CN114850032A - A kind of mist dry separation method and system - Google Patents

Abstract

The invention relates to a mist dry separation method and system, which mainly includes a raw material preparation unit, a mist preparation unit, a pressure unit, a dry separation unit, a circulating purification unit, a product unit, etc., and the mist dry separation is realized by replacing the air medium with a mist medium. , from the root cause of the dry dust generated in the existing dry separator is reduced, the problem of micro dust treatment in the existing technology is changed, and the explosion hidden danger of micro dust is eliminated, and the system is simple, stable and reliable in operation. The mist dry separation method and system with high performance, low separation cost and environmental protection are a brand-new economical and efficient mist dry separation method and system in the separation industry, especially suitable for use in high gas mines. And the dry gangue discharge system for lump coal is simpler.

Description

A kind of mist dry separation method and system

Technical field

The invention relates to a dry separation method and system, in particular to a mist dry separation method and system suitable for coal, ore and other materials.

Background technique

At present, the dry sorting equipment that uses air as the medium in the industry mainly includes air jig sorting machine, composite dry sorting machine and so on. The air jig separator feeds a pulsating air flow at the lower part of the air distribution plate to form a variable-speed medium flow. The classified materials are periodically dispersed and settled in the variable-speed medium flow, and the density is the dominant factor within a certain period of time. Layered to achieve sorting. In the composite dry sorter, particles of different densities are subjected to the combined action of wind force, excitation force, gravity and bed surface friction. According to the theory of potential energy decreasing, the separation is realized according to the density as the dominant factor. In the above methods, the air medium flow is the main power source. During the work, the air flow brings the micro-particles in the material into the air flow, and a large amount of dust is generated. Therefore, there are the following problems that are difficult to break through: First, the treatment of micro-dust It is difficult, expensive, and prone to environmental pollution. Second, there is a danger of explosion of fine dust, and it cannot be used in environments with explosion-proof requirements, such as underground coal mines, especially in high gas mines.

SUMMARY OF THE INVENTION

The object of the present invention is to overcome the deficiencies in the prior art, realize the mist dry selection by replacing the air medium with the mist medium, reduce the dry dust produced in large quantities in the existing dry separator from the root, thereby changing the micro-dust treatment Problems, and eliminate the explosion hidden danger of fine dust, to achieve a simple system, stable operation, high reliability, low separation cost, environmental protection mist dry separation method and system.

The technical scheme of the present invention is summarized as follows:

A mist dry sorting method, including the existing dry sorting method using air as a medium, wherein the dry sorting is realized by replacing the air medium with a mist medium, and the dry dust produced in a large amount in the existing dry sorting machine is reduced.

In the mist dry separation method of the present invention, the mist medium is dry mist.

In the mist dry separation method of the present invention, the mist medium is wet mist.

In the mist dry separation method of the present invention, the mist medium is supersaturated water mist.

In the mist dry separation method of the present invention, the mist medium is a mist produced by mixing two or more media.

In the mist dry separation method of the present invention, the mist medium is a water foam mist generated by the action of water and a foaming agent.

A mist dry separation system mainly includes a raw material preparation unit, a mist preparation unit, an air compression unit, a dry separation unit, a circulating purification unit, a product unit, and the like. The raw material preparation unit sends the prepared material to be sorted into the dry separation unit, the mist preparation unit sends the prepared mist into the air compression unit, and the air compression unit sends the mixed mist into the dry separation unit, the The products sorted by the dry separation unit enter the product unit, the exhaust gas generated by the dry separation unit enters the circulation purification unit, the air purified by the circulation purification unit enters the air compression unit, and the microparticles separated by the circulation purification unit enter the product unit. .

In the mist dry separation system of the present invention, the mist preparation unit and the gas compression unit can be combined into one unit.

Compared with the prior art, the present invention fully shows the following advantages:

①Dry dust is reduced in the sorting machine, which avoids the problem of easy environmental pollution;

②Dry dust is reduced in the sorting machine and the hidden danger of explosion is eliminated;

③Simple system, stable operation, high reliability, low sorting cost and environmental protection. To sum up, the advantages of the present invention are: reducing dry dust, avoiding the problem of easily polluting the environment, eliminating the hidden danger of explosion, simple system, stable operation, high reliability, low sorting cost, and environmental protection. The new economical and efficient fog dry separation method and system in the separation industry is especially suitable for use in high gas mines, and the system for lump coal gangue discharge is simpler.

Description of drawings:

Figure 1 shows a schematic diagram of a mist dry separation system.

Detailed ways:

Embodiment 1: A mist dry sorting method, including existing dry sorting methods using air as a medium, such as air jigging sorting methods, composite dry sorting methods, etc. Shakers (including but not limited to these two kinds of equipment) are based on other dry sorting methods constructed in combination with air flow. In the above methods, the present invention uses mist medium instead of air medium to realize dry sorting in mist environment, The dry dust produced in a large amount in the existing dry separator is reduced from the root, and the purpose of the invention is achieved.

