Heat transfer structure of dividing wall evaporation kettle

Abstract

The utility model discloses a heat transfer structure of a dividing wall evaporation kettle, the heat transfer structure comprises a bottom plate and a top plate, the bottom plate of an arc structure is provided with at least one steam inlet and at least one steam outlet, the upper side wall of the top plate of the arc structure abuts against the lower end face of a kettle body, and a plurality of heat transfer fins are arranged on the lower side wall of the top plate in parallel. The top plate is connected with the bottom plate through the upper sealing plate and the side sealing plates to form a heat conduction cavity, and gaps are formed between the heat transfer fins and the upper side wall of the bottom plate. According to the utility model, steam is dispersed and filled among the plurality of heat transfer fins in the heat conduction cavity to form a larger contact area so as to quickly transfer heat, and the dispersed arrangement of the heat transfer fins can also enable the heat transfer surface to be more uniform, so that the heat at each position of the top plate to be more uniform, and the kettle body is ensured to be quickly and uniformly heated and insulated.

Description

Technical Field

[0001] The utility model relates to the technical field of evaporation kettle devices, in particular to a heat transfer structure of a partition wall evaporation kettle. Background Art

[0002] The evaporator is used to treat wastewater containing high concentrations of salts or other soluble solids. By heating the kettle body, the wastewater is evaporated at an appropriate temperature, thereby achieving the purpose of reducing the amount of wastewater and recovering useful substances.

[0003] In the prior art, there are two main forms of heating the kettle body. One is heating through a heating tube, such as a concentration evaporator with a pretreatment function with application number 202321556997.X, which discloses that a heating tube is installed on the inner wall of the concentration evaporator. The other is heating through steam, such as a wastewater evaporator with application number 202322931470.7, which discloses a horizontal kettle body, and the steam inlet and steam outlet are both arranged on the outer wall of the kettle body, which can increase the contact area of ​​the evaporator during heating and evaporation, and improve the evaporation efficiency. However, when steam is filled into the cavity for heat transfer, it only has a contact surface on the side adjacent to the evaporator, that is, heat can only be transferred through this contact surface, resulting in low heat transfer efficiency. Utility Model Content

[0004] The purpose of the utility model is to provide a heat transfer structure of a partitioned wall evaporator, in which steam is dispersed and filled between a plurality of heat transfer fins in a heat conduction cavity to form a larger contact area for rapid heat transfer. The dispersed arrangement of the heat transfer fins can also make the heat transfer surface more uniform, so that the heat at each position of the top plate is more uniform, thereby ensuring rapid and uniform heating and heat preservation of the kettle body.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is: a heat transfer structure of a partition wall evaporator, comprising a kettle body and a heat transfer mechanism arranged at the lower end of the kettle body, wherein the heat transfer mechanism comprises:

[0006] The bottom plate has an arc-shaped structure, and is provided with at least one steam inlet and at least one steam outlet.

[0007] The top plate has an arc-shaped structure, the upper side wall of the top plate abuts against the lower end surface of the kettle body, and a plurality of heat transfer fins are arranged in parallel on the lower side wall of the top plate.

[0008] The top plate is connected to the bottom plate through an upper sealing plate and a side sealing plate to form a heat conduction cavity, and a gap is formed between the heat transfer fins and the upper side wall of the bottom plate.

[0009] As a further optimization, the extension direction of the heat transfer fins is parallel to the central axis of the kettle body.

[0010] As a further optimization, the heat transfer fins have a turbulent structure, such as a wavy structure, which can increase the flow time of steam between adjacent heat transfer fins and increase the contact area with the heat transfer fins, thereby increasing the heat transfer area.

[0011] As a further optimization, N partitions are provided on the lower side wall of the top plate and abut against the upper side wall of the bottom plate for dividing the heat transfer cavity into N+1 heat transfer zones. Each heat transfer zone is provided with at least one steam inlet and at least one steam outlet, where N is a natural number greater than or equal to 1. By forming multiple separated heat transfer zones, the filling and formation of steam in the heat transfer cavity can be shortened, thereby shortening the filling time.

