Sewage Treatment Deep Dehydrator Machine Equipment in Chemical Plant

• Customization: Available
• After-sales Service: 7*24h
• Warranty: 1year
• Model NO.: KJH-MLD-5264
• Type: Sludge Dewatering Machine
• Method: Mix
• Usage: Industrial
• Product Name: Mother Liquor Drying Equipment
• Material: Titanium/Stainless/Carbon Steel
• Processing Capacity: ≥0.5t/H
• Heat Exchanger Type: Plate/Tube Heat Exchanger
• Power: 130kw/H
• Process Flow Direction: Downstream/ Countercurrent/ Crosscurrent
• Delivery Time: 100day
• Application Industry: Wastewater/Sewage
• Function: Evaporation, Concentration, Crystallization
• Installation Cycle: 30days
• Debugging Cycle: 7days
• Features: Complete Range of Models
• Transport Package: Plastic Film and Wooden Boxes
• Specification: KJH-MLD-5264
• Trademark: conqinphi
• Origin: Qingdao, China
• Production Capacity: 190 Sets/Year
• Package Size: 200.00cm * 100.00cm * 80.00cm
• Package Gross Weight: 590.000kg

Product Description

Advantages and Disadvantages

Comparison Items	Multi-Effect Evaporator	MVR Evaporator
Energy Savings	Good, improving with increasing number of effects, but with cumulative energy loss, cost-effectiveness decreases after exceeding a certain number of effect	Excellent, using mechanical vapor recompression technology and secondary steam recycling for significant energy savings, reducing energy consumption by 30%-50% compared to multiple-effect evaporators
Operating Cost	High, requires large amounts of steam and cooling water	Low, primarily consumes electricity, does not require large amounts of steam, and has low long-term operating costs
System Complexity	Relatively simple, consisting of a multi-stage evaporator and condenser	More complex, including a steam compressor, heat exchanger, separator, etc., requiring a control system
Investment Cost	Low initial cost, but high long-term operating costs	High initial cost, but significant long-term economic benefits
Applicable Scenarios	Processing large quantities of low-concentration solutions, with sufficient steam supply and low cost	Suitable for high-concentration, heat-sensitive materials with high energy-saving requirements
Footprint	Relatively large	Compact, small footprint
Cooling Water Consumption	High consumption	Rarely required
Operational Stability and Maintenance	A single failure may impact the entire system, resulting in complex maintenance	High degree of automation and excellent stability, but requires regular compressor maintenance
Environmental Impact	Requires raw steam, potentially generating higher carbon emissions	No steam required, reducing carbon emissions and improving environmental performance

In short, MVR and multi-effect evaporators:

MVR (Multi-Effect Refrigerator) follows the "electricity-saving and steam-saving" approach: low operating costs, small footprint, and low carbon emissions. However, the "compressor + high-quality materials" drive up initial investment, and it is sensitive to electricity and the boiling point rise of materials.

Multi-Effect Refrigerators (MVRs) follow the "steam relay" approach: low initial investment, wide adaptability to operating conditions, and low technical barriers. However, they are long burdened by the dual costs of "steam + cooling water," and the more effects a system has, the more complex it becomes.

MVR Evaporator

Multi-effect evaporator (3–6 effects)

1.Energy consumption and operating costs:Evaporation of one ton of water consumes only 20–45 kWh of electricity, equivalent to approximately 0.02–0.05 tons of steam equivalent, saving more than 70% compared to a triple-effect generator, with no cooling water consumption.

2.One-time investment:It requires a steam compressor, a large heat exchange area, and high-end materials (2205/titanium). The investment for a 10 t/h scale is 4.5-6 million yuan, which is about 2-3 times that of a similar scale triple-effect steam compressor.

3.System Complexity:A single-effect unit plus a compressor occupies 1/3–1/2 of the space, with a small vacuum pump and short piping; however, the compressor requires high-frequency maintenance and has high requirements for power grid capacity.

1.Energy consumption and operating costs:A triple-effect steam generator consumes 0.35–0.5 tons of live steam per ton of water, plus approximately 8–12 tons of circulating cooling water; a five-effect steam generator can reduce this to 0.25 tons, but the cooling water consumption increases exponentially.

2.One-time investment:No compressor required, simple equipment, 10 t/h triple-effect system all-inclusive price around 4 million yuan, low investment and short payback period.

3.System Complexity:3–6-effect series operation involves numerous pumps and valves, a large vacuum system, a large footprint, and a long installation period; however, it lacks high-speed rotating equipment and has a low technical threshold for maintenance.

Types of MVR evaporators

Single-effect MVR evaporator

MVR forced circulation evaporator

MVR tubular falling film evaporator

Advantages: Energy-efficient and highly efficient, utilizing mechanical vapor recompression technology to compress and heat secondary steam for recycling, significantly reducing energy consumption; highly automated, easy to operate, and stable operation.
Disadvantages: High equipment investment cost, high water quality requirements, and the need for regular cleaning and maintenance, which can affect performance and lifespan; limited processing capacity, making it suitable for small- to medium-sized production.

Advantages: Forced material circulation through a circulation pump prevents scaling and is suitable for high-viscosity, easily scaled materials. High evaporation efficiency allows for processing complex materials. Heat can be reused multiple times, resulting in significant energy savings.
Disadvantages: Complex equipment structure and high investment costs. Relatively high energy consumption requires a high-powered circulation pump and compressor. High operation and maintenance requirements can affect equipment performance and lifespan.

