CN211651361U

CN211651361U - Spray water inlet type shell-and-tube heat exchanger

Info

Publication number: CN211651361U
Application number: CN202020059084.7U
Authority: CN
Inventors: 杨洪才; 张国杰
Original assignee: Shandong Jirong Thermal Engineering Technology Co ltd
Current assignee: Shandong Jirong Thermal Engineering Technology Co ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-10-09
Anticipated expiration: 2030-01-13

Abstract

The utility model provides a vibration fragile and the easy short circuit of the inside water of heat exchanger that causes of inlet port department tube bank causes is not high problem greatly in order to solve the inflow, the utility model provides a spray water inlet type shell and tube heat exchanger, including the casing, locate the tube sheet at casing both ends and be located the tube case in the tube sheet outside, locate the heat exchange tube between two tube sheets and set up in the inside baffling board of casing, its characterized in that, the internal diameter of casing water inlet position is greater than other position internal diameters to be provided with the water conservancy diversion spray cylinder that is used for reducing water pressure and average velocity of flow in the water inlet below of casing, water conservancy diversion spray cylinder fixed connection is between baffling board and the tube sheet near casing water inlet.

Description

Spray water inlet type shell-and-tube heat exchanger

Technical Field

The utility model relates to a heat exchanger technical field, in particular to spray formula shell and tube heat exchanger of intaking.

Background

At present, because the water inflow is big, the large-scale water-water cooler commonly used adopts and sets up the protecting board in water inlet department, and the big impulsive force of the big velocity of flow of water inlet department is great, and ordinary protecting board can not effectively reduce the impact of intaking to the tube bank, and the vibration is big, can not evenly intake, and equipment operation is unstable. If increase the casing diameter, reduce the velocity of flow of intaking, can cause the heat exchange tube not the regional increase of stringing in the barrel, easily cause the water short circuit, greatly reduced heat exchanger's heat exchange efficiency. The heat exchange tube is easily damaged by vibration caused by large-flow water inlet impact, so that the service life of the whole heat exchanger is greatly shortened.

Disclosure of Invention

In order to solve the problem that the vibration fragile of the department's of water inlet pipe bundle and the easy short circuit of the inside water of heat exchanger caused is high enough to cause the inflow greatly, the utility model provides a spray water inlet type shell and tube heat exchanger, the technical scheme of adoption as follows:

the utility model provides a spray formula shell and tube heat exchanger of intaking, includes the casing, locate the tube sheet at casing both ends and be located the tube case in the tube sheet outside, locate the heat exchange tube between two tube sheets and set up the baffling board inside the casing, its characterized in that, the internal diameter of casing water inlet position is greater than other positions internal diameters to be provided with the water conservancy diversion spray column that is used for reducing water pressure and average velocity of flow below the water inlet of casing, water conservancy diversion spray column fixed connection is between baffling board and the tube sheet near casing water inlet one end.

Preferably, the baffle plates are of a whole-plate structure, the gaps on the two adjacent baffle plates are respectively positioned at the middle upper part and the middle lower part of the baffle plates and are sequentially and alternately arranged, and the gap of the baffle plate connected with the flow guide spraying cylinder is positioned at the middle upper part.

Preferably, the upper end face of the diversion spray cylinder is of a cylindrical shell structure with a plane, and the surfaces of the middle upper part and the lower part of the diversion spray cylinder are provided with a plurality of open holes.

Preferably, a plurality of first holes are formed in the outer surface of the lower half part of the diversion spray cylinder within 180 degrees, a plurality of second holes are formed in the outer surface of the diversion spray cylinder within alpha degrees above the horizontal plane where the axis is located, the first holes are distributed at intervals of beta degrees in the circumferential direction, and the second holes are distributed at intervals of Lmm in the length direction of the diversion spray cylinder.

Preferably, the alpha range is 30-40 degrees.

Preferably, the diameter of the first opening is 20-30 mm.

Preferably, the diameter of the second opening is 10-15 mm.

Preferably, the beta is in a range of 4-5 degrees.

Preferably, the L range is 45-55 mm.

