Cooling device for diazotization reaction in pigment production

Abstract

The utility model discloses a pigment production diazotization reaction cooling device which comprises a heat dissipation ring, the heat dissipation ring wraps a reaction tank and is used for heat dissipation of the reaction tank, an air inlet and an air outlet are formed in the heat dissipation ring, the heat dissipation ring comprises an attaching ring attached to the outer wall of the reaction tank, and an outer ring wall is located on the outer side of the attaching ring. The bottom plate and the top plate are fixedly connected between the outer ring wall and the attaching ring; the wind shield is positioned between the air inlet and the air outlet; a plurality of radiating fins are arranged up and down; two cooling holes are formed in the cooling fins in the extending direction, water cooling pipes are installed in the cooling holes and communicated with each other, and the two ends of each water cooling pipe are connected with a water outlet and a water inlet respectively. According to the utility model, the plurality of layers of horizontal radiating fins are fixed between the outer ring wall and the fitting ring and are matched with the air inlet to blow cold air to the radiating fins; and the cooling fins are inserted into the water cooling pipe in a snake-shaped manner, heat of the cooling fins is taken away by means of high specific heat capacity of water, and the cooling effect is improved by matching with mixed cooling of air cooling and heat transfer of the cooling fins.

Description

Technical Field

[0001] The utility model relates to the technical field of temperature reduction, and more specifically to a temperature reduction device for diazotization reaction in pigment production. Background Art

[0002] In pigment production, diazotization reaction is a key chemical process. Diazo salts are important intermediates in the preparation of many aromatic compounds (especially azo dyes). They can be converted into other compounds by various methods, such as diazo coupling, hydrolysis (to phenol), dediazotization, etc. For example, the production of Pigment Red 146 involves two steps: diazotization reaction and coupling reaction. The diazotization reaction involves the reaction of aromatic amines with sodium nitrite to form diazonium salts. This reaction is exothermic. Therefore, effective temperature control is crucial to ensure the safety of the reaction and the quality of the product. The cooling device is useful in the diazotization reaction mainly in that it can remove the heat released by the reaction in time, control the temperature within a safe range, and ensure the safe production.

[0003] The existing cooling devices also have the following disadvantages. 1. Usually, external water spraying is required for contact cooling, which results in a small cooling space, a single cooling function, a reduced cooling efficiency, and inconvenient cooling operation; 2. The reaction tank is cylindrical, and the use of single air cooling or water cooling cannot completely fit the tank surface, resulting in poor heat dissipation and large local temperature differences; 3. The cooling rate is slow, and rapid cooling cannot be achieved, resulting in reduced product quality. Utility Model Content

[0004] In order to overcome the above-mentioned defects of the prior art, the utility model provides a cooling device for diazotization reaction in pigment production.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a cooling device for diazotization reaction in pigment production, comprising a heat dissipation ring, the heat dissipation ring covers a reaction tank for heat dissipation of the reaction tank, an air inlet and an air outlet are provided on the heat dissipation ring, the heat dissipation ring comprises a heat sink, a fitting ring, an outer ring wall, a bottom plate, a top plate and a wind shield, the fitting ring is attached to the outer wall of the reaction tank, the outer ring wall is located outside the fitting ring, the bottom plate and the top plate are fixedly connected between the outer ring wall and the fitting ring, the top plate is located at the top of the fitting ring, and the bottom plate is located at the bottom of the fitting ring; the wind shield is fixed between the fitting ring and the outer ring wall, and is located between the air inlet and the air outlet, and the setting of the wind shield allows air to flow from the air inlet to the air outlet along the fitting ring;

[0006] The heat sink has multiple fins, which are arranged up and down, and the two ends of the heat sink cross section are fixedly connected and tightly attached to the outer side of the fitting ring and the inner side of the outer ring wall; the outer ring wall is provided with a drain port and a water inlet; the heat sink has two cooling holes along the extension direction, and water cooling pipes are installed in the cooling holes, the water cooling pipes are interconnected, and the two ends of the water cooling pipes are respectively connected to the drain port and the water inlet.

