RU2660163C1 - Method for snow melting - Google Patents

Abstract

FIELD: municipal engineering.

SUBSTANCE: invention relates to the field of municipal services and can be used to remove snow from streets. Said method for melting snow involves loading snow into melting vessel 1, draining defrost water into accumulator 4, and re-feeding its part under pressure to melting chamber 1. During the loading of snow, dry calcium chloride in the amount of 3–5 % of the snow is added. Wherein a 10–40 % solution of calcium chloride is placed in accumulator 4, a solution of calcium chloride in the defrost water is collected into same accumulator 4. Solution for re-feeding into melting vessel 1 is taken from the lower part of accumulator 4, and the solution from its upper part is drained to the sewage.

EFFECT: invention provides reduced energy costs for melting snow and reducing environmental pollution.

1 cl, 1 dwg

Description

The present invention relates to the field of public utilities and may find application in cleaning territories from snow.

The essence of the problem lies in the fact that when cleaning the streets and territories of industrial enterprises, a significant amount of snow is collected, while there are no areas for its storage.

The most common way to reduce the volume of accumulated snow is to transfer it to a liquid state and to discharge the resulting water into the sewer.

There is a method of converting snow into a liquid state, according to which snow is placed in a snow melting tank, where snow is melted using microwave lamps as a heat source (Snow melter, RF Pat. No. 2,407,854, 12/27/2011. IPC E01H 5/10).

The disadvantage of this method is the need to provide a significant reserve of electrical capacities precisely in the winter, when they are not enough.

A known method of melting snow, including placing it in a melting capacity of a snow melter and supplying it with hot water under pressure, heated in a special heat exchanger using water taken from a snow melter (Method of melting snow, US Pat. RF No. 2337207, 10.27.2008, IPC E01H 5/10). This method is adopted as a prototype.

The disadvantage of this method is the high cost of energy for heating water in heat exchangers, as well as the limited possibility of use in the city due to environmental pollution by combustion products formed during operation of the heater.

The aim of the invention is to reduce energy costs for melting snow and reducing environmental pollution.

This goal is achieved by the fact that in accordance with the known method of melting snow, including loading it into the melting tank, removing melt water into the storage ring and re-supplying part of it under pressure to the melting chamber, according to the invention, a dry chemical reagent is added to the snow, 3 -5% of the mass of snow, while a 10-40% solution of the same reagent is placed in the accumulator, a solution of melt water and a chemical reagent is collected in the same accumulator, moreover, the solution is taken for re-feeding into the melting tank DYT from the bottom of the drive, and the solution of an upper portion thereof is removed to the drain.

A new technical result from the application of the proposed method is that adding dry chemical reagent to the snow mass and supplying part of a solution of melt water and a chemical reagent through monitors eliminates the use of heating the solution supplied to the melting tank, and thus reduce energy costs and reduce environmental pollution by combustion products of the heater.

The essence of the proposal is illustrated in the drawing, which shows the installation for implementing the proposed method, comprising a melting tank 1 with a trellis pan 2 and a discharge pipe 3 connected to the storage tank 4. In the upper part of the tank 1 mounted monitors 5 and a container 6 with a dry chemical reagent. A pump 7 is installed on the storage tank 4, the suction pipe 8 of which is lowered to the bottom of the tank 4, and the pressure pipe 9 is connected to the hydraulic monitors 5. A pipe 10 connected to the sewer is connected to the upper part of the tank 4.

Consider an example of the implementation of the proposed method: snow is loaded into container 1, at the same time it is poured with a dry chemical reagent, for example, calcium chloride (3-5% by weight of snow). A concentrated solution of the same chemical reagent (10-40%) is poured from the container 6 into the lower part of the container 4. The concentration of the reagent depends on the ambient temperature - the lower the temperature, the higher the concentration. After that, the pump 7 is turned on, the reagent liquid concentrate is taken through the suction pipe 8 and fed through the pressure pipe 9 to the monitors 5 under a pressure of 5-10 bar. The solution, coming through monitors 5, has a mechanical effect on the snow mass, ensuring its crushing and mixing with a dry reagent. At the same time, it increases the intensity of melting snow. The resulting solution of melt water with the regent flows through the pan 2 and pipe 3 into the tank 4. The constant circulation of the solution provides compaction and melting of the snow, reducing its level in the tank 1. As the level decreases, the tank 1 is filled with snow with the addition of a reagent. In the process of melting snow, melt water overflows the tank 4, and its excess flows through the pipe 10 into the sewer. In the lower part of the tank 1, a denser concentrated part of the solution accumulates. This solution is taken by the pump 7 through the pipe 8 and fed through the pipe 9 to the monitors 5. During the melting of snow, garbage collects on the pallet 2, and sand accumulates in the lower part of the tank 1, therefore, after the installation is completed, the pallet 2 is cleaned of large debris that has arrived together with snow, and from the bottom of the tank 1 remove the sand deposited there.

Thus, the use of the proposed method provides melting of snow with a decrease in energy costs and a decrease in environmental pollution by combustion products.

Claims (1)

A method of melting snow, including loading it into a melting tank, removing melt water into a storage ring and re-supplying part of it under pressure to a melting chamber, characterized in that dry calcium chloride 3-5% by weight of snow is added to the snow during loading, a 10-40% solution of calcium chloride is placed in the accumulator, a solution of calcium chloride in melt water is collected in the same accumulator, moreover, the solution for re-feeding into the melting tank is taken from the lower part of the accumulator, and the solution is removed from its upper part down the drain.

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