Although reagent dosing plants in the petroleum and petrochemical industries do not directly produce products, they are an indispensable “guardian” and “lubricant” in the entire production chain. Using automated and precise chemical techniques, they solve the most pressing production problems such as corrosion, scale formation and media separation, providing critical safety, environmental, efficiency and economic support to oil and petrochemical plants.
Depending on the type of reagent, dosing units are distinguished: corrosion inhibitor, demulsifier, defoamer, inhibitor (moderator), neutralizer, scale inhibitor, antioxidant, metal passivator, catalyst, etc.
1. Precision and reliability: High-precision dosing pumps and intelligent control systems are used to accurately control the dosage and timing of the reagent, ensuring that it acts at the right time and place, avoiding wastage or insufficient dosage.
2. Efficiency and continuity: 24/7 automatic supply of reagents is ensured, guaranteeing process continuity and stability and preventing the risk of production stoppages or instability due to untimely manual dosing.
3. Increased safety: The frequency of direct contact of operators with toxic, flammable, corrosive chemicals is reduced. Effective protection against corrosion and scale significantly reduces the risk of leaks, fires, explosions and other accidents caused by corrosion or blockage of pipelines and equipment.
4. Automation and intelligentization: Can be integrated with the main control system (DCS/SCADA), which allows remote monitoring, data logging, fault alarm and interlocking control, which is an important part of building a “smart field” and “smart factory”.
◆ Production in oil and gas fields: at wellheads, gas collection points, central collection points - dosing of corrosion inhibitors, demulsifiers, defoamers, hydrate formation inhibitors.
◆ Main pipelines: at pumping stations and pig cleaning stations for oil and gas pipelines - dosing of corrosion inhibitors, anti-turbulence additives, hydrate formation inhibitors.
◆ Oil refining and petrochemical plants: at atmospheric-vacuum distillation, catalytic cracking, hydrotreating plants, etc. – dosing of neutralizers, corrosion inhibitors, scale inhibitors, metal passivators, antioxidants.
Review
JY series dosing equipment is designed to meet the needs of the market and customers, as well as to provide production automation in such fields as petroleum, chemical, oil refining, gas production, water supply, thermal power, pharmaceuticals, food processing and others. It uses advanced technology and production processes from the United States, Germany, Japan and other countries, strictly in accordance with the requirements of technological standards and taking into account the actual conditions of China.
JY series dosing equipment is characterized by completeness, advanced technology, high degree of automation, convenient operation, easy maintenance, and the ability to meet the needs of various operating modes. Custom products can also be designed and manufactured to meet specific user requirements.
JY series dosing devices are widely used for dosing reagents in boiler water (ammonia, hydrazine, phosphates), dosing into source water (flocculants, coagulants, acids, alkalis, etc.), dosing into circulating water (corrosion inhibitors, scale inhibitors, fungicides, concentrated sulfuric acid, alkaline solutions, etc.), for chemical additives in oil and gas fields, waste and sewage water treatment, as well as in other operating modes.
The JY series dosing device consists of a solution tank, stirrer, level indicator, dosing pump, filter, damper (buffer), safety valve, various types of fittings, electrical control part, common base with platform and ladder, and pipeline fittings.
Check valve
Complete dispensing devices include the following three categories: simple dispensing device, integrated dispensing device, separate dispensing device.
Simple dosing device
The simple dosing device is equipped with a small dosing pump, stirrer, level sensor and other accessories. All of them are directly installed on the dosing barrel. Thanks to its flexible configuration, small footprint and high efficiency, it is very suitable for use in small dosages. Optional accessories: injection valve, pulsation damper, back pressure valve, control cabinet, etc.
Integrated dosing device
An integrated dosing device means installation in a single unit, that is, the solution tank, agitator, level gauge, dosing pump, control cabinet, ladder platform and other accessories (such as safety valves, dampers, check valves, etc.) are all installed on one channel base.
The metering device combination covers various types, such as "one tank - one pump", "one tank - two pumps", "two tanks - two pumps", "two tanks - three pumps", "two tanks - four pumps", as well as multi-tank configurations with pumps, etc.
Based on the control method, a basic type and an intellectual type are distinguished. The basic type is an open ramp dosing system. The necessary accessories can be selected to ensure more accurate dosing.
