国产免费一级精品视频-国产免费一级片-国产免费一级视频-国产免费一级在线观看-亚洲国产成人精品区-亚洲国产成人精品一区91

1、 Overview

The Z-series rotary scraper thin film evaporator produced and manufactured by our factory is a new type of high-efficiency evaporator that forcibly forms a film through the rotary scraper and can perform film falling evaporation under vacuum conditions. It has a high heat transfer coefficient, high evaporation intensity, short flow time, and high operating flexibility, especially suitable for evaporation concentration, degassing, desolvation, and distillation purification of heat sensitive materials, high viscosity materials, and easily crystallized materials containing particles. Therefore, it has been widely used in industries such as chemical, petrochemical, pharmaceutical, pesticide, daily chemical, food, and fine chemical.

Our factory has been producing and manufacturing this type of equipment for over ten years, accumulating rich experience in manufacturing and usage. For many years, based on market demand and closely combining with the actual production of users, with the premise of meeting their process requirements, we have chosen reasonable and suitable equipment structures to ensure high-quality and reliable manufacturing quality. We have continuously improved and improved in terms of tooling equipment, testing methods, and product design, and have achieved remarkable results. Our technical level and product quality are at the domestic level.

2、 Structural characteristics

The main structure of the Z-series thin film evaporator is shown in Figure 1, and each structural component is described as follows:

1. Motor and reducer

It is a driving device for rotor rotation. The rotational speed of the rotor will depend on the form of the scraper, the viscosity of the material, and the inner diameter of the evaporation cylinder; Choosing the appropriate linear speed of the scraper is one of the important parameters to ensure stable and reliable operation of the evaporator and satisfactory evaporation effect.

2. Separation cylinder

The materials enter the evaporator tangentially from the inlet at the lower end of the separation cylinder body, and are continuously and evenly distributed on the inner wall of the evaporation cylinder body through the distributor installed in the separation cylinder body. The secondary steam evaporated from the evaporation cylinder body rises to the separation cylinder, and is separated from the liquid drops or foam that may be carried by the secondary steam through the gas-liquid separator installed inside. The secondary steam is led out of the evaporator from the outlet at the upper end.

The reasonable design of the separation cylinder body based on the calculation of internal resistance in the evaporator is one of the key factors to avoid material "short circuits". The so-called "short circuit" refers to the situation where the material has just entered the evaporator and has not yet completed the evaporation process, i.e. leaves the evaporator from the secondary steam outlet

3. Distributor

The distributor is installed on the rotor. Reasonable design ensures that the material entering the evaporator from the tangential direction is continuously and evenly sprayed onto the evaporation surface through a rotating distributor.

4. Gas liquid separator

The rotary vane gas-liquid separator is installed above the separating cylinder, which traps the liquid drops or foam that may be carried by the rising secondary steam and makes it fall back to the evaporation surface.

5. Evaporation cylinder body

Also known as the heating cylinder body. It is an evaporation surface where the material forced to form a film by a rotating scraper exchanges heat with the heating medium inside the jacket. The inner diameter and length of the evaporation cylinder are determined by the evaporation area and appropriate aspect ratio.

The inner wall of the heating cylinder is processed and polished by a dedicated machine tool, and the connecting surfaces with the flanges at both ends are processed in one go to ensure the overall roundness of the equipment. The inner wall of the cylinder after polishing (mirror polishing if necessary) is smooth, clean, and bright, and is not prone to sticking and scaling, effectively ensuring the high heat transfer coefficient of the equipment.

If the heating medium is steam, the heating cylinder body generally adopts a jacket form.

If the heating medium is thermal oil or high-pressure steam, the heating cylinder body generally adopts a half tube form.

6. Rotor

Installed in steam

The above table mainly applies to the list of unemployed and typical materials:

Thin film evaporators can be used for chemical unit operations such as material concentration, degassing, desolvation (solvent recovery), purification, etc. The following processes are available for reference:

1. Material concentration (evaporation of moisture) is shown in Figure (8)

2. Desolvation or purification as shown in Figure (9)

3. As the reboiler of the distillation tower, see Figure (10A, B)

4. Composed of a multi effect evaporator with a tubular evaporator, as shown in Figure (11)

5. Compose a multi-stage distillation with a short range still, as shown in Figure (12)

6、 Selection instructions for thin film evaporator

The selection of thin film evaporators should comprehensively consider various factors, which are interrelated and generally need to consider:

1. Determination of evaporation area:

▲ Calculation of evaporation capacity: Calculate the evaporation capacity per unit time (Kg/h) based on the processing capacity and inlet/outlet concentration;

Estimate the evaporation intensity of the evaporator based on the viscosity, concentration, and evaporation temperature of the material;

Consider a certain amount of surplus and calculate the required evaporation area.

2. Determination of vacuum degree

The acquisition of vacuum degree is at the cost of energy consumption, as long as the evaporation requirements are met, there is no need to require too high vacuum degree;

Estimate the vacuum degree at this evaporation temperature based on the thermal sensitivity of the material;

▲ Consider the possibility of leakage and the frictional resistance of secondary steam to determine the required vacuum level;

3. Determination of scraper form and material

▲ According to the physical and chemical properties of materials such as viscosity, crystallization tendency, foam, etc., select the appropriate scraper form, and consider the evaporation temperature to determine the appropriate material;

4. Determination of thermal medium

Based on the required evaporation temperature and heat consumption, determine the use of a suitable thermal medium such as steam, hot water, or thermal oil.

5. Determination of evaporator material selection

6. Selection and determination of motor explosion-proof performance

Our factory has accumulated years of practical application experience and will assist customers in making appropriate product selection without reservation.

Note: "We have a small prototype and welcome customers to come and test it““