Preheating device for phthalic anhydride production raw materials

Abstract

The utility model provides a phthalic anhydride production raw material preheating device which comprises a first box body, a heat exchange mechanism is arranged in the first box body, and the heat exchange mechanism comprises a plurality of cylinders arranged at the bottom end in the first box body, a second box body, a first transverse rod, a heating pipe, a heating box, a second transverse rod, a first coiled pipe, a square hole, a connecting pipe and a third box body. A plurality of third cross rods are arranged in the third box body, second coiled pipes connected with the first coiled pipes are arranged on the third cross rods, and a longitudinal moving mechanism is arranged at the top of the third box body. According to the phthalic anhydride production raw material preheating device disclosed by the utility model, the basic heating requirement on materials can be met, and redundant heat in the cavity can be collected through the heat exchange mechanism, so that the heat sprayed outwards from the inside of the inner cavity is collected by taking water as a carrier; and the materials are primarily heated, excessive heat is prevented from being radiated outwards, heat resources are saved, and fire disasters are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of preheating equipment for raw materials in phthalic anhydride production, and particularly relates to a preheating device for raw materials in phthalic anhydride production. Background Art

[0002] The existing preheating device for raw materials in phthalic anhydride production generally includes an outer cavity arranged on the bottom surface, an inner cavity is arranged inside the outer cavity, heat exchange tubes are arranged on the outer side of the inner cavity, and a heating mechanism is arranged inside the inner cavity. By heating the heating mechanism, the heat exchange tubes are heated, so as to heat the materials inside the heat exchange tubes. In the actual use process, the heating mechanism heats inside the inner cavity, so that the heat inside the inner cavity radiates outward, so as to heat the heat exchange tubes inside the outer cavity. However, during the heating process, the heat inside the outer cavity is relatively high, and it dissipates outward through the side wall of the outer cavity, making the temperature around the outer cavity very high, which is likely to cause a fire and waste heat resources.

[0003] For example, the utility model with the publication number CN208606396U discloses a preheating device for raw materials in phthalic anhydride production. In the technical solution of this patent, during the preheating process of the materials, first, the heating mechanism is heated. At this time, the steam nozzles on the inner cavity heat outward, so as to heat the exchange tubes arranged on the outer side wall of the inner cavity. At this time, the excess heat radiates outward through the outer cavity, so that the temperature of the external air increases, resulting in waste of heat resources and easy occurrence of fire due to too high temperature. Therefore, a preheating device for raw materials in phthalic anhydride production is proposed. Summary of the Utility Model

[0004] In view of this, aiming at the deficiencies of the prior art, the utility model provides a preheating device for raw materials in phthalic anhydride production, which can not only meet the basic heating requirements for the materials, but also collect the excess heat inside the cavity through a heat exchange mechanism, so that the heat ejected outward from the inside of the inner cavity is collected with water as a carrier and used for primary heating of the materials, avoiding the outward radiation of excess heat, saving heat resources and preventing fires.

[0005] To solve the above technical problems, the technical solution adopted by the present utility model is: a phthalic anhydride production raw material preheating device, including a first box body. Inside the first box body, there is a heat exchange mechanism. The heat exchange mechanism includes a plurality of cylinders arranged at the inner bottom end of the first box body. At the top of the plurality of cylinders, there is a second box body. At the inner bottom end of the second box body, there are a plurality of first cross bars. On the plurality of first cross bars, there are heating tubes. At the rear side of the first box body, there is a heating box connected to the heating tubes. At the inner top end of the second box body, there are a plurality of second cross bars. On the plurality of second cross bars, there is a first serpentine tube. At the right end of the first box body, there is a square hole. On the right side of the first box body, there is a connecting pipe corresponding to the square hole. On the right side of the connecting pipe, there is a third box body. Inside the third box body, there are a plurality of third cross bars. On the third cross bars, there is a second serpentine tube connected to the first serpentine tube. At the top of the third box body, there is a longitudinal moving mechanism.

[0006] As a further improvement of the present utility model, the longitudinal moving mechanism includes fixing blocks arranged on the left and right sides at the inner top end of the third box body. At the end parts of the inner sides of the two fixing blocks, there are sliding grooves. Inside the two sliding grooves, there are respectively sliders. Inside the two sliding grooves, there are respectively lead screws passing through the sliders. At the front ends of the two fixing blocks, there is a first rotating motor connected to the lead screw. The first rotating motor and the lead screw are connected by a coupling. Between the two sliders, there is a transverse moving mechanism.