Advantages: High evaporation efficiency and high heat transfer coefficient, suitable for heat-sensitive materials; low energy consumption, utilizing a secondary steam compression cycle for heating, resulting in significant energy savings; compact structure, small footprint, easy operation, and a high degree of automation.

Disadvantages: High equipment investment cost, stringent water quality requirements, requiring regular cleaning and maintenance; unsuitable for easily crystallizing materials, as this may clog the pipeline; limited processing capacity, more suitable for small- to medium-sized production.

How it works

Working Principle of an MVR Evaporator

The MVR evaporator is a fast, energy-saving evaporation device. Its core principle is to recompress secondary steam using mechanical energy, thereby recovering the steam's latent heat. During the evaporation process, wastewater enters the evaporator's heating chamber. A small amount of external steam or electric heating initiates the evaporation process, generating secondary steam. This secondary steam is drawn into a centrifugal compressor or Roots compressor, where high-speed rotation or volumetric compression raises its temperature and pressure, typically by 10-20°C and 0.1-0.3 MPa. The compressed, 

high-temperature, high-pressure steam re-enters the evaporator's heating chamber, serving as a heat source to heat new wastewater, evaporating it and generating new secondary steam, forming a closed "steam-compression-reuse" loop. The condensed liquid produced by evaporation passes through a separator for solid-liquid separation, and the condensed liquid is discharged from the system.

Application

MVR evaporator application areas

Electroplating,Metallurgy,Metal smelting,Lithium batteries,Ternary lithium,Lepidolite,Traditional Chinese medicine concentrate,Chemicals,Petrochemicals,Fine chemicals,Rubber chemicals,Power,plants,Food,Pickling wastewater,Juice concentrate,Dairy processing,Printing and dyeing,Papermaking,Pharmaceuticals,Pharmaceuticals,Pesticides

Operation and maintenance precautions

Daily Operation and Precautions for MVR Evaporators

Pre-Startup Preparation
1.Equipment Integrity Check: Ensure the evaporator body, piping, valves, compressor, pump, and other components are intact, with secure connections and no leaks or looseness.
2.Electrical System Check: Confirm that the electrical cabinet has no missing phases and that the power load meets requirements. Check switches and wiring for proper operation.
3.Utility Check: Ensure the cooling water, steam, and compressed air supply is normal, with a circulating water pressure of 0.2-0.3 MPa.
4.Liquid Level and Lubrication Check: Confirm that the liquid levels in each storage tank are normal and that the seal water tank has sufficient liquid. Check the lubricating oil level in the compressor and pump.
5.Valve and Equipment Status: Ensure that manual valves are in the correct position and test the electric valves for proper operation.

Normal Startup Procedure
1.Start the Cooling System: Start the cooling water pump to ensure normal cooling water circulation.
2.Start the Steam System: Slowly open the steam valve and gradually increase the steam pressure.

3. Start the Compressor: Turn on the compressor and adjust the outlet pressure to achieve the preset vacuum level.
4.Feed Operation: Slowly open the evaporator feed valve and adjust the feed rate to ensure the material concentration meets the specified range.

Operation Monitoring
1.Monitor Operating Parameters: Regularly check parameters such as temperature, pressure, and flow rate to ensure the equipment is operating within the specified range.
2.Cleaning Key Components: Clean key components such as the heater and condenser to ensure stable performance.
3.Electrical System Inspection: Inspect the electrical and control systems to ensure proper operation.

Other Precautions
1.Water Quality Inspection: Check the incoming water quality before startup and perform pretreatment if necessary.
2.Cleaning Fluid Treatment: The cleaning fluid must be filtered or treated before discharge or reuse.
3.Professional Maintenance: Complex maintenance and cleaning work is recommended to be performed by a professional manufacturer.

Strictly following the above operation and maintenance procedures can effectively extend the life of the MVR evaporator and improve its operating efficiency and stability.

Company Profile

Qingdao Conqinphi Environmental Technology Group Co., Ltd. 

Qingdao Conqinphi Environmental Technology Group Co., Ltd. is a system integration manufacturer specializing in the evaporation and concentration of high-salinity wastewater. Conqinphi boasts its own 90,000 square meter processing plant and employs hundreds of people. It is a research and development-focused technology enterprise.

 

Conqinphi's main products include MVR evaporators, multi-effect evaporators (primarily triple-effect evaporators, quadruple-effect evaporators, double quadruple-effect evaporators, and double-effect MVR evaporators), zero-discharge industrial wastewater systems, plate and tubular heat exchangers, crystallizers, mother liquor treatment systems, and other wastewater treatment equipment. With a wide range of products, Conqinphi primarily provides clients with systematic equipment solutions, manufacturing, processing, installing, and commissioning equipment to help them address the evaporation and concentration challenges of high-COD and high-salinity wastewater.

Conqinphi's multi-effect evaporators offer low investment, high treatment efficiency, low operating costs, and stable and reliable system operation. They are widely used for evaporation, concentration, and crystallization of high-salinity industrial wastewater in the petrochemical, metallurgical, pharmaceutical, fine chemical, papermaking, printing and dyeing, food processing, jam and juice concentration, seawater desalination, electroplating, rubber additive, epoxy resin, lithium battery, and desulfurization industries.
 
Conqinphi serves thousands of clients, providing them with systematic industrial wastewater solutions and saving them from wastewater treatment challenges.