Waste heat recovery equipment of molybdenum catalyst pressure leaching device

Abstract

The utility model discloses waste heat recovery equipment of a molybdenum catalyst pressure leaching device, relates to the technical field of catalyst recovery, and aims to solve the problems that waste heat in a reaction kettle is not recovered, a large amount of heat loss is caused, the practicability is low, side reaction gas in the reaction kettle is not purified, and the cost is low in the prior art. In order to solve the problems that in the prior art, side reaction gas drifts in the external environment, and environmental protection performance is poor, the pressure leaching kettle comprises an installation shell arranged on one side of a pressure leaching kettle body, and the installation shell comprises a lower shell body, a flow guide cover with a drainage hole formed in the inner wall of the bottom and an upper shell body connected to the outer wall of the top of the lower shell body through bolts; and a heat exchange mechanism is arranged on the flow guide cover. According to the pressure leaching kettle, the waste heat in the pressure leaching kettle body can be recycled, a large amount of heat is prevented from being lost, the practicability is improved, side reaction gas in the pressure leaching kettle body can be purified and adsorbed, the side reaction gas is prevented from drifting to the external environment, and the environmental protection property is improved.

Description

Technical Field

[0001] This utility model relates to the field of catalyst recovery technology, and in particular to a waste heat recovery device for a molybdenum-based catalyst pressure leaching apparatus. Background Technology

[0002] A catalyst is generally a substance that increases the reaction rate without changing the total standard Gibbs free energy change of the reaction. To ensure the stable and efficient operation of the coal chemical system, the catalyst needs to be replaced, and the waste molybdenum-based catalysts need to be recovered. Molybdenum is extracted from the waste molybdenum-based catalysts using a pressure leaching device.

[0003] A search revealed a Chinese patent (application number "202021964545.1") disclosing "a pressure leaching reactor." This pressure leaching reactor includes a pressure tank, with an outlet pressure valve slidably connected to the bottom of the pressure tank. An outlet port is provided on the side wall of the outlet pressure valve, penetrating through it. A resistance bolt is slidably connected to the side wall of the outlet pressure valve and fixedly connected to the bottom of the pressure tank. However, the above-mentioned pressure leaching reactor has the following problems during use:

[0004] 1. The waste heat inside the reactor is not recovered, resulting in a large amount of heat loss and low practicality;

[0005] 2. The side reaction gases inside the reactor were not purified, and they drifted into the external environment, resulting in poor environmental performance. Utility Model Content

[0006] This utility model provides a waste heat recovery device for a pressure leaching apparatus for molybdenum-based catalysts, which solves the problems mentioned in the prior art: the pressure leaching reactor does not recover waste heat during use, resulting in a large amount of heat loss and low practicality; and the side reaction gases in the reactor are not purified, causing them to disperse into the external environment, resulting in poor environmental performance.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A waste heat recovery device for a molybdenum-based catalyst pressure leaching apparatus includes an installation shell disposed on one side of the pressure leaching vessel body. The installation shell includes a lower shell, a flow guide shroud with drainage holes on its bottom inner wall, and an upper shell bolted to the top outer wall of the lower shell. The flow guide shroud is provided with a heat exchange mechanism, which includes a lower fixed plate bolted to the middle inner wall of the lower shell, an upper fixed plate with ventilation openings on its outer wall, several heat pipes with their lower parts passing through and bonded to the outer wall of the lower fixed plate, and a cooling fan bolted to the bottom outer wall of the upper fixed plate. The upper shell is provided with a heat dissipation mechanism, which includes an installation ring, several heat exchange plates respectively sleeved on the outer walls of several heat pipes, and several heat dissipation plates respectively fixed to the inner wall of the installation ring. A purification mechanism is provided on one side of the lower shell, which includes an installation frame bolted to the outer wall of one side of the lower shell, an activated carbon filter element embedded in the installation frame, and a fixing frame bolted to the outer wall of one side of the installation frame.

[0009] Preferably, a drain pipe is fixed on the inner wall of the bottom of the lower housing, and the flow guide is connected to the inner wall of the middle part of the lower housing by bolts.

[0010] Preferably, the upper fixing plate is bolted to the upper inner wall of the upper housing, and several heat pipes pass through and are bonded to the outer wall of the upper fixing plate.

