CN-122015537-A - Modularized washable snake-shaped sleeve heat exchanger

CN122015537ACN 122015537 ACN122015537 ACN 122015537ACN-122015537-A

Abstract

The invention discloses a modularized washable snake-shaped double-pipe heat exchanger, which belongs to the technical field of heat exchange equipment, and comprises at least one group of heat exchange modules, wherein fluid conveying pipelines for connecting the heat exchange modules in parallel are arranged at two ends of each heat exchange module, each heat exchange module comprises a plurality of inner pipes which are arranged in parallel, a plurality of outer pipes which are coaxially sleeved on the inner pipes, two ends of each inner pipe penetrate out of the outer pipe, sealing plates for enabling the inner pipes to pass through are arranged at two ends of each outer pipe, a sealed interlayer space is formed by the inner walls of the outer pipes, the outer walls of the inner pipes and the sealing plates in a surrounding mode, adjacent outer pipes are communicated through first connecting pipes to form a first fluid channel which is in a snake-shaped turning-back mode, a turbulent inner core which is arranged inside the inner pipes in a drawable mode, and a detachable connecting structure for connecting the plurality of inner pipes in series to form a second fluid channel which is in a snake-shaped turning-back mode, and the installation and detachment of the turbulent inner core is facilitated. Solves the problems of difficult cleaning, limited heat exchange strength and inconvenient expansion of the inner tube of the existing snake-shaped sleeve heat exchanger.

Inventors

LIU XIAOJIANG
YANG CHANGZHI
ZHANG GUOQIANG
LI HUAWEN
LIU YONGQI

Assignees

湖南创化低碳环保科技有限公司

Dates

Publication Date: 20260512
Application Date: 20260401

Claims (10)

1. The modularized washable snakelike double-pipe heat exchanger is characterized by comprising at least one group of heat exchange modules, wherein fluid conveying pipelines for connecting the heat exchange modules in parallel are arranged at two ends of each heat exchange module; the heat exchange module includes: A plurality of inner tubes arranged in parallel; The outer tubes are coaxially sleeved on the inner tube, two ends of the inner tube penetrate out of the outer tube, two ends of the outer tube are provided with sealing plates for the inner tube to pass through, and the inner wall of the outer tube, the outer wall of the inner tube and the sealing plates jointly enclose a sealed interlayer space; the adjacent outer tubes are communicated through a first connecting tube to form a first fluid channel which is in a serpentine turn-back shape; The turbulent flow inner core is arranged in the inner pipe in a drawing and inserting way; And a plurality of inner pipes are connected in series to form a detachable connecting structure of the serpentine folding second fluid channel, so that the turbulent flow inner core is convenient to install and detach.
2. A modular washable serpentine double-pipe heat exchanger as defined in claim 1, wherein: The fluid conveying pipeline comprises a first fluid inflow main pipe, a first fluid outflow main pipe, a second fluid inflow main pipe and a second fluid outflow main pipe; The first fluid inflow main pipe, the first fluid outflow main pipe, the second fluid inflow main pipe and the second fluid outflow main pipe are respectively provided with a plurality of preset interfaces for connecting with the heat exchange module; When the heat exchange modules are a group, the first fluid channel inlet, the first fluid channel outlet, the second fluid channel inlet and the second fluid channel outlet of the group of heat exchange modules are respectively connected with the preset interfaces on the corresponding main pipes; When the heat exchange modules are in multiple groups, the first fluid channel inlets, the first fluid channel outlets, the second fluid channel inlets and the second fluid channel outlets of the multiple groups of heat exchange modules are respectively connected with the preset interfaces on the corresponding main pipes, the multiple groups of heat exchange modules form a parallel connection relationship among the four main pipes, and the heat exchange capacity of the heat exchanger can be adjusted by increasing or decreasing the heat exchange modules connected with the preset interfaces.
3. A modular washable serpentine double-pipe heat exchanger as defined in claim 2, wherein: the first fluid inflow main pipe, the first fluid outflow main pipe, the second fluid inflow main pipe and the second fluid outflow main pipe are arranged perpendicular to the heat exchange module, and the four main pipes are parallel to each other; One end of the heat exchange module, a first type connection port near an outer pipe port is used as a first fluid channel inlet to be connected with a first fluid inflow main pipe, and an inner pipe port is used as a second fluid channel outlet to be connected with a second fluid outflow main pipe; the other end of the heat exchange module, a first type connection port near the port of the outer tube is used as a first fluid channel outlet to be connected with a first fluid outflow main pipe, and the port of the inner tube is used as a second fluid channel inlet to be connected with a second fluid inflow main pipe; The flow direction of the first fluid and the flow direction of the second fluid in the heat exchange module are opposite, and countercurrent heat exchange is formed.
4. The modular washable serpentine double-pipe heat exchanger of claim 1, wherein the connection structure comprises a plug disposed at an end of the inner pipe and a second connection pipe connected between adjacent inner pipes, the plug is used for closing a port of the inner pipe and allowing the turbulent inner core to be pulled out of the inner pipe after being opened, a second type connection port is formed near the end of the inner pipe, and the second connection pipe communicates the adjacent inner pipes through the second type connection port to form a serpentine-shaped reentrant second fluid channel.
5. The modular washable serpentine double-pipe heat exchanger of claim 1, wherein said connection structure comprises an elbow and a union, wherein the ports of adjacent inner pipes are serially connected through the elbow and the union to form a serpentine reentrant second fluid path, and wherein the union is opened to allow the turbulent flow core to be withdrawn from the inner pipe.
6. The method of claim 1, wherein the turbulent flow core is a twist-shaped strip structure.
7. The modular washable serpentine double-pipe heat exchanger of claim 1, wherein said inner pipe outer wall is provided with fins for increasing heat transfer area.
8. A modular washable serpentine double-pipe heat exchanger as claimed in claim 7, wherein the fins are spiral wound fins or longitudinal straight fins.
9. The washable modular serpentine double-pipe heat exchanger of claim 1, wherein said turbulent flow core has pull rings at both ends.
10. The washable modular serpentine double-pipe heat exchanger of claim 1, wherein said outer pipe has a first type of connection port near an end portion thereof, said first connection pipe connecting said plurality of outer pipes in series through said first type of connection port to form a serpentine turn-back first fluid path.

