品質 粘土の煉瓦作成機械 & レンガトンネル炉 メーカー

Discussion on Pressure Regime in Brictec Tunnel Kiln Firing During tunnel kiln firing, the rationality of the pressure regime has a significant impact on firing results. The kiln pressure regime refers to the distribution pattern of static pressure along the length of the tunnel kiln. By plotting the pressure data of different car positions, a “pressure curve” is obtained. The pressure regime directly determines the flow state of gases inside the kiln, which in turn affects: 1. Heat exchange in the kiln; 2. The amount of combustion air required and the exhaust gas discharged; 3. The uniformity of pressure and temperature distribution inside the kiln.   I. Formation of the Pressure Regime The pressure distribution inside the kiln is the result of multiple gas flows acting together: 1. Cooling zone: A large amount of cold air enters, while heated air is extracted. 2. Firing zone: Fuel combustion generates gases, with the addition of primary air and atomized fuel. Pressure in this zone is usually higher than atmospheric pressure, forming positive pressure. 3. Preheating zone: A large amount of flue gas and water vapor is discharged by the exhaust fan. Kiln pressure is lower than atmospheric pressure, forming negative pressure. During the transition from positive pressure to negative pressure, there exists an interface where the internal kiln pressure equals the external atmospheric pressure. This is called the zero-pressure plane (or zero point/zero position). (1) Before the zero-pressure plane (preheating zone) → Negative pressure zone, beneficial for discharging flue gas and water vapor, but may cause cold air infiltration, leading to thermal stratification and increased temperature difference. (2) After the zero-pressure plane (firing zone) → Positive pressure zone, prevents cold air entry and maintains stable, uniform temperature. II. Control of the Zero-Pressure Position In practical operation, most tunnel kilns maintain the firing zone under slight positive pressure, and set the zero-pressure plane at: 1. The middle of the firing zone; 2. Or around 1/3 of the coal-feeding rows toward the insulation zone; 3. Or slightly behind this position. This allows high-temperature gases to evenly fill the entire brick stack, ensuring uniform heating and insulation of bricks at high temperatures. III. Key Points for Controlling Positive Pressure 1. Advantages of moderate positive pressure: Stable kiln atmosphere, uniform temperature, prevention of cold air entry. 2. Risks of excessive positive pressure: Significant hot gas leakage → increased heat loss; 3. If kiln car bottom sealing is insufficient → hot gases flow downward, possibly leading to: (1) Deformation and damage of kiln car skirts; (2) Wear of sand seal grooves; (3) Evaporation of bearing lubricating oil, causing bearing damage; (4) Deterioration of the working environment. Therefore, tunnel kiln operation should avoid excessive positive pressure and maintain only slight positive pressure.

Brictec、第9回バグダッド国際建設・建築博覧会（IRAQ BUILDEXPO）で成功裏に展示 最近、粘土レンガプラントのプロセス設計とEPC建設における世界的リーダーであるBrictecは、第9回バグダッド国際建設・建築博覧会（IRAQ BUILDEXPO）に成功裏に参加しました。 展示会では、Brictecは高水準のレンガプラントモデルを展示し、トンネルキルン設計、キルンカー耐火ソリューション、ターンキーレンガプラントプロジェクトにおける高度な能力を強調しました。ブースは業界の専門家や地元の請負業者から強い注目を集め、Brictecのエネルギー効率の高い、最新のレンガプラントソリューションに関する専門知識が高く評価されました。 このイベントは、Brictecがイラク市場からより広い中東地域へと拡大するための重要な一歩となりました。地元の顧客との深い交流を通じて、Brictecは効率的で持続可能でインテリジェントなレンガプラントソリューションを提供し続け、イラクおよび中東における建設資材産業の質の高い発展に貢献します。展示会は大成功を収めました。Brictecは、イラクの人々に平和、繁栄、幸福を心から願っています。 展示会の概要イラクビルドエキスポについて：イラクビルドエキスポは、建設、建材、インフラ、不動産開発部門に特化した、この国を代表する国際展示会です。今回で9回目となるこのイベントは、2025年9月8日から11日まで、バグダッド国際見本市会場で開催されます。 イラクが大規模な再建と近代化を続けている中、イラクビルドエキスポは、地元の企業や国際的な企業が、意思決定者、バイヤー、投資家、プロジェクトリーダーといった非常にターゲットを絞った聴衆に、自社の製品、サービス、技術を披露するための重要なプラットフォームを提供します。 イラク、中東、ヨーロッパ、アジアから300社以上の出展者と数千人の専門家が参加し、このエキスポは、ネットワークを構築し、パートナーシップを築き、イラクの建設環境の未来に貢献するための比類のない機会を提供します。 主な特徴：1. 建設のすべての分野を網羅する広範な展示エリア2. 高レベルのB2Bマッチメイキングプログラム3. ライブデモンストレーションと技術プレゼンテーション4. 政府機関と民間開発者の参加 謝辞：この展示会を主催してくれたイラクピラミッドグループA.S.に感謝申し上げます。 編集者：JF & Lou

Brictec Successfully Completes Thermal Shock Resistance Test for Refractory Bricks, Demonstrating Expertise in Brick Plant Construction With 15 years of experience in complete plant process design and project construction for clay-fired brick production, Brictec has recently completed thermal shock resistance tests for tunnel kiln refractory bricks and kiln car refractory bricks. These tests not only verified the performance of refractory materials under extreme temperature variations but also demonstrated Brictec's professional approach to material selection and quality control in brick plant construction. Importance of Thermal Stability Testing In clay brick production, tunnel kiln refractory bricks and kiln car refractory bricks are directly exposed to high-temperature impacts and frequent thermal cycling. Tunnel kiln bricks must withstand continuous operating temperatures above 1000°C, while kiln car bricks endure severe thermal shocks during the loading/unloading of red brick green bodies. Inadequate thermal stability can lead to cracking and spalling, significantly affecting kiln service life and production safety. Brictec's Rigorous Testing Protocol To ensure refractory bricks meet operational requirements, Brictec has established strict "Refractory Brick Thermal Shock Resistance Testing Standards": Sample Preparation: Specimens cut from production batches according to GB/T 3997.1 Equipment: Program-controlled electric furnace with water quenching system Procedure: Heat specimens to 1100°C for 30 minutes Rapidly quench in 20°C water Repeat cycles until failure occurs Evaluation: Strength retention rate after 20 cycles (≥80% qualified) Quality Assurance for Construction Projects During testing, Brictec utilized temperature monitoring systems integrated with (clay brick making machines) for accurate data collection. Our engineering team paid special attention to refractory performance in actual (red brick making machine) production lines, using test results to select optimal materials for ongoing projects. Key Term Glossary: Clay brick making machine: Core equipment for forming and firing clay bricks Red brick making machine: Automated equipment specialized in standard red brick production Thermal shock resistance: Material's ability to withstand rapid temperature changes without damage Should there be any technical inaccuracies or editorial errors, we welcome corrections and feedback.