[0012] As a further optimization, a groove is provided on the upper side wall of the bottom plate, and the lower end of the partition is embedded in the groove. The staggered gap formed by the partition embedded in the groove can improve the sealing effect of each heat transfer zone.

[0013] As a further optimization, the steam outlet is arranged at the lower part of the bottom plate, and the steam inlet is arranged at the upper part of the bottom plate. Since steam is relatively light and has the characteristic of flowing upward, arranging the steam inlet at the upper part and the steam outlet at the lower part can prevent the steam from flowing out of the heat transfer cavity too quickly, and can increase the contact time of the steam with the heat transfer fins / top plate in the heat transfer cavity.

[0014] As a further optimization, the steam inlets are symmetrically provided on the opposite side walls of the upper portion of the bottom plate, and the steam can be quickly filled into the heat transfer cavity through the steam inlets located on both sides of the heat transfer mechanism.

[0015] As a further optimization, the bottom plate is made of stainless steel; the top plate and heat transfer fins are made of aluminum, which has excellent heat transfer effect.

[0016] As a further optimization, the top plate is connected to the kettle body by welding; the upper sealing plate and the side sealing plates are respectively connected to the top plate and the bottom plate by welding.

[0017] As a further optimization, the heat transfer mechanism is provided with a clearance hole for the support legs of the kettle body to pass through, and the clearance hole and the heat conduction cavity form a closed structure to prevent steam from overflowing.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. Steam is dispersed and filled between multiple heat transfer fins in the heat conduction cavity, forming a large contact area for rapid heat transfer. The dispersed arrangement of the heat transfer fins also makes the heat transfer surface more uniform, making the heat at each position of the top plate more uniform, ensuring rapid and uniform heating and heat preservation of the kettle body.

[0020] 2. A partition is set in the heat conduction cavity, which is in contact with both the bottom plate and the top plate. The partition divides the heat conduction cavity into multiple heat transfer zones, which can shorten the steam filling time and ensure rapid heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of the utility model.

[0022] Figure 2 It is a cross-sectional view of the present utility model.

[0023] Figure 3 It is a schematic diagram of the top plate and heat transfer fins of the utility model.

[0024] Figure 4 This is a schematic diagram of the installation of the top plate, heat transfer fins and bottom plate of an embodiment of the utility model.

[0025] Figure 5 for Figure 4 Enlarged view of point A in the middle.

[0026] Figure 6 This is a schematic diagram of the installation of the top plate, heat transfer fins and bottom plate of another embodiment of the utility model. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] like Figures 1 to 3As shown, a heat transfer structure of a partition wall evaporator includes a kettle body 10 and a heat transfer mechanism 20 arranged at the lower end of the kettle body 10. The heat transfer mechanism 20 includes a bottom plate 21 and a top plate 221. The bottom plate 21 is an arc-shaped structure. At least one steam inlet 201 and at least one steam outlet 202 are provided on the bottom plate 21. For example, a pair of steam inlets 201 are symmetrically provided on opposite sides of the upper part of the bottom plate 21, and a steam outlet 202 is provided at the lower part of the bottom plate 21 and between the pair of steam inlets 201. A steam outlet 202 is provided in the middle, the top plate 221 is an arc-shaped structure, the upper side wall of the top plate 221 is in contact with the lower end surface of the kettle body 10, and a plurality of heat transfer fins 222 are provided in parallel on the lower side wall of the top plate 221. The top plate 221 is connected to the bottom plate 21 through the upper sealing plate 231 and the side sealing plate 232 to form a heat conduction cavity 200. A gap is formed between the heat transfer fins 222 and the upper side wall of the bottom plate 21, and there is a gap 2220 between adjacent heat transfer fins 222. To ensure the connection effect and heat transfer effect, preferably, the bottom plate 21 is made of stainless steel, which has excellent strength, and its lower side wall can be covered with insulation material to prevent heat loss. The top plate 221 and the heat transfer fins 222 are made of aluminum, which has excellent heat transfer effect. The top plate 221 is welded to the kettle body 10, such as brazing, and the upper sealing plate 231 and the side sealing plate 232 are welded to the top plate 221 and the bottom plate 21 respectively.

