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Heat recovery device for whitening and defogging exhaust gas from paper mill drying

The exhaust gas generated by paper mills during the production process has the characteristics of high temperature, high humidity, and foul odor. If directly discharged, it not only pollutes the environment but also wastes a large amount of heat energy. To solve this problem, our company has developed a whitening and defogging heat recovery device for drying waste gas in paper mills.

Heat recovery device for whitening and defogging exhaust gas from paper mill drying
動作原理：
Heat exchange principle: Using the principle of plate heat exchangers, heat is exchanged through a series of parallel metal plates. High temperature exhaust gas flows through one side of the plate, while fresh air flows through the other side, transferring heat through the plate wall to achieve waste heat recovery.
Cooling and heating process: Firstly, the high-temperature exhaust gas is cooled to a temperature close to the ambient temperature, and then heated by a reheater to make the exhaust gas temperature higher than the ambient temperature, thereby eliminating the phenomenon of white mist.
Technical advantages:
Efficient and energy-saving: By recovering waste heat from exhaust gas, energy consumption and operating costs are significantly reduced.
Environmental protection and emission reduction: effectively removing moisture and odorous components from exhaust gas, reducing pollution to the environment.
Compact structure: small size, light weight, easy installation, and occupies less space.
Application scenarios:
Paper industry: Recovering heat during the paper drying process to preheat the air entering the dryer, improve drying efficiency, and reduce fuel consumption.
Food processing industry: Recycling waste heat from the drying process of grains, vegetables, fruits, etc., to preheat fresh air and improve drying efficiency.
Chemical industry: Recycling high-temperature waste gas from the drying process of chemical products for heating other process gases or air.
Textile industry: used for the recovery of waste heat during the drying process of textiles, improving drying efficiency and energy-saving effects.

Heat pump drying heat recovery energy saving system

With the further development of China's economy, the use of green energy will be more and more extensive. Heat pump dehumidification dryers with plate type obvious heat recovery function have developed rapidly in recent years and have been widely used in the Yangtze River basin, southwest China and South China.

The unit using the inverse cano principle at the same time, combined with efficient heat recovery technology, in the whole drying dehumidifying process, through the duct the wet air within the chamber connected to the host using the sensible heat plate heat collector recovery of the sensible heat and latent heat of hot and humid air, thermal recycling, greatly improve the performance of the host, improve the drying speed and material quality. The waste heat can not only improve the performance of the unit, but also reduce the thermal pollution to the environment and alleviate the urban heat island effect.

The heat pump drying heat recovery system is not only used in the mud drying system, but also widely used in many other drying industries. It has the characteristics of good drying quality and high degree of automation, and is the best choice product for energy saving, green and environmental protection in the modern drying industry.

Heat pump dryers with and without heat recovery working principle

When the heat pump dryer dries the air, the air forms a closed cycle between the drying chamber and the equipment. The evaporator's heat absorption function is used to cool and dehumidify the hot and humid air, and the condenser's heat release function is used to heat the dry cold air, so as to achieve the effect of cycle dehumidification and drying.

The main difference between heat recovery function and heat pump dryers without heat recovery function lies in the different air circulation modes. The former is equipped with plate type sensible heat exchanger, which plays the function of pre-cooling and preheating in the air circulation process, reducing the load of compressor operation and achieving the purpose of energy saving.

Heat pump drying heat recovery energy saving system(图1)

Heat pump drying system operation mode

Heat pump drying heat recovery energy saving system(图2)

Energy saving analysis of heat recovery

Taking a heat pump dryer as an example, the air temperature of drying is designed to be 65℃, the relative humidity is 30%, the circulating air temperature is 65℃, the temperature before passing through the evaporator is 65℃, and the temperature after evaporation cooling is 35℃. The condenser needs to heat the air of 35℃ to 65℃ before it can be used.

After matching with BXB500-400-3.5 heat exchanger, 35℃ return air absorbs heat from exhaust air after passing through plate heat exchanger, and the temperature rises to 46.6℃. The condenser only needs to heat the air from 46.6℃ to 65℃ to meet the use requirements, greatly reducing the load of evaporator and condenser, thus reducing the power of the whole machine, achieving the purpose of energy saving.

