Introduction to the Types and Functions of Valves Equipped on Laboratory Reactors

Laboratory reactor manufacturers equip their production processes with a variety of valves, each of which has its own unique characteristics and application areas. First, the gate valve: This is a commonly used shut-off valve designed to connect or isolate the medium in a pipeline; however, it is not suitable for regulating the flow rate of the medium. Gate valves are typically employed in laboratory reactors where pressure, temperature, and pipe diameter can vary significantly. Second, the globe valve: Also a type of shut-off valve, similar to the gate valve—but unlike the gate valve, the globe valve is more appropriate for applications involving smaller pipe diameters. Third, the throttling valve controls fluid pressure and flow rate by altering the cross-sectional area of the flow passage. It is a type of control valve; however, due to its design...

The technical parameters of the stainless steel reactor have received unanimous acclaim both domestically and internationally.

Stainless steel reactors offer advantages such as rapid heating, high-temperature resistance, corrosion resistance, hygiene, no environmental pollution, automatic temperature control without the need for a boiler, and ease of use. They are widely used by manufacturing enterprises in industries including petroleum, chemical engineering, rubber, pesticides, dyes, pharmaceuticals, and food, as well as in various scientific research and experimental projects. These reactors serve as vessels for carrying out a wide range of process operations, including hydrolysis, neutralization, crystallization, distillation, evaporation, storage, hydrogenation, hydrocarbonization, polymerization, condensation, heated mixing, and constant-temperature reactions. A key feature of stainless steel reactors is their internally polished mirror-finish surface, which ensures there are no sanitary dead spots. The fully enclosed design guarantees that materials remain in a sterile environment at all times. The exterior surface can be optionally coated with a spray finish.

The Role of Baffles Installed Inside Magnetic Stirred Reactors and Determination of Relevant Data

Sometimes, baffles are added to the inner wall of a magnetic stirrer reactor. The functions of these baffles are as follows: First, when the viscosity of the material is relatively low, the high-speed rotation of the impeller generates a tangential flow under the influence of centrifugal force, which causes the liquid to be flung toward the reactor walls and rise along the perimeter of the vessel, while the liquid level in the center naturally drops, thereby forming a large depression inside the magnetic stirrer reactor—this phenomenon is referred to as "whirlpool formation." The material caught in the whirlpool rotates closely along with the stirring shaft and fails to achieve adequate mixing. If the mixture contains multiple phases, phase separation or layering may occur. Second, when the viscosity of the material is relatively high, a large amount of air is drawn into the surface of the liquid layer, reducing the liquid's surface tension.

Design Method for Industrial Reactors

Before manufacturing, industrial reactors must have their volume, vessel dimensions, and cylinder wall thickness confirmed based on the requirements of the production process. Below, the designers from Weihai Self-Control Reactor Co., Ltd. will guide you through simple conversions related to these issues. I. Volume: The material balance should be calculated based on the reaction time and target production volume. (1) Calculate the processing capacity of raw materials or the output of products per unit time. Using this processing capacity or output along with the rate equation, determine the reaction time. Based on the reaction time, calculate the effective volume of the reactor. The total volume of the equipment is equal to the effective volume divided by a factor of 0.6 to 0.8. II. Nominal Pressure for the Reaction: When the reaction…

2016 Shanghai International Reactor Exhibition

The “2016 Shanghai International Reactor and Mixing Technology Equipment Exhibition” was grandly held from December 1 to 3, 2016 at the Shanghai New International Expo Center. ◆ Exhibition Scope: ▲ Reactors: High-pressure reactors, hydrogenation reactors, magnetic stirrer reactors, chemical reactors, enamel reactors, stainless steel reactors, electrically heated reactors, jacketed reactors, laboratory reactors, half-tube reactors, enamel-lined reactors, high-pressure reactors, enameled glass reactors, magnetic stirrer reactors, autoclaves, steam-pressure vessels, polymerization reactors, sulfur-melting reactors, enamel reactors, crystallization reactors, sterilization reactors, distillation reactors, cracking reactors, hydrolysis reactors.

Instructions for the Pressure Test Method of Hydrogenation Reactors (Part 2)

In the previous issue, we discussed the testing methods used in the hydraulic pressure test of high-pressure hydrogenation reactors. Next, we’ll explain the pneumatic pressure test: 1. During the pneumatic pressure test, safety measures must be in place, and the gas used for the test should be dry, clean air, nitrogen, or other inert gases. 2. For high-pressure hydrogenation reactors made of a single material, the medium temperature during the pneumatic pressure test must not be lower than room temperature. For hydrogenation reactors with linings or composite layers, the medium temperature must not be lower than 15°C. 3. During the test, the pressure should be increased slowly—up to 10% of the specified test pressure, but not exceeding 0.05 MPa—and held at that pressure for 5 minutes, then...