[0007] As a further improvement of the present utility model, the transverse moving mechanism includes a cross plate arranged between the two sliders. At the left end of the top of the cross plate, there is a first rotating shaft. At the top of the first rotating shaft, there is a first synchronous pulley. At the right side of the top of the cross plate, there is a second rotating shaft. At the top of the second rotating shaft, there is a second synchronous pulley. Between the first synchronous pulley and the second synchronous pulley, there is a transmission belt. At the bottom of the cross plate, there is a second rotating motor connected to the second rotating shaft. The second rotating motor and the second rotating shaft are connected by a coupling. In the middle of the cross plate, there is a sliding track. Inside the sliding track, there is a sliding body. At the top of the sliding body, there is a moving block connected to the transmission belt. On the moving block, there is a stirring mechanism.

[0008] As a further improvement of the present utility model, the stirring mechanism includes a rotating rod arranged on the moving block and passing through the sliding body. On the rotating rod, there are a plurality of stirring teeth. At the top of the moving block, there is a third rotating motor connected to the rotating rod.

[0009] As a further improvement of the present utility model, at the front end of the third box body, there is a switch. The switch is electrically connected to the first rotating motor, the second rotating motor, and the third rotating motor. At the four corners of the bottom of the first box body, there are respectively support feet. At the bottom of the four support feet, there are respectively support pads. At the four corners of the bottom of the third box body, there are respectively support legs. At the bottom of the four support legs, there are respectively anti-slip pads.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] First, the design scheme is provided with a heating box that can generate heat. When the heating box is started, the temperature of the heating box is transmitted to the inside of the second box through the heating pipe. At this time, the inside of the second box is filled with heat, thereby heating the first serpentine pipe, and thus heating the material inside the first serpentine pipe well. At this time, the excess heat inside the second box is absorbed by the water between the first box and the second box. Then, the hot water heats the water inside the third box through the connecting pipe, thereby conveniently preheating the second serpentine pipe connected to the first serpentine pipe, thus improving the heating efficiency of the material.

[0012] Second, the design scheme is provided with a first rotating motor. When the first rotating motor is started, the rotation of the first rotating motor drives the lead screw to rotate, and the rotation of the lead screw drives the slider to move inside the chute, thereby conveniently moving the stirring mechanism in the front-rear direction.

[0013] Third, the design scheme is provided with a second rotating motor. The rotation of the second rotating motor drives the second rotating shaft to rotate, thereby causing the second synchronous pulley to rotate, thereby causing the transmission belt to move, thereby driving the moving block to move in the left-right direction. At this time, the sliding body moves in the left-right direction inside the slideway, thereby conveniently moving the stirring mechanism in the left-right direction.

[0014] Fourth, the design scheme is provided with a third rotating motor. When the third rotating motor is started, the rotation of the third rotating motor drives the rotating rod to rotate, thereby driving the stirring teeth to rotate, thereby stirring the water inside the third box, thus conveniently balancing the temperature of the water inside the third box. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0016] Figure 1 is a schematic diagram of the internal structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the structure of the present utility model;

[0018] Figure 3 is a schematic diagram of a partially enlarged structure at A of the present utility model;

[0019] Figure 4 is a schematic diagram of a partially enlarged structure at B of the present utility model.

[0020] In the figure: 101, the first box body; 102, the cylinder; 103, the second box body; 104, the first cross bar; 105, the heating pipe; 106, the heating box; 107, the second cross bar; 108, the first serpentine pipe; 109, the square hole; 110, the connecting pipe; 111, the third box body; 112, the third cross bar; 113, the second serpentine pipe; 114, the fixing block; 115, the sliding groove; 116, the sliding block; 117, the lead screw; 118, the first rotating motor; 119, the cross plate; 120, the first synchronous pulley; 201, the second synchronous pulley; 202, the second rotating motor; 203, the sliding way; 204, the sliding body; 205, the moving block; 206, the rotating rod; 207, the stirring teeth; 208, the third rotating motor; 209, the switch. Detailed implementation manners

[0021] To better understand the present utility model, the content of the present utility model will be further clearly elaborated below in conjunction with embodiments. However, the protected content of the present utility model is not limited to the following embodiments only. In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details.