[0029] In the present invention, steam enters the heat-conducting cavity 200 from the steam inlet 201. The gaps between the heat-conducting fins 222 and the bottom plate 21 make the heat-conducting cavity 200 a connected space as a whole. Therefore, the flow of steam is not blocked. Due to the continuous transportation of steam in the heat-conducting cavity 200, the steam fills various positions in the heat-conducting cavity 200, especially the gaps 2220 between adjacent heat-conducting fins 222. The heat of the steam in the gaps 2220 can be uniformly and quickly transferred to the heat-conducting fins 222 / top plate 221, and then transferred to the kettle body 10 through the multiple heat-conducting fins 222 and the top plate 221 to heat and keep the kettle body 10 warm. After the heat transfer is completed, the steam or the formed condensed water can be discharged through the steam outlet 202. The discharge process of the steam outlet 202 can be continuous discharge or intermittent discharge by blocking the steam outlet 202 for a set time and then opening it.

[0030] In the present invention, steam is dispersed in the heat conduction cavity 200 and filled into the gaps 2220 between adjacent heat transfer fins 222 to conduct heat transfer after fully contacting the heat transfer fins 222. The arrangement of multiple heat transfer fins 222 can form a larger contact area with the steam, which can quickly transfer heat on the one hand. On the other hand, the dispersed arrangement of multiple heat transfer fins 222 can also make the heat transfer surface more uniform, so that the heat at each position of the top plate 221 is uniform, thereby achieving rapid and uniform heating and heat preservation of the kettle body 10.

[0031] When the heat transfer fins 222 are arranged on the lower side wall of the top plate 221 in an arc-shaped structure, if the heat transfer fins 222 are perpendicular to the central axis of the kettle body 10, and the intervals 2220 between adjacent heat transfer fins 222 are also perpendicular to the central axis of the kettle body 10, after the steam enters the heat conduction cavity 200, the steam will flow along the intervals 2220 due to continuous entry. However, since there is no obstruction in the intervals 2220 formed in this form, the steam will flow quickly to the steam outlet 202, resulting in insufficient contact between the steam and the heat transfer fins 222, less heat transfer, and limited heating and heat preservation effects on the kettle body 10. Therefore, if Figure 4 As shown, in a preferred embodiment, the extension direction of the heat transfer fins 222 is parallel to the central axis of the kettle body 10. The multiple gaps 2220 formed in this form are arranged in sequence from top to bottom along the lower side wall of the top plate 221. Therefore, after the steam enters the heat transfer cavity 200, it will fill the above-mentioned gaps 2220 step by step. For example, the steam inlet 201 is set at the upper part of the bottom plate 21. The steam enters from the upper part of the heat transfer cavity 200. While filling the gaps 2220 of the previous level, the steam will move downward to the gaps 2220 of the next level and fill the gaps 2220 of the next level. All the gaps 2220 are filled in the above manner. The time for steam to overflow the gaps 2220 is extended, which can avoid the steam from flowing out of the gaps 2220 quickly. Therefore, the contact time of the steam with the heat transfer fins 222 and the top plate 221 is increased, the heat transfer time and heat transfer amount are improved, and the thermal efficiency of the steam is avoided.

