CN219015042U

CN219015042U - Tube-row type reclaimed water heat exchanger with efficient heat exchange

Info

Publication number: CN219015042U
Application number: CN202223494938.2U
Authority: CN
Inventors: 尚德敏; 秦爽; 修国成; 李金峰
Original assignee: Hit Harbin Institute Of Technology Kint Technology Co ltd
Current assignee: Hit Harbin Institute Of Technology Kint Technology Co ltd
Priority date: 2022-12-27
Filing date: 2022-12-27
Publication date: 2023-05-12
Anticipated expiration: 2032-12-27

Abstract

A tube row type reclaimed water heat exchanger with high-efficiency heat exchange belongs to the technical field of heat exchangers. The utility model solves the problems that the welding workload of the tube bank of the existing tube bank type heat exchanger is large and the heat exchange coefficient of the medium water side is greatly influenced by the service time of the heat exchanger. Every two sets of banks that face each other from top to bottom are arranged in a left-right staggered way, every bank of tubes all includes a plurality of heat exchange tubes of welding as an organic whole side by side, every heat exchange tube's cross section all is half moon shape, and the plane side of every heat exchange tube all arranges up, the normal water inlet has been seted up at the casing top, the normal water delivery port has been seted up to the casing bottom, wait to heat the water inlet has been seted up to one end on the casing horizontal direction, wait to heat the water delivery port has been seted up to the other end, the one end and wait to heat the water inlet intercommunication setting of a plurality of heat exchange tubes, the other end and wait to heat the water delivery port intercommunication setting. Compared with the prior art, the welding workload is reduced by at least 50%, the heat exchange of the reclaimed water side is enhanced, and the influence of the use time of the heat exchanger on the heat exchange coefficient of the reclaimed water side is effectively reduced.

Description

Tube-row type reclaimed water heat exchanger with efficient heat exchange

Technical Field

The utility model relates to a tube-row type reclaimed water heat exchanger with efficient heat exchange, and belongs to the technical field of heat exchangers.

Background

Heat exchangers are a common heat exchange device in the civil and modern industry, and the heat exchangers have a wide range of applications, for example: in refrigeration systems, plate heat exchangers can be used for plate condensers and plate evaporators; the heating ventilation air conditioner is used for being matched with an intermediate heat exchanger used by a boiler, and is used for an intermediate heat exchanger of a high-rise building; in the chemical industry, the device is used for soda industry, ammonia synthesis, alcohol fermentation, material cooling, heating, evaporation concentration, condensation and heat recovery; in the metallurgical industry, the method is used for cooling a steelmaking process, recovering waste heat of slag flushing water and whitening smoke; in the mechanical industry, the cooling device is used for cooling various quenching liquids, cooling lubricating oil of a speed reducer and cooling emulsion; in the power industry, the cooling device is used for cooling bearing oil of a generator, cooling high-voltage transformer oil, a central cooling system and the like; in the paper industry, the method is used for heat recovery in a bleaching process, heating the washing slurry, cooling black liquor and condensing wood pulp; in the textile industry, the method is used for boiling nitrocellulose cooling and viscose alkali water cooling; in petroleum industry, the device is used for heating and cooling various oil products, condensing and cooling tower top gas and treating a factory cooling water system; in the food and medicine industry, the liquid food and fruit juice sterilizing, cooling, evaporating and crystallizing agent is used for heating, evaporating, condensing, sterilizing and cooling various liquid medicine; the central heating system is used for heating areas of thermal power plants, heating bath living water, district central heating and the like.

In practical application, the heat exchanger often encounters a problem, namely clean water which is not pure, or treated sewage, namely normal water, which enters the common plate heat exchanger, often is used for a long time, and fouling and even blockage can occur, so that the efficiency of the plate heat exchanger is reduced by a light person, and the plate heat exchanger cannot work because of being fragile by a heavy person.

In order to solve the reliability of reclaimed water heat exchange, the prior art realizes reclaimed water heat exchange by utilizing a tube row formed by welding a plurality of flat tubes side by side, and the clear water is moved in the tube and the reclaimed water or sewage is moved outside the tube. Although the tube row type heat exchanger solves the problem that the common plate type heat exchanger is easy to scale, the tube row type heat exchanger has two important defects, namely, the tube row welding workload of the heat exchanger is large, the length of a welding seam of a standard reclaimed water heat exchanger with 150 square meters reaches 2.5 kilometers, and the harm to the health and the environment of workers is too large due to waste gas generated by welding; secondly, the heat exchange coefficient of the reclaimed water side is greatly influenced by the service time of the heat exchanger, and the reclaimed water side is easy to pollute after long service time, so that the heat exchange coefficient of the reclaimed water side is reduced.

