The Transformer Strong Oil-Water Cooler is a newly developed heat exchange equipment with wide applications, featuring high heat transfer efficiency, low resistance loss, stable and reliable operation, compact structure, and affordable price. China began researching and manufacturing it in the late 1960s and established corresponding technical standards. With considerable experience in manufacturing and use, it is now widely used in the petrochemical refrigeration, organic chemical food, dye, alkali, pharmaceutical, mechanical, and metallurgical industries. It has been used as a transformer cooler for nearly two decades, with excellent performance. The Spiral Strong Oil-Water Cooler is a spiral formed by rolling two sheets of 2-3mm thick steel plates into two even spiral channels. At the ends of the two spiral channels, which are the upper and lower sides and the tangential direction of the spiral body, pipe connections and flanges are welded. Each channel contains a loaded liquid (oil and water) in a full countercurrent state for heat exchange. The cooling area is the sum of the unfolded length of the two steel plates multiplied by the width of the steel plates. To enhance the rigidity of the steel plates and increase the critical pressure of the spiral, fixed spacers of a certain density are welded on the same phase surface of the two steel plates, which also increases the fluid's turbulence, raises the Reynolds number, and improves the heat transfer efficiency.

Due to the uniform curvature of the spiral channel, there is no significant redirection of fluid, resulting in lower resistance and no dead corners. To enhance heat exchange efficiency, the fluid flow rate is typically increased within the channel, which can prevent clogging of the channel with debris. Additionally, the channel itself has an auto-cleaning function. Moreover, exhaust (liquid) ports are provided in the two spiral channels for ease of operation and can also be used for sampling and testing.

Section II: Features:

High thermal efficiency

The overall heat transfer coefficient can reach 3300 Kcal/m²·h·°C, with better heat transfer efficiency than the YF (air-cooled) spiral plate cooler. Its heat transfer coefficient is 1-3 times that of traditional tube bundles, thereby saving energy and offering good economic performance.

2. Low heat loss

This oil cooler features a compact structure with minimal footprint and exposed surface area. If the ambient fluid flows from the outer edge to the center of the oil cooler, insulation is not required.

3. Structurally reliable

Oil and water channels are rolled as a whole sheet, sealed with welding, ensuring that oil and water do not mix during heat exchange, thereby allowing the transformer to operate safely.

4. Self-cleaning feature

This oil cooler can appropriately increase the fluid flow rate without significantly raising the pressure drop, enhancing heat transfer efficiency. The fluid flows in a spiral pattern, featuring an automatic cleaning function that prevents dirt buildup, thereby reducing downtime for maintenance and saving on repair costs.

Section 3: Technical Specifications:

1. Nominal pressure is specified as 0.6 Mpa (note: refers to the working pressure the single channel can withstand; the test pressure in our factory is 1.25 times the design pressure).

2. Operating Temperature Range: The carbon steel heat exchanger allows a temperature range of 1℃ to +200℃, while the stainless steel heat exchanger permits a range of 1℃ to +300℃. The temperature and pressure adjustment range for the carbon steel heat exchanger should comply with relevant operational specifications.

3. When selecting equipment, appropriate process calculations should be performed to determine the fluid's optimal operating state, ensuring the fluid within the oil cooler passages reaches turbulent flow conditions (typically, liquid velocity ≥ 1 m/sec, gas velocity ≤ 10 m/sec).

4. Users can select different materials based on varying operating conditions.

5. When using a single cooler, it is generally operated with two oil pumps, one in use and the other as a backup. If a single unit cannot meet the operational requirements, multiple units can be used in combination; however, the assembly must comply with the following regulations:

① Parallel combination: Limited to heat exchangers of the same specification.

② Series Combination: The plate width and channel spacing of the heat exchanger should be the same.

③ Mixed Combination: One channel in parallel, another in series, limited to heat exchangers of the same specification.

6. Installation Types: Horizontal and Vertical. Vertical installation is used to ensure that the material is completely drained after parking.

7. The orientation of the oil cooler inlet is as per the product's factory drawings. Select the pipe nominal diameter according to Table 1. If the customer has special requirements, they may negotiate with our technical department. After the customer selects the specifications, they can write to request a reference drawing of the external dimensions.