[0032] Further, combined Figure 5 As shown, N partitions 223 are provided on the lower side wall of the top plate 221 and abut against the upper side wall of the bottom plate 21 to divide the heat transfer chamber 200 into N+1 heat transfer zones. Each heat transfer zone is provided with at least one steam inlet 201 and at least one steam outlet 202, where N≥1. Based on the above configuration, if a plurality of heat transfer fins 222 are provided on the lower side wall of the top plate 221 along the central axis of the kettle body 10, and a partition 223 is provided perpendicular to the heat transfer fins 222, the heat transfer chamber 200 is divided into two independent heat transfer zones. Each heat transfer zone has a pair of steam inlets 201 symmetrically provided on the upper portion of the bottom plate 21 and a steam outlet 202 provided on the lower portion of the bottom plate 21. By dividing the heat transfer chamber 200 into multiple heat transfer zones, the length of each interval 2220 can be shortened, that is, the steam filling time in each interval 2220 is shortened, and the efficiency of hot steam filling can be improved.

[0033] Furthermore, a groove (not shown) is provided on the upper side wall of the bottom plate 21, and the lower end of the partition 223 is embedded in the groove. The cooperation between the partition 223 and the groove can improve the sealing effect of each heat transfer zone.

[0034] like Figure 6As shown, in another embodiment of the present invention, based on the extension direction of the heat transfer fins 222 being parallel to the central axis of the kettle body 10, the heat transfer fins 222 have a turbulent flow structure, such as a wavy structure, which can increase the flow time of steam between adjacent heat transfer fins 222 and at the same time increase the contact area between the steam and the heat transfer fins 222, thereby increasing the heat transfer area.

[0035] In addition, the heat transfer mechanism 20 is provided with a clearance hole (not shown) for the support leg 11 of the kettle body 10 to pass through. The clearance hole and the heat conduction cavity 200 form a closed structure to prevent steam from overflowing.

[0036] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

Claims

1. A heat transfer structure of a partition wall evaporator, comprising a kettle body, characterized in that: It also includes a heat transfer mechanism disposed at the lower end of the kettle body, the heat transfer mechanism comprising: The bottom plate has an arc-shaped structure, and is provided with at least one steam inlet and at least one steam outlet. The top plate has an arc-shaped structure, the upper side wall of the top plate abuts against the lower end surface of the kettle body, and a plurality of heat transfer fins are arranged in parallel on the lower side wall of the top plate. The top plate is connected to the bottom plate through an upper sealing plate and a side sealing plate to form a heat conduction cavity, and a gap is formed between the heat transfer fins and the upper side wall of the bottom plate.

2. The heat transfer structure of the partition wall evaporator according to claim 1, characterized in that: The extending direction of the heat transfer fins is parallel to the central axis of the kettle body.

3. The heat transfer structure of the partition wall evaporator according to claim 2, characterized in that: The heat transfer fins have a flow-disturbing structure.

4. The heat transfer structure of the partition wall evaporator according to any one of claims 1 to 3, characterized in that: N partitions are provided on the lower side wall of the top plate and abut against the upper side wall of the bottom plate for dividing the heat transfer cavity into N+1 heat transfer zones, each of the heat transfer zones is provided with at least one steam inlet and at least one steam outlet, where N is a natural number greater than or equal to 1.

5. The heat transfer structure of the partition wall evaporator according to claim 4, characterized in that: A groove is provided on the upper side wall of the bottom plate, and the lower end of the partition is embedded in the groove.

6. The heat transfer structure of the partition wall evaporator according to claim 1, characterized in that: The steam outlet is arranged at the lower part of the bottom plate, and the steam inlet is arranged at the upper part of the bottom plate.

7. The heat transfer structure of the partition wall evaporator according to claim 1 or 6, characterized in that: The steam inlets are symmetrically provided on opposite side walls of the upper portion of the bottom plate.

8. The heat transfer structure of the partition wall evaporator according to claim 1, characterized in that: The bottom plate is made of stainless steel; the top plate and heat transfer fins are made of aluminum.

9. The heat transfer structure of the partition wall evaporator according to claim 1, characterized in that: The top plate is welded to the kettle body; the upper sealing plate and the side sealing plates are welded to the top plate and the bottom plate respectively.

10. The heat transfer structure of the partition wall evaporator according to claim 1, characterized in that: The heat transfer mechanism is provided with a clearance hole for the support legs of the kettle body to pass through, and the clearance hole and the heat conduction cavity form a closed structure.

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