in order to prevent the high-temperature steam brought in by the gas during the heat exchange process from corroding the heat exchange cavity, the inner sides of the first cavity 1 and the second cavity 2 are coated with an anti-rust paint layer to ensure further stability of the heat exchange.

[0033] In some embodiments, the first gas outlet is connected to the external furnace body, and the second gas outlet 21 can be connected to the exhaust pipe to discharge the cooled exhaust gas. In order to avoid backflow, a check valve is provided on the first gas outlet and the second gas outlet 21. The check valve is a prior art and will not be described in detail.

[0034] In some embodiments, in order to ensure the stability of the entire device, a plurality of support legs 9 are provided on the outside of the heat exchange cavity, and the support legs 9 have connecting plates, so as to be connected to an external fixed position through the connecting plates; for example, by pre-embedding or welding the connecting plates for connection and fixation, the stability of the heat exchange cavity is maintained.

[0035] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. A gas-to-gas heat exchange device based on a rotary kiln, characterized in that: include: A heat exchange cavity, wherein a heat exchange plate (3) is arranged in the heat exchange cavity, and the heat exchange plate (3) divides the heat exchange cavity into a first cavity (1) and a second cavity (2); the first cavity (1) is provided with a baffle plate (4), and the baffle plate (4) divides the first cavity (1) into two small cavities, and the two small cavities each have an air inlet (11) and a first air outlet, and the two air inlets (11) are respectively connected to a combustion-supporting gas supply device and an air supply device; and a first sealing door (5) capable of being opened and closed is arranged on the cavity wall of the second cavity (2); An air cannon (6), wherein the outlet end of the air cannon (6) is connected to the second chamber (2), the inlet end of the air cannon (6) is connected to a dust removal chamber (7), the dust removal chamber (7) is connected to the tail gas outlet end of the rotary kiln, and the second chamber (2) is provided with a second air outlet (21).

2. The gas-to-gas heat exchange device based on a rotary kiln according to claim 1, characterized in that: The dust removal chamber (7) is provided with a second sealing door (72) that can be opened or closed. A plurality of dust removal nets (71) are provided in the dust removal chamber (7), and the plurality of dust removal nets (71) are distributed at intervals along the flow direction of the gas.

3. The gas-to-gas heat exchange device based on a rotary kiln according to claim 2, characterized in that: The dust removal net (71) is plugged into the dust removal cavity (7).

4. The gas-to-gas heat exchange device based on a rotary kiln according to claim 2, characterized in that: Sealing rings are provided between the second sealing door (72) and the dust removal chamber (7), and between the first sealing door (5) and the second chamber (2).

5. The gas-to-gas heat exchange device based on a rotary kiln according to claim 1, characterized in that: The small cavity and the second cavity (2) are both provided with a temperature monitoring component (10).

6. The gas-to-gas heat exchange device based on a rotary kiln according to claim 1, characterized in that: The heat exchange plate (3) is wavy in shape.

7. The gas-to-gas heat exchange device based on a rotary kiln according to claim 1, characterized in that: Flow valves (8) are provided between the air cannon (6) and the dust removal chamber (7), between the small chamber and the gas supply device, and between the small chamber and the air supply device.

8. The gas-to-gas heat exchange device based on a rotary kiln according to claim 1, characterized in that: Both the first air outlet and the second air outlet (21) are provided with a check valve.

9. The gas-to-gas heat exchange device based on a rotary kiln according to claim 1, characterized in that: A plurality of support legs (9) are arranged on the outer side of the heat exchange cavity, and a connecting plate is arranged on the support legs (9).

10. The gas-to-gas heat exchange device based on a rotary kiln according to claim 1, characterized in that: The first cavity (1) and the second cavity (2) are both coated with an anti-rust paint layer.

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