Plate heat exchanger with adjustable heat exchange area

Abstract

The plate heat exchanger with the adjustable heat exchange area comprises a plate heat exchanger body, a heat source end inlet and a heat source end outlet are formed in the heat exchanger body, and a cold source end inlet and a cold source end outlet are formed in the other side of the heat exchanger body. A heat source channel A and a heat source channel B which are connected with the heat source end inlet and the heat source end outlet are arranged in the heat exchanger, a cold source channel A and a cold source channel B which are communicated with the cold source end inlet and the cold source end outlet are arranged in the heat exchanger, and the cold source end outlet is sequentially connected with a flow meter, a cooling source, a water pump and a proportional valve through pipelines and is communicated with the cold source end inlet; the heat exchanger is provided with an electric knife gate valve used for controlling the heat source channel A, the heat source channel B, the cold source channel A and the cold source channel B to be opened and closed. The heat exchanger is used for coping with heat exchange demand changes under different working conditions, flexible control over the performance of the heat exchanger can be achieved by adjusting the heat exchange area, heat exchange control in a larger range is matched, and optimization of the heat exchange effect and the energy efficiency is guaranteed.

Description

Technical Field

[0001] The utility model relates to a heat exchanger, in particular to a plate heat exchanger with adjustable heat exchange area. Background Technique

[0002] At present, plate heat exchangers play an important role in industrial production. It transfers heat from one fluid to another to achieve heat exchange and balance and precise temperature control. This heat exchange method is efficient and can achieve large-area heat exchange, and is widely used in industrial production.

[0003] Inside the plate heat exchanger, two fluids flow through different channels respectively. Usually, one is a cold source fluid (such as cold water, air, etc.), and the other is the fluid to be cooled (such as hot water, steam, etc.). Currently, the plate heat exchangers widely used in industrial production usually have a fixed heat exchange area. The inlet of the cold source end of the plate heat exchanger is a fluid with a fixed temperature, and its heat transfer amount is controlled by adjusting the flow rate of the cold source end fluid through a proportional valve. However, in the actual application process, when the opening of the proportional valve is the smallest (the flow rate of the cold source end is the smallest), the heat dissipation is still much greater than the heat production, and the temperature of the heat source end cannot be accurately controlled.

[0004] In the invention patent application with the name of "a catalytic furnace with a plate heat exchanger with adjustable structure" disclosed in CN113944938A, it includes a catalytic combustion furnace body and a catalytic bed body installed inside the catalytic combustion furnace body. The inside of the catalytic combustion furnace body is divided into a combustion chamber and a heat exchange chamber by a longitudinal separation plate. A plate heat exchange device is fixedly installed inside the heat exchange chamber. The plate heat exchange device includes a left fixed plate, a right fixed plate, a top installation guide rail, a bottom installation guide rail, a top movable guide rail, a front protection cover, a rear protection cover, and a heat exchange plate group fixedly installed inside the heat exchange plate group. It adjusts the heat exchange area by adjusting the distance between the heat exchange fins, but there is still a problem that the temperature of the heat source end cannot be accurately controlled.

[0005] The utility model patent with the name of "multi-stage area adjustable heat exchanger" is disclosed in 213481086U, which includes a heat exchanger main body part and a pressing part. The heat exchanger main body part includes a fixed pressing plate, a movable pressing plate, a support column, a limit guide rod and a heat exchange plate group. There are two limit guide rods, and the two limit guide rods are connected between the support column and the fixed pressing plate. The movable pressing plate is arranged between the fixed pressing plate and the support column, and the limit guide rod movably penetrates through the movable pressing plate. The hand wheel drives the lead screw to rotate. While the lead screw rotates, the lead screw drives the bracket and the pressing plate to move along the axial direction, so that the heat exchange plate group is separated from the extrusion of the movable pressing plate. The plates in the heat exchange plate group can be added or reduced according to needs, that is, the heat exchange area of the heat exchange plate group is adjusted. This patent realizes the regulation of the heat exchange area by adjusting the number of heat exchange fins, and there is also a problem that the temperature of the heat source end cannot be accurately controlled. Summary of the Utility Model

[0006] The purpose of the present utility model is to provide a plate heat exchanger with an adjustable heat exchange area that can accurately control the temperature of the heat source end.