Disclosure of Invention

The utility model aims to solve the problems that the welding workload of the tube rows of the conventional tube row type heat exchanger is large and the heat exchange coefficient of the medium water side is greatly influenced by the service time of the heat exchanger, and further provides a tube row type medium water heat exchanger with high-efficiency heat exchange.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a tube row type reclaimed water heat exchanger with high-efficiency heat exchange comprises a shell and a plurality of tube rows sequentially arranged in the shell from top to bottom, wherein every two adjacent tube rows are arranged in a left-right staggered mode, each tube row comprises a plurality of heat exchange tubes welded into a whole side by side, the cross section of each heat exchange tube is half-moon-shaped, the plane side of each heat exchange tube is upward,

the top of the shell is provided with a reclaimed water inlet, the bottom of the shell is provided with a reclaimed water outlet, one end of the shell in the horizontal direction is provided with a water inlet to be heated, the other end is provided with a water outlet to be heated,

one end of each heat exchange tube is communicated with the water inlet of the water to be heated, and the other end is communicated with the water outlet of the water to be heated.

Further, the planar side width of the heat exchange tube is set to be greater than or equal to the diameter of the arc-shaped side.

Further, a water diversion box is arranged at one end inside the shell, and one ends of the heat exchange tubes are communicated with the water inlet of water to be heated through the water diversion box.

Further, a water collecting tank is arranged at the other end of the inside of the shell, and the other ends of the heat exchange tubes are communicated with the water outlet of the water to be heated through the water collecting tank.

Further, the water inlet to be heated is arranged at the lower part of one end of the shell, and the water outlet to be heated is arranged at the upper part of the other end of the shell.

Further, the reclaimed water inlet is arranged at one side close to the water inlet to be heated, and the reclaimed water outlet is arranged at one side close to the water outlet to be heated.

Further, the number of heat exchange tubes in each tube bank was 50.

Further, the diameter of each heat exchange tube was 20mm.

Further, the clearance between each two adjacent tube rows is 10 mm-40 mm.

Further, the heat exchange tube is made of carbon steel or stainless steel.

Compared with the prior art, the utility model has the following effects:

compared with the prior art, the welding workload is reduced by 50%, the heat exchange area of the reclaimed water side is effectively increased, the heat exchange of the reclaimed water side is enhanced, the influence of the use duration of the heat exchanger on the heat exchange coefficient of the reclaimed water side is effectively reduced, and the heat exchange efficiency is effectively improved. Specifically:

only one welding seam exists between every two adjacent heat exchange tubes in the application, and compared with the heat exchange tubes adopting the flat tube structure in the prior art, the welding workload and the welding rod use amount are greatly reduced while the phenomenon of anoxic corrosion caused by reclaimed water scale between the heat exchange tubes is effectively avoided. At least two welding seams are arranged between every two adjacent flat pipes in the prior art, so that the phenomenon of anoxic corrosion caused by medium water scale between the two adjacent flat pipes can be avoided. In the application, only one welding line is arranged between two adjacent heat exchange tubes, so that the welding workload and the welding rod consumption are reduced by at least half, the labor intensity is greatly reduced, the production cost is reduced, and the environmental pollution is effectively reduced;

the heat exchange tube with the half-moon cross section is adopted in the application, compared with the rectangular surface in the prior art, the arc surface of the heat exchange tube is more beneficial to the passing of reclaimed water flow through due to the design of the arc surface, and then the occurrence of reclaimed water scale phenomenon between two adjacent heat exchange tubes is effectively avoided. Meanwhile, the heat exchange area of the heat exchange tube with the half-moon cross section in the application is effectively increased compared with that of a flat tube type heat exchange tube in the prior art, and when reclaimed water exchanges heat with water to be heated, the heat exchange of the reclaimed water side is effectively enhanced.

Drawings

FIG. 1 is a schematic front view (partially cut-away) of the present application;

fig. 2 is a schematic side view of the present application (partially cut away, with the reclaimed water inlet and the reclaimed water outlet not shown).

