High efficiency plate pipe reverse running type square box heat exchanger

Abstract

The invention relates to a kind of high-effect tube-in-sheet back square-chest heat exchanger. Current sheet heat exchanger depends on the mutual extrusion among sheets to be sealed. And it uses the reverse groove pressed by sheets as the flow passage. The space of the flow passage is narrow and it is often jammed by the tiny filth. So the equipment often needs to clear. It influences the heat exchanging effect and the normal using of the equipment and brings inconvenience for users. The single pass and the single flow passage make thermal efficiency low, energy sources loss high and operating charge expensive. The invention adopts the tube-in-sheet back square-chest heat exchanger. It forms multi-pass, multi-passage and multi-baffle path by the baffle board, the tube-in-sheet baffle board and the guide board in the chest. It not only has the tight structure and the small capacity, but also has high heat exchange coefficient, small heat exchange area and low cost.

Description

1. Technical Field: [0001] The invention relates to a heat exchanger, in particular to a high-efficiency plate-tube back-stroke square box heat exchanger. 2. Technical background: [0002] In the prior art, the existing plate heat exchanger has been found through long-term research and the actual use of users, that the existing plate heat exchanger mainly has the following shortcomings: [0003] 1. The flow channel gap is small and easy to be blocked, the flow rate becomes small, the flow is unstable, and the capacity is expanded and the pressure is expanded without being compressed. [0004] Since the plate heat exchanger relies on the mutual extruding and sealing of the plate and the plate, the inverted groove punched by the plate is used as the flow channel, the flow channel gap is small, and the flow channel is often blocked by fine dirt, so the equipment needs to be cleaned frequently , Affecting the heat exchange effect and normal use of the equipment, causing a lot of inco...

AI Technical Summary

Problems solved by technology

[0003] 1. The gap of the flow channel is small and easy to block, the flow velocity becomes smaller, the flow is unstable, the expansion and pressure expansion, no pressure

[0004] Since the plate heat exchanger relies on the mutual extrusion and sealing of the plates, and uses the inverted groove stamped by the plates as the flow channel, the flow channel gap is small, and the flow channel is often blocked by fine dirt, so the equipment needs to be cleaned frequently , affecting the heat exchange effect and normal use of the equipment, causing a lot of inconvenience to users

[0005] 2. Single stroke, single channel, low thermal efficiency of equipment, waste of energy, high operating costs

[0007] 3. The plates are easy to corrode and perforate

Plates and sealing strips must be replaced, and re-investment will be made, which will increase the user's investment cost again and affect the normal use of the equipment

[0008] 4. High equipment maintenance costs

Since the seal between the plates of the plate heat exchanger relies on the extrusion and sealing of the rubber strips, the rubber strips are extruded and deformed, and coupled with heat, each sheet must be opened during equipment maintenance. Once the plates are opened, most of them cannot be used. replace

The price of rubber strips is very high, which brings users a lot of costs for purchasing rubber strips and labor

[0009] 5. Materials: The plates of the existing plate heat exchangers are all made of stainless steel. Because the water in most provinces in my country contains CL ions, and the contact between CL ions and stainless steel will produce chemical reactions, which will cause corrosion to the plates. Generally, the plates of plate heat exchangers After 2 years of use, some plates have become thinner or perforated due to CL ion corrosion. The plates must be replaced and re-invested, which increases the user's investment cost again and affects the normal use of the equipment.

[0010] 6. The service life is short. The plate heat exchanger is limited by its structure and materials, and the service life is generally 2-3 years

[0011] 7. The structure is simple, no shell packaging, and the appearance is not beautiful, practical

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