Waste heat recovery structure of arsenic oxide conversion chamber

Abstract

The utility model relates to a waste heat recovery structure of an arsenic oxide conversion chamber. The waste heat recovery structure comprises a heat absorption module, a flow guide plate, an exhaust fan, a first heat insulation felt plate and a second heat insulation felt plate, the first heat insulation felt board is fixed to the wall of the conversion chamber, a plurality of heat absorption modules are fixed to the first heat insulation felt board at intervals, and the adjacent heat absorption modules are fixedly connected through connecting pieces to form a heat absorption channel. Two ports of the heat absorption passage are respectively connected with the wastewater pool and the evaporation and concentration equipment; a plurality of groups of flow guide plates are arranged and are vertically fixed between two adjacent heat absorption modules respectively, and avoiding holes are formed in the flow guide plates; the second heat insulation felt plates are fixed in front of the first heat insulation felt plates at intervals, and form a plurality of flow guide chambers together with the first heat insulation felt plates and the flow guide plates; flow guide openings are formed in the flow guide plate, communicate the multiple flow guide chambers and are alternately formed up and down; the exhaust fan is fixed in an air inlet in the second heat insulation felt plate; and an air outlet is formed below the second heat insulation felt plate and is communicated with the conversion chamber.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat recovery in a conversion chamber, and in particular to a waste heat recovery structure of an arsenic oxide conversion chamber. Background Art

[0002] When preparing arsenic oxide, a direct method, namely, an oxidative roasting method, can be adopted. After the realgar ore is crushed to a particle size of less than 3 mm, it is sent to a roasting furnace and air is introduced to carry out oxidative roasting at about 550°C. The generated furnace gas containing arsenic dust is subjected to dust removal, condensation, gravity sedimentation, cooling and crystallization at 220-250°C, and then electrostatic precipitator. The obtained solid arsenic trioxide is classified and air-selected to obtain the finished arsenic trioxide product.

[0003] When a roasting furnace is used for oxidation roasting in the conversion chamber, a large amount of heat energy will be generated, and most of the heat energy cannot be well recycled and is wasted, which in disguise increases the preparation cost. In the whole process of arsenic oxide preparation technology, a large amount of waste water will be generated, and the waste water needs to be evaporated and concentrated at the end, which requires a large amount of heat energy supply during evaporation and concentration. If the waste heat generated during oxidation roasting can be combined with evaporation and concentration, it can not only increase the utilization efficiency of heat in the conversion chamber, but also reduce the heat energy supply required for evaporation and concentration, save preparation costs, and have good economic benefits.

[0004] Based on this, it is necessary to study a waste heat recovery structure for the arsenic oxide conversion chamber. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a waste heat recovery structure for an arsenic oxide conversion chamber, which effectively solves the problem of resource waste caused by the roasting furnace being able to generate a large amount of waste heat during oxidation roasting but being unable to utilize it.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a waste heat recovery structure of an arsenic oxide conversion chamber, characterized in that it includes: a heat absorption module, a guide plate, an exhaust fan, a first insulation felt board and a second insulation felt board;

[0007] The first heat-insulating felt board is fixed on the wall of the conversion chamber, and a plurality of groups of heat-absorbing modules are fixed transversely and spaced apart on the first heat-insulating felt board, and adjacent heat-absorbing modules are fixedly connected by connecting pieces to form a heat-absorbing passage;

[0008] The two ends of the heat absorption passage extend out of the conversion chamber respectively, one end of which is connected to the wastewater tank and the other end is connected to the evaporation concentration equipment;

[0009] The guide plates are arranged in multiple groups and are respectively fixed vertically at the joints of two adjacent heat absorption modules. Avoidance holes for avoiding the connecting parts are opened on the guide plates.

[0010] The second heat-insulating felt plate is detachably fixed in front of the first heat-insulating felt plate, and is closely pressed against the guide plate, and together with the first heat-insulating felt plate and the guide plate, forms a plurality of guide chambers;

[0011] The guide plate is provided with guide ports to connect the multiple guide chambers, and the guide ports are alternately provided up and down;

[0012] An air inlet is provided above the second thermal insulation felt board;

[0013] The exhaust fan is fixed in the air inlet;

[0014] An air outlet is provided below the second heat-insulating felt board and is communicated with the conversion chamber.

[0015] Furthermore, the heat absorption module includes a heat absorption tube and a fixing plate. The heat absorption tube is arranged on the fixing plate in a circuitous manner. A plurality of fixing holes are provided on the fixing plate, and the heat absorption tube is fixed to the first insulation felt plate by screws.

[0016] Furthermore, a water pump is arranged between the wastewater tank and the heat absorption passage.

[0017] Furthermore, heat insulation panels are fixed on the remaining walls of the conversion chamber.

[0018] Furthermore, a water inlet is provided on the wastewater pool.