[0011] Preferably, the mounting ring abuts against the top outer wall of the upper fixing plate, and several heat exchange plates are respectively fixed on the outer wall of the mounting ring.

[0012] Through the above scheme, the heat pipe comes into contact with the hot gas inside the pressure leaching vessel. The hot gas causes the coolant at the bottom of the heat pipe to absorb heat and liquefy. Then the steam liquefies at the top of the heat pipe, transferring the heat in the hot gas to the heat exchange plate. The heat exchange plate transfers the heat to the mounting ring and the heat dissipation plate. The cooling fan operates to transfer the heat from the heat dissipation plate back to the pressure leaching vessel.

[0013] Preferably, the top end of the pressure relief pipe of the pressure leaching vessel body is connected to an air inlet pipe via a flange, and one end of the air inlet pipe passes through and is fixed to the inner wall of the lower shell.

[0014] Preferably, a recovery pipe is fixed on the inner wall of the top of the pressure leaching vessel body, and a return pipe is connected to the top of the recovery pipe through a flange. One end of the return pipe passes through and is fixed on the inner wall of the top of the upper shell.

[0015] Preferably, a lower connecting plate is bolted to the bottom outer wall of the mounting frame, and an exhaust pipe is fixed to the top outer wall of the lower connecting plate. One end of the exhaust pipe is fixed to the inner wall of one side of the lower housing. An upper connecting plate is bolted to the top outer wall of the mounting frame. The activated carbon filter element is fitted inside the fixed frame, and the fixed frame is bolted to the outer walls of the lower connecting plate and the upper connecting plate on opposite sides.

[0016] The above scheme involves using an exhaust pipe to transport the cooled gas from the pressure leaching vessel to the mounting and fixing frames. The activated carbon filter element purifies and adsorbs the gas from the pressure leaching vessel and then discharges the purified gas into the external environment.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. The heat pipe comes into contact with the hot air inside the pressure leaching vessel. The hot air causes the coolant at the bottom of the heat pipe to absorb heat and liquefy. Subsequently, the steam liquefies at the top of the heat pipe, transferring the heat from the hot air to the heat exchange plate. The heat exchange plate then transfers the heat to the mounting ring and the heat dissipation plate. The cooling fan operates to transfer the heat from the heat dissipation plate back into the pressure leaching vessel. This process can recover residual heat inside the pressure leaching vessel, prevent excessive heat loss, and improve practicality.

[0019] 2. The exhaust pipe transports the cooled gas from the pressure leaching vessel to the mounting frame and fixing frame. The activated carbon filter element purifies and adsorbs the gas in the pressure leaching vessel and discharges the purified gas into the external environment. This process can purify and adsorb the side reaction gases in the pressure leaching vessel, preventing them from drifting into the external environment and improving environmental friendliness.

[0020] In summary, this invention can recover residual heat within the pressure leaching vessel, preventing excessive heat loss and improving practicality. It can also purify and adsorb side reaction gases within the pressure leaching vessel, preventing them from drifting into the external environment and improving environmental friendliness. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall main structure of the waste heat recovery device of the pressure leaching apparatus for molybdenum-based catalysts proposed in this utility model.

[0022] Figure 2 This is a front view cross-sectional structural diagram of the waste heat recovery equipment of a molybdenum-based catalyst pressure leaching device proposed in this utility model.

[0023] Figure 3 This is a schematic diagram of the main view of the outer casing of the waste heat recovery device of the pressure leaching apparatus for molybdenum-based catalysts proposed in this utility model.

[0024] Figure 4 This is a front view cross-sectional structural diagram of the heat exchange mechanism of a waste heat recovery device for a molybdenum-based catalyst pressure leaching apparatus proposed in this utility model.

[0025] Figure 5 This is a schematic diagram of the heat dissipation mechanism of a waste heat recovery device for a molybdenum-based catalyst pressure leaching apparatus proposed in this utility model.

[0026] Figure 6 The present utility model proposes Figure 5 Enlarged structural diagram at point A in the middle.

[0027] Figure 7 This is a schematic diagram of the main structure of the purification mechanism of the waste heat recovery equipment of the pressure leaching device for a molybdenum-based catalyst proposed in this utility model.

