Sand drying machine with heat circulation function

Abstract

The utility model provides a heat circulating sand drying machine which comprises a machine frame which is placed on the ground. The drying cylinder is installed on the machine frame, and the drying cylinder is horizontally arranged; the combustion chamber is arranged at one end of the drying cylinder and provides hot air for the interior of the drying cylinder; the biomass burner is arranged at the same end of the combustion chamber and connected with the combustion chamber; the feeding device comprises a feeding port formed in the upper end of the combustion chamber, and a wet sand conveying belt is arranged above the feeding port; the discharging device comprises a discharging bin which is arranged at the other end, opposite to the combustion chamber, of the drying cylinder, and a dry sand conveying belt is arranged below the discharging bin; the wet sand drying device has the advantages that wet sand can be dried, heat can be saved, and cyclic utilization of the heat is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of wet sand drying, in particular to a sand drying machine with heat circulation. Background Art

[0002] The basic principle of the wet sand dryer in the prior art is to feed the wet sand to be dried into the long-cylinder dryer rotating body from the wet sand feed bin, and at the same time, the hot air generated by the combustion furnace also enters the long-cylinder dryer rotating body from the wet sand feed bin. Under the rotation of the long-cylinder dryer rotating body, the wet sand is lifted up and pushed forward by the angled blades inside the long-cylinder dryer rotating body. The wet sand is heated by the hot air during the lifting and falling process and the moisture contained in it is evaporated. The completely dried sand is discharged from the discharge port of the dry sand discharge bin, and the water vapor is sucked out and discharged by the fan from the hot air outlet of the dry sand discharge bin.

[0003] In order to fully utilize the heat, the sand dryer in the prior art generally designs the drying drum into a multi-pass structure, which can reduce the heat loss, but the hot air finally discharged will still carry some heat and be discharged into the atmosphere along with the gas. Based on the above problems, the prior art proposes a heat circulation structure, but the heat circulation structure in the prior art is complex and the heat circulation effect is poor.

[0004] Patent publication number CN215597975U was retrieved, and the patent name is public material for circulating sand drying structure, which specifically discloses the circulating sand drying structure, including a ground, a three-return drum base and a hot air assembly, a motor seat and a positioning seat are fixed on the three-return drum base, a driving motor is installed on the top of the motor seat, side panels are symmetrically installed on the top of the positioning seat, driving wheels are rotated between the side panels, and the output end of the driving motor drives the driving wheels to rotate, a cylinder is fixed on the top of the three-return drum base, and a driven wheel is matched on the cylinder, and a sand inlet cover and a sand outlet cover are respectively connected to both ends of the cylinder, a sand inlet port is opened on the sand inlet cover, and a sand outlet port is opened on the sand outlet cover. The device proposed in the technical solution of the utility model is provided with a hot air component. During the sand conveying process, the control panel controls the operation of the fan and the heating box. The fan sends external air into the heating box through the exhaust pipe through the air supply pipe, and then enters the heating U-shaped tube through the air outlet pipe for heating. The hot air is conveyed in the heating U-shaped tube. The heating U-shaped tube is located in the cylinder to evenly dry the sand. At the same time, auxiliary U-shaped tubes are staggered and connected on the sides of two groups of relative horizontal parts on the heating U-shaped tube at equal intervals to increase the contact surface with the sand and improve the drying effect. The hot air that exchanges heat with the sand enters the return air duct through the heating U-shaped tube and returns to the heating box. Under the action of the fan, the sand is dried by circulating work, which solves the problem of poor drying effect at a position in the cylinder far away from the sand inlet. In addition, during the operation of the device, the temperature and pressure in the heating box can be controlled by the temperature sensor and pressure sensor in the heating box to improve the safety of use.

[0005] Through the analysis of the above-mentioned public materials, it can be known that although heat recycling can be achieved, the structural design is relatively complicated and the heat circulation effect is not good during actual use. Utility Model Content

[0006] In view of this, the utility model provides a sand drying machine with heat circulation, which can not only realize the drying of wet sand, but also save heat and achieve heat circulation.

[0007] In order to solve the above technical problems, the utility model provides a heat circulation sand dryer, comprising:

[0008] A rack, the rack being placed on the ground;

[0009] A drying cylinder, the drying cylinder is mounted on a frame and the drying cylinder is arranged horizontally;

[0010] A combustion chamber, which is arranged at one end of the drying cylinder and provides hot air to the interior of the drying cylinder;

[0011] A biomass burner, which is arranged at the same end of the combustion chamber and connected to the combustion chamber;

[0012] A feeding device, the feeding device comprising a feeding port arranged at the upper end of the combustion chamber, and a wet sand conveyor belt is arranged above the feeding port;

[0013] A discharge device, the discharge device comprising a discharge bin arranged on the drying cylinder at the other end relative to the combustion chamber, and a dry sand conveyor belt is arranged below the discharge bin;

[0014] An exhaust gas treatment device, the exhaust gas treatment device comprising a cyclone dust collector connected to a discharge bin, the cyclone dust collector being connected to a connecting pipe, the connecting pipe being connected to a dust removal box, and the dust removal box being connected to a chimney;

[0015] A heat circulation device comprises a heat circulation pipe connected to a discharge bin through a pipeline, one end of the heat circulation pipe is connected to the upper end of the discharge bin, and the other end is connected to a combustion chamber.