[0019] The beneficial effects of the above technical solution are:

[0020] The utility model forms a whole heat absorption passage by fixing a first heat insulation felt board on the wall of the conversion chamber, fixing a plurality of groups of heat absorption modules at intervals on the first heat insulation felt board, and connecting the plurality of groups of heat absorption modules through connecting pieces. The two ends of the heat absorption passage extend out of the conversion chamber respectively, and one end is connected to the wastewater pool, and the other end is connected to the evaporation concentration device. A water pump arranged between the wastewater pool and the heat absorption passage can guide the wastewater in the wastewater pool into the heat absorption passage and pressurize the wastewater so that the wastewater flows through the heat absorption passage and is discharged into the evaporation concentration device. When the wastewater flows through the heat absorption passage, it can absorb the heat in the conversion chamber and heat the wastewater, so that only a small amount of heat energy is required to evaporate and concentrate when entering the evaporation concentration device.

[0021] A guide plate is arranged between every two heat absorption modules, and a second insulation felt plate is arranged in front of the first insulation felt plate. The first insulation felt plate, the second insulation felt plate and the guide plate form a plurality of guide chambers. Guide ports are opened on the guide plate to connect the plurality of guide chambers, and the guide ports are opened alternately up and down to increase the flow distance of the gas in the guide chamber. Therefore, the waste heat energy can be fully utilized to heat the wastewater in the heat absorption passage, thereby increasing the utilization efficiency of the waste heat energy.

[0022] An air inlet is opened on the second insulation felt board, and an exhaust fan is arranged in the air inlet. The exhaust fan sends the hot air above the conversion chamber into the guide chamber. The hot air heats the wastewater and lowers its temperature. The wastewater is then discharged into the conversion chamber through the air outlet and is heated again by the heat emitted by the roasting furnace. This process is repeated, which can maximize the utilization efficiency of waste heat energy, reduce the heat required for evaporation and concentration, reduce the preparation cost, and have good economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the utility model;

[0024] Figure 2 It is a side sectional view of the utility model;

[0025] Figure 3 It is a front cross-sectional view of the utility model;

[0026] Figure 4 This is a schematic diagram of the heat absorption module layout of the utility model;

[0027] Figure 5 It is a schematic diagram of the structure of the heat absorption module of the utility model.

[0028] Figure numerals: 1 is a conversion chamber, 2 is a heat absorption module, 201 is a fixing plate, 202 is a heat absorption tube, 203 is a tube clamp, 204 is a fixing hole, 3 is a connecting piece, 4 is a first insulation felt board, 5 is a second insulation felt board, 6 is a guide plate, 601 is a guide port, 7 is an exhaust fan, 8 is an air outlet, 9 is a roasting furnace, 10 is a wastewater pool, 1001 is a water inlet, 11 is a water pump, and 12 is an evaporation concentration device. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below with reference to the accompanying drawings and specific implementation methods:

[0030] Example 1. This embodiment aims to provide a waste heat recovery structure for an arsenic oxide conversion chamber, which is mainly used to recycle the waste heat generated during oxidative roasting. In order to solve the problem that a large amount of waste heat can be generated by the roasting furnace during oxidative roasting but cannot be utilized, resulting in waste of resources, this embodiment provides a waste heat recovery structure for an arsenic oxide conversion chamber.

[0031] like Figure 1-5 As shown in the figure, a waste heat recovery structure of an arsenic oxide conversion chamber includes: a heat absorption module 2, a guide plate 6, an exhaust fan 7, a first insulation felt board 4 and a second insulation felt board 5; the first insulation felt board 4 is fixed on a wall of the conversion chamber 1, and three groups of heat absorption modules 2 are fixed on the first insulation felt board 4 with horizontal intervals, and every two heat absorption modules 2 are fixedly connected by a connecting piece 3, and there is a gap between every two heat absorption modules 2.

[0032] The heat absorption module 2 includes a fixing plate 201 and a heat absorption tube 202. The heat absorption tube 202 is arranged on the fixing plate 201 in a circuitous manner through a tube clamp 203. A fixing hole 204 is opened on the fixing plate. The heat absorption module 2 is fixed to the first insulation felt board 4 by applying bolts in the fixing hole 204. Multiple heat absorption tubes 202 are connected by joints or elbows to form a whole heat absorption passage. The two ends of the heat absorption passage extend out of the conversion chamber 1 respectively, and one end is connected to the wastewater tank 10, and the other end is connected to the evaporation concentration equipment 12. A water pump 11 is arranged between the wastewater tank 10 and the heat absorption passage. The water pump 11 can guide the wastewater in the wastewater tank 10 into the heat absorption passage and pressurize the wastewater so that the wastewater flows through the heat absorption passage and is discharged into the evaporation concentration equipment 12. When the wastewater flows through the heat absorption passage, it can absorb the heat in the conversion chamber 1 and heat the wastewater, thereby reducing the heat energy demand when entering the evaporation concentration equipment 12.

