Spiral plate heat exchanger is a new type of heat exchanger with good heat transfer efficiency and high operational stability, which can work together with multiple units.

spiral plate heat exchanger

Spiral plate heat exchanger is a heat exchanger whose heat transfer element is composed of spiral plate.

Spiral plate heat exchanger is a kind of high-efficiency heat exchanger equipment, which is suitable for steam-vapor, steam-liquid, liquid-liquid and liquid-to-liquid heat transfer. It is suitable for chemical, petroleum, solvent, pharmaceutical, food, light industry, textile, metallurgy, steel rolling, coking and other industries. According to the structure can be divided into non-detachable (Ⅰ type) spiral plate and detachable (Ⅱ type, Ⅲ type) spiral plate heat exchanger

The current standard is JB/T4751-2003 "Spiral plate heat exchanger".

Structural performance

1、This equipment is made of two rolled sheets, forming two uniform spiral channels, the two heat transfer media can be full countercurrent flow, greatly enhancing the heat transfer effect, even if the two small temperature difference between the media, can also achieve the ideal heat transfer effect.

2、The receiver on the shell adopts tangential structure, with small local resistance. As the curvature of the spiral channel is uniform, the liquid flows in the equipment without large turning, and the total resistance is small, thus the design flow rate can be increased to make it have high heat transfer capacity.

3、I type non-detachable spiral plate heat exchanger adopts welded seal on the end face of the spiral channel, so it has high sealing.

4、Type II detachable spiral plate heat exchanger has the same structure principle as the non-detachable heat exchanger, but one of the channels can be disassembled for cleaning, which is especially suitable for heat exchange of viscous and sedimented liquids.

5、Type III detachable spiral plate heat exchanger has the same structure principle as non-detachable heat exchanger, but two of its channels can be detached for cleaning, which is more applicable to a wide range.

Basic parameters

1. Spiral plate heat exchanger nominal pressure PN specified as 0.6, 1, 1.6, 2.5Mpa (i.e. the original 6, 10, 16, 25kg / cm) (refers to the maximum working pressure of a single channel) test pressure for the working pressure of 1.25 times.

2. spiral plate heat exchanger and media contact part of the material, carbon steel Q235A, Q235B, stainless steel acid port SUS321, SUS304, 3161. other materials can be selected according to user requirements.

3. Allowable working temperature: t=0-+350℃ for carbon steel. Stainless steel acid steel t=- 40-500℃. Temperature rise and pressure drop range according to the relevant provisions of the pressure vessel, the selection of this equipment, through the appropriate process calculations, so that the fluid in the equipment channel to achieve turbulent state. (General liquid flow rate 1m/Sec gas flow rate 10m/Sec). The equipment can be placed lying down or standing, but can only be placed standing when used for vapor condensation; it must be used in the caustic soda industry for overall heat treatment to eliminate stress.

4. When choosing equipment, appropriate process calculations should be made to make the liquid in the equipment channel reach turbulence (general liquid speed ≥ 0.5m/s; gas ≥ 10m/s).

5. Equipment can be placed lying down or standing, but only standing when used for steam condensation.

6. Used in the caustic soda industry must be heat-treated as a whole to eliminate stress.

7. When the difference in flow values between the two sides of the channel is large, unequal spacing channels can be used to optimize the process design.

Anti-clogging principle

Spiral plate heat exchanger compared with the general column tube heat exchanger is not easy to block, especially sediment, small shells and other suspended particles impurities are not easy to deposit in the spiral channel, mainly in.

1. because it is a single channel impurities deposited in the channel as soon as the formation of turnover of the flow will also be raised to wash it out.

2. Because there is no dead space in the spiral channel, impurities are easily flushed out.

Features

1. High heat transfer efficiency (good performance)

It is generally believed that the heat transfer efficiency of the spiral plate heat exchanger is 1-3 times that of the column tube heat exchanger. Single channel of equal cross-section does not exist in the flow dead zone, fixed distance column and spiral channel on the flow of perturbation to reduce the critical Reynolds number of fluid, water-water heat transfer when the spiral plate heat exchanger heat transfer coefficient of up to 3000W / (㎡.K).

2、Effective recovery of low-temperature heat energy

Spiral plate heat exchanger is made of two rolled sheets for waste heat recovery, making full use of low-temperature heat energy.

3、Strong operational reliability

Non-detachable spiral plate heat exchanger spiral channel end face using welded seal, and thus has a high degree of sealing to ensure that the two working media do not mix.

4、Low resistance

The receiver on the shell adopts a tangential structure. Comparatively low pressure loss, dealing with large-capacity steam or gas; self-cleaning brush ability, because its medium is spiral flow, dirt is not easy to deposit; easy to clean, available steam or alkali flushing, simple and easy, suitable for the installation of cleaning devices; media go single channel, allowing the flow rate is higher than other heat exchangers.

5、Multiple units can be used in combination

Single equipment can not meet the requirements of use, you can use more than one combination, but the combination must comply with the following provisions: parallel combination, series combination, equipment and channel spacing the same. Mixed combination: a channel in parallel, a channel in series.

Instructions for use

1, equipment installation, should be familiar with the system process of engineering and technical guidance, in accordance with this manual and product quality certificate and its system process characteristics, to determine the installation process plan. In the installation, consideration should be given to absorbing thermal expansion as much as possible using the direction of the pipeline, and the installation should be horizontal and square, and no additional stress should be generated to avoid adverse effects on the equipment. Pipeline coupling should make the two processes completely countercurrent state to improve the heat transfer effect.

2, the installation should be cleaned before the piping system, there should be no mud and sand, debris, etc. remain in it; check whether the heat exchanger is damaged in transport, whether there is a large debris fall into the mouth of the pipe.

3、Equipment installation is complete, the equipment and system should be hydrostatic test.

4, water pressure test is completed, the equipment should be insulated.

5、Circulation must be softened or dosing treatment. (According to the low-pressure boiler water quality standards GB1576-96), due to improper water treatment caused by scaling, available chemical cleaning and descaling.