The beneficial effects of the utility model reside in that:

1. the diameter of the cylinder body at the water inlet of the shell is increased, and the horizontal plane at the upper end of the guide spraying cylinder is arranged, so that the passage area at the water inlet is increased, the water inlet flow speed is reduced, and the impact force of water flow on the pipe bundle is greatly reduced;

2. a diversion spray cylinder positioned in the shell is arranged below the water inlet, so that the inlet water does not directly impact the heat exchange tube, the inlet water flows along the circumferential direction of the diversion spray cylinder and enters the tube bundle through the openings uniformly distributed on the diversion spray cylinder, the inlet water flow velocity is greatly reduced and is more uniform, and the impact force on the heat exchange tube is greatly reduced;

3. the baffle plate gap which is close to one end of the water inlet and is connected with the diversion spray cylinder is positioned at the middle upper part, and the middle upper parts and the middle lower parts of the other baffle plates are sequentially distributed at intervals, so that the fluid is in a turbulent flow state, the flow channel is increased, the water flow speed is ensured, and the heat exchange effect is improved;

4. the baffle plate adopts a whole-plate structure, the gap is positioned at the middle upper part or the middle lower part, the support of the heat exchange pipe is enhanced, and meanwhile, the whole-plate structure reduces the leakage area, avoids the phenomenon of water flow short circuit and improves the heat transfer effect.

Drawings

FIG. 1 is a schematic view of the structure of the present invention

FIG. 2 is a schematic view of the housing structure

3 FIG. 3 3 3 is 3 a 3 sectional 3 view 3 taken 3 along 3 line 3 A 3- 3 A 3

FIG. 4 is a side view of a flow directing spray cylinder

FIG. 5 is a sectional view taken along line B-B

FIG. 6 is a schematic view of the first baffle plate

FIG. 7 is a schematic view of the second baffle plate

The heat exchange tube comprises a front-end tube box 1, a front tube plate 2, a water inlet 3, a shell 4, a heat exchange tube 5, a water outlet 6, a rear tube plate 7, a rear-end tube box 8, a guide spray cylinder 9, a baffle plate 10, a first baffle plate 1001, a second baffle plate 1002, a support channel steel 11, a notch 12, a first opening 13 and a second opening 14.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

The spray water inlet type shell-and-tube heat exchanger shown in fig. 1-7 mainly comprises a shell 4, a front tube plate 2, a rear tube plate 7, a front tube box 1, a rear tube box 8, a heat exchange tube 5 and a baffle plate 10, wherein the heat exchange tube 5 is fixedly connected between the front tube plate 2 and the rear tube plate 7, the heat exchange tube 5 is positioned inside the shell 4, the front tube plate 2 and the rear tube plate 7 are respectively welded at the left end and the right end of the shell 1, and the front tube box 1 and the rear tube box 8 are respectively connected at the left side and the right side of the front tube plate 2 and the rear tube.

The left end and the right end of the shell 1 are respectively provided with a water inlet 3 and a water outlet 6, the inner diameter of the water inlet 3 is larger than the inner diameters of other positions, so that the cylinder body of the water inlet 3 is enlarged, the channel area of the water inlet 3 is enlarged, the flow velocity of the inlet water is reduced, and the impact force of water flow on a tube bundle is greatly reduced, a flow guide spraying cylinder 9 is arranged below the position of the water inlet 3, the flow guide spraying cylinder 9 is coaxially distributed with the shell body 4 and fixedly connected between the front tube plate 2 and the leftmost baffle plate 10, the structure of the flow guide spraying cylinder 9 is shown in figures 3-5, the upper end of the flow guide spraying cylinder is a horizontal plane, the arrangement of the structure can increase the channel area of the water inlet 3 under the condition of the cylinder bodies with the same diameter, the flow velocity of the inlet water is reduced, a plurality of first open holes 13 with the diameter, the outer surface of the horizontal plane passing through the axis of the diversion spray cylinder 9 and facing upwards within the range of 35 degrees is provided with a second hole 14 with the diameter of 12mm, the two adjacent first holes 13 in the circumferential direction of the diversion spray cylinder 9 and the adjacent second holes 14 are distributed at an interval of 5 degrees, the two adjacent first holes 13 in the length direction of the diversion spray cylinder 9 and the adjacent second holes 14 are distributed at an interval of 50mm, water on the upper part of the diversion spray cylinder 9 cannot pass through and can only flow downwards along the outer wall, the holes from top to bottom are gradually enlarged, the speed of flowing fluid can be gradually reduced, and the impact force on the heat exchange pipe 5 is reduced.