Intelligent dosing control system means open-loop control to achieve a fixed proportion. It can also realize closed-loop automatic control based on the set parameter signal and communicate with the superior computer (host computer).
Advantages of an integrated dosing device
1. Aesthetic appearance, varied design, flexible configuration.
2. Stable performance, compact structure, small footprint.
3. Ease of use, high ability to combine.
4. Wide functionality, large selection of accessories, flexible expansion of functions.
5. Ability to design specific dosing system based on user requirements.
Separate dosing device
The separate dosing device is used in some special conditions, such as large dosing volume, specific dosing medium, when it is inconvenient to combine the solution tank and dosing pump in one unit. If the customer has a large solution tank, the dosing pump unit should be installed separately from the solution tank, and then its inlet should be connected by a pipe to the solution tank outlet. Such a device is called a split dosing device. The solution tank may be a large polyethylene container, a stainless steel container, or a cement tank, etc. The pump dosing unit is determined by the number of dosing points, usually it is a single-pump type, a two-pump type (one working, one standby), a three-pump type (two working, one standby), a four-pump type (two working, two standby). The base of the pump dosing unit is made of high-strength channel. The pipeline is secured using brackets and is characterized by its small footprint and rational design.
The all-plastic pneumatic diaphragm pump can pump not only fluid liquids, but also transport some non-fluid media. Compared with self-priming pumps, submersible pumps, shielded motor pumps, clay slurry pumps and solids pumps, this model has many advantages.
This series of chemical pumps for corrosive liquids are vertical, the suction and discharge pipes of the pump have the same diameter, and their center lines are on the same horizontal line and orthogonal to the vertical shaft.
This pump can operate without water, is not subject to rapid wear, is easy to assemble and maintain, and has a long service life.
The three-chamber solution preparation unit is designed specifically for dissolving and preparing solutions of high molecular weight polymer – polyacrylamide (PAM). Mainly used for flocculation treatment of industrial wastewater, flocculation in sludge dewatering, drinking water treatment, and wastewater treatment in chemical, pulp and paper and other industries.
The FSC (single stage, single stroke) PTFE alloy centrifugal chemical pump - hereinafter referred to as "FSC centrifugal pump" - is designed and manufactured in accordance with international standards and based on non-metallic pump technology.
DN25–DN1200; PN16–PN160, Class150–Class900; cryogenic steel LF3, stainless steel; t=-196℃…+120℃, extended rod, flanged and welded connection.
This series of horizontal centrifugal pumps are horizontal, radial split, open back, single stage, single suction volute type centrifugal pumps. The design of the impeller is closed type. The pump body has an axial suction pipe, a discharge pipe located on top, and a foot support.
The DG series segmental multistage centrifugal pumps use tension pins to connect the suction section, intermediate sections and discharge section into a single unit.
An automated system of equipment for accurately dosing certain chemical reagents into the water being treated (“source water”). The main task is “accurate, continuous, automatic” dosing of reagents, replacing the unstable and ineffective manual method.
The outlet diameter and the inlet diameter are the same. SKF bearings, a world famous brand, ensure more stable operation.
MHT series slurry pump is a specialized equipment developed by our company for clay mining industry (Pengrun), abrasive and grinding industry, power plant desulphurization and bauxite slurry conveying in aluminum smelter.
Thanks to the reciprocating movement of the plunger, the working medium is directly sucked in or pumped out. Since the plunger and seal are in direct contact with the fluid, the correct choice of plunger material and seal type will ensure more ideal pump performance during operation.
The centrifugal chemical pump made of fluoroplastic type FSC (hereinafter referred to as the pump) developed by our company is a single-stage, single-pass cantilever centrifugal pump. It is manufactured using superior hydraulic design and advanced, proven processing technology.
The 3HS25 series high-pressure three-screw pump is designed for use in the machine tool industry and is suitable for pumping various cooling and lubricating materials (coolants, emulsions, cutting fluids, etc.) required for machine tool processing. Provides precise washing, cooling, lubrication, crushing and chip removal of workpieces and tools, extending tool life and improving machine precision.
Technical parameters: capacity up to 100 m³/h, pressure up to 48 bar
IJ type chemical process pump is a standardized chemical process pump upgraded and improved by our company based on IH pump. This pump adopts a single-stage, single-pass cantilever design, and its operating parameters comply with GB5662-85 standard (equivalent to ISO2858-1975).
