Multipurpose square special-shaped tube heat exchanger

Abstract

The utility model discloses a multipurpose square special-shaped tube heat exchanger, which belongs to the technical field of heat exchange equipment and comprises an upright square shell, a plurality of heat exchange-spraying units and a control system, the lower end of the shell is a liquid outlet, the upper end of the shell is a material outlet, and a material inlet is formed in a reducing part of the upper part of the liquid outlet; the heat exchange-spraying unit comprises a spraying device composed of a plurality of spraying pipes and a heat exchange pipe set arranged on the lower portion of the spraying device. The heat exchange tube group consists of a plurality of layers of special-shaped heat exchange tubes which are arranged up and down; a main liquid inlet pipe is arranged at the lower end of the heat exchange pipe set, and a main liquid outlet pipe is arranged at the upper end. The liquid-liquid heat exchanger can be suitable for liquid-liquid heat exchange, particle capture and gas phase condensation, and heat exchange, dust removal and condensation are achieved through the cooperation of different media flowing through the shell and the work of the heat exchange pipe set and the spraying device.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange equipment technical field especially a multipurpose square special-shaped tube heat exchanger. BACKGROUND

[0002] The heat exchanger is a kind of energy-saving equipment for realizing heat transfer between materials between two or more than two fluids at different temperatures, is to pass heat from fluid with higher temperature to fluid with lower temperature, so that fluid temperature reaches the index of flow process regulation, to meet the needs of process conditions, simultaneously, it is one of main equipment for improving energy utilization rate.Common heat exchanger types include jacketed heat exchanger, immersion type coil heat exchanger, spray type heat exchanger, jacketed tube heat exchanger, plate type heat exchanger, shell-and-tube heat exchanger and spiral plate heat exchanger, but different advantages and disadvantages problems exist in each heat exchanger.

[0003] (1) the jacketed heat exchanger is made by installing jacket on the outer wall of container, to improve heat transfer coefficient and make liquid in kettle heated evenly, stirring device can be installed in kettle, when cooling water or non-phase-change heating agent is passed in jacket, spiral baffle or other measures for increasing turbulence can be arranged in jacket to improve heating coefficient on one side of jacket, to make up the deficiency of heat transfer surface, coil can also be installed in the kettle, and the jacketed heat exchanger is widely used for heating and cooling in reaction process.

[0004] The advantage is simple structure, and the disadvantage is that the heating surface is limited by container wall surface, and the heat transfer coefficient is not high.

[0005] (2) the immersion type coil heat exchanger is made by bending metal pipe into various shapes suitable for container, and immersed in liquid in container, to improve heat transfer coefficient, stirring device can be installed in container.

[0006] The advantage is simple structure, can bear high pressure, and can be made of corrosion-resistant material, and the disadvantage is that the turbulence degree of liquid in container is low, and the heating coefficient outside pipe is small.

[0007] (3) the spray type heat exchanger is made by fixing heat exchange pipes in row on steel frame, hot fluid flows in pipe, and cooling water is uniformly sprayed from upper spraying device, so it is also called spray type cooler, and the outside of pipe of spray type heat exchanger is a liquid film with high turbulence degree.

[0008] The advantage is that the heating coefficient outside pipe is greatly increased compared with the immersion type, and the heat exchanger is mostly placed in air circulation place, and evaporation of cooling water also carries away part of heat, which can reduce cooling water temperature and increase heat transfer driving force, and the disadvantage is that the heat transfer effect is still not high, not easy to overhaul, spraying is not uniform, and the cost is high.

[0009] (4) The double-pipe heat exchanger is made of straight pipes with different diameters and connected by U-shaped bends. In the heat exchanger, one fluid flows in the pipe and the other fluid flows in the annular gap. Both fluids can have high flow rates, so the heat transfer coefficient is large. In addition, in the double-pipe heat exchanger, the two fluids can be in pure counter flow, and the logarithmic mean driving force is large.

[0010] The advantages are simple structure, high pressure resistance, convenient application (the number of pipe segments can be increased or decreased according to needs), and the heat exchanger has large heat transfer coefficient, large heat transfer driving force, and can withstand high pressure. The disadvantages are that maintenance, cleaning and disassembly are more troublesome, and leakage is easy to occur at the detachable connection.