[0022] As Figure 1 、 2 shown, the phthalic anhydride production raw material preheating device includes the first box body 101. A heat exchange mechanism is arranged inside the first box body 101. The heat exchange mechanism includes a plurality of cylinders 102 arranged at the inner bottom end of the first box body 101. A second box body 103 is arranged at the top of the plurality of cylinders 102. A plurality of first cross bars 104 are arranged at the inner bottom end of the second box body 103. Heating pipes 105 are arranged on the plurality of first cross bars 104. A heating box 106 connected to the heating pipes 105 is arranged at the rear side of the first box body 101. A plurality of second cross bars 107 are arranged at the inner top end of the second box body 103. A first serpentine pipe 108 is arranged on the plurality of second cross bars 107. A square hole 109 is arranged at the right side end of the first box body 101. A connecting pipe 110 corresponding to the square hole 109 is arranged at the right side of the first box body 101. A third box body 111 is arranged at the right side of the connecting pipe 110. A plurality of third cross bars 112 are arranged inside the third box body 111. A second serpentine pipe 113 connected to the first serpentine pipe 108 is arranged on the third cross bars 112. A longitudinal moving mechanism is arranged at the top of the third box body 111.

[0023] As Figure 1 、 2, as shown in FIGS. 3 and 4, the longitudinal movement mechanism includes fixed blocks 114 provided on the left and right sides at the inner top of the box body 111. At the end of the inner sides of the two fixed blocks 114, there are chutes 115. Inside the two chutes 115, there are sliders 116 respectively. Inside the two chutes 115, there are lead screws 117 passing through the sliders 116. At the front ends of the two fixed blocks 114, there is a first rotary motor 118 connected to the lead screw 117. The first rotary motor 118 and the lead screw 117 are connected by a coupling. Between the two sliders 116, there is a transverse movement mechanism provided in common.

[0024] As Figure 1 , 2 , as shown in FIGS. 3 and 4, the transverse movement mechanism includes a cross plate 119 provided between the two sliders 116. At the left end of the top of the cross plate 119, there is a first rotating shaft. At the top of the first rotating shaft, there is a first synchronous pulley 120. At the right side of the top of the cross plate 119, there is a second rotating shaft. At the top of the second rotating shaft, there is a second synchronous pulley 201. Between the first synchronous pulley 120 and the second synchronous pulley 201, there is a transmission belt provided in common. At the bottom of the cross plate 119, there is a second rotary motor 202 connected to the second rotating shaft. The second rotary motor 202 and the second rotating shaft are connected by a coupling. In the middle of the cross plate 119, there is a slideway 203. Inside the slideway 203, there is a sliding body 204. At the top of the sliding body 204, there is a moving block 205 connected to the transmission belt. On the moving block 205, there is a stirring mechanism provided.

[0025] As Figure 1 , 2 , as shown in FIGS. 3 and 4, the stirring mechanism includes a rotating rod 206 provided on the moving block 205 and passing through the sliding body 204. On the rotating rod 206, there are a plurality of stirring teeth 207. At the top of the moving block 205, there is a third rotary motor 208 connected to the rotating rod 206.

[0026] As Figure 1 As shown in the figure, at the front end of the box body 111, there is a switch 209. The switch 209 is electrically connected to the first rotary motor 118, the second rotary motor 202, and the third rotary motor 208. At the four corners of the bottom of the box body 101, there are support feet respectively. At the bottoms of the four support feet, there are support pads respectively. At the four corners of the bottom of the box body 111, there are support legs respectively. At the bottoms of the four support legs, there are anti-slip pads respectively.

[0027] The user first starts the heating box 106. The temperature of the heating box 106 is transferred to the inside of the second box body 103 through the heating pipe 105. At this time, the inside of the second box body 103 is filled with heat, so as to heat the first serpentine pipe 108, and thus heat the material inside the first serpentine pipe 108 well. At this time, the excess heat inside the second box body 103 is absorbed by the water between the first box body 101 and the second box body 103. Then the hot water makes the water inside the third box body 111 heated through the connecting pipe 110, so as to preheat the second serpentine pipe 113 connected to the first serpentine pipe 108, thereby improving the heating efficiency of the material. Start the first rotating motor. The rotation of the first rotating motor drives the lead screw 117 to rotate. The rotation of the lead screw 117 drives the slider 116 to move inside the chute 115, so that the stirring mechanism moves in the front and back directions.

