CN215387612U

CN215387612U - Horizontal falling film heat exchanger

Info

Publication number: CN215387612U
Application number: CN202121782282.7U
Authority: CN
Inventors: 李亮亮; 李胜; 刘璐; 李健凯
Original assignee: Zhongjielan Environmental Protection Technology Co ltd
Current assignee: Zhongjielan Environmental Protection Technology Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2022-01-04
Anticipated expiration: 2031-08-02

Abstract

The embodiment of the utility model discloses a horizontal falling film heat exchanger, which comprises a main body structure, wherein the bottom of the main body structure is provided with a support frame, and the horizontal falling film heat exchanger is characterized in that a liquid homogenizing pipe is arranged in the main body structure and is close to the position above the main body structure, the liquid homogenizing pipe is communicated with a circulating feed inlet on the outer side of the main body structure, a heat exchange device is arranged below the liquid homogenizing pipe and consists of a plurality of metal pipes, a plurality of nozzles corresponding to the heat exchange device are arranged on the liquid homogenizing pipe, two sides of the heat exchange device are respectively connected with a steam inlet box and a non-condensed steam outlet box which are arranged at two ends of the main body structure, a steam outlet is arranged at the top of the main body structure, a mixing tank is arranged at the bottom of the main body structure, condensed water of a heating system is mixed by the mixing tank, then is connected with the circulating feed inlet through a circulating pump through a circulating discharge port, enters an evaporator for evaporation, the circulating work can be realized, and the thorough separation can be ensured, the medium can be recycled in the system, and the working efficiency is high.

Description

Horizontal falling film heat exchanger

Technical Field

The embodiment of the utility model relates to the technical field of evaporation equipment, in particular to a horizontal falling film heat exchanger.

Background

The falling film evaporation is that the feed liquid is added from an upper pipe box of a heating chamber of the falling film evaporator, is uniformly distributed into each heat exchange pipe through a liquid distribution and film forming device, and flows from top to bottom in a uniform film shape under the action of gravity, vacuum induction and airflow. In the flowing process, the shell-pass heating medium is heated and vaporized, the generated steam and the liquid phase enter a separation chamber of the evaporator together, the steam and the liquid are fully separated, the steam enters a condenser for condensation (single-effect operation) or enters a next-effect evaporator as the heating medium, so that the multi-effect operation is realized, and the liquid phase is discharged from the separation chamber.

Falling film evaporators are used in the field of chemical industry and environmental protection, and are mainly used in the process of separating out salt after fully washing a solution containing soluble salt. The existing falling film evaporation equipment is a large-scale vertical falling film evaporator and is transmitted to a liquid distribution disc through a plurality of conveying pipes, the liquid distribution disc is utilized for carrying out evaporation after liquid equalization, the process operation is complex, the parts of equipment products are numerous, the process requirement on the liquid distribution disc equipment is high, therefore, the problems of poor sealing performance, high maintenance cost and the like easily caused by connecting parts between the equipment are solved, meanwhile, the existing evaporation equipment is made of metal materials, the evaporation equipment products are heavy, meanwhile, crystals are easily gathered on the surface of the equipment due to the characteristics of the metal materials, the equipment is corroded, and the service life of the equipment is shortened.

SUMMERY OF THE UTILITY MODEL

Therefore, the embodiment of the utility model provides a horizontal falling film heat exchanger to solve the problems of high maintenance cost and low efficiency caused by heavy falling film evaporation equipment and complex process in the prior art.

In order to achieve the above object, an embodiment of the present invention provides the following:

in a first aspect of embodiments of the present invention, there is provided a horizontal falling film heat exchanger comprising a body structure, the bottom of the main body structure is provided with a supporting frame, a liquid equalizing pipe is arranged in the main body structure and close to the upper part of the main body structure, the liquid homogenizing pipe is communicated with a circulating feed inlet on the outer side of the main body structure, a heat exchange device is arranged below the liquid homogenizing pipe, the heat exchange device consists of a plurality of metal pipes, a plurality of nozzles corresponding to the heat exchange device are arranged on the liquid equalizing pipe, two sides of the heat exchange device are respectively connected with a steam inlet box and a non-condensable gas outlet box which are arranged at two ends of the main body structure, the top of the main body structure is provided with a steam outlet, the bottom of the main body structure is provided with a mixing tank communicated with the main body structure, the mixing tank is provided with a heating system condensate water inlet, a water replenishing port and a circulating discharge port, and the circulating discharge port is connected with the circulating feed port through a circulating pump.