[0011] (5) The plate heat exchanger is the most typical type of heat exchanger with a main structure composed of heat exchange plates and rubber strips between the plates. It has long dominated the market and is mainly used for heat exchange between liquids. It is commonly known as water-water heat exchanger in the industry.

[0012] The advantages are long history and dominance in all heat exchangers. The disadvantages are large size, low heat exchange efficiency, expensive replacement of rubber strips (the cost of replacing rubber strips accounts for about 1 / 3-1 / 2 of the entire process), relatively low pressure resistance, and high requirement for medium cleanliness.

[0013] (6) The shell-and-tube heat exchanger, also known as the tube heat exchanger, is mainly composed of a shell, a tube bundle, a tube plate and a head. The shell is usually circular and contains parallel tube bundles or spiral tubes. The tube bundle is fixed to the tube plate at both ends. In the shell-and-tube heat exchanger, two fluids exchange heat, one flows in the tube and its path is called the tube pass, and the other flows outside the tube and its path is called the shell pass. The wall of the tube bundle is the heat transfer surface.

[0014] The advantages are high heat transfer efficiency, suitable for high pressure and high temperature working conditions, and easy maintenance. The disadvantages are high cost, large size, difficult cleaning, and large flow resistance and pressure loss.

[0015] (7) The spiral plate heat exchanger is a compact and efficient heat exchanger. It is made by rolling two parallel metal plates into a spiral shape, forming multiple spiral channels between them.

[0016] The advantages are large heat transfer area and small flow resistance, suitable for handling media with high viscosity and solid particles. The disadvantages are complex structure, high manufacturing cost, and difficult cleaning and maintenance.

[0017] Therefore, it is necessary to develop a new type of multi-purpose square special-shaped tube heat exchanger to overcome the above problems. Invention content

[0018] The utility model provides a multipurpose square special-shaped tube heat exchanger, effectively improve production efficiency, reduce production cost.

[0019] To solve the above technical problems, the utility model adopts the technical scheme of:

[0020] A multipurpose square special-shaped tube heat exchanger, including the shell of vertical square, a plurality of heat exchange - spray unit and control system of setting in the shell, the lower end of shell is the liquid discharge port, and the upper end is the discharge port, and the variable diameter on the upper part of liquid discharge port is provided with the feed inlet, the heat exchange - spray unit includes the spray device of being composed of a plurality of spray pipes and the heat exchange pipe group of setting in the lower part of spray device, the heat exchange pipe group is composed of a plurality of layers of special-shaped heat exchange pipes arranged up and down, the lower end of heat exchange pipe group is provided with total liquid inlet pipe, and the upper end is provided with total liquid outlet pipe.

[0021] The utility model discloses the further improvement in the technical scheme lies in: the first reinforcing rib is provided at the variable diameter of the lower part of the discharge port of the shell, the second reinforcing rib is provided at the upper part of the shell, the third reinforcing rib is provided at the lower part of the shell, and the fourth reinforcing rib is provided at the variable diameter of the upper part of the liquid discharge port of the shell.

[0022] The utility model discloses the further improvement in the technical scheme lies in: the bracket is arranged on the left and right side inner wall of the shell, and a plurality of layers of netted support structures are arranged on the bracket.

[0023] The utility model discloses the further improvement in the technical scheme lies in: the special-shaped heat exchange pipe is fixed on the netted support structure using U type bolt, and the netted support structure is bolted with the shell inner wall bracket.

[0024] The utility model discloses the further improvement in the technical scheme lies in: the netted support structure is made of anticorrosive material.

[0025] The utility model discloses the further improvement in the technical scheme lies in: the netted support structure is made of angle steel welding.

[0026] The utility model discloses the further improvement in the technical scheme lies in: the cross section of special-shaped heat exchange pipe is oval, and each layer of special-shaped heat exchange pipe is serpentine arrangement.