[0028] The rotation of the second rotating motor 202 drives the second rotating shaft to rotate, so that the second synchronous pulley 201 rotates, so that the transmission belt moves, driving the moving block 205 to move in the left and right directions. At this time, the sliding body 204 moves in the left and right directions inside the slideway 203, so that the stirring mechanism moves in the left and right directions. Start the third rotating motor 208. The rotation of the third rotating motor 208 drives the rotating rod 206 to rotate, driving the stirring teeth 207 to rotate, so as to stir the water inside the third box body 111, and thus balance the temperature of the water inside the third box body 111.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Any other modifications or equivalent replacements made by those of ordinary skill in the art to the technical solutions of the present invention should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims

1. A phthalic anhydride production raw material preheating device, comprising a housing 1 (101), characterized in that: A heat exchange mechanism is arranged inside the box body 1 (101), and the heat exchange mechanism comprises a plurality of cylinders (102) arranged at the bottom end of the box body 1 (101); a box body 2 (103) is arranged on the top of the plurality of cylinders (102); a plurality of cross bars (104) are arranged at the bottom end of the box body 2 (103); a heating tube (105) is arranged on the plurality of cross bars (104); a heating box (106) connected to the heating tube (105) is arranged at the rear side of the box body 1 (101); a plurality of cross bars (106) are arranged at the top end of the box body 2 (103); 7), a plurality of cross bars (107) are provided with a serpentine tube (108), a square hole (109) is provided at the right end of the box body (101), a connecting tube (110) corresponding to the square hole (109) is provided on the right side of the box body (101), a box body (111) is provided on the right side of the connecting tube (110), a plurality of cross bars (112) are provided inside the box body (111), a serpentine tube (113) connected to the serpentine tube (108) is provided on the cross bars (112), and a longitudinal moving mechanism is provided on the top of the box body (111).

2. The phthalic anhydride production raw material preheating device as claimed in claim 1, characterized in that: The longitudinal moving mechanism comprises fixed blocks (114) arranged on the left and right sides of the top end inside the box body (111), the ends of the inner ends of the two fixed blocks (114) are provided with sliding grooves (115), the insides of the two sliding grooves (115) are respectively provided with sliders (116), the insides of the two sliding grooves (115) are respectively provided with lead screws (117) passing through the sliders (116), the front ends of the two fixed blocks (114) are provided with first rotating motors (118) connected to the lead screws (117), and a transverse moving mechanism is commonly provided between the two sliders (116).

3. The phthalic anhydride production raw material preheating device as claimed in claim 2, characterized in that: The transverse moving mechanism comprises a transverse plate (119) arranged between two sliders (116), a rotating shaft 1 is arranged at the left end of the top of the transverse plate (119), a synchronous pulley 1 (120) is arranged at the top of the rotating shaft 1, a rotating shaft 2 is arranged at the right side of the top of the transverse plate (119), a synchronous pulley 2 (201) is arranged at the top of the rotating shaft 2, a transmission belt is arranged between the synchronous pulley 1 (120) and the synchronous pulley 2 (201), a second rotating motor (202) connected to the rotating shaft 2 is arranged at the bottom of the transverse plate (119), the second rotating motor (202) and the rotating shaft 2 are connected via a coupling, a slideway (203) is arranged in the middle of the transverse plate (119), a sliding body (204) is arranged inside the slideway (203), a moving block (205) connected to the transmission belt is arranged at the top of the sliding body (204), and a stirring mechanism is arranged on the moving block (205).

4. The phthalic anhydride production raw material preheating device as claimed in claim 3, characterized in that: The stirring mechanism comprises a rotating rod (206) arranged on the moving block (205) and passing through the sliding body (204), a plurality of stirring teeth (207) being arranged on the rotating rod (206), and a third rotating motor (208) connected to the rotating rod (206) being arranged on the top of the moving block (205).

5. The phthalic anhydride production raw material preheating device as claimed in claim 4, characterized in that: The first rotating motor (118) and the lead screw (117) are connected via a coupling.

6. The phthalic anhydride production raw material preheating device as claimed in claim 5, characterized in that: A switch (209) is provided at the front end of the box body three (111).

7. The phthalic anhydride production raw material preheating device as claimed in claim 6, characterized in that: The four corners of the bottom of the box body 1 (101) are respectively provided with supporting feet, and the bottoms of the four supporting feet are respectively provided with supporting pads. The four corners of the bottom of the box body 3 (111) are respectively provided with supporting legs, and the bottoms of the four supporting legs are respectively provided with anti-slip pads.

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