[0007] The purpose of the present utility model is achieved through such a technical solution. A plate heat exchanger with an adjustable heat exchange area includes a plate heat exchanger. A heat source end inlet and a heat source end outlet are arranged on one side of the heat exchanger, and a cold source end inlet and a cold source end outlet are arranged on the other side of the heat exchanger. A heat source channel A and a heat source channel B connected to the heat source end inlet and the heat source end outlet are arranged in the heat exchanger. A cold source channel A and a cold source channel B communicated with the cold source end inlet and the cold source end outlet are arranged in the heat exchanger. The cold source end outlet is connected in sequence with a flow meter, a cooling source, a water pump and a proportional valve through a pipeline and is communicated with the cold source end inlet. Electric knife gate valves for controlling the opening and closing of the heat source channel A, the heat source channel B, the cold source channel A and the cold source channel B are arranged on the plate heat exchanger.

[0008] Further description, the heat exchanger is composed of a plurality of heat exchanger plates stacked, and the electric knife gate valves are arranged on a single heat exchanger plate.

[0009] Among them, at least two heat exchanger plates with electric knife gate valves are provided, and at least one heat exchanger plate is spaced between the two.

[0010] In the present utility model, there are four electric knife gate valves on the single heat exchanger plate, namely electric knife gate valve A, electric knife gate valve B, electric knife gate valve C and electric knife gate valve D. The electric knife gate valve A and the electric knife gate valve B are located at the top of the heat exchanger plate, and the electric knife gate valve C and the electric knife gate valve D are located at the bottom of the heat exchanger plate.

[0011] Specifically, the electric knife gate A and the electric knife gate C are respectively located on the cold source channel A and the cold source channel B, and the electric knife gate B and the electric knife gate D are respectively located on the heat source channel A and the heat source channel B.

[0012] Due to the adoption of the above technical solution, the utility model has the advantages of simple structure and reliable use. It is used to meet the changing heat exchange requirements under different working conditions. By adjusting the heat exchange area, the performance of the heat exchanger can be flexibly controlled to adapt to the changes in operating conditions, improve the energy efficiency and stability of the system, match a wider range of heat exchange control, and ensure the optimization of heat exchange effect and energy efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings of the utility model are described as follows:

[0014] Figure 1 is a schematic structural diagram of the utility model;

[0015] Figure 2 is a schematic structural diagram of the plate heat exchanger of the utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following further details the specific embodiments of the utility model in conjunction with the drawings. However, the utility model is not limited to these embodiments. Any improvement or substitution based on the basic spirit of this embodiment still falls within the scope protected by the claims of the utility model.

[0017] Embodiment 1, as Figure 1 and 2 shown, a plate heat exchanger with adjustable heat exchange area includes a plate heat exchanger 1. On the heat exchanger 1 and on one side of the heat exchanger 1, there are provided a heat source end inlet 2 and a heat source end outlet 3. On the other side of the heat exchanger 1, there are provided a cold source end inlet 4 and a cold source end outlet 5. Inside the heat exchanger 1, there are provided a heat source channel A 6 and a heat source channel B 7 connected to the heat source end inlet 2 and the heat source end outlet 3. Inside the heat exchanger 1, there are provided a cold source channel A 8 and a cold source channel B 9 communicating with the cold source end inlet 4 and the cold source end outlet 5. The cold source end outlet 5 is connected in sequence through a pipeline with a flow meter 10, a cooling source 11, a water pump 12, and a proportional valve 13 and communicates with the cold source end inlet 4. On the heat exchanger 1, there are provided electric knife gate valves for controlling the opening and closing of the heat source channel A 6, the heat source channel B 7, the cold source channel A 8, and the cold source channel B 9.

[0018] In the present utility model, a plate heat exchanger 1 is used for heat exchange with a heat source end; a flowmeter 10 is used for monitoring the coolant flow rate in a cold source circulation loop; a cooling source 11 is used for cooling the coolant heated through heat exchange to a target inlet temperature; a water pump 12 is used for circulating the coolant at the cold source end; and a proportional valve 13 is used for controlling the coolant flow rate passing through the heat dissipation plate heat exchanger. When the heat exchange area of the plate heat exchanger 1 is fixed, the heat dissipation amount can be controlled by controlling the coolant flow rate through the proportional valve 13, thereby achieving the purpose of controlling the temperature of the heat source end. However, when the opening degree of the proportional valve 13 is adjusted to the limit and the temperature of the heat source end is still uncontrollable, by adjusting the heat dissipation area of the plate heat exchanger 1 under the control of an electric knife gate valve, the temperature of the heat source end can be restored to the controllable range.