[0028] In the diagram: 1. Pressure leaching vessel body; 2. Mounting shell; 201. Lower shell; 202. Flow guide shroud; 203. Upper shell; 3. Heat exchange mechanism; 301. Lower fixing plate; 302. Upper fixing plate; 303. Heat pipe; 304. Cooling fan; 4. Heat dissipation mechanism; 401. Mounting ring; 402. Heat exchange plate; 403. Heat dissipation plate; 5. Air inlet pipe; 6. Return pipe; 7. Purification mechanism; 701. Mounting frame; 702. Lower connecting plate; 703. Exhaust pipe; 704. Upper connecting plate; 705. Activated carbon filter element; 706. Fixing frame. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0030] Example 1, referring to Figure 1-6A waste heat recovery device for a molybdenum-based catalyst pressure leaching apparatus includes an installation shell 2 disposed on one side of the pressure leaching vessel body 1. The installation shell 2 includes a lower shell 201, a flow guide 202 with drainage holes on its bottom inner wall, and an upper shell 203 bolted to the top outer wall of the lower shell 201. A drainage pipe is fixed on the bottom inner wall of the lower shell 201. The flow guide 202 is bolted to the middle inner wall of the lower shell 201. A heat exchange mechanism 3 is provided on the flow guide 202. The heat exchange mechanism 3 includes a lower fixed plate 301 bolted to the middle inner wall of the lower shell 201, an upper fixed plate 302 with ventilation holes on its outer wall, several heat pipes 303 with their lower parts penetrating and bonded to the outer wall of the lower fixed plate 301, and cooling fans 304 bolted to the bottom outer wall of the upper fixed plate 302. The upper fixed plate 302 is bolted to the upper inner wall of the upper shell 203. Heat pipes 303 are respectively passed through and bonded to the outer wall of the upper fixed plate 302. The upper shell 203 is provided with a heat dissipation mechanism 4. The heat dissipation mechanism 4 includes a mounting ring 401, a number of heat exchange plates 402 respectively sleeved on the outer wall of a number of heat pipes 303, and a number of heat dissipation plates 403 respectively fixed on the inner wall of the mounting ring 401. The mounting ring 401 abuts against the top outer wall of the upper fixed plate 302. The number of heat exchange plates 402 are respectively fixed on the outer wall of the mounting ring 401. The top of the pressure relief pipe of the pressure leaching vessel body 1 is connected to an air inlet pipe 5 through a flange. One end of the air inlet pipe 5 passes through and is fixed to the inner wall of the lower shell 201. A recovery pipe is fixed on the top inner wall of the pressure leaching vessel body 1. The top of the recovery pipe is connected to a return pipe 6 through a flange. One end of the return pipe 6 passes through and is fixed to the top inner wall of the upper shell 203. When the pressure inside the pressure leaching vessel body 1 is large or the temperature is high, the return pipe 6 is disconnected from the pressure leaching vessel body 1.

[0031] Example 2, refer to Figure 7 A waste heat recovery device for a molybdenum-based catalyst pressure leaching apparatus further includes a purification mechanism 7. The purification mechanism 7 includes a mounting frame 701 bolted to one side of the outer wall of the lower housing 201, an activated carbon filter element 705 embedded in the mounting frame 701, and a fixing frame 706 bolted to one side of the outer wall of the mounting frame 701. A lower connecting plate 702 is bolted to the bottom outer wall of the mounting frame 701. An exhaust pipe 703 is fixed to the top outer wall of the lower connecting plate 702. One end of the exhaust pipe 703 is fixed to one side of the inner wall of the lower housing 201. An upper connecting plate 704 is bolted to the top outer wall of the mounting frame 701. The activated carbon filter element 705 is sleeved in the fixing frame 706. The fixing frame 706 is bolted to the opposite outer walls of the lower connecting plate 702 and the upper connecting plate 704.