Furthermore, the condensed water inlet and the water replenishing port of the heating system are positioned on the upper side of the mixing tank, and have a height difference with the circulating discharge port.

Furthermore, an upper limit liquid level meter and a lower limit liquid level meter are arranged on the mixing tank, and the upper limit liquid level meter is as high as the condensed water inlet and the water replenishing port of the heating system.

Further, a thermometer port is further arranged on the mixing tank, and the height of the thermometer port is the same as that of the lower limit liquid level meter.

Further, an electric heater is arranged in the mixing tank.

Furthermore, the heat exchange device comprises an upper heat exchange area and a lower heat exchange area, the upper heat exchange area is communicated with the non-condensed steam outlet, and the lower heat exchange area is communicated with the sludge steam inlet and the sludge steam condensate outlet.

Furthermore, a sludge steam inlet, a noncondensable gas outlet and a sludge steam condensate outlet are also arranged on the steam inlet box.

Furthermore, a partition plate is arranged in the steam inlet box, separates the non-condensed steam outlet from the sludge steam inlet and the sludge steam condensate outlet, and is respectively communicated with an upper heat exchange area and a lower heat exchange area of the heat exchange device.

Further, the nozzles are arranged in two rows, and the distance between the two rows of nozzles is one third of the maximum width of the main body framework.

Furthermore, the metal tubes of the heat exchange device are arranged in a plurality of rows in an overlapping manner, the metal tubes in adjacent rows are staggered, and the number of the metal tubes in the upper heat exchange area is more than that of the metal tubes in the lower heat exchange area.

According to the embodiment of the utility model, the evaporation equipment has the following advantages: comprises a main body structure, a supporting frame is arranged at the bottom of the main body structure, and is characterized in that a liquid homogenizing pipe is arranged at a position close to the upper part inside the main body structure, the liquid homogenizing pipe is communicated with a circulating feed inlet at the outer side of the main body structure, a heat exchange device is arranged below the liquid homogenizing pipe, the heat exchange device is composed of a plurality of metal pipes, a plurality of nozzles corresponding to the heat exchange device are arranged on the liquid homogenizing pipe, two sides of the heat exchange device are respectively connected with a steam inlet box and a non-condensed steam outlet box which are arranged at two ends of the main body structure, a steam outlet is arranged at the top of the main body structure, the bottom of the main body structure is provided with the mixing tank, the mixing tank mixes the condensed water of the heating system, the condensed water is connected with the circulating feed inlet through the circulating discharge port and the circulating pump and enters the evaporator for evaporation, and moreover, the circulation work can be realized, the thorough separation is ensured, the medium can be recycled in the system, and the working efficiency is high.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.

Fig. 1 is a schematic diagram of an internal structure of a horizontal falling film heat exchanger according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a part of a horizontal falling film heat exchanger in a sectional view from a-a direction.

In the figure: 1. a body structure; 2. a support frame; 3. a liquid equalizing pipe; 4. a circulating feed inlet; 5. a heat exchange device; 6. a nozzle; 7. a steam inlet; 8. a noncondensable gas outlet; 9. a sludge steam condensate outlet; 10. a steam outlet; 11. a mixing tank; 12. a condensed water inlet of the heating system; 13. a water replenishing port; 14. a circular discharge hole; 15. an upper limit liquid level meter; 16. a lower limit level gauge; 17. a thermometer port; 18. an electric heater; 19. a separator.

Detailed Description

The present invention is described in terms of particular embodiments, other advantages and features of the utility model will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the utility model and that it is not intended to limit the utility model to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for clarity of description only, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship therebetween may be regarded as the scope of the present invention without substantial changes in the technical contents.