[0027] The utility model discloses the further improvement in the technical scheme lies in: the import of each layer of special-shaped heat exchange pipe is gathered into total liquid inlet pipe by liquid inlet connecting piece, and total liquid inlet pipe is arranged in the lowermost layer of heat exchange pipe group or parallel with the bottom layer special-shaped heat exchange pipe, and the export of each layer of special-shaped heat exchange pipe is gathered into total liquid outlet pipe by liquid outlet connecting piece, and total liquid outlet pipe is arranged in the uppermost layer of heat exchange pipe group or parallel with the uppermost layer special-shaped heat exchange pipe.

[0028] The further improvement in the technical scheme of the utility model lies in that: the plurality of spray pipes are arranged in parallel, a plurality of nozzles are arranged on each spray pipe, both ends of the spray pipe are arranged to pass through the shell, one end is connected with the water inlet pipe, and the other end is blocked.

[0029] The further improvement in the technical scheme of the utility model lies in that: temperature detection devices, pressure detection devices and adjusting valves are arranged on the total liquid inlet pipe, the total liquid outlet pipe, the feed inlet and the discharge outlet; the control system adopts linkage control of the temperature detection devices, the pressure detection devices and the adjusting valves, and the operating state of the heat exchanger is monitored and adjusted in real time.

[0030] Thanks to the above technical scheme, the utility model has the following technical progress:

[0031] 1. The utility model sets heat exchange pipe groups and spraying devices in the square shell arranged vertically, and through the different medium flowing in the shell, the heat exchange pipe groups and the spraying devices are combined to work, which can be applicable to liquid-liquid heat exchange, particle capture and gas phase condensation, and can realize heat exchange, dust removal and condensation and other working requirements.

[0032] 2. The square shell in the utility model is designed to be more easily arranged and combined in space, especially in the occasion with limited space, the space can be more efficiently utilized, and compared with the traditional circular tube heat exchanger, the multipurpose square special-shaped tube heat exchanger occupies smaller space under the same heat transfer area.

[0033] 3. The design of the elliptical special-shaped tube in the utility model increases the contact area of the inner and outer surfaces of the tube, is tangent to the shell pass heat exchange fluid, has two maximum heat exchange regions, and thus improves the heat transfer efficiency.

[0034] 4. The utility model is provided with spraying devices in the interior of the shell, so that the interior of the shell is easy to clean and maintain, and the operation cost is reduced.

[0035] 5. The utility model is provided with temperature detection devices, pressure detection devices or other monitoring devices at the inlet and outlet of the fluid medium, and linkage control is realized with the external adjusting valve, so that the operating state of the heat exchanger can be monitored and adjusted in real time, and intelligent control is realized.

[0036] 6. The multipurpose square special-shaped tube heat exchanger provided by the utility model can adapt to the requirements of different media and working conditions, such as high temperature, high pressure, corrosive medium, liquid-liquid heat exchange, particle capture and gas phase condensation, has strong applicability, has a positive promoting effect on the development of heat exchange and environmental protection technology, has broad market prospect and economic benefit. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0038] Figure 1 is a structural schematic diagram of a multipurpose square special-shaped tube heat exchanger provided in the embodiments of the present application;

[0039] Figure 2 is a structural schematic diagram of a single-layer heat exchange tube arrangement mode;

[0040] Among them, 1, shell; 1-1, first reinforcing rib; 1-2, second reinforcing rib; 1-3, third reinforcing rib; 1-4, fourth reinforcing rib; 1-5, liquid discharge port; 1-6, discharge port; 2, special-shaped heat exchange tube; 3, spray pipe; 3-1, nozzle; 4, total liquid inlet pipe; 5, total liquid outlet pipe; 6, liquid inlet connecting piece; 7, liquid outlet connecting piece; 8, net-like support structure. DETAILED DESCRIPTION

[0041] It should be noted that the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above drawings are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0042] In the description of the present application, it should be understood that the orientations or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0043] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0044] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments:

[0045] like Figure 1 As shown, a multi-purpose square-shaped tube heat exchanger includes an upright square shell 1, several heat exchange-spray units and a control system disposed within the shell 1; the lower end of the shell 1 is a drain port 1-5, the upper end is a discharge port 1-6, and a feed port is provided on the diameter change above the drain port 1-5. Figure 1 (Not shown in the drawing); the heat exchange-spray unit includes a spray device consisting of several spray pipes 3 and a heat exchange tube group located at the bottom of the spray device; the heat exchange tube group consists of several layers of irregularly shaped heat exchange tubes 2 arranged vertically; the lower end of the heat exchange tube group is provided with a main liquid inlet pipe 4, and the upper end is provided with a main liquid outlet pipe 5. Since the shell is placed vertically for use, multiple heat exchange-spray units can be stacked inside the multi-purpose square irregularly shaped tube heat exchanger to enhance the heat exchange-spray effect of the entire heat exchanger.