[0032] Working principle: The heat pipe 303 comes into contact with the hot gas inside the pressure leaching vessel body 1. The hot gas causes the coolant at the bottom of the heat pipe 303 to absorb heat and liquefy. Subsequently, the vapor liquefies at the top of the heat pipe 303, transferring the heat in the hot gas to the heat exchange plate 402. The heat exchange plate 402 transfers the heat to the mounting ring 401 and the heat dissipation plate 403. The cooling fan 304 operates to transfer the heat from the heat dissipation plate 403 back into the pressure leaching vessel body 1. The exhaust pipe 703 transports the cooled gas inside the pressure leaching vessel body 1 to the mounting frame 701 and the fixing frame 706. The activated carbon filter element 705 purifies and adsorbs the gas inside the pressure leaching vessel body 1 and discharges the purified gas into the external environment.

[0033] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A waste heat recovery device for a molybdenum-based catalyst pressure leaching apparatus, comprising a mounting shell (2) disposed on one side of the pressure leaching vessel body (1), characterized in that, The mounting housing (2) includes a lower housing (201), a flow guide (202) with drainage holes on the bottom inner wall, and an upper housing (203) that is bolted to the top outer wall of the lower housing (201); The flow guide shroud (202) is provided with a heat exchange mechanism (3), which includes a lower fixing plate (301) bolted to the inner wall of the middle part of the lower housing (201), an upper fixing plate (302) with ventilation openings on the outer wall, several heat pipes (303) with their lower parts passing through and bonded to the outer wall of the lower fixing plate (301), and a cooling fan (304) bolted to the bottom outer wall of the upper fixing plate (302). The upper housing (203) is provided with a heat dissipation mechanism (4), which includes a mounting ring (401), a plurality of heat exchange plates (402) respectively sleeved on the outer wall of a plurality of heat pipes (303), and a plurality of heat dissipation plates (403) respectively fixed on the inner wall of the mounting ring (401). The lower housing (201) is provided with a purification mechanism (7) on one side. The purification mechanism (7) includes a mounting frame (701) bolted to the outer wall of the lower housing (201), an activated carbon filter element (705) embedded in the mounting frame (701), and a fixing frame (706) bolted to the outer wall of the mounting frame (701).

2. The waste heat recovery equipment of the pressure leaching device for a molybdenum-based catalyst according to claim 1, characterized in that, A drain pipe is fixed on the bottom inner wall of the lower housing (201), and the flow guide (202) is bolted to the middle inner wall of the lower housing (201).

3. The waste heat recovery equipment of the pressure leaching device for a molybdenum-based catalyst according to claim 1, characterized in that, The upper fixing plate (302) is bolted to the upper inner wall of the upper shell (203), and several heat pipes (303) are respectively inserted and bonded to the outer wall of the upper fixing plate (302).

4. The waste heat recovery equipment of the pressure leaching device for a molybdenum-based catalyst according to claim 1, characterized in that, The mounting ring (401) abuts against the top outer wall of the upper fixing plate (302), and several heat exchange plates (402) are respectively fixed on the outer wall of the mounting ring (401).

5. The waste heat recovery equipment of the pressure leaching device for a molybdenum-based catalyst according to claim 1, characterized in that, The pressure relief pipe of the pressure leaching vessel body (1) is connected to an air inlet pipe (5) via a flange at the top end, and one end of the air inlet pipe (5) is inserted through and fixed to the inner wall of the lower shell (201).

6. The waste heat recovery equipment of the pressure leaching device for a molybdenum-based catalyst according to claim 1, characterized in that, A recovery pipe is fixed on the top inner wall of the pressure leaching vessel body (1), and a return pipe (6) is connected to the top of the recovery pipe through a flange. One end of the return pipe (6) passes through and is fixed on the top inner wall of the upper shell (203).

7. The waste heat recovery equipment of the pressure leaching device for a molybdenum-based catalyst according to claim 1, characterized in that, The mounting frame (701) has a lower connecting plate (702) bolted to its bottom outer wall, and an exhaust pipe (703) is fixed to the top outer wall of the lower connecting plate (702). One end of the exhaust pipe (703) is fixed to the inner wall of the lower housing (201). The mounting frame (701) has an upper connecting plate (704) bolted to its top outer wall. The activated carbon filter element (705) is fitted inside the fixed frame (706), and the fixed frame (706) is bolted to the outer walls of the lower connecting plate (702) and the upper connecting plate (704) on opposite sides.

Images