[0016] Furthermore, the combustion chamber is a hollow cylindrical structure with openings at both ends, one end connected to a drying drum and the other end connected to a biomass burner, and one side of the combustion chamber is connected to a heat circulation pipe.

[0017] Furthermore, a fan is provided on the heat circulation pipe for circulating the airflow in the heat circulation pipe, and the fan is an axial flow fan.

[0018] Furthermore, there are several dust removal boxes, which are connected in series and fixed on the frame. The connecting pipe is connected to one end of the dust removal box, and the other end of the dust removal box is connected to the chimney to discharge the treated exhaust gas into the atmosphere.

[0019] Furthermore, the cyclone dust collector is connected to the discharge bin via a pipeline, and the pipeline is installed at the upper end of the discharge bin for processing tail gas.

[0020] The beneficial effects of the above technical solution of the utility model are as follows:

[0021] 1. It can realize the drying of wet sand. The wet sand is transported to the drying drum for drying through the wet sand conveyor belt, and then the dried sand is transported away through the dry sand conveyor belt.

[0022] 2. It can save heat and achieve heat recycling. By improving and installing a heat circulation pipe, the hot air with waste heat can be transported to the combustion chamber again through the heat circulation pipe to achieve the purpose of heat recycling. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0024] In the figure: 1. frame; 2. drying cylinder; 3. combustion chamber; 4. feed inlet; 5. biomass burner; 6. wet sand conveyor belt; 7. discharge bin; 8. dry sand conveyor belt; 9. cyclone dust collector; 10. connecting pipe; 11. dust removal box; 12. chimney; 13. heat circulation pipe; 14. fan. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical scheme and advantages of the embodiment of the utility model clearer, the following will be combined with the appended drawings of the embodiment of the utility model. Figure 1 , the technical scheme of the embodiment of the utility model is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the described embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0026] like Figure 1 As shown: Example

[0027] A heat circulation sand dryer, comprising a frame 1, the frame 1 is placed on the ground; a drying cylinder 2, the drying cylinder 2 is mounted on the frame 1, the drying cylinder 2 is horizontally arranged; a combustion chamber 3, the combustion chamber 3 is arranged at one end of the drying cylinder 2, and provides hot air to the inside of the drying cylinder 2; a biomass burner 5, the biomass burner 5 is arranged at the same end of the combustion chamber 3 and connected to the combustion chamber 3; a feeding device, the feeding device comprises a feeding port 4 arranged at the upper end of the combustion chamber 3, and a wet sand conveyor belt 6 is arranged above the feeding port 4; a discharging device, the discharging device It includes a discharge bin 7 arranged on the drying cylinder 2 at the other end relative to the combustion chamber 3, and a dry sand conveyor belt 8 is arranged below the discharge bin 7; an exhaust gas treatment device, the exhaust gas treatment device includes a cyclone dust collector 9 connected to the discharge bin 7, the cyclone dust collector 9 is connected to a connecting pipe 10, the connecting pipe 10 is connected to a dust removal box 11, and the dust removal box 11 is connected to a chimney 12; a heat circulation device, the heat circulation device includes a heat circulation pipe 13 connected to the discharge bin 7 through a pipeline, one end of the heat circulation pipe 13 is connected to the upper end of the discharge bin 7, and the other end is connected to the combustion chamber 3.

[0028] In this embodiment, the frame 1 is used to support the equipment. A drying cylinder 2 is installed on the frame 1. A combustion chamber 3 is provided at one end of the drying cylinder 2. The combustion chamber 3 is connected to a biomass burner 5. Hot air is provided to the drying cylinder 2 through the biomass burner 5 and the combustion chamber 3. A feeding device is provided above the biomass burner 5. The feeding device includes a feeding port 4 and a wet sand conveyor belt 6. The wet sand is put into the drying cylinder 2 through the feeding port 4 for drying. A discharge bin 7 is provided at the other end of the drying cylinder 2. A dry sand conveyor belt 8 is provided below the discharge bin 7. An exhaust gas treatment device and a heat circulation device are connected to the discharge bin 7. The exhaust gas treatment device can realize the purification and discharge of the exhaust gas. The heat circulation device can realize the recycling of heat, reduce heat loss, and save energy. Example

[0029] The combustion chamber 3 is a hollow cylindrical structure with two openings at both ends. One end is connected to the drying cylinder 2 and the other end is connected to the biomass burner 5 . One side of the combustion chamber 3 is connected to the heat circulation pipe 13 .