In addition, the baffle plates 10 are of a whole plate structure, the two leftmost baffle plates 10 in the shell are a first baffle plate 1001 and a second baffle plate 1002 sequentially from left to right, the two plates are integrally of a circular plate structure and are connected with the inner wall of the shell 4 in a matched mode, a gap 12 is formed in the middle upper portion of the first baffle plate 1001, a gap 12 is formed in the middle lower portion of the second baffle plate 1002, the baffle plates 10 are uniformly distributed in the shell 4 from left to right, and the gaps between the two adjacent baffle plates 10 are distributed in a mode that the first baffle plate 1001 and the second baffle plate 1002 are arranged on the upper portion and the lower portion, so that fluid turbulence is increased.

The working principle of the structure is as follows:

the large flow water to be cooled enters the heat exchanger from the position of the water inlet 3 of the shell 4, the flow area of the flowing water is increased and the flow velocity of the flowing water is reduced due to the increase of the inner diameter of the water inlet 3 and the arrangement of the upper end plane structure of the flow guide spraying cylinder 9, the water flows onto the flow guide spraying cylinder 9 after the speed is reduced in sequence, the water flows along the outer wall of the flow guide spraying cylinder 9 and enters the tube bundle through the first opening 13 and the second opening 14 on the outer wall, the total equivalent diameter of the openings is larger than the cutoff diameter of the water inlet 3, so that the water flow is reduced for the second time, then the water flow enters the heat exchange tube 5 through the flow guide spraying cylinder 9, the impact of the water flow on the tube bundle is reduced, the vibration of the equipment is reduced, the water flow flows into the space between the first baffle 1001 and the second baffle 1002 from the gap 12 on the second baffle 1002 and then flows into the space between, the water flow carries out continuous baffling heat exchange on the tube bundle according to the mode, and the baffle plate 10 adopts a whole-plate structure, so that the water flow only passes through the heat exchange tubes, the leakage flow is reduced, and the heat exchange coefficient is improved.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements can be made, and these improvements should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a spray formula shell and tube heat exchanger of intaking, includes the casing, locate the tube sheet at casing both ends and be located the tube case in the tube sheet outside, locate the heat exchange tube between two tube sheets and set up the baffling board inside the casing, its characterized in that, the internal diameter of casing water inlet position is greater than other positions internal diameters to be provided with the water conservancy diversion spray column that is used for reducing water pressure and average velocity of flow below the water inlet of casing, water conservancy diversion spray column fixed connection is between baffling board and the tube sheet near casing water inlet one end.

2. The spray-feed shell and tube heat exchanger of claim 1 wherein the baffles are of a unitary plate construction, the notches of adjacent baffles are located at the upper and lower middle portions of the baffles and alternate in sequence, and the notch of the baffle associated with the flow directing spray cylinder is located at the upper and middle portions.

3. The spray water inlet type shell-and-tube heat exchanger of claim 1, wherein the diversion spray cylinder is of a cylindrical shell structure with a planar upper end surface, and a plurality of openings are arranged on the surfaces of the middle upper part and the middle lower part of the diversion spray cylinder.

4. A spray-in shell and tube heat exchanger as claimed in claim 1 wherein the outer surface of the lower half of the said flow directing sparger 180 ° is provided with a plurality of first openings, and the outer surface of the horizontal plane of the said axis is provided with a plurality of second openings within a range of α °, the said openings are distributed at intervals of β ° in the circumferential direction, and at intervals of Lmm in the length direction of the flow directing sparger.

5. A spray-feed shell and tube heat exchanger according to claim 4, wherein the α range is 30-40 °.

6. A spray water inlet type shell and tube heat exchanger according to claim 4, wherein the diameter of the first opening is 20-30 mm.

7. A spray water inlet type shell and tube heat exchanger according to claim 4, wherein the diameter of the second opening is 10-15 mm.

8. A spray-in water shell and tube heat exchanger according to claim 4, wherein β is in the range of 4-5 °.

9. A spray water inlet type shell and tube heat exchanger according to claim 4, wherein the L range is 45-55 mm.