RU2530069C2 - Homogeneous composition production line - Google Patents

Abstract

FIELD: process engineering.

SUBSTANCE: invention can be used in construction, rubber production and production of mineral sulphur-bearing fertilizers. Copolymer binder production line comprises intake bin 1, vortex layer apparatus ABC 2, smelting vessel 3, odorant-modifier vessel 4, compressor 5, semi-submersed pump 7, air duct 8, hatch 9 to remove impurities and exhaust pipe 8. This line has inclined 5 m long part 6a extending from exhaust pipe 6 to smelting vessel 3.

EFFECT: decreased emission of sulphur.

5 cl, 1 dwg

Description

The invention relates to the production of compositions that can be used in industrial civil engineering and road construction, in the rubber and other industries, modification of motor fuels and fuel oil, production of raw materials for the production of bitumen, sulfur degassing, production of sulfur-containing mineral fertilizers.

A known line for producing sulfur cement by the interaction of sulfur and an oil-based modifier at a temperature of 140-150 ° C. In the apparatus of the vortex layer, a homogeneous solution of sulfur and a modifier is affected by a rotating electromagnetic field for 2-5 s, with the following ratio of components, mass. % sulfur 90-98, modifier 2-10. As a modifier, a modified oil residue is used, for example fuel oil, pre-treated with a rotating electromagnetic field for 10-60 s at a temperature of 300-350 ° C [RF Patent No. 2154602, cl. C01B 17/00, 2000].

The disadvantage of this solution is the presence of hydrogen sulfide and mercaptans in the finished product.

The invention is known in which a technological line for the production of sulfur and other homogeneous compositions, including containers for the starting components, a mixing device equipped with dispensers and connecting pipelines for supplying the starting components to the processing position and discharge of the finished product. The connecting pipelines form a closed system with the modifier or other components and sulfur connected to it by dispensers, while the modifier or other components feed pipe is connected to their pre-treatment apparatus and connected through the mixing unit to the sulfur supply pipe, and the pipeline coming from the mixing unit is connected apparatus for the final mixing of the mixture, and the apparatus for pre-processing the modifier or other components and the final mixing of the mixture is made in the form of arats of the vortex layer with ferromagnetic elements. The length of the pipeline from the mixing unit to the apparatus for final mixing of the mixture is at least 3 m. The pipelines forming a closed system are made heated and equipped with loading devices for supplying the initial components. Dispensers are made in the form of semi-submersible plunger pumps. Loading and unloading devices are made in the form of heated containers. The apparatus for the final mixing of sulfur through an unloading device is connected to a granular one [RF Patent No. 2164487, class. C04B 28/36, 2001].

The disadvantage of this line is its high energy intensity, since it is necessary to install two devices of the vortex layer of the modifier or other components, the second for the final mixing of the mixture. In addition, the processed product has a specific odor of hydrogen sulfide and mercaptans due to the absence of a degassing unit. This reduces the quality of the finished product and complicates its use in the manufacture of mixtures based on data from homogeneous compositions.

Closest to the proposed invention is a production line for the production of homogeneous compositions, including tanks with sulfur, bitumen or a modifier, a swirl layer apparatus, dispensers and connecting pipelines for supplying the starting components to the processing position and discharge of the finished product, according to the invention, are equipped with a sulfur degassing device into which pipelines for supplying sulfur, modifier bitumen are introduced, the degassing device is made heated and communicated with the vortex layer apparatus having pipelines for the discharge of the finished product in the form of sulfur-bitumen and sulfur-polymer and other homogeneous compositions. The processing line is equipped with a means for supplying reagents to the degassing device. The processing line includes a hot air supply system for additional degassing of sulfur to the level of 0.003 pp. [Patent KZ No. 23154, cl. C04B 28/36, 2009].

The bottleneck of this invention is the high heat consumption for producing hot air supplied to sulfur degassing.

The objective of the invention is to improve the production line, ensuring the continuity of the process of obtaining sulfuric and other homogeneous compositions with desired properties and a uniform stable consistency.

