How to use a hot blast stove to ensure the drying efficiency of grain?

The hot blast stove is mainly to provide a heat source for the grain drying tower, and use the hot air to dry the material, if the hot air temperature is too low, it will affect the drying efficiency, and if the hot air temperature is too high, it will cause paste, if you want to ensure the drying efficiency and effect of the grain drying tower, you have to control the temperature of the hot air. In order to help grain drying tower users improve the efficiency of the equipment, if the grain drying tower hot blast stove is operated correctly, it can not only increase the utilization rate of providing heat, but also save energy and reduce costs. What preparations should be made before operating the hot blast stove of the grain drying tower.

1. At the same time of charging, the heating hot blast stove should be ignited and preheated: firstly, adjust the induced draft fan to ignite the ignition, fill in the wood, and manually add coal to make the coal seam gradually burn vigorously; Then according to the combustion situation, the coal fire is gradually transferred to the front arch of the hot blast furnace, so that the front arch is heated until the coal burning from the coal gate into the furnace can be burned automatically. This process generally takes about two hours, and the flue gas temperature should be observed at any time to ensure that the hot blast furnace and heat exchanger do not heat up sharply, and a large amount of accumulated temperature is not generated in the heat exchanger.

In the case that the main heating fan is not started and there is no forced air flowing through the heat exchanger, the flue gas temperature of the hot blast furnace shall not exceed 300 degrees Celsius;

2. If the hot blast furnace is newly built or overhauled, the drying operation can only be carried out after the oven operation must be completed in advance;

3. After the hot blast stove completes the heating preparation, it can supply heat to the grain drying tower, and turn on the air cooler and hot air fan in turn according to the operating procedures. When using PLC automatic control system control, it is necessary to pay attention to the starting sequence and interval of the grain drying tower, and when using manual control, it is necessary to pay attention to the starting interval between the fans and equipment; Before starting the fan, the inlet damper of the fan must be closed, and it can only be opened after normal operation; The damper should be appropriately adjusted according to different wind temperature and flow requirements;

4. Pay attention to the order and degree of opening the hot blast fan in the process of drying the hot blast fan of the hot blast furnace. For the initial drying and heating or re-heating after a long period of shutdown, after all the fans that should be started are started, first open the air door of the induced draft fan of the hot blast stove; After the flue gas temperature of the hot blast furnace reaches 300, the hot air blower of the grain drying tower is gradually opened, and then the flow rate of the hot air is gradually increased according to the hot air temperature. In this process, it is necessary to ensure that the hot blast temperature is always not lower than 100, so as to prevent and reduce the phenomenon of fouling or local blockage of the hot blast furnace heat exchanger during the start-up process;

5. After the heating tends to be normal, check the operation of the fan one by one, observe it in a timely manner, record the temperature changes of the hot blast furnace, hot air, and the grain layer in the tower, and the current changes of each main control point, and analyze and grasp the drying status of the grain in the tower at any time;

How to use a hot blast stove to ensure the effect of food articles? First of all, the environment must be important, and it is necessary to circulate ventilation and have a good ventilation environment in order to effectively ensure the drying effect of grain.

The purpose of drying is to remove the moisture in the grain, the temperature is too high and it is easy to burst the waist, and the efficiency is too low to achieve, and the moisture content of the drying crops is also different (the moisture content of the crops grown in different regions is also different). Compared with rice, the moisture content of crops is relatively high. Under normal circumstances, it is safer to control the temperature at about 60.

The drying equipment is automatically adjusted, and the baking is generally adjusted to about 38 degrees by using the flue-cured tobacco room. The maximum temperature of baking does not exceed 70 degrees. Using the hot air temperature of 38 40, in order to ensure the quality of rice after drying and reduce the burst rate, a lower hot air temperature must be used, and the increase in the burst waist rate is less than 2%, and the burst waist in the rice drying process is not only related to the hot air temperature, but also related to the hot rheumatism content and the initial moisture of rice.