As shown in fig. 1, fig. 1 shows a horizontal falling film heat exchanger provided by an embodiment of the present invention, which includes a main body structure 1, a support frame 2 is provided at the bottom of the main body structure 1, a liquid homogenizing pipe 3 is provided at a position near the upper portion of the inside of the main body structure 1, the liquid homogenizing pipe 3 is communicated with a circulation feed inlet 4 at the outer side of the main body structure 1, a heat exchanging device 5 is provided below the liquid homogenizing pipe 3, the heat exchanging device 5 is composed of a plurality of metal pipes, a plurality of nozzles 6 corresponding to the heat exchanging device 5 are provided on the liquid homogenizing pipe 3, two sides of the heat exchanging device 5 are respectively connected with a steam inlet box and a non-condensed steam outlet box provided at two ends of the main body structure 1, a steam outlet 10 is provided at the top of the main body structure 1, a mixing tank 11 communicated with the bottom of the main body structure 1 is provided at the bottom of the main body structure 1, a heating system condensed water inlet 12 is provided on the mixing tank 11, a water replenishing opening 13 and a circulation discharge opening 14, wherein the circulation discharge opening 14 is connected with the circulation feed opening 4 through a circulation pump (not shown).

This evaporation equipment sets up blending tank 11 through the bottom at major structure 1, and blending tank 11 passes through circulating pump connection circulation feed inlet 4 through circulation discharge gate 14 after mixing the heating system comdenstion water, gets into the evaporation in the evaporimeter to, can realize the cycle work, guarantee the thorough of separation, the medium homoenergetic is circulated in the system and is used, and work efficiency is high.

Wherein, the heating system condensate inlet 12 and the water replenishing port 13 are located on the upper side of the mixing tank 11, and have a height difference with the circulating discharge port 14, and can store a certain amount of mixed liquid to enter the main structure 1 again for evaporation.

An upper limit liquid level meter 15 and a lower limit liquid level meter 16 are arranged on the mixing tank 11, and the upper limit liquid level meter 15 is as high as the condensed water inlet 12 and the water replenishing port 13 of the heating system.

The mixing tank 11 is also provided with a temperature gauge 17, the temperature gauge 17 is as high as the lower limit liquid level gauge 16, and the mixing tank 11 is internally provided with an electric heater 18 which can heat the mixed liquid in a relatively low temperature state of the mixed liquid so as to improve the subsequent evaporation efficiency.

As shown in fig. 2, the heat exchanger 5 includes an upper heat exchange area and a lower heat exchange area, the upper heat exchange area is communicated with the non-condensed water outlet 8, and the lower heat exchange area is communicated with the sludge steam condensed water outlet 9.

Wherein, also be equipped with mud steam inlet 7, noncondensable gas export 8 and mud steam condensate outlet 9 on the steam inlet box, can improve the rapid discharge of comdenstion water and noncondensable gas after the evaporation.

In the specific structure, a partition plate 19 is arranged in the steam inlet box, the non-condensed steam outlet 8 is separated from the sludge steam inlet 7 and the sludge steam condensate outlet 9 and is respectively communicated with the upper heat exchange area and the lower heat exchange area of the heat exchange device 5, so that the hot steam passes through the lower heat exchange area and the upper heat exchange area in sequence to fully evaporate the mixed liquid.

Referring to fig. 2 again, the nozzles 6 are arranged in two rows, the distance between the two rows of nozzles 6 is one third of the maximum width of the main framework, the evaporation efficiency is improved, the sprayed mixed liquid can cover all areas of the heat exchange device 5, and the utilization rate of hot steam is improved.

Specifically, the metal tubes of the heat exchange device 5 are arranged in a plurality of rows in an overlapping manner, the metal tubes of adjacent rows are staggered with each other, and the number of the metal tubes of the upper heat exchange area is more than that of the metal tubes of the lower heat exchange area.