Description

Modularized washable snake-shaped sleeve heat exchanger Technical Field The invention relates to the technical field of heat exchange equipment, in particular to a modularized washable serpentine double-pipe heat exchanger. Background The serpentine double-pipe heat exchanger is common heat exchange equipment and is widely applied to the fields of chemical industry, refrigeration, heat pump, central air conditioner and the like. The basic structure is that two pipes with different diameters are coaxially sleeved to form an inner independent fluid channel and an outer independent fluid channel, and a plurality of sections of such sleeves are connected in series through elbows and coiled into a snake shape, so that a longer heat exchange flow is obtained in a limited space. The serpentine double-pipe heat exchanger has the advantages of simple structure, strong bearing capacity, easy realization of pure countercurrent heat exchange and the like, and is widely applied to high-pressure working conditions or scenes with higher requirements on heat exchange efficiency. However, the existing serpentine double-pipe heat exchangers have the following inherent drawbacks in practical applications: The cleaning is difficult because the inner tube of the serpentine double-pipe heat exchanger is of an elongated bent tube structure, and when impurities in fluid scale on the inner wall of the tube, the impurities cannot be mechanically dredged by using tools such as a brush like a straight tube due to the obstruction of the bent tube. The prior art generally only adopts a chemical cleaning method, but the chemical cleaning has limited effect on hard scale, can cause environmental pollution and is difficult to treat cleaning waste liquid. Many serpentine double-pipe heat exchangers are forced to be scrapped because the inner pipe fouling cannot be effectively cleaned, which severely limits their application in fouling-prone media. The heat exchange strength is limited, namely, under the working condition of laminar flow or low flow rate, a thicker boundary layer is formed at the position, close to the wall surface, of the fluid in the pipe, and the boundary layer is the main heat resistance of heat transfer. The traditional serpentine double-pipe heat exchanger only depends on the wall surface of a light pipe to transfer heat, and lacks measures for actively disturbing a boundary layer, so that the heat exchange coefficient is low, and the increasingly severe energy efficiency requirements are difficult to meet. The expansion is inconvenient, the traditional snakelike double-pipe heat exchanger is designed in an integrated mode, and the heat exchange capacity of the traditional snakelike double-pipe heat exchanger is fixed during manufacturing. When the system load increases, the capacity cannot be increased by increasing the heat exchange unit, and the whole equipment with larger specification often needs to be replaced, so that resource waste and investment increase are caused. If the heat exchange area is attempted to be increased by extending the length of a single serpentine tube, the fluid resistance is increased sharply, and the heat exchange efficiency is not improved significantly, so that the economical efficiency is poor. How to solve the problems of difficult cleaning, limited heat exchange strength and inconvenient expansion of the inner tube of the existing serpentine double-pipe heat exchanger becomes a technical problem to be solved urgently by the technicians in the field. Disclosure of Invention The invention aims to provide a modularized washable serpentine double-pipe heat exchanger. The technical pain point that the snakelike sleeve inner tube cannot be mechanically cleaned is solved by matching the turbulent flow inner core which is arranged in the inner tube in a drawing and inserting way with the detachable connecting structure; the heat exchange coefficient is improved through the synergistic effect of the fins on the outer wall of the inner tube and the turbulent flow inner core in the inner tube, and the parallel expansion of the heat exchange module is realized through the preset interface on the fluid conveying pipeline. The technical problems of difficult cleaning, limited heat exchange strength and inconvenient expansion of the inner tube of the existing snake-shaped sleeve heat exchanger are solved. The invention provides a modularized washable snake-shaped double-pipe heat exchanger, which comprises at least one group of heat exchange modules, wherein fluid conveying pipelines for connecting the heat exchange modules in parallel are arranged at two ends of each heat exchange module, each heat exchange module comprises a plurality of inner pipes which are arranged in parallel, a plurality of outer pipes which are coaxially sleeved on the inner pipes, two ends of each inner pipe penetrate out of the outer pipe, sealing plates for enabling the inner pipes to pass through are arranged at two end