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The setting of the temperature of the corn dryer mainly depends on the moisture, usually you can buy a grain moisture analyzer online, first measure the moisture before the corn is dried, if the moisture is more than 30%, then the temperature needs to be set higher, usually between 300 and 350 °, if the moisture is less than 30%, then the temperature should be set at 300 degrees. This is only a reference value, the specific temperature setting is related to many factors, such as the speed of the equipment, the amount of feeding, etc., usually the temperature setting is debugged by the manufacturer's technical personnel. When the customer receives the purchased equipment, the manufacturer will send technical personnel to the site to guide the installation, and after the installation, it will be debugged, and the speed, temperature and feeding amount of the equipment will be adjusted to the best level, and then the workers will be trained to operate the method.

The temperature setting of the corn dryer should follow the principle of low and not high, the temperature is too high and will cause the corn to burst or break, if it is too low, it may not be dry, but it can also be re-dried, and it will not cause any damage to the corn.

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The temperature in the grain drying equipment is set according to the type of machine and the temperature set at the time of drying. Sanjiu low-temperature circulating dryer has a temperature rise range of about 60°.

The temperature of the grain dryer is not more than 60 °, if the temperature is too high, the grain will burn, affecting the quality of the grain.

Grain dryers now have mobile grain dryers, tower grain dryers, etc.

1. Pay attention to the overall heat preservation. The main use of heat energy in the drying work of the equipment is to make the full use of the thermal energy of the drying equipment become a very important hole. Therefore, grain dryer manufacturers remind users to pay special attention to thermal insulation, but there can be no heat loss in any link.

2. The use of frequency converter. The accessory fan is an important supporting equipment of the dryer, and its basic operation is continuous, and its loss is very large. Here we need to use the inverter, after which we can manually control the operation of the fan.

In addition, a frequency converter can be added to the dust removal equipment. 3. Grain dryer manufacturers remind you to pay attention to the use of cooling water. The fans and pumps used in the dryer are large equipment, and the fans are basically running continuously, so the motors used are easy to heat, and here we need to use water for cooling.

However, today's environmental problems are becoming more and more serious, and water is also a scarce resource. At this point, we need to recycle the cooling water, which not only reduces the loss but also saves water. 4. Pay attention to the design of the hot air distributor.

If the heat energy wants to contact with the wet material, it must pass through the hot air distributor, how to design the hot air distributor is an important work, which directly affects whether the material can be dried to meet the requirements. 5. Consideration to be fully utilized has become a top priority. Normally, we use coal, diesel, natural gas and heating pipes to generate heat through specific equipment, which basically includes coal-fired furnaces, oil-fired burners, loose skin gas burners and electric heaters.

However, most of them can only be used in occasions where the requirements for materials are not strict, and heat exchange devices should be added to the use of strict occasions. Electric heaters are generally only used in laboratories and are a non-polluting device.

If the temperature control system detects that the temperature in the granary is too high, the grain may burst and scorch, affecting the quality, so the temperature should be controlled lower, and then the cold air should be implanted to reduce the temperature in the warehouse. The drying bin uses cold and hot air to work alternately, which is conducive to controlling the temperature in the warehouse.

Gongyi Ronghua energy-saving ceramic heat exchanger **** uses the characteristics of silicon carbide high temperature resistance, corrosion resistance and good thermal conductivity, and has developed a silicon carbide ceramic spiral coil hot blast furnace (invention patent number: , designed according to the special structure of the spiral coil, the ceramic coil is directly in contact with the heat source, the hot air walking distance is long, the smoke structure is adopted, the outer surface of the ceramic coil is all involved in heat exchange, and the high temperature hot air can reach up to 1250, without heat storage switching, which can solve the problem of flameless sintering and increase the exhaust gas heat ** device, Reduce exhaust gas temperature to maximize fuel utilization.

Silicon carbide ceramic spiral coil hot blast furnace and cooler, the main performance indicators greatly exceed the traditional metal hot blast stove, no pollution, no peculiar smell, green and environmentally friendly food-grade hot blast stove, saving energy, is the perfect replacement product of metal hot blast stove.

Silicon carbide ceramic spiral coil hot blast stove is available in a variety of specifications, aIndustrial Gas High Temperature Hot Blast Stove: Hot blast temperature standard 500 to 1200 °C, this hot blast stove can be used for drying, baking and solving flameless sintering.

b.Medium-temperature food-grade hot blast stove can be used for heating and drying, tea finishing and processing of agricultural and sideline products, etc.: it is also suitable for greenhouse vegetables, breeding, etc.

c.Civilian hot blast stoves can solve the problem of heating farmers in cold areas, and can use plant fuels, tree branches, chopping wood and coal, etc.

