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CN-224215911-U - Novel heat medium conduction combined type cement cooler

CN224215911UCN 224215911 UCN224215911 UCN 224215911UCN-224215911-U

Abstract

The utility model relates to the technical field of hot cement cooling equipment, and discloses a heat medium conduction composite cement cooler. The cement cooling device comprises a cement circulation sealing cavity and a cooling cavity which are independently arranged, wherein heat transfer is carried out between the cement circulation sealing cavity and the cooling cavity through a heat transfer component, and the component mainly comprises an evaporation unit and a condensation unit which are internally provided with heating medium. The water circulation system sprays water to the condensing unit through the spraying device, a water film is formed on the surface of the condensing unit, the condensing unit is intensively cooled through water flow heat transfer and water evaporation phase change heat transfer, and the water circulation system is matched with air convection in the cooling cavity and heat medium phase change (or convection) heat transfer in the heat transfer component to form a three-in-one composite cooling system. The hot cement releases heat to vaporize the heat medium, and the heat medium steam is liquefied and flows back to the condensing unit to realize closed circulation. Compared with the traditional equipment, the heat exchange efficiency of the device is improved by more than 40%, the water saving can reach 80% -90%, the ton electricity consumption is reduced by 60% -85%, and the occupied area is reduced by 30% -50%.

Inventors

  • JIN WANJIN

Assignees

  • 大连九五高科新能源发展有限公司

Dates

Publication Date
20260508
Application Date
20250523

Claims (10)

  1. 1. A heat medium conductive composite cement cooler, comprising: a) The cement cooling device comprises a cement circulation sealing cavity and a cooling cavity which are mutually independent, wherein a cement inlet is formed in the top of the cement circulation sealing cavity, a cement outlet is formed in the bottom of the cement circulation sealing cavity, an air inlet is formed in the side wall of the lower part of the cooling cavity, and an air outlet is formed in the top of the cooling cavity; b) The heat transfer assembly mainly comprises an evaporation unit and a condensation unit, wherein the evaporation unit is internally provided with a heating medium and is arranged in the cement circulation sealing cavity, and the condensation unit is arranged in the cooling cavity; c) The water circulation system comprises a water tank arranged at the bottom or below the cooling cavity, a water pump connected with the water tank in sequence through a pipeline and a spraying device arranged at the top of the condensing unit; d) The cement uniform distribution device is arranged at the upper part of the cement circulation sealing cavity; e) The cement conveying power device is arranged on the outer wall of the cement circulation sealing cavity; f) The ash removing device is arranged on the side surface of the evaporation unit; g) An axial flow fan or a draught fan arranged at the air outlet.
  2. 2. The cement cooler of claim 1, wherein the evaporation unit is mounted at a lower elevation than the condensing unit.
  3. 3. The cement cooler of claim 1, wherein the cement delivery power device is at least one of a ‌ sonic device, a mechanical vibratory device, a pulse-jet device, or a compressed air delivery device.
  4. 4. The cement cooler according to claim 1, wherein the outer wall of the heat exchanging surface of the evaporation unit is provided with a wear resistant and corrosion resistant coating.
  5. 5. The cement cooler of claim 1, wherein the charge of the heating medium in the heat transfer assembly is 5% -100% of the volume of the evaporation unit.
  6. 6. The cement cooler of claim 1, wherein the vacuum within the heat transfer assembly is 10 -4 -10 -1 Pa.
  7. 7. The cement cooler according to claim 1, wherein the water tank is provided with a water replenishment line, a dosing device and a blow down line.
  8. 8. The cement cooler according to claim 7, wherein the water replenishment line, the dosing device and the blow-down line are each provided with an automatic control device.
  9. 9. Cement cooler according to any one of claims 1-8, characterised in that the axial flow fan or draught fan and the water pump are provided with variable frequency control means.
  10. 10. The cement cooler according to claim 9, further comprising an intelligent control system, wherein the intelligent control system comprises a temperature sensor and a cement flow rate monitoring probe which are arranged in the cement circulation sealing cavity, a temperature sensor and a water level sensor which are arranged on the heat exchange surfaces of the evaporation unit and the condensation unit, and a water quality monitoring probe which are arranged in the water tank, and a PLC (programmable logic controller) which dynamically adjusts the rotating speed of the fan, the spraying water quantity and the spraying pressure according to the cement temperature fed back by the sensors, the temperature difference of the condensation unit and the cement flow rate, and controls the valve to perform water supplementing, medicine adding and pollution discharging operations according to the temperature in the water tank, the water level sensor and the feedback result of water quality detection.