[0007] As a further preference, the upper and lower surfaces of the heat sink are concave toward the middle, which increases the heat dissipation area and improves air fluidity.

[0008] As a further preference, the heat sink extends in the upward and downward directions on one side close to the fitting ring, extending to the adjacent heat sink, thereby increasing the contact area between the heat sink and the fitting ring and improving the heat dissipation effect.

[0009] As a further preference, there are two groups of heat sinks, which are respectively fixed on both sides of the inside of the heat dissipation ring, the two groups of heat sinks are arranged at intervals, and the water cooling pipes at the two groups of heat sinks are connected by connecting pipes to facilitate replacement and maintenance.

[0010] As a further preference, a pressurized fan is provided between the two groups of heat sinks, and the pressurized fan is fixed inside the heat dissipation ring to improve the air flow effect.

[0011] As a further preference, the air flows from the air inlet to the air outlet in a direction opposite to the coolant flowing from the water inlet to the water outlet, so as to balance the temperatures of the air inlet and the air outlet to prevent the local temperature from being too high.

[0012] As a further preference, the fitting ring, outer ring wall, top plate, bottom plate, water cooling tube and heat sink are made of metal copper to improve thermal conductivity and thus improve heat dissipation effect.

[0013] As a further preference, a water tank is fixed on the outside of the outer ring wall, and the water tank is annularly enclosed in the outer ring wall, and cooperates with the outer ring wall to store cooling liquid; the water tank comprises a water inlet pipe, a water baffle and a water outlet pipe, and the water baffle is fixed inside the water tank; the water inlet pipe and the water outlet pipe are opened on the outer wall of the water tank, and are respectively located on both sides of the water baffle, and the water tank is used to absorb the heat dissipated by the outer ring wall to prevent the outer ring wall from having a high temperature and coming into contact with the staff, thereby causing the risk of scalding.

[0014] Technical effects and advantages of the utility model:

[0015] 1. The utility model fixes multiple layers of horizontal heat sinks between the outer ring wall and the fitting ring, blows cold air to the heat sinks with the air inlet to dissipate heat, and transfers heat to the outer ring wall and the air outlet through heat transfer and air cooling to dissipate heat, thereby increasing the heat dissipation area and improving the heat dissipation effect;

[0016] 2. The utility model uses the heat sink to snake through the water cooling tube, relying on the high specific heat capacity of the water to take away the heat of the heat sink, and combines air cooling and heat transfer from the heat sink to dissipate heat, thereby improving the heat dissipation rate;

[0017] 3. The utility model increases the contact area with the heat sink and improves the heat dissipation effect by closely contacting the one side of the fitting ring with the heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic structural diagram of a cooling device for diazotization reaction in pigment production.

[0019] Figure 2 The utility model is a stereoscopic diagram of a cooling device for diazotization reaction in pigment production.

[0020] Figure 3 for Figure 1 aa side sectional view.

[0021] Figure 4 It is a schematic diagram of the structure of the heat sink in the utility model.

[0022] Figure 5 It is a structural schematic diagram of the pressurized fan in the utility model.

[0023] Figure 6 It is a structural schematic diagram of the water tank in the utility model.

[0024] The accompanying drawings are marked as follows: 1. air inlet; 2. wind shield; 3. water cooling pipe; 4. heat sink; 5. pressurized fan; 6. drain outlet; 7. water inlet; 8. fitting ring; 9. outer ring wall; 10. bottom plate; 11. air outlet; 12. top plate; 13. water tank; 301. connecting pipe; 401. cooling hole; 1301. water inlet pipe; 1302. water shield; 1303. water outlet pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] As attached Figure 1-3A cooling device for a diazotization reaction in pigment production is shown, comprising a heat dissipation ring, the heat dissipation ring covers a reaction tank for heat dissipation of the reaction tank, an air inlet 1 and an air outlet 11 are provided on the heat dissipation ring, the heat dissipation ring comprises a heat sink 4, a fitting ring 8, an outer ring wall 9, a bottom plate 10, a top plate 12 and a wind shield 2, the fitting ring 8 is attached to the outer wall of the reaction tank, the outer ring wall 9 is located outside the fitting ring 8, the bottom plate 10 and the top plate 12 are fixedly connected between the outer ring wall 9 and the fitting ring 8, the top plate 12 is located at the top of the fitting ring 8, and the bottom plate 10 is located at the bottom of the fitting ring 8; the wind shield 2 is fixed between the fitting ring 8 and the outer ring wall 9, and is located between the air inlet 1 and the air outlet 11, and the setting of the wind shield 2 allows air to flow from the air inlet 1 to the air outlet 11 along the fitting ring 8;