Equipment features: 1.Because it is a silicon carbide ceramic product, the heat source flame can directly contact the heat exchange tube, and the high-temperature flame is directly sprayed into the hot blast furnace, the heat energy utilization rate is ultra-high, and the energy-saving effect is much higher than that of the metal hot blast furnace.

2.In addition to electricity, a variety of fuels can be used, such as natural gas, liquefied gas, oil, generation gas, biomass pellets, yellow phosphorus gas, coal and firewood and other plant raw materials, and equipped with a variety of combustion technologies and automatic control systems to reduce or solve air pollution. Among them, the electric blast stove can completely achieve zero emission of high-temperature exhaust gas.

3.The silicon carbide ceramic spiral coil hot blast stove can be exchanged for about 300-1250 hot air, according to the heating or drying temperature, the high temperature hot air mixed with room temperature air 10-20 times, with a smaller hot blast stove to solve the huge hot blast furnace hot air volume, the user reduces the equipment investment, to achieve excellent results.

4.Because the silicon carbide ceramic hot blast stove is resistant to high temperature and corrosion, it is countless times longer than the life of the metal hot blast furnace.

1. The dryer needs to be installed indoors, so that the heat loss is relatively small and the drying cost is low.

2. At present, the heat source of the dryer is diesel, natural gas, steam, coarse bran, etc., and the most suitable heat source can be selected according to the place of use. The cost of natural gas is relatively low, the cost of coarse chaff is lower, and both are environmentally friendly.

3. Choose equipment with a high degree of automation, and if you need a furnace that needs to be fed manually, you need to add a labor cost.

The fuel in the equipment has no power flow, which is easy to operate and occupies a small area. The material passes through a diversified drying zone to achieve continuous, gentle and uniform damp heat exchange. With automatic control, the residence time of the material in the tower can be adjusted at will.

Through airflow control and product movement, the processed product can be dried evenly and thoroughly, and the tower dryer is best suited for slow, uniform drying. The drying quality is basically the same as that of natural drying, and the color and odor are normal after drying. The rice waist burst rate is low, which meets the national standard.

The oil yield of soybean and rapeseed and wheat gluten quality are not reduced. Processed products do not have dead corners, scorched grains, etc.

Henan is a large agricultural province, the planting area of grain crops is large, and the country attaches great importance to the harvest of grain crops every year, because it is related to the people's livelihood of the country, which brings huge development space and business opportunities for grain drying equipment.

1. The temperature difference between day and night is large, try to choose dry when the temperature is high during the day, and ventilate and dry when the temperature is low at night;

2. The dryer needs to be installed indoors to reduce energy loss, especially when drying late rice, it should be installed indoors to save a lot of energy;

3. Increase the Sanjiu cleaning machine to reduce the impurities of the grain, and make full use of the heat source for the dry grain;

4. Choose a dryer with high thermal efficiency, and the dried grains are at room temperature, indicating that the energy is fully utilized;

5. The rationality of the design of the drying workshop and the good ventilation should be good, so you can ask the professional dryer manufacturer for design consultation.

Dryer structure:

All-in-one machine: the drying host and drying room are made into a container integral, including the drying room with a drying car and a drying tray Advantages: 1. Convenient and fast movement and transportation.

2. No need to debug and install, it has been tested before leaving the factory, and it can be used directly when it is connected to the power, and it can be used as a demonstration prototype and can be operated immediately.

3. There is no need for construction personnel and costs, saving construction time.

4. Sturdy and durable, not afraid of wind, sun and rain, suitable for outdoor use, and even dry products in the field.

5. Good sealing and heat preservation, so that the noise is smaller, the heat loss is less, and it is more energy-saving.

No matter how the output of the mobile grain dryer changes, the dryer can be designed as a single unit, with a small footprint and few ancillary equipment; No increase in the number of operators; Produced in the open air, no canopy required. Therefore, the higher the output, the lower the total investment cost of the system compared to the recirculating dryer, and the more obvious the advantages of high efficiency.

Adopt hot air permeable design, have a wide drying area, through the constant temperature ventilation device, automatic and rapid temperature regulation, hot air indirect heating makes the grain free of any pollution, to ensure that each grain is evenly dried, the color and smell are good, and the drying effect is of outstanding quality.