The production line operates as follows: with a bucket forklift, sulfur is loaded from a warehouse through a receiving hopper (1) with a weighing batcher into a melting tank (3), where sulfur is melted and heated to T = 135-145 ° C, then a semi-submersible pump is turned on (7) ), which works along a bypass pipe cut into the opposite end of the tank, after starting the pump under the suction nozzle, the odorant modifier (based on vegetable oils) is dispensed from the tank (4), which dissolves well in sulfur, this process takes 10-15 min after preliminary mixing of sulfur with the same pump is sent for final processing to the ABC apparatus (2), where the result is a seropolymer binder (SPV) corresponding to TU. Contaminated and poorly degassed sulfur undergoes additional degassing when heated air is supplied up to 100 ° C. Air using a compressor (5) is supplied under the bottom of the sulfur melt through perforated pipes (12), while the oxygen of the air reacts with sulfur according to the formula H ₂ S + O ₂ = H ₂ O + S. Mechanical impurities after the sulfur melt settle on the bottom and are removed through the hatches (9). After removal, solids are used in the preparation of sulfur concrete. Capacity (3) is equipped with an exhaust pipe (6), as well as a roof fan (11). The exhaust pipe (6) is connected with the capacity of the inclined section (6a) with a given slope. After the sulfur melt in the tank and while maintaining it in a liquid state, the sulfur vapor is sucked into the pipe for dispersion in the atmosphere, however, the bulk of the sulfur vapor is up to 80% of the mass. condense in the cold section of the inclined pipe with a length of at least 5 m. The inclined pipe section (6a) is equipped with a heating cable. When the cable is turned on, sulfur melts and flows down a given slope back into the tank. Air intake to the compressor is made through pipes (10) laid in the upper gas-air part of the melting tank (3). In case of exceeding the MPC of workplaces by gaseous products of sulfur processing, the roof fan (11) automatically turns on the exhaust through the air duct (8) laid in the pit (see Figure 1).

In contrast to the prototype, where a container with an exhaust device is declared, an exhaust pipe with a centrifugal fan, which is installed in a pit with a sulfur melt tank, serves to extract hydrogen sulfide in the event of a hydrogen sulfide leak, and also removes sulfur vapor, emitting them into the atmosphere through a exhaust pipe with a length of 15 m

Offered:

- install a vertical pipe for hoods with a length of 15-20 m;

- install a roof fan on the pipe;

- connect the inclined pipe with a length of at least 5 m with a given slope the capacity of the sulfur melt with the main exhaust pipe.

The inclined pipeline should be periodically heated, since during the operation of the roof fan (11) the bulk of the sulfur vapor condenses on the cold inclined part of the pipe, as the sulfur condensate accumulates, heating is turned on, and the sulfur, being melted, flows down the given slope back into the melt capacity.

Thus, the problem of a sharp reduction in sulfur vapor emissions into the atmosphere by up to 80% is being solved.

Unlike the prototype, where a heater up to 100 kW is used to heat air ≥100 ° C, the present invention provides for heat recovery by laying air ducts in the gas-air space of the sulfur melt tank, this solution is possible, since the maximum sulfur loading height is 2/3 from the volume of the capacity for the melt. Atmospheric air passing through the air ducts is heated from the walls of the air ducts, which in turn are heated by the heat generated by molten liquid sulfur. The temperature above the surface of liquid sulfur is 10-15 ° C higher than that of sulfur itself. Thus, the task is solved to significantly reduce energy costs and to exclude from the circuit an energy heater with a capacity of 100 kW.

The testing of the production line was carried out at a pilot plant in the village of Aksaray, Astrakhan region in 2001-2002.

Claims (5)

1. A technological line for the production of a sulfur-polymer binder, including a receiving hopper, an ABC vortex layer apparatus, a melting tank, a tank for modifying odorant, a compressor, a semi-submersible pump, an air duct, a hatch for removing impurities, an exhaust pipe, characterized in that it is equipped with an inclined part from a chimney to a 5-meter-long sulfur melt tank 2. The production line according to claim 1, characterized in that the inclined pipeline is periodically heated. 3. The production line according to claim 1, characterized in that the system is equipped with a roof fan. 4. The production line according to claim 1, characterized in that it is equipped with a system of air ducts in the gas-air space of the melting tank. 5. The production line according to claim 1, characterized in that odorants based on vegetable oil are introduced into the line, which are also a sulfur modifier.