[0019] Among them, the heat exchanger 1 includes a stack formed by a plurality of heat exchanger plates 14, and the electric knife gate valve is arranged on a single heat exchanger plate 14.

[0020] In the present utility model, there are at least two heat exchanger plates 14 with electric knife gate valves, and there is at least one heat exchanger plate 14 spaced between the two.

[0021] Further described, there are four electric knife gate valves on the single heat exchanger plate 14, namely electric knife gate valve A15, electric knife gate valve B16, electric knife gate valve C17, and electric knife gate valve D18. The electric knife gate valve A15 and the electric knife gate valve B16 are located at the top of the heat exchanger plate, and the electric knife gate valve C17 and the electric knife gate valve D19 are located at the bottom of the heat exchanger plate.

[0022] Among them, the electric knife gate A15 and the electric knife gate C17 are respectively located on the cold source channel A8 and the cold source channel B9, and the electric knife gate B16 and the electric knife gate D18 are respectively located on the heat source channel A6 and the heat source channel B7.

[0023] When the opening degree of the proportional valve 13 is closed to the minimum and the heat dissipation amount is still too large to maintain the temperature stability of the heat source end, the heat dissipation area of the heat dissipation plate heat exchanger can be changed by closing the electric knife gate valve A15, the electric knife gate valve B16, the electric knife gate valve C17, and the electric knife gate valve D18. The fluids at the cold source end and the heat source end only pass through the front heat exchanger plates of the heat exchanger plates where the electric knife gate valve A15, the electric knife gate valve B16, the electric knife gate valve C17, and the electric knife gate valve D18 are located, and the heat exchange area is reduced.

[0024] Similarly, for a heat exchange system designed with the heat exchange area of the heat exchanger in the closed state of the electric knife gate valve, the heat exchange area of the heat exchanger can be increased by opening the electric knife gate valve, thereby increasing the heat dissipation amount.

Claims

1. A plate heat exchanger with adjustable heat exchange area, comprising a plate heat exchanger (1). On one side of the heat exchanger (1), a heat source end inlet (2) and a heat source end outlet (3) are provided. On the other side of the heat exchanger (1), a cold source end inlet (4) and a cold source end outlet (5) are provided. Inside the heat exchanger (1), a heat source channel A (6) and a heat source channel B (7) connected to the heat source end inlet (2) and the heat source end outlet (3) are provided. Inside the heat exchanger (1), a cold source channel A (8) and a cold source channel B (9) communicating with the cold source end inlet (4) and the cold source end outlet (5) are provided. It is characterized in that: The outlet (5) of the cold source end is sequentially connected with a flow meter (10), a cooling source (11), a water pump (12) and a proportional valve (13) through a pipeline and is communicated with the inlet (4) of the cold source end; on the heat exchanger (1), there are electric knife gate valves for controlling the opening and closing of the heat source channel A (6), the heat source channel B (7), the cold source channel A (8) and the cold source channel B (9).

2. The plate heat exchanger with adjustable heat exchange area according to claim 1, characterized in that: The heat exchanger (1) is composed of a plurality of heat exchanger plates (14) stacked, and the electric knife gate valve is arranged on a single heat exchanger plate (14).

3. The plate heat exchanger with adjustable heat exchange area according to claim 2, characterized in that: There are at least two heat exchanger plates (14) with electric knife gate valves, and there is at least one heat exchanger plate (14) spaced between the two.

4. The plate heat exchanger with adjustable heat exchange area according to claim 3, characterized in that: There are four electric knife gate valves on the single heat exchanger plate (14), namely an electric knife gate valve A (15), an electric knife gate valve B (16), an electric knife gate valve C (17) and an electric knife gate valve D (18). The electric knife gate valve A (15) and the electric knife gate valve B (16) are located at the top of the heat exchanger plate, and the electric knife gate valve C (17) and the electric knife gate valve D (19) are located at the bottom of the heat exchanger plate.

5. The plate heat exchanger with adjustable heat transfer area according to claim 4, characterized in that: The electric knife gate A (15) and the electric knife gate C (17) are respectively located on the cold source channel A (8) and the cold source channel B (9), and the electric knife gate B (16) and the electric knife gate D (18) are respectively located on the heat source channel A (6) and the heat source channel B (7).

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