Energy saving analysis of heat recovery

Heat pump drying heat recovery energy saving system(图3)

Selection and economic calculation

We are very glad to show you the calculation and selection software of plate heat exchanger jointly developed by us and Tsinghua University. If you need, please contact us!

A rapid method for eliminating white smoke

白煙を素早く除去する方法

The principle of using a condenser for dehumidification to eliminate white smoke is mainly based on the physical changes of water vapor in the flue gas. The condenser cools the flue gas with low-temperature water or air, gradually reducing its temperature, and the water vapor inside begins to condense into small water droplets. These small water droplets gather inside the condenser and eventually form liquid water, which is then removed through drainage pipes. Dehumidification through a condenser is an effective technical means to eliminate white smoke. It can not only reduce visual pollution, but also help improve the operational efficiency and energy-saving effect of environmental protection equipment. We can provide you with a suitable dehumidification solution for flue gas, which is both economical and environmentally friendly. Welcome to consult us via email.

Efficient equipment for removing industrial flue gas

産業排ガスを除去するための効率的な装置

熱交換技術を用いた産業用排ガス脱硫装置は、排ガス中の水蒸気含有量を低減し、煙突からの排出時に発生する白煙を除去します。排ガスの白化には、主に以下のような方法があります。

排ガス加熱技術：脱硫された湿潤排ガスを熱交換器を通して工業用高温排ガスと熱交換させることで、排ガスの排出温度を上昇させ、排ガスの相対湿度を低下させ、水蒸気の凝縮による白煙の発生を防止します。この方法は白煙の発生を効果的に低減できますが、煙を加熱するためにある程度のエネルギーを必要とします。

排ガス凝縮技術：まず飽和排ガス中の水蒸気を部分的に凝縮し、その後排ガスを加熱します。この方法は、排ガス中の水分含有量を低減することで白煙の発生を抑制するとともに、水資源の一部を回収します。

MGGH技術：電気集塵機の前後に排ガス冷却熱交換器を設置し、脱硫装置後に排ガス加熱熱交換器を設置し、熱媒水循環システムを構築する。この技術は、元の煙から熱を抽出し、清浄な煙を加熱する。通常、白煙の発生を防ぐため、清浄な煙の温度は75～80℃に上昇させる必要がある。

まとめると、これらの方法はそれぞれ長所と短所があり、異なる産業環境やニーズに適しています。特定の排ガス脱硫技術を選択する際には、プロセス条件、廃熱源、投資要件などの要素を考慮する必要があります。メールでのご相談をお待ちしております。

スモークスクラバー：物理的な方法で白煙を効率的に除去

The smoke scrubber condenses water vapor in the flue gas into liquid through a condenser, and gas pollutants adhere to the condensed liquid before being discharged through exhaust gas. This technology does not require a collector, but relies on the precipitated liquid to carry away pollutants, thereby reducing operating costs and minimizing the environmental pollution caused by white smoke.

The white smoke removal equipment produced by our company has a compact design layout, flexible installation, and easy operation, which can efficiently and quickly solve the white smoke generated in industrial production. Mainly used for desulfurization and whitening of flue gas from coal-fired boilers, gas-fired boilers, power plants, metallurgy and other industries.

Energy saving devices for heat dissipation in computer rooms

The heat exchange core of the computer room's heat dissipation energy-saving device is an efficient heat dissipation solution specifically designed for data centers or server rooms. By optimizing heat exchange efficiency, energy consumption can be reduced and system performance can be improved. The heat exchanger produced by our company uses hydrophilic aluminum foil as the heat exchange material, and the surface has been specially treated to have excellent hydrophilicity, which can promote the rapid formation and removal of condensed water. During the heat exchange process, the hydrophilic layer can effectively increase the heat exchange area and improve the heat exchange efficiency. Adopting a multi-layer microchannel design increases the contact area between the fluid and the metal wall, thereby improving the heat transfer efficiency. Greatly improved the energy efficiency ratio of data centers and reduced operating costs.

