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Coiler tube heat exchanger

Coil heat exchangers are known, which transfer heat between a heat transfer medium enclosed in a container and a liquid product flowing through a tubular coil extending in the heat transfer medium container. Such coil heat exchangers have been shown to be particularly effective for certain types of liquid products with relatively high viscosity.

Commodity name： Coiler tube heat exchanger

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Smart Manufacturing

Key words:

coiler tube heat exchanger

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产品描述

1. Overview

In a floating coil heat exchanger, when steam is heating hot water, the up and down floating of the coil causes the water flow around the coil to destroy the laminar heat transfer. The heat transfer capacity is improved, and the heat transfer coefficient K ≥ 3000W/㎡℃. At the same time, due to the flushing effect of the water flow, the tube can be cantilevered and float freely, and can expand and contract freely, so it is not easy to scale. If a small amount of scale accumulates during long-term use, it will be automatically descaled through the expansion of the tube, so the heat transfer capacity will not decrease in long-term use, and the effect is good.

2. Parameters

No.	Parameters	Name	Unit	Influencing factors
1	A	Heat exchange area	m²	Number of coils, diameter and length of coils, arrangement of pipes
2	U	Heat transfer coefficient	W/(m²·K)	Flow rate, physical properties (such as viscosity, density, specific heat, etc.) of the fluid, material of the pipe, flow mode inside and outside the pipe, etc.
3	Q	Fluid flow	m³/h	Fluid flow rate, density, temperature changes, turbulence intensity in the pipe, etc.
4	T-IN/OUT	Inlet and outlet temperatures	°C	Fluid heat load requirements, heat exchange efficiency of heat exchanger, environmental conditions, etc.
5	Q	Heat load	KW/MW	Flow rate, temperature difference, specific heat of the medium, etc.
6	ΔP	Pressure loss	Pa	Pipe length, diameter, flow rate, fluid properties, pipe material, etc.
7	D	Coil diameter	mm	Fluid flow rate requirements, heat exchange area requirements, etc.
8	S	Coil spacing	mm	Heat exchange area, fluid flow rate, maintenance space, etc.
9	P	Working pressure	MPa	Fluid properties, structural strength of the heat exchanger, installation environment, etc.

3. Functions

3.1. The heat transfer-enhanced spiral copper coil adopts a cantilever fixed structure. When the heat medium (saturated steam or high-temperature water) flows through the tube, the coil produces high-speed reciprocating motion, forcing the water around the heat exchange tube to form disturbances, thereby greatly increasing the heat transfer film coefficient a0, reducing the thermal resistance of the fluid on the outer wall of the tube 1/a0, and improving the total heat transfer coefficient K.

3.2. During the operation of the automatic descaling equipment, due to the high-speed floating of the coil, it is difficult for scale to deposit on the outer wall of the tube; at the same time, due to the expansion and contraction phenomenon of the coil with temperature changes, even if a small amount of scale is formed on the outer wall of the tube, it will automatically fall off (it can be discharged from the tank regularly through the sewage outlet), eliminating the traditional cumbersome descaling process, so the heat exchanger can maintain the best state for a long time.

3.3. Accurate temperature control This equipment is equipped with a precise "intelligent temperature regulator" that can continuously and automatically detect the outlet water temperature and instruct the control valve to adjust the amount of steam (or high-temperature water) entering the coil. Therefore, even if the load fluctuates, the outlet water temperature can still be maintained within the range of ±2°C of the set value.

3.4. Reduced floor space The equipment has a compact structure and occupies an area of about 10% of the same functional shell and tube heat exchanger. It not only reduces the cost and effectively utilizes space, but also facilitates transportation and hoisting.

4. Schematic diagram

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