[0030] Different from the above embodiment, in this embodiment, the combustion chamber 3 is a hollow cylindrical structure, fixed on the frame 1, rotatably connected to the drying drum 2, connected to the biomass burner 5 through a pipeline, and connected to the heat circulation pipe 13 through a pipeline on the side of the combustion chamber 3. The heat enters the combustion chamber 3 again through the heat circulation pipe 13 to realize the recycling of heat. Example

[0031] The heat circulation pipe 13 is provided with a fan for circulating the airflow in the heat circulation pipe 13 , and the fan is an axial flow fan 14 .

[0032] Different from the above-mentioned embodiment, in this embodiment, a fan is provided on the heat circulation pipe 13, and the fan is preferably an axial flow fan 14, which can improve the circulation utilization rate of heat. Example

[0033] The number of the dust removal boxes 11 is several, which are connected in series and fixedly arranged on the frame 1. The connecting pipe 10 is connected to one end of the dust removal box 11, and the other end of the dust removal box 11 is connected to the chimney 12 to discharge the treated exhaust gas into the atmosphere.

[0034] Different from the above embodiment, in this embodiment, in order to achieve a better dust removal effect, the number of dust removal boxes 11 is several, and they are connected in series and fixed on the frame 1. The dust removal box 11 at one end is connected to the cyclone dust collector 9, and the dust removal box 11 at the other end is connected to the chimney 12. Example

[0035] The cyclone dust collector 9 is connected to the discharge bin 7 through a pipeline, and the pipeline is installed at the upper end of the discharge bin 7 for processing tail gas.

[0036] Different from the above-mentioned embodiment, in this embodiment, the cyclone dust collector 9 is connected to the discharge bin 7 through a pipeline, and is connected to the upper end of the discharge bin 7, and the hot air is discharged from the upper end.

[0037] The working method (or working principle) of the utility model:

[0038] When the present technology is working, considering that the sand dryer loses a lot of heat when working, more biomass is needed as fuel, which wastes resources. Therefore, a heat circulation pipe 13 is installed on the discharge bin 7 through a pipeline, and the hot air in the heat circulation pipe 13 enters the combustion chamber 3 again, which can save part of the heat and reduce the amount of biomass fuel. In addition, in order to improve the utilization rate of the heat cycle, a fan is installed on the heat circulation pipe 13. The fan is an axial flow fan 14, which is resistant to high temperature and extends the service life of the equipment.

[0039] In the present invention, unless otherwise clearly stipulated and limited, for example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0040] The above is a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A heat circulation sand dryer, characterized in that: include, A frame (1), wherein the frame (1) is placed on the ground; A drying cylinder (2), wherein the drying cylinder (2) is mounted on the frame (1), and the drying cylinder (2) is arranged horizontally; A combustion chamber (3), wherein the combustion chamber (3) is arranged at one end of the drying cylinder (2) and provides hot air to the interior of the drying cylinder (2); A biomass burner (5), the biomass burner (5) being arranged at the same end of the combustion chamber (3) and connected to the combustion chamber (3); A feeding device, the feeding device comprising a feeding port (4) arranged at the upper end of the combustion chamber (3), and a wet sand conveyor belt (6) is arranged above the feeding port (4); A discharge device, the discharge device comprising a discharge bin (7) arranged on the other end of the drying cylinder (2) relative to the combustion chamber (3), and a dry sand conveyor belt (8) is arranged below the discharge bin (7); An exhaust gas treatment device, the exhaust gas treatment device comprising a cyclone dust collector (9) connected to a discharge bin (7), the cyclone dust collector (9) being connected to a connecting pipe (10), the connecting pipe (10) being connected to a dust removal box (11), and the dust removal box (11) being connected to a chimney (12); A heat circulation device, the heat circulation device comprising a heat circulation pipe (13) connected to a discharge bin (7) via a pipeline, one end of the heat circulation pipe (13) being connected to the upper end of the discharge bin (7) and the other end being connected to a combustion chamber (3).

2. A heat circulation sand dryer according to claim 1, characterized in that: The combustion chamber (3) is a hollow cylindrical structure with openings at both ends, one end of which is connected to the drying cylinder (2) and the other end of which is connected to the biomass burner (5). One side of the combustion chamber (3) is connected to the heat circulation pipe (13).

3. A heat circulation sand dryer according to claim 2, characterized in that: The heat circulation pipe (13) is provided with a fan for circulating the airflow in the heat circulation pipe (13), and the fan is an axial flow fan (14).

4. The heat circulation sand dryer according to claim 3, characterized in that: The number of the dust removal boxes (11) is several, which are connected in series and fixedly arranged on the frame (1); the connecting pipe (10) is connected to one end of the dust removal box (11), and the other end of the dust removal box (11) is connected to the chimney (12) to discharge the treated exhaust gas into the atmosphere.

5. The heat circulation sand dryer according to claim 4, characterized in that: The cyclone dust collector (9) is connected to the discharge bin (7) via a pipeline, and the pipeline is installed at the upper end of the discharge bin (7) for processing tail gas.

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