Based on the same principle and method, in the above embodiment, the mist medium is replaced with dry mist, or wet mist, or supersaturated water mist, or mist produced by mixing two or more media, or The same purpose and effect can also be achieved by the water foam mist generated by the action of water and the foaming agent, or by using saturated water vapor as the medium for specific materials (including but not limited to the above).

Embodiment 2: The fog dry sorting system and process flow of the present invention are described in detail below in conjunction with accompanying drawing 1: A fog dry sorting system of the present invention mainly includes a raw material preparation unit, a mist preparation unit, and a pressure unit. , dry selection unit, circulating purification unit, product unit, etc. The raw material preparation unit prepares the raw materials into the materials required by the dry sorting machine through processes such as crushing and screening according to the requirements of the sorting target (including but not limited to), and then sends the sorted materials to the dry sorting unit. Selection, the material under the sieve is sent to the product unit separately; the mist preparation unit selects suitable mist and mist amount according to the sorting target and the requirements of the material, the mist type is as described in Example 1, and the purpose is to achieve economical and reasonable, To achieve the purpose of removing dry micro-dust, the mist volume should be sent to the air compressor unit according to the needs of the work flow after preparation. The feeding point can be before the fan or after the fan; The goal is to mix the circulating purified gas and the mist and send it to the dry separation unit as needed; the material to be sorted that enters after the dry separation unit starts the equipment is sorted under the combined action of the mist airflow and the movement force of the equipment. During the sorting process, the mist in the mist is combined with the dry fine dust particles in the sorted material, or with the dry fine dust particles adhered to the surface of the sorted material, so that the dry fine dust is humidified, and the wet fine dust particles are combined. , a part is taken away by the sorted material, and a part of the separated material is carried into the exhaust gas by the air flow. The sorted concentrate, medium ore and tailings products are respectively sent to each product bin of the product unit. The waste gas is sent to the circulation purification unit; the circulation purification unit recovers the material particles in the waste gas and sends them into the product unit unit silo as required, and the purified air is sent to the air compressor unit for recycling.

Based on the same principle and method, in the above embodiment, the mist preparation unit and the gas pressure unit can be combined into one unit, that is, completed by an integrated device, which can also achieve the purpose and effect of the invention.

Based on the same principle and method, the present invention can change the dry separator into a two-product or multi-product sorting device in the above embodiment, which can also achieve the purpose and effect of the invention.

As described above, the use of a mist dry separation method and system of the present invention reduces the dry dust generated in large quantities in the existing dry separator from the root, changes the problem of fine dust treatment existing in the prior art, and reduces the It eliminates the hidden danger of explosion of micro-dust, and realizes the mist dry separation method and system with simple system, stable operation, high reliability, low separation cost and environmental protection. It is a new economical and efficient method in the separation industry. The mist dry separation method and system are especially suitable for use in high gas mines, and the dry gangue discharge system for lump coal is simpler.

The present invention discloses a mist dry separation method and system. Although a few examples are listed above, some modifications, improvements, replacements, etc., made to the present invention will be appreciated by those of ordinary skill in the art. , or any combination of the above-mentioned embodiments, all fall within the protection scope of the present invention.

Claims (8)

1. a mist dry sorting method, comprising the existing dry sorting method with air as a medium, it is characterized in that: replace air medium with mist medium to realize dry sorting, reduce the mass production in existing dry sorting machine of dry dust. 2 . The method for sorting by mist dry method according to claim 1 , wherein the mist medium is dry mist. 3 . 3 . The method for sorting by mist dry method according to claim 1 , wherein the mist medium is wet mist. 4 . 4. The mist dry separation method according to claim 1, wherein the mist medium is supersaturated water mist. 5. The mist dry separation method according to claim 1, wherein the mist medium is a mist produced by mixing two or more media. 6 . The method for sorting by mist dry method according to claim 1 , wherein the mist medium is a water foam mist generated by the action of water and a foaming agent. 7 . 7. Realize the mist dry separation system described in any of the above 1-6 claims, mainly comprising a raw material preparation unit, a mist preparation unit, a gas pressure unit, a dry separation unit, a circulating purification unit, a product unit, etc., characterized in that the The raw material preparation unit sends the prepared material to be sorted into the dry separation unit, the mist preparation unit sends the prepared mist into the air compression unit, the air compression unit sends the mixed mist into the dry separation unit, and the dry The products sorted by the separation unit enter the product unit, the waste gas generated by the dry separation unit enters the circulation purification unit, the air purified by the circulation purification unit enters the air compression unit, and the microparticles separated by the circulation purification unit enter the product unit. 8 . The mist dry separation system according to claim 7 , wherein the mist preparation unit and the gas compression unit are combined into one unit. 9 .

Images