Comparison of PUE for Data Center Cooling Technologies

データセンター冷却技術のPUEの比較

PUE (Power Usage Effectiveness) is an important indicator for measuring energy efficiency in data centers. Ideally, the closer the PUE value is to 1, the higher the energy utilization efficiency. The following are typical PUE value ranges for various cooling technologies:

冷却技术	典型PUE值	适用场景

传统风冷

1.7 - 2.5

中小型数据中心、气候炎热地区

热/冷通道隔离

1.3 - 1.6

大型数据中心

间接蒸发冷却

1.1 - 1.3

干燥地区、节能要求高的数据中心

冷冻水系统

1.2 - 1.5

高密度负载

浸没式液冷

1.05 - 1.2

高性能计算（HPC）、超高热密度场景

自由冷却

1.1 - 1.3

寒冷地区

热回收冷却

1.2 - 1.4

热能循环利用需求高的数据中心

AI智能温控

1.1 - 1.2

超大规模数据中心

乾燥・除湿・熱回収システムの設計

製造業の急速な発展に伴い、多くの製品は製造工程において乾燥・除湿処理を必要としています。これらの工程では、効率的な水分除去だけでなく、素材の特性と品質を維持することが求められます。従来の乾燥・除湿方法は、多くの場合、多くのエネルギーを消費し、温室効果ガスやその他の汚染物質の排出など、環境に悪影響を及ぼす可能性があります。

効率的な熱回収技術を採用することで、廃熱を最大限に回収・再利用し、エネルギー消費を削減できます。熱回収技術は、エネルギー効率の向上と運用コストの削減を目的として、様々な業界で広く活用されています。しかし、乾燥・除湿分野では、この技術の潜在能力が十分に活用されていません。当社は、お客様の特定の生産ニーズと現場の状況に合わせて、熱回収システムをカスタマイズ・開発いたします。変換・伝送時の熱エネルギー損失を最小限に抑えるよう、システムレイアウトを綿密に設計いたします。メールでのお問い合わせをお待ちしております。

Heat recovery technology for air conditioning systems in shopping malls

ショッピングモールの空調システム向け熱回収技術

In today's pursuit of high-quality shopping experience, we not only focus on the richness and diversity of products, but also care about the comfort and sustainability of the shopping environment.
The core of our company's air conditioning system heat recovery technology lies in the perfect combination of high-efficiency heat exchanger design and intelligent control system. It can efficiently collect the waste heat generated during the operation of air conditioning and convert it into valuable energy for winter heating, domestic hot water, and even pre cooling fresh air in shopping malls.
This process does not require additional energy consumption and can achieve internal energy recycling, significantly reducing the overall energy consumption cost of the mall. And it can automatically adjust the operating status and heat recovery intensity of the air conditioner. This means that whether it's scorching summer or cold winter, the mall can ensure constant temperature and humidity, providing customers with the most comfortable shopping environment while achieving the best energy-saving effect. Welcome to consult via email.

Energy saving scheme for heat recovery of central air conditioning system

中央空調システムの熱回収のための省エネ計画

セントラル空調システムの運用において、省エネ改修計画には高効率熱交換器を採用することができ、熱伝達効率が高く流体抵抗が低いプレート熱交換器やマイクロチャネル熱交換器を選択することができます。当社の熱交換器は伝熱面積が広く、伝熱性能がより効率的であるため、同じ伝熱条件下でのエネルギー消費を削減できます。セントラル空調システムに廃熱回収装置を設置し、排出された熱を回収して再利用します。また、ヒートポンプ技術と組み合わせることもできます。ヒートポンプ技術は、少量の電気または燃料エネルギーを消費して低温熱源から高温熱源に熱を移動させることにより、熱エネルギーを効率的に移動する方法であり、セントラル空調システムにヒートポンプ技術を適用することで、システムの成績係数（COP）を向上させ、エネルギー消費を削減できます。

工業用浄化熱回収

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