[0027] like Figure 3 As shown, in the embodiment of the utility model, the heat sink 4 has multiple pieces, which are arranged up and down, and the two ends of the cross section of the heat sink 4 are fixedly connected and tightly attached to the outer side of the fitting ring 8 and the inner side of the outer ring wall 9; the outer ring wall 9 is provided with a drain port 6 and a water inlet 7; the heat sink 4 is provided with two cooling holes 401 along the extension direction, and water cooling pipes 3 are installed in the cooling holes 401, and the water cooling pipes 3 are interconnected, and the two ends of the water cooling pipe 3 are respectively connected to the drain port 6 and the water inlet 7.

[0028] During operation of this embodiment, air flows from the air inlet 1 to the air outlet 11 in the opposite direction to the coolant flowing from the water inlet 7 to the water outlet 6, so as to balance the temperature of the air inlet 1 and the air outlet 11 and prevent the local temperature from being too high.

[0029] See also Figure 4 As shown, in the embodiment of the utility model, the upper and lower surfaces of the heat sink 4 are concave toward the middle, which increases the heat dissipation area and improves the fluidity of the air, and the cold air flows to the air outlet 11 through the concave part of the heat sink 4.

[0030] In the embodiment of the utility model, the heat sink 4 extends in the upward and downward direction near the side of the fitting ring 8 to the adjacent heat sink 4, thereby increasing the contact area between the heat sink 4 and the fitting ring 8 and improving the heat dissipation effect.

[0031] like Figure 1 As shown, in the embodiment of the utility model, there are two groups of heat sinks 4, which are respectively fixed on both sides of the inside of the heat dissipation ring, and the two groups of heat sinks 4 are arranged at intervals. The water-cooling tubes 3 at the two groups of heat sinks 4 are connected by a connecting pipe 301. The connecting pipe 301 passes through the wind shield 2 to connect to the water-cooling tube 3 on the other side. Multiple water-cooling tubes 3 are sealed and connected by threaded fasteners, and are arranged in sections through the heat sink 4, so that the heat sink 4 is fan-shaped to facilitate the insertion of the water-cooling tube 3 and to facilitate replacement and maintenance.

[0032] like Figure 1 and Figure 5 As shown, in the embodiment of the utility model, a pressurized fan 5 is provided between the two groups of heat sinks 4, and the pressurized fan 5 is fixed inside the heat dissipation ring to improve the air flow effect.

[0033] During the operation of the utility model, cold air enters the heat dissipation ring cavity through the fan arranged at the air inlet, is blocked by the wind shield 2, blows toward the heat sink 4 in one direction, and is blown toward the heat sink 4 on the other side through the pressurized fan 5, and is blown out through the air outlet 11. At the same time, cooling water enters the water cooling pipe 3 through the water inlet 7 to dissipate the heat of the heat sink 4. After flowing through one group of longitudinal heat sinks 4, it flows to another group of heat sinks 4 through the connecting pipe 301, and is discharged through the drain port 6.

[0034] In this embodiment, the fitting ring 8, the outer ring wall 9, the top plate 12, the bottom plate 10, the water cooling tube 3 and the heat sink 4 are made of metal copper to improve the thermal conductivity and thus improve the heat dissipation effect.