[0046] Furthermore, such as Figure 1 As shown, a first reinforcing rib 1-1 is provided at the diameter change point below the discharge port 1-6 of the housing 1; a second reinforcing rib 1-2 is provided at the upper part of the housing 1; a third reinforcing rib 1-3 is provided at the lower part of the housing 1; and a fourth reinforcing rib 1-4 is provided at the diameter change point above the drain port 1-5 of the housing 1. The external reinforcing ribs ensure the strength of the housing 1 to adapt to different applications.

[0047] Furthermore, such as Figure 1 As shown, supports are provided on the inner walls of the left and right sides of the shell 1, and several layers of mesh support structures 8 are provided on the supports; each layer of irregularly shaped heat exchange tubes 2 is installed on each mesh support structure 8. The mesh support structures 8 ensure the stability and reliability of the heat exchanger.

[0048] Furthermore, such as Figure 1 As shown, the irregularly shaped heat exchange tube 2 is fixed to the mesh support structure 8 with U-bolts to prevent deformation or vibration of the irregularly shaped heat exchange tube 2 during fluid flow; the mesh support structure 8 is bolted to the bracket on the inner wall of the shell 1. This facilitates the disassembly, assembly, and maintenance of the heat exchange tube assembly.

[0049] Furthermore, the mesh support structure 8 is made of corrosion-resistant materials. It is generally made of stainless steel or other corrosion-resistant materials.

[0050] Further, the net support structure 8 is made by welding angle steel.

[0051] Further, as shown in Figures 1-2 the cross section of the special-shaped heat exchange pipe 2 is oval; the special-shaped heat exchange pipe 2 is tangent to the shell side heat exchange fluid, so that the special-shaped heat exchange pipe 2 has two maximum heat exchange areas, and the side length and shape of the special-shaped heat exchange pipe 2 can be adjusted according to actual needs.

[0052] Each layer of special-shaped heat exchange pipe 2 is arranged in a serpentine shape, which enhances the contact area of the fluid with the pipe wall surface and improves the heat exchange efficiency.

[0053] Further, as shown in Figure 1 the inlet of each layer of special-shaped heat exchange pipe 2 is collected into a total liquid inlet pipe 4 by a liquid inlet connecting piece 6, and the total liquid inlet pipe 4 is arranged at the lowermost layer of the heat exchange pipe group or parallel to the bottom layer of the special-shaped heat exchange pipe 2; the outlet of each layer of special-shaped heat exchange pipe 2 is collected into a total liquid outlet pipe 5 by a liquid outlet connecting piece 7, and the total liquid outlet pipe 5 is arranged at the uppermost layer of the heat exchange pipe group or parallel to the uppermost layer of the special-shaped heat exchange pipe 2. One inlet and outlet are shared by a plurality of layers of special-shaped heat exchange pipes 2, forming a group of special-shaped heat exchange pipe groups, reducing the number of external connecting pipelines and the construction cost.

[0054] Further, as shown in Figure 1 several spray pipes 3 are arranged in parallel, and each spray pipe 3 is provided with a plurality of nozzles 3-1, and the two ends of the spray pipe 3 are arranged outside the shell 1, one end is connected with the water inlet pipe, and the other end is blocked. According to the actual situation on site, which end is convenient to connect with the water inlet pipe, the water inlet pipe is connected from which end. A set of spray devices is arranged above each group of heat exchange pipe groups, and the number of nozzles 3-1 in the spray pipe 3 is arranged according to the area of the heat exchange pipe group, and the spray area is reasonably arranged and distributed above the heat exchange pipe group. When the shell side fluid is a mixture of materials and steam, the heat exchange capacity is further improved.

