Critical equipment for the chemical pulp mill

Black liquor evaporation is an essential part of the chemical recovery process as it significantly concentrates the dry solid matter in black liquor so that the liquor can be effectively combusted in recovery boiler. The water removed from the liquor can be segregated and processed so that it can be reused in the mill – reducing fresh water requirements, effluents, and saving money.

Evaporators and concentrators, with their lamella heating surfaces, are adept at processing the spent cooking liquors or mill effluents using the minimum amount of energy while maximizing product dry solids, plant availability, and condensate quality. The lamella heating surfaces are inherently non-scaling. This allows the use of various heat sources inside the lamella, allowing the mill to select the most energy-efficient process connection.

Heat transfer plate

The heat transfer plate consists of two thin plates, which are completely welded around by laser welding process, and the middle area is full of pillow pattern; after forming process, pillow shaped cavity is formed inside the heat transfer plate. Pillow design creates excellent turbulence and provides self-supporting structure. In practical application, additional welding path is often added in the heat transfer plate to adjust and control the interface position of fluid in and out of the heat transfer plate, the flow velocity and flow rate of fluid in the plate, so as to optimize the heat transfer effect.
Advantages of heat transfer plate technology:
Excellent turbulence design, high heat transfer coefficient;
high welding reliability;
small resistance on the external surface, not easy to produce dirt;
high temperature and high pressure resistance;
wide channel, low pressure drop, easy to clean;
flexible shape design, optimization of heat transfer effect.

Falling Film Concentrator

Falling Film Concentrators are really an adaptation for high solids service of the FF evaporator design discussed above. By nature, FF concentrators, where evaporation takes place from a liquor film within the heating element result in high supersaturation levels being developed within the liquor. This can result in uncontrolled scale formation due to excessive crystal nucleation rather than gentle crystal growth.
Some FF concentrator designs actually do not even attempt to control scale formation on the heating surfaces, but rather provide a mean to remove such scale faster than it forms and before it can negatively impact capacity or lead to plugging. Quick switching designs,commonly used with plate and tubular-element units, rely on this strategy by continuously moving multiple concentrator bodies (or chambers within the same body)between product liquor and washing positions.

MVR Technology
MVR technology is to compress the secondary steam of the evaporator by mechanical method, increase its pressure and temperature, increase its enthalpy, and then send it back to the heating chamber of the evaporator to be used as heating steam, so as to keep the feed liquid in boiling state, while the heating steam itself condenses into water. Compared with the multi effect evaporation technology, MVR technology compresses and recycles all the secondary steam and recovers the latent heat, so it is more energy-saving than the multi effect evaporation technology.

MVR Technology advantage:
There is no need for fresh steam after start-up, or a small amount of fresh steam is consumed, so the operation cost is low.
Easy to start,Simple structure, single effect operation, simplify the pipeline, instrument, electrical system.
simple operation, stable operation, less maintenance.
It occupies a small space and has few utilities. In general, there is no need for condenser and cooling tower.

Company Capabiltiy

Customer site

Jiangsu Hanpu Mechanical Technology Co., Ltd. is a project engineering company jointly established by Jiangsu Zhongyi Environmental Technology Co., Ltd., FERREO A/S in Denmark, Shanghai Jiaotong University and Nanjing Kingreat Machinery Co., Ltd. The company's production base is located in the Huangqiao Industrial Zone of Taixing, covering an area of 300 acres. The companies involved are in the industry of new material, new energy, medicine, chemical, environmental protection, food, and beverage, etc.

The company has a national functional office and facilities as a scientific research bureau. The research center now has 5 doctor tutors, 8 professional engineers, 11 senior engineers, 42 engineers and 68 assistant engineers making it a leading specialized research bureau.

The company has various kinds of general (special) machinery devices including 480 sets and are the most developed working devices in the world such as: Toshiba CNC boring and milling machine imported from Japan, German Schiess CNC turning processing center, CNC fine plasma cutting machine imported from Germany, Laser cutting machine, CNC folding machine, CNC wire cutting and CNC shearing machine, etc.

The company's main projects include but are not limited to: MVR evaporation system, powder washing salt and vacuum salt production project, oil tank sludge cleaning project, landfill leachate treatment project, plant/animal oil processing production line, urban wastewater treatment project, various wastewater treatment projects, and CBD oil extraction production line. Technical support and transfer of API product technology package. The main products are centrifuge series, multi-effect and MVR evaporation and crystallization equipment, laser welding heat transfer board, lithium battery material mixing equipment, pressure vessel and titanium, zirconium, nickel, and other non-standard special equipment.

The company's sales network throughout the whole world, with a domestic sales market share of 50%, and exported to the United States, Canada, Germany, Spain, France, Switzerland, Sweden, Denmark, Australia, Brazil, Argentina, Chile, Colombia, Russia, Ukraine, Poland, Uzbekistan, Indonesia, Vietnam, Singapore, Malaysia, India, Japan, South Korea, Iran, South Africa, Nigeria, and Rwanda.

The company is an internationally competitive engineering company that integrates technical consulting, design, procurement, construction, installation and driving into one, providing engineering EPC general contract, project management, engineering supervision and other comprehensive, full-process services. The company is Committed to be the first and world-renowned technology and technology engineering company in Asia, providing cutting-edge technology and one-stop solutions for the world's industries.