[0035] like Figure 6 As shown, in an embodiment of the utility model, a water tank 13 is fixed on the outside of the outer ring wall 9, and the water tank 13 is annularly enclosed by the outer ring wall 9, and cooperates with the outer ring wall 9 to store cooling liquid; the water tank 13 includes a water inlet pipe 1301, a water baffle 1302 and a water outlet pipe 1303, and the water baffle 1302 is fixed inside the water tank 13; the water inlet pipe 1301 and the water outlet pipe 1303 are opened on the outer wall of the water tank 13, and are respectively located on both sides of the water baffle 1302, and the water tank 13 is used to absorb the heat dissipated by the outer ring wall 9.

[0036] During the operation of this embodiment, part of the heat is transferred to the outer ring wall 9 through the heat sink 4, and the heat of the outer ring wall 9 is transmitted to the water tank 13, and is cooled and dissipated by the water flow from the water inlet pipe 1301 through the inside of the water tank 13 to the water outlet pipe 1303, thereby preventing the outer ring wall 9 from being too hot and coming into contact with the staff, thereby preventing the risk of scalding.

[0037] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited, and conventional equipment can be used. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling device for a diazotization reaction in pigment production, comprising a heat dissipation ring, the heat dissipation ring covering a reaction tank for heat dissipation of the reaction tank, the heat dissipation ring being provided with an air inlet and an air outlet, characterized in that The heat dissipation ring comprises a heat sink, a fitting ring, an outer ring wall, a bottom plate, a top plate and a windshield, the fitting ring is attached to the outer wall of the reaction tank, the outer ring wall is located outside the fitting ring, the bottom plate and the top plate are fixedly connected between the outer ring wall and the fitting ring, the top plate is located at the top of the fitting ring, and the bottom plate is located at the bottom of the fitting ring; The wind shield is fixed between the fitting ring and the outer ring wall, and is located between the air inlet and the air outlet; The heat sink comprises a plurality of fins which are arranged up and down, and the two ends of the cross section of the heat sink are fixedly connected and closely attached to the outer side of the fitting ring and the inner side of the outer ring wall; The outer ring wall is provided with a water outlet and a water inlet; The heat sink is provided with two cooling holes along the extension direction, and water cooling pipes are installed in the cooling holes. The water cooling pipes are interconnected, and two ends of the water cooling pipes are respectively connected to the drain port and the water inlet.

2. A cooling device for diazotization reaction of pigment production according to claim 1, characterized in that: The upper and lower surfaces of the heat sink are concave in the middle.

3. A cooling device for diazotization reaction of pigment production according to claim 2, characterized in that: The heat sink extends in the upward and downward directions close to one side of the fitting ring, and extends to the adjacent heat sink.

4. A cooling device for diazotization reaction in pigment production according to claim 1, characterized in that: There are two groups of heat sinks, which are respectively fixed on two sides of the heat sink ring. The two groups of heat sinks are arranged at intervals, and the water cooling pipes at the two groups of heat sinks are connected by connecting pipes.

5. A cooling device for diazotization reaction in pigment production according to claim 4, characterized in that: A pressurized fan is arranged between the two groups of heat sinks, and the pressurized fan is fixed inside the heat dissipation ring.

6. A cooling device for diazotization reaction in pigment production according to claim 1, characterized in that: The direction in which the air flows from the air inlet to the air outlet is opposite to the direction in which the coolant flows from the water inlet to the water outlet.

7. A cooling device for diazotization reaction in pigment production according to claim 1, characterized in that: The fitting ring, outer ring wall, top plate, bottom plate, water cooling pipe and heat sink are made of metal copper.

8. A cooling device for diazotization reaction in pigment production according to claim 1, characterized in that: A water tank is fixed on the outside of the outer ring wall. The water tank is annularly enclosed by the outer ring wall and cooperates with the outer ring wall to store cooling liquid; the water tank includes a water inlet pipe, a water baffle and a water outlet pipe, and the water baffle is fixed inside the water tank; the water inlet pipe and the water outlet pipe are opened on the outer wall of the water tank and are respectively located on both sides of the water baffle.

Images