Description

Novel heat medium conduction combined type cement cooler Technical Field The utility model relates to the technical field of hot cement cooling equipment, in particular to a novel heat medium conduction composite cement cooler. Background In the modernization process of the cement industry, temperature control of finished products has become a core problem restricting technical upgrades of the industry. The temperature of the cement produced by the powder grinding process is generally up to 100-200 ℃ under the physical characteristic limit of energy conversion, and the cement is still maintained above 80 ℃ when leaving the factory even through the transportation and storage links. The continuous high temperature will cause multiple chain reactions, namely, the cement false setting phenomenon frequently occurs due to the aging of conveying equipment and the dehydration of gypsum, the packaging bag is easy to be fragile and damaged under the high temperature environment, and the damp and hot environment in the warehouse promotes the caking of cement particles, thereby seriously affecting the homogeneity of the product. More seriously, in special application scenes such as airport engineering, nuclear power engineering, deep sea infrastructure and the like, the initial temperature of cement needs to be strictly controlled below 65 ℃, which puts near-severe requirements on the prior cooling technology. The cooling scheme commonly adopted in the current industry mainly depends on air or water single medium heat exchange, and the temperature drop can only reach 30-60 ℃. The essential disadvantage of air cooling is that the specific heat capacity of air is low, and an oversized ventilation system is required to be configured for effective cooling, so that the occupied area of equipment is increased greatly and the energy consumption cost is increased. In contrast, the spiral lifting type cooler in the water cooling technology takes the mainstream place in industrialized application through the water curtain convection heat exchange of the outer wall of the cylinder, but the three technical bottlenecks are exposed, namely, firstly, the precision-machined cylinder needs to ensure the 0.05 mm-grade concentricity, the manufacturing cost of equipment is 2-3 times that of conventional equipment, secondly, the continuously-operated spiral lifting device has the ton electricity consumption reaching 0.5-1KWh, the ton water consumption of the water cooling system exceeds 0.5 cubic meter, the running cost of the equipment is high, the cooling efficiency of the equipment presents exponential decay along with scale accumulation, and the heat exchange coefficient is reduced by over 40% after 6 months of running. The improved horizontal spiral cooler represented by CN201753324U, CN101891061A improves the heat exchange efficiency to a certain extent through the structural innovation of the hollow shaft and the spiral blades, but fails to break through the fundamental limitations of the traditional technology, such as high installation, manufacturing and operation cost, large occupied area of equipment, lower heat exchange efficiency and the like. More significantly, the single heat exchange mode adopted by the existing cooling system has limited heat exchange efficiency, is difficult to cope with the temperature gradient change of cement particles in the conveying process, often has the phenomenon that the surface layer is rapidly cooled and the inside continuously stores heat, and finally leads to uneven temperature distribution of a finished product. Patent CN215288544U discloses a uniform feeding type cement cooling device, including upper and lower end is equipped with the cooling storehouse of feeder hopper and ejection of compact fill, fixedly on the outer wall in cooling storehouse be provided with the fin, the heat transfer board of cooling storehouse both sides slope arrangement sets up the heat exchange component on the heat exchange board, and the embedded heat exchange tube of heat exchange component absorbs cement heat through the water in the heat exchange tube, and then cools down for the cement. Although the technology utilizes the modes of air heat dissipation and water cooling heat dissipation at the same time, the heat exchange efficiency is relatively low due to sensible heat exchange. Furthermore, the present technique has a fatal disadvantage in that the heat exchange tube for circulating water is placed in the hot cement to be cooled. The cement particles have certain hardness, when the heat exchange tube runs for a period of time, leakage is possibly caused by abrasion, the quantity of cooling water is large, once the cooling water leaks into the cement, chemical reaction can occur with the cement, and serious production accidents are generated, so that how to isolate a cooling medium from the cement to be cooled and quickly and effectively transfer heat is a problem to be solved in the field. Conventional