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1-2, and the tube bundle type reclaimed water heat exchanger with high heat exchange efficiency comprises a shell 1 and a plurality of tube bundles 2 sequentially arranged in the shell 1 from top to bottom, wherein each two adjacent tube bundles 2 are arranged in a left-right staggered manner, each tube bundle 2 comprises a plurality of heat exchange tubes 21 welded into a whole side by side, the cross section of each heat exchange tube 21 is in a half-moon shape, the plane side of each heat exchange tube 21 is arranged upwards,

the top of the shell 1 is provided with a reclaimed water inlet 3, the bottom of the shell 1 is provided with a reclaimed water outlet 4, one end of the shell 1 in the horizontal direction is provided with a water inlet 5 to be heated, the other end is provided with a water outlet 6 to be heated,

one end of each heat exchange tube 21 is communicated with the water inlet 5 of the water to be heated, and the other end is communicated with the water outlet 6 of the water to be heated.

Every two groups of tube rows 2 which are adjacent from top to bottom are arranged in a left-right staggered way, namely: one group of tube rows 2 are fixedly connected on the left side wall 11 of the shell 1 by the left side, the other group of tube rows 2 are fixedly connected on the right side wall 12 of the shell 1 by the right side, and a plurality of groups of tube rows 2 which are sequentially arranged up and down form a serpentine channel so as to facilitate the reclaimed water to flow downwards.

And (3) reclaimed water flow:

the reclaimed water enters the shell 1 from the reclaimed water inlet 3, firstly flows transversely from left to right in the space above the first group of tube rows 2 along the horizontal direction, flows into the space between the first group of tube rows 2 and the right side wall 12 of the shell, flows downwards in a reversing way, enters the space between the first group of tube rows 2 and the second group of tube rows 2, flows transversely from right to left, flows downwards in sequence in a circulating way, and finally flows out from the reclaimed water outlet 4 at the bottom.

The flow of water to be heated is as follows:

the water to be heated enters the heat exchanger from the water inlet 5 of the water to be heated, enters the heat exchange tubes 21 in the plurality of groups of tube rows 2 at the same time, exchanges heat with reclaimed water outside the heat exchange tubes 21, and is finally discharged through the water outlet 6 of the water to be heated.

The cross section of heat exchange tube 21 in this application personally submits half moon shape, and the plane is last, and the arcwall face is under, prevents effectively that reclaimed water from taking place the dirt deposit in the flow in-process, effectively prolongs the life of heat exchanger, also is convenient for the dirt clearance simultaneously.

Compared with the prior art, the welding workload is reduced by at least 50%, the heat exchange area of the reclaimed water side is effectively increased, and the heat exchange of the reclaimed water side is enhanced. Specifically:

in this application only one welding seam has between every two adjacent heat exchange tubes 21, compares with the heat exchange tube that adopts flat tube structure among the prior art, when effectively avoiding reclaimed water scale to cause the oxygen deficiency to corrode the phenomenon to take place between the heat exchange tube, welding work load and welding rod use amount all significantly reduce. At least two welding seams are arranged between every two adjacent flat pipes in the prior art, so that the phenomenon of anoxic corrosion caused by medium water scale between the two adjacent flat pipes can be avoided. In the application, only one welding line is arranged between two adjacent heat exchange tubes 21, so that the welding workload and the welding rod consumption are reduced by at least half, the labor intensity is greatly reduced, the production cost is reduced, and the environmental pollution is effectively reduced;

the heat exchange tube 21 with the half-moon cross section is adopted in the application, and compared with the rectangular surface in the prior art, the arc surface of the heat exchange tube 21 is more beneficial to the passing of reclaimed water flow through due to the design of the arc surface, so that the phenomenon of reclaimed water scale between two adjacent heat exchange tubes is effectively avoided. Meanwhile, the heat exchange area of the heat exchange tube 21 with the half-moon cross section in the application is effectively increased compared with that of a flat tube type heat exchange tube in the prior art, and the heat exchange of reclaimed water and water to be heated is effectively enhanced.

Assuming that the diameter of the half-moon shaped heat exchange tube 21 in the present application is equal to the width of the flat tube type heat exchange tube in the prior art, denoted as D, the arc length of the half-moon shaped heat exchange tube 21 is 0.5×3.14×d, and it is known through calculation that: the arc-shaped area of the half-moon-shaped heat exchange tube 21 is 57% more than the single-sided area of the flat tube.

The flat side width of the heat exchange tube 21 is set to be greater than or equal to the diameter of the arc side. By the design, no dead angle is ensured after welding two adjacent heat exchange pipes 21, the plane sides of the heat exchange pipes 21 are aligned and welded, and the two adjacent arc surfaces are in smooth transition.

A water diversion box 7 is arranged at one end inside the shell 1, and one ends of a plurality of heat exchange tubes 21 are communicated with the water inlet 5 of water to be heated through the water diversion box 7. So designed, wait to heat water inlet 5 and water knockout drum intercommunication, the one end of a plurality of heat exchange tubes 21 all communicates with the water knockout drum, wait to heat water and get into the water knockout drum through waiting to heat water inlet 5 earlier, get into a plurality of heat exchange tubes 21 in again simultaneously, be convenient for wait to heat distribution of water.

