First, the initial investment is small: due to the adoption of a number of patented technologies, the use of this steel plate library can not only save about 50% of building materials, but also save more than 60% of land. Ton warehouse investment is below 200 yuan, which is less than 50% of concrete warehouse. The operation is convenient, and the delivery rate reaches 95%.
Second, it has good comprehensive performance, environmental protection, energy saving and land saving, and long service life, which can be used for 50 years.
Third, advanced technology, high emptying rate, good homogenization effect and convenient maintenance and replacement of equipment in the warehouse.
Four. Structural shape and size
Advanced design: It has more than 20 patented scientific design concepts in shape and internal structure, and has a unique structure: the warehouse body is cylindrical, the top and bottom of the warehouse are spherical, and the foundation is a frustum bucket. The diameter of the silo can be designed to be 6-80m, and it can be increased if necessary. The aspect ratio is generally between 1: 1. 1 and 1: 1.5. According to the requirements of the site and factory, warehouses (warehouses) or warehouses (warehouses) can be built in one row, product type, device type, single row type or multi-row type. The bin body is cylindrical, and the top of the bin is round and spherical. The wall of the warehouse is made of butt welded steel plates; The dome of hemispherical dome is a unique architectural structure formed by the structural design of section steel and the combination of multiple arched beams. Its reasonable architectural structure makes its dome have reliable bearing capacity. The shape of the reservoir bottom is concave, and the design parameters are different under different climatic conditions and geological structures by using the wedge pressurization principle.
Verb (abbreviation of verb) Storage capacity and bulk density of materials: the capacity of a single warehouse is 6,543,800 tons.
The storage capacity of a single cement can be 0.5-65438+ 10,000 tons, and at the same time, a cement storage group with a total storage capacity of several hundred thousand tons can be formed. Cement reserves are related to cement bulk density. The bulk density of the cement with large air content which is put into the silo through the chute is relatively small, generally around 1.2, and it can reach 1.4- 1.5 after a period of time, and 1.6 after a long time. Under normal circumstances, the storage bulk density of cement is calculated as 1.35.
6. Material storage: mechanical or pneumatic.
According to the different conditions of each factory, the material storage mode can be elevator storage, chute storage or pneumatic conveying pipeline storage. Bridges can be erected between the top of the silo and between the top of the silo and the frame of the hoist, so as to install the incoming material conveying equipment.
Seven. Transportation mode and flow rate: the gas discharge time can reach 500 tons.
The traditional silo discharging method generally adopts self-discharging, but with the long-term storage of cement, if there is no external force to promote it, the discharging rate is quite low, generally less than 70%. Because of the special gasification unloading device combining gas fluidization and pneumatic pipeline, the cement in the large steel silo is fluidized first, and stratified flow unloading occurs at the slope near the self-flow angle of the material at the bottom of the silo, so even if the area of the silo bottom is large, the emptying rate can be guaranteed to be above 95%. When discharging, the cement is sent out of the warehouse by the conveying pipeline, and then sent to the packaging bin or bulk cement tank by lifting equipment or pneumatic conveying equipment. According to the customer's requirements for transportation flow, the transportation capacity of a single pipeline can reach 500T/H, and the combination of double pipes and multiple pipes can be used for larger flow to meet the customer's requirements.
8. Low gas consumption: Because the design concept of gas fluidization, gas homogenization and gas transportation integration is adopted in the warehouse, that is, the principle of multi-purpose in one gas can save a lot of gas sources. Considering the long storage period of cement and the increase of bulk density, high-pressure air is used as the gas source. The comprehensive power consumption for gas homogenization, unloading and transportation of tons of cement is about 0.3 degrees. If the cement is stored for too long, the power consumption will increase relatively.
Nine, the quality effect of cement preservation: stored for 2 years without deterioration.
With the extension of storage period, the bulk density of cement increases. Cement is basically vacuum sealed in the airtight isolation of the large steel plate silo wall. This kind of sealing effect is much better than brick, stone and concrete structure, and the cement sealed in bags is incomparable. Practice has proved that the compressive strength of cement stored in large steel plate warehouse for more than two years is basically unchanged, except that the setting time is slightly prolonged and the flexural strength is slightly reduced, and there is no caking phenomenon.
Ten, environmental protection standards: a dust collector can achieve dust-free emissions.
The warehouse roof is a load-bearing dome, and each warehouse roof is provided with a bellows pulse dust collector, which mainly collects the dust generated when materials are put into storage. Reduce the dust concentration to below 30mg/m3. If the traditional library is used, the number of dust collectors will increase and the investment in environmental protection will increase. For example, a large steel plate warehouse with 20,000 tons of cement has only one entrance, and one dust catcher can ensure dust-free discharge, while 20 circular warehouses with a thousand tons of traditional structure need 20 dust catchers, each of which needs 20 dust catchers, and it is very difficult to control environmental protection only by multiple entrances.
XI。 Process layout: flexible and free
According to the location of the site, it can be arranged in a straight line, triangle, double row or multiple rows, and the direction of the discharge corridor can be flexibly determined according to the site conditions. Because the pneumatic pipe is used for discharging, the position of the exit elevator can be freely selected. 、
Twelve. A wide range of storage uses: various.
Our company has developed clinker and fly ash silos while promoting the application of large cement storage steel silos, which not only reduces investment, eliminates environmental pollution, but also saves a lot of construction land. At the same time, special warehouses for pulverized coal, aluminum powder, grain, flour and petroleum products have been developed.
Thirteen. The construction period is short: about 2-5 months.
According to geological conditions, construction site and construction environment, the construction period is generally 2-5 months. If it is a group of reservoirs, it can be constructed alternately or simultaneously to shorten the construction period.
Fourteen Long service life: 50 years.
According to the specification, anticorrosion maintenance can ensure a reliable service life of 50 years, and there is no obvious external corrosion. Combined with enterprise benefits, it is a tangible asset that benefits from long-term investment.
15. Low maintenance cost: there is almost no maintenance cost for the discharging equipment in the warehouse.
The gasification, unloading and conveying equipment in the warehouse has no rotating parts and is basically maintenance-free. Even if the 20,000-ton cement silo is maintained once every three years and only painted with external antirust paint, the annual maintenance cost is only about 3,000 yuan.
In a word, the steel silo itself is characterized by large capacity, light weight, short construction period, small floor space and good airtightness.
Good performance, wide adaptability, moisture-proof, fire-proof, easy to realize mechanized production and automatic control. Therefore, it is increasingly favored by storage owners of powdery granular materials and liquid materials.
16. Image benefits of large steel plate warehouse: The adoption of big warehouse not only brings tangible economic benefits, but also overcomes the visual defects brought by small warehouses. The spectacular image of large steel plate warehouse will increase the sensory benefits of enterprises. Bulk storage capacity of large steel plate depots is an effective measure to ensure continuous production of cement in off-season and solve problems for cement production enterprises. Because its reserves meet the batch requirements of large and small capacity. Especially in the "Three North" area, due to the economic losses caused by the shortage in peak season, the investment benefits of enterprises cannot be fully exerted. By adopting a large steel plate warehouse, enterprises can completely avoid the loss of shutdown in the off-season and get due benefits through the best-selling in the peak season.