[0033] A vertical guide plate 6 is arranged between every two heat absorption modules 2, and an avoidance hole for avoiding the connecting piece 3 is opened on the guide plate 6. A second insulation felt plate 5 is fixed in front of the first insulation felt plate 4, and the second insulation felt plate 5 is tightly against the guide plate 6. The first insulation felt plate 4, the second insulation felt plate 5 and the guide plate 6 together form three guide chambers. A guide port 601 is opened on the guide plate 6 to connect the three guide chambers, and the guide port 601 should be opened alternately up and down to increase the travel of hot air in the guide chamber, make full use of waste heat energy to heat the wastewater in the heat absorption passage, and increase the utilization efficiency of waste heat energy.

[0034] An air inlet connected to the guide chamber is opened at the upper end of the second insulation felt plate 5, an exhaust fan 7 is installed in the air inlet, and an air outlet 8 is opened at the lower end of the second insulation felt plate 5, the air outlet 8 is connected to the conversion chamber 1, and the air outlet 8 and the air inlet are respectively located on both sides of the second insulation felt plate 5; the heat emitted by the roasting furnace 9 converts the air into hot air, and the exhaust fan 7 sends the hot air into the guide chamber. The hot air moves in the guide chamber and fully heats the waste water in the heat absorption passage, and then enters the conversion chamber 1 again from the air outlet 8 for heating, and this reciprocating cycle is repeated.

[0035] In order to reduce the heat absorption of the wall, insulation panels are also fixed on the other walls of the conversion chamber 1 to reduce heat waste and loss. A water inlet 1001 is opened on the wastewater pool 10. The wastewater generated by the process preparation is stored in the wastewater pool through the water inlet 1001 and waits for treatment.

[0036] Specific usage: When arsenic oxide is prepared by oxidation roasting, turn on the water pump 11 to inject the wastewater in the wastewater pool 10 into the heat absorption passage, and turn on the exhaust fan 7 at the same time to send the hot air in the conversion chamber 1 into the guide chamber. Since the guide ports 601 are opened alternately up and down, the hot air needs a longer distance to reach the air outlet 8, so the thermal energy of the hot air can be fully absorbed by the wastewater in the heat absorption passage. After the wastewater rises to a certain temperature, it is discharged from the heat absorption passage into the evaporation concentration equipment 12 for evaporation and concentration. Since the wastewater already has a certain temperature, a large amount of heat source is no longer required to evaporate and concentrate the wastewater. The air that has absorbed excessive heat energy will re-enter the conversion chamber 1 from the air outlet 8 and re-absorb heat energy. The presence of the first insulation felt board 4 and the second insulation felt board 5 prevents a large amount of heat from being lost in the guide chamber, thereby improving the utilization rate of heat energy. When cleaning the pipeline, the water pump 11 can be connected to the clean water pool to flush the pipeline.

[0037] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is limited by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A waste heat recovery structure for an arsenic oxide conversion chamber, characterized in that: include: A heat absorption module, a guide plate, an exhaust fan, a first heat insulation felt board and a second heat insulation felt board; The first heat-insulating felt board is fixed on the wall of the conversion chamber, and a plurality of groups of heat-absorbing modules are fixed transversely and spaced apart on the first heat-insulating felt board, and adjacent heat-absorbing modules are fixedly connected by connecting pieces to form a heat-absorbing passage; The two ends of the heat absorption passage extend out of the conversion chamber respectively, one end of which is connected to the wastewater tank and the other end is connected to the evaporation concentration equipment; The guide plates are arranged in multiple groups and are respectively fixed vertically between two adjacent heat absorption modules. Avoidance holes for avoiding the connecting parts are opened on the guide plates; The second heat-insulating felt plate is detachably fixed in front of the first heat-insulating felt plate, and is closely pressed against the guide plate, and together with the first heat-insulating felt plate and the guide plate, forms a plurality of guide chambers; The guide plate is provided with guide ports to connect the multiple guide chambers, and the guide ports are alternately provided up and down; An air inlet is provided above the second thermal insulation felt board; The exhaust fan is fixed in the air inlet; An air outlet is provided below the second heat-insulating felt board and is communicated with the conversion chamber.

2. The waste heat recovery structure of an arsenic oxide conversion chamber according to claim 1, characterized in that: The heat absorption module comprises a heat absorption tube and a fixing plate. The heat absorption tube is arranged on the fixing plate in a circuitous manner. A plurality of fixing holes are provided on the fixing plate and the heat absorption tube is fixed on the first heat insulation felt plate by screws.

3. The waste heat recovery structure of an arsenic oxide conversion chamber according to claim 2, characterized in that: A water pump is arranged between the wastewater pool and the heat absorption passage.

4. The waste heat recovery structure of an arsenic oxide conversion chamber according to claim 3, characterized in that: Heat insulation panels are fixed on the remaining walls of the conversion chamber.

5. A waste heat recovery structure for an arsenic oxide conversion chamber according to any one of claims 1 to 4, characterized in that: A water inlet is provided on the wastewater pool.

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