Commonly Used Head Types for High-Pressure Reactor Equipment and Their Respective Characteristics

The commonly used head forms for high-pressure reactors mainly include hemispherical, elliptical, butterfly-shaped, and flat-head types. From the perspective of process operation requirements, there are no special demands on the shape of reactor heads. However, since flat-head heads exhibit significant edge stresses and flat-plate heads tend to be relatively thick, these two types of heads are not recommended for use in high-pressure reactors. The hemispherical head shares the same advantages as spherical vessels: under the same volume, it has the smallest surface area; and under the same diameter and pressure, it requires the thinnest wall thickness and the lightest weight, making it highly cost-effective in terms of manufacturing. Nevertheless, due to its great depth, it is more difficult to manufacture, and thus is typically used in medium- and low-pressure, small-volume reactors.

Structure and Principle of an Autoclave

A piece of equipment used in industrial settings for carrying out chemical reactions under high pressure. Some models are equipped with stirring or heat-transfer devices. It is also referred to as a pressurized reactor. The reactor lid is fitted with a pressure gauge, a rupture disc safety device, vapor-liquid phase valves, temperature sensors, and other components, allowing operators to monitor the reaction conditions inside the reactor at any time, adjust the proportions of the media within the reactor, and ensure safe operation. Conceptually, this is a piece of equipment used in industry for conducting chemical reactions under high pressure; some models come equipped with stirring or heat-transfer devices and are thus also called pressurized reactors. Basic Structure and Principle: 1. The reactor body and lid are fabricated from 1Cr18Ni9Ti stainless steel. The reactor body is connected to the flange via threads, while the reactor lid is a flat, solid-type cover. The two components are joined together by evenly distributed main bolts arranged circumferentially.

Maintenance and Care of Laboratory Reactors

To reduce the occurrence of malfunctions in laboratory reactors, regular maintenance and upkeep are essential: 1. The laboratory reactor should be placed in a well-ventilated and dry area. In particular, the control system must be kept away from humid or corrosive environments to avoid shortening the equipment’s service life. 2. During transportation, anti-vibration measures should be taken to prevent severe vibrations from loosening connections, causing the reactor lid to become loosely attached to the reactor body, or damaging the sealing surfaces. 3. Keep the working environment clean to prevent dust and contaminants from causing poor electrical contact in the equipment’s wiring and other components. 4. Ensure that wire connections remain in good condition. If used for an extended period, check for insulation degradation or loose connections in aviation connectors.

Configuration and Matching Instructions for Hydrogenation Reactor Systems

Weihai Self-Control Reactor Co., Ltd. is a domestic, specialized manufacturer of equipment配套 for gas-liquid phase catalytic reactors. The typical process flow for liquid-phase catalytic hydrogenation includes a hydrogenation reaction system, a catalyst filtration system, and other supporting systems such as hydrogen supply, sampling, cooling, and product purification. Different processes require different process flows and equipment configurations. The reaction system is generally designed for batch production; under special requirements, it can also be designed for continuous production. The core equipment of the hydrogenation reactor unit is the self-suction gas-liquid reactor, which consists of a high-pressure reactor and a stirring device. The reactor features a specially defined height-to-diameter ratio and is equipped with coil tubes and a jacket to facilitate preheating and counter-reaction of the materials.

Use and Maintenance of Laboratory Reactors (Part 1)

After long-term exploration by our manufacturer, we’ve found that if users properly operate and promptly maintain laboratory reactors, they can effectively extend the equipment’s service life. Next, let me walk you through the operating procedures for the control unit. The circuit principles of the control sections in various models of laboratory reactors differ significantly, so their operating procedures should be followed precisely according to the instructions provided in the equipment manuals. The standard operating procedure is as follows: 1. Preparations for power supply: (1) Connect the control unit using power cords and cables, then connect the reactor vessel and its lid, and securely tighten the safety devices to ensure good electrical contact and display functionality. (2) Check the electricity being used...

Application Characteristics of Reactors in the Production of Food Products Such as Flavors and Fragrances

Flavorings and fragrances are two types of additives commonly used in food products; however, these two products are not the same. A fragrance is a single, pure substance, whereas a flavoring is a blend created by artificially combining various individual fragrances. Fragrances can be produced through methods such as pressing, extraction, adsorption, and steam distillation, while flavorings are primarily manufactured by carefully blending different fragrance compounds and other ingredients according to specific formulations. Therefore, during the production of flavorings and fragrances, reaction vessels are mainly used for fragrance products. Over the years, our company’s collaboration with fragrance manufacturers has revealed that this type of production equipment has certain unique characteristics and specific requirements: 1. Material of reaction vessels: Since these vessels are used for food additives...