[0055] Further, as shown in Figure 1 the temperature detection device, pressure detection device or other monitoring device, regulating valve and the like are arranged on the total liquid inlet pipe 4, total liquid outlet pipe 5, feed inlet and discharge outlet 1-6; the control system adopts linkage control of each temperature detection device, each pressure detection device and each regulating valve, and the running state of the heat exchanger is monitored and adjusted in real time to ensure safe and stable operation of the heat exchanger.

[0056] Example 1

[0057] Multi-purpose square-shaped special-shaped tube heat exchanger is used for capturing particles: when the flue dust is the shell fluid, the flue dust is blown obliquely downward from the inlet, at this time, the total liquid inlet 4 and the total liquid outlet 5 of the heat exchange tube group are closed. The water inlet pipe of the spraying device is connected to the industrial water or other workshop circulating water without particle impurities, and the spraying is carried out to reduce the dust. The captured flue dust flows out from the lower part of the liquid outlet 1-5 of the shell 1 together with the industrial water (circulating water), and is collected and then precipitated or filtered to collect the flue dust particles. The filtered water is treated and qualified, and then pumped to the spraying device for use. A smoke concentration sensor is arranged at the discharge port 1-6 above the shell 1 to detect the outlet flue dust concentration. If the concentration exceeds the warning, the water delivery pump on the water inlet pipe connected with the spraying device is controlled to increase the delivery flow, and the spraying amount of the spraying device is increased to reduce the flue dust emission concentration.

[0058] Example 2

[0059] Multi-purpose square-shaped special-shaped tube heat exchanger is used for gas phase condensation: when the mixed steam containing water, solvent or residual active ingredients generated after the wet meal participating in the completion of the reaction is dried is the shell fluid, the mixed steam enters the shell 1 through the inlet, and the heat exchange tube group and the spraying device are connected to the industrial water or other workshop circulating water without particle impurities at the same time. The mixed steam is first contacted with the heat exchange tube group to exchange heat, and the mixed steam is liquefied and condensed. The spraying device starts to spray at the same time. The first is the uniform spraying in the space, which can well liquefy and condense the mixed steam, and the second is that the surface temperature of the elliptical heat exchange tube in the heat exchange tube group is increased after the heat exchange between the mixed steam and the heat exchange tube group, so that the heat exchange efficiency is reduced. The atomized water droplets sprayed by the spraying device can well take away the temperature of the surface of the elliptical heat exchange tube which is increased due to heat exchange, and the condensed mixed liquid is discharged from the lower part of the shell. The combination of the spraying device and the heat exchange tube group greatly improves the effect of gas phase condensation.

[0060] Example 3

[0061] The multipurpose square-shaped special-shaped tube heat exchanger is used for liquid-liquid heat exchange; the mixed oil extracted after workshop production flows in the heat exchange tube group, and the shell side fluid is high-temperature steam. The temperature of the mixed oil is reduced after long-distance transportation and cannot meet the processing temperature of the subsequent process; at this time, the water inlet of the spray device is closed, the used high-temperature steam is blown into the shell 1 through the feed inlet, the waste heat of the secondary utilization high-temperature steam is used to preliminarily heat the mixed oil after temperature reduction, and the condensed steam after heat exchange is discharged from the liquid discharge port 1-5 below the shell 1. In this working mode, the temperature of the mixed oil is increased, and the energy consumption of subsequent heating is reduced, so that the energy is efficiently utilized. Temperature sensors are arranged at the total liquid inlet 4 and the total liquid outlet 5 of the heat exchange tube group, and temperature and pressure sensors are arranged at the feed inlet and the discharge port 1-6 (high-temperature steam inlet and outlet). The inlet and outlet temperatures of the mixed oil, the inlet and outlet temperatures and pressures of the high-temperature steam are detected, and the secondary utilization steam is maximized through the dynamic control of the adjusting valves connected with the mixed oil and the high-temperature steam.

[0062] In conclusion, the multipurpose square-shaped special-shaped tube heat exchanger has obvious advantages in heat transfer efficiency, compactness and adaptability, and needs to be selected and optimized according to specific requirements and conditions in actual application, and can be applied in the fields of industrial production, energy utilization and environmental protection.

