Mixed firing lime vertical kiln

Mixed firing lime vertical kiln

The mixed lime vertical kiln is an advanced lime production equipment that mixes and burns limestone with fuel to produce high-quality lime. This type of equipment has the advantages of high efficiency, environmental protection, and energy conservation, and has become the mainstream choice in the lime production industry. This article will provide a detailed introduction to the structure, working principle, performance parameters, and advantages of the mixed firing lime vertical kiln, in order to help readers better understand this equipment.

1、 The structure of a mixed firing lime vertical kiln

The mixed lime vertical kiln mainly consists of the following parts:

Kiln body: The kiln body is the main part of a lime vertical kiln, usually made of refractory materials to withstand the heat generated by high-temperature combustion. There are multiple combustion chambers and flues inside the kiln body, which are used to achieve mixed combustion of limestone and flow of flue gas. The design and construction of the kiln body have a significant impact on the quality and yield of lime.

Combustion system: The combustion system includes a burner and a fuel supply system. The burner is responsible for mixing fuel with limestone and spraying it into the kiln for combustion. The fuel supply system is responsible for providing sufficient fuel to meet the combustion needs inside the kiln. Ash discharge system: The ash discharge system includes an ash discharge port and an ash hopper, which are used to discharge the burnt lime from the kiln body. The ash discharge port is located at the bottom of the kiln body, and the ash hopper is used to collect and store the discharged lime.

Control system: The control system is used to monitor and control parameters such as temperature, pressure, and flow inside the kiln to ensure the stable combustion process inside the kiln. Through the control system, operators can real-time understand the operating status inside the kiln and make corresponding adjustments.

2、 The working principle of a mixed firing lime vertical kiln

The working principle of the mixed lime vertical kiln is as follows:

Mixing of limestone and fuel: Limestone and fuel are mixed in a burner to form a uniform mixture. Combustion process: The mixed materials enter the kiln and burn at high temperatures. The heat generated by the combustion of fuel heats limestone to its decomposition temperature, causing it to decompose into calcium oxide and carbon dioxide.

Lime generation: Limestone decomposes at high temperatures to produce calcium oxide, also known as lime. Ash discharge process: The burnt lime is discharged from the bottom of the kiln, collected and stored through the ash discharge system.

Smoke treatment: The smoke is purified and discharged to reduce environmental pollution.

3、 Performance parameter table of mixed firing lime vertical kiln

Parameter Name	Value	Unit	Remarks
Kiln body diameter	2-6	m	Choose the appropriate kiln body diameter based on production needs
Kiln body height	10-39	m	The height of the kiln body determines the production volume of lime
Design output	100-1000	t/d	Determine based on the size of the kiln body and production needs
thermal efficiency	60-70	%	High thermal efficiency means high energy utilization efficiency
Lime quality	CaO > 90	%	The quality of lime meets industrial standards
Fuel consumption rate	≤ 100	kg/t	Fuel consumption rate means energy conservation and environmental protection
Exhaust emissions	Complies with environmental standards	-	Reduce environmental pollution through purification treatment

4、Advantages and characteristics of mixed lime vertical kilns

Efficient and energy-saving: The mixed lime vertical kiln adopts advanced combustion technology and heat exchange system, which improves energy utilization efficiency and reduces production costs.

Environmental protection: By using flue gas purification technology, the emission of harmful gases is reduced, which meets environmental protection requirements.

Automation control: Equipped with advanced control systems, it realizes the automation control of the production process, improves production efficiency and product quality.

Flexibility: The size of the kiln body and combustion system can be adjusted according to different production needs to adapt to different scales of production.

Durability: Made of refractory materials, it has a long service life and can withstand long-term high-temperature combustion and combustion