The other end inside the shell 1 is provided with a water collecting tank 8, and the other ends of the heat exchange tubes 21 are communicated with the water outlet 6 of the water to be heated through the water collecting tank 8. So designed, the water to be heated in the heat exchange tubes 21 horizontally flows to the water collection tank and finally flows out from the water outlet 6 of the water to be heated.

The water inlet 5 to be heated is arranged at the lower part of one end of the shell 1, and the water outlet 6 to be heated is arranged at the upper part of the other end of the shell 1.

The reclaimed water inlet 3 is arranged at one side close to the water inlet 5 to be heated, and the reclaimed water outlet 4 is arranged at one side close to the water outlet 6 to be heated.

The number of heat exchange tubes in each tube bank is 50. So design, effectively promote heat exchange efficiency when guaranteeing bank of tubes joint strength.

The diameter of each heat exchange tube is 20mm.

The clearance between each two adjacent groups of tube rows is 10 mm-40 mm. So design, provide effectual rivers space for the normal water in the time of guaranteeing heat exchange efficiency. The clearance is the vertical distance between the top end of each group of tube rows and the bottom end of the tube row above the group of tube rows.

The heat exchange tube is made of carbon steel or stainless steel.

Claims

1. A high-efficient heat transfer's bank of tubes formula reclaimed water heat exchanger, its characterized in that: comprises a shell (1) and a plurality of groups of tube rows (2) which are sequentially arranged in the shell (1) from top to bottom, wherein each two groups of tube rows (2) which are adjacent from top to bottom are arranged in a left-right staggered manner, each group of tube rows (2) comprises a plurality of heat exchange tubes (21) which are welded into a whole side by side, the cross section of each heat exchange tube (21) is half-moon-shaped, the plane side of each heat exchange tube (21) is upwards arranged,

a reclaimed water inlet (3) is formed in the top of the shell (1), a reclaimed water outlet (4) is formed in the bottom of the shell (1), a water inlet (5) to be heated is formed in one end of the shell (1) in the horizontal direction, a water outlet (6) to be heated is formed in the other end of the shell,

one end of each heat exchange tube (21) is communicated with the water inlet (5) to be heated, and the other end is communicated with the water outlet (6) to be heated.

2. The efficient heat exchange tube bank type reclaimed water heat exchanger as claimed in claim 1, wherein: the width of the plane side of the heat exchange tube (21) is larger than or equal to the diameter of the arc side.

3. A tube bank type reclaimed water heat exchanger capable of efficiently exchanging heat according to claim 1 or 2, wherein: a water distribution box (7) is arranged at one end inside the shell (1), and one ends of the heat exchange tubes (21) are communicated with the water inlet (5) to be heated through the water distribution box (7).

4. A tube-side-by-side water heat exchanger for efficient heat exchange as claimed in claim 3, wherein: the other end inside the shell (1) is provided with a water collecting tank (8), and the other ends of the heat exchange tubes (21) are communicated with the water outlet (6) of the water to be heated through the water collecting tank (8).

5. A tube bank type reclaimed water heat exchanger capable of efficiently exchanging heat according to claim 1, 2 or 4, wherein the heat exchanger is characterized in that: the water inlet (5) for water to be heated is arranged at the lower part of one end of the shell (1), and the water outlet (6) for water to be heated is arranged at the upper part of the other end of the shell (1).

6. The efficient heat exchange tube bank type reclaimed water heat exchanger as claimed in claim 5, wherein: the reclaimed water inlet (3) is arranged at one side close to the water inlet (5) to be heated, and the reclaimed water outlet (4) is arranged at one side close to the water outlet (6) to be heated.

7. A tube bank type reclaimed water heat exchanger capable of efficiently exchanging heat according to claim 1, 2, 4 or 6, wherein: the number of heat exchange tubes in each tube bank is 50.

8. The efficient heat exchange tube bank type reclaimed water heat exchanger as claimed in claim 7, wherein: the diameter of each heat exchange tube is 20mm.

9. A tube bank type reclaimed water heat exchanger capable of efficiently exchanging heat according to claim 1, 2, 4, 6 or 8, wherein: the clearance between each two adjacent groups of tube rows is 10 mm-40 mm.

10. The efficient heat exchange tube bank type reclaimed water heat exchanger as claimed in claim 1, wherein: the heat exchange tube is made of carbon steel or stainless steel.