[0063] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the utility model, and not to limit them; although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A multipurpose square-shaped profiled tube heat exchanger, characterized in that: The application relates to a heat exchange-spraying device, which comprises a vertical square shell (1), a plurality of heat exchange-spraying units arranged in the shell (1) and a control system; the lower end of the shell (1) is a liquid discharge port (1-5), the upper end is a discharge port (1-6), a feeding port is arranged on the variable-diameter upper portion of the liquid discharge port (1-5); the heat exchange-spraying unit comprises a spraying device composed of a plurality of spraying pipes (3) and a heat exchange pipe group arranged at the lower portion of the spraying device; the heat exchange pipe group is composed of a plurality of layers of special-shaped heat exchange pipes (2) arranged in a vertical mode; the lower end of the heat exchange pipe group is provided with a total liquid inlet pipe (4), and the upper end is provided with a total liquid outlet pipe (5).

2. A multipurpose square-shaped profiled tube heat exchanger according to claim 1, characterized in that: A first reinforcing rib (1-1) is arranged at the variable-diameter lower portion of the discharge port (1-6) of the shell (1); a second reinforcing rib (1-2) is arranged at the upper portion of the shell (1); a third reinforcing rib (1-3) is arranged at the lower portion of the shell (1); and a fourth reinforcing rib (1-4) is arranged at the variable-diameter upper portion of the liquid discharge port (1-5) of the shell (1).

3. A multipurpose square-shaped profiled tube heat exchanger according to claim 1, characterized in that: Supports are arranged on the left and right inner walls of the shell (1), and a plurality of layers of net-shaped support structures (8) are arranged on the supports; the special-shaped heat exchange pipes (2) are arranged on the net-shaped support structures (8).

4. A multi-purpose square-shaped profiled tube heat exchanger according to claim 3, characterized in that: The special-shaped heat exchange pipes (2) are fixed on the net-shaped support structures (8) by U-shaped bolts; and the net-shaped support structures (8) are bolt-connected with the inner wall supports of the shell (1).

5. A multi-purpose square-shaped profiled tube heat exchanger according to claim 3, characterized in that: The net-shaped support structures (8) are made of anticorrosive materials.

6. A multi-purpose square-shaped profiled tube heat exchanger according to claim 3, characterized in that: The net-shaped support structures (8) are made by welding angle steels.

7. A multipurpose square-shaped profiled tube heat exchanger according to claim 1, characterized in that: The cross section of the special-shaped heat exchange pipes (2) is in an elliptical shape; and the special-shaped heat exchange pipes (2) are arranged in a serpentine mode.

8. A multi-purpose square-shaped profiled tube heat exchanger according to claim 7, characterized in that: The inlets of the special-shaped heat exchange pipes (2) are gathered into the total liquid inlet pipe (4) by liquid inlet connecting pieces (6), and the total liquid inlet pipe (4) is arranged at the lowermost layer of the heat exchange pipe group or is parallel to the bottom layer of the special-shaped heat exchange pipes (2); and the outlets of the special-shaped heat exchange pipes (2) are gathered into the total liquid outlet pipe (5) by liquid outlet connecting pieces (7), and the total liquid outlet pipe (5) is arranged at the uppermost layer of the heat exchange pipe group or is parallel to the top layer of the special-shaped heat exchange pipes (2).

9. The multi-purpose square-shaped profiled tube heat exchanger according to claim 1, characterized in that: The spraying pipes (3) are arranged in parallel, each of the spraying pipes (3) is provided with a plurality of nozzles (3-1), and the two ends of the spraying pipe (3) are arranged to penetrate out of the shell (1) and are connected with water inlet pipes and blocked at the other ends.

10. The multi-purpose square-shaped profiled tube heat exchanger according to claim 1, characterized in that: Temperature detecting devices, pressure detecting devices and adjusting valves are arranged on the total liquid inlet pipe (4), the total liquid outlet pipe (5), the feeding port and the discharge port (1-6); and the control system adopts linkage control of the temperature detecting devices, the pressure detecting devices and the adjusting valves to monitor and adjust the operation state of the heat exchanger in real time.

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