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CN-224230797-U - Non-blocking preheating device in front of coal water slurry furnace

CN224230797UCN 224230797 UCN224230797 UCN 224230797UCN-224230797-U

Abstract

The utility model provides a non-blocking coal water slurry stokehold preheating device which comprises a pipeline shell, a heating assembly, a steam inlet header, a steam outlet header and ‌ ultrasonic anti-blocking assemblies, wherein the heating assembly is horizontally arranged in a matrix mode and is suitable for the pipeline shell and comprises a heating unit and heating pipe headers, the heating pipe headers are arranged at two ends of the heating unit, the steam inlet header and the steam outlet header are arranged on the pipeline shell, a steam inlet and a steam outlet are correspondingly arranged on the steam inlet header and the steam outlet header, the steam inlet and the steam outlet are respectively corresponding to the heating pipe headers at two ends of the heating unit, and the ‌ ultrasonic anti-blocking assemblies comprise ultrasonic transducers which are respectively arranged on the steam inlet header and the steam outlet header. The utility model can solve the problem of blockage caused by scaling and deposition in the heating process of the coal water slurry, and simultaneously improves the heat transfer efficiency and the combustion stability.

Inventors

  • CHU XINGQUAN
  • WU BOGANG
  • ZHANG YAOTIAN
  • LIU ZHENGGUO

Assignees

  • 上海兴全电力技术有限公司

Dates

Publication Date
20260512
Application Date
20250729

Claims (6)

  1. 1. The non-blocking coal water slurry stokehold preheating device is characterized by comprising a pipeline shell