In the embodiment, in the working process, the condensed water of the heating system enters the mixing tank 11 through the condensed water inlet 12 of the heating system, meanwhile, the circulating water enters the mixing tank 11 through the water replenishing port 13, the flow rates of the two are the same, when the upper limit liquid level meter 15 detects the liquid level height, the circulating pump is started to pump the mixed liquid into the circulating feed inlet 4 through the circulating feed outlet 14 and enter the liquid equalizing pipe 3, meanwhile, the high-temperature steam in the drying machine enters the heat exchange device 5 through the sludge steam inlet 7, the nozzle 6 sprays the mixed liquid onto the heat exchange device 5, the solution is evaporated, the steam is discharged through the steam outlet 10, the steam outlet 10 can be connected with the compressor to improve the steam temperature and circulate to the inside of the system, the sludge steam condensed water and the non-condensable gas formed by the steam in the heat exchange device 5 are respectively discharged through the sludge steam condensed water outlet 9 and the non-condensable gas outlet 8, the sludge steam condensed water can be connected with the water replenishing port 13 to circulate to the inside of the system again, in the circulation process of the system, if the liquid level in the mixing tank 11 reaches the lower limit liquid level meter 16, the water replenishing port 13 replenishes water, and the purpose of rapid and efficient evaporation is achieved.

Although the utility model has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the utility model. Accordingly, such modifications and improvements are intended to be within the scope of the utility model as claimed.

Claims

1. A horizontal falling film heat exchanger comprises a main body structure, wherein a support frame is arranged at the bottom of the main body structure, it is characterized in that a liquid equalizing pipe is arranged in the main body structure and close to the upper part of the main body structure, the liquid equalizing pipe is communicated with a circulating feed inlet at the outer side of the main body structure, a heat exchange device is arranged below the liquid equalizing pipe, the heat exchange device consists of a plurality of metal pipes, a plurality of nozzles corresponding to the heat exchange device are arranged on the liquid equalizing pipe, two sides of the heat exchange device are respectively connected with a steam inlet box and a non-condensed steam outlet box which are arranged at two ends of the main body structure, the top of the main body structure is provided with a steam outlet, the bottom of the main body structure is provided with a mixing tank communicated with the main body structure, the mixing tank is provided with a heating system condensate water inlet, a water replenishing port and a circulating discharge port, and the circulating discharge port is connected with the circulating feed port through a circulating pump.

2. The horizontal falling film heat exchanger according to claim 1, wherein the heating system condensate water inlet and the water replenishing port are positioned at the upper side of the mixing tank and have a height difference with the circular discharge port.

3. A horizontal falling film heat exchanger according to claim 2, wherein the mixing tank is provided with an upper limit liquid level meter and a lower limit liquid level meter, and the upper limit liquid level meter and a condensed water inlet and a water replenishing port of the heating system are arranged at the same height.

4. A horizontal falling film heat exchanger according to claim 3 wherein the mixing tank is further provided with a temperature gauge port at the same height as the lower level gauge.

5. A horizontal falling film heat exchanger according to any one of claims 1 to 4 wherein an electric heater is provided within the mixing tank.

6. The horizontal falling film heat exchanger of claim 1, wherein the heat exchange means comprises an upper heat exchange zone and a lower heat exchange zone, the upper heat exchange zone is in communication with the non-condensed water outlet, and the lower heat exchange zone is in communication with the sludge steam inlet and the sludge steam condensate outlet.

7. The horizontal falling film heat exchanger according to claim 6, wherein the steam inlet box is also provided with a steam inlet, a non-condensable gas outlet and a distilled water outlet.

8. The horizontal falling film heat exchanger of claim 7, wherein a partition is arranged in the steam inlet box to separate the non-condensed steam outlet from the sludge steam inlet and the sludge steam condensate outlet, and the non-condensed steam outlet is communicated with the upper heat exchange area and the lower heat exchange area of the heat exchange device respectively.

9. The horizontal falling film heat exchanger of claim 6, wherein the nozzles are arranged in two rows, the distance between the two rows of nozzles being one third of the maximum width of the body frame.

10. The horizontal falling film heat exchanger of claim 9, wherein the metal tubes of the heat exchange unit are arranged in a plurality of rows in an overlapping manner, the metal tubes of adjacent rows are staggered with respect to each other, and the number of the metal tubes of the upper heat exchange area is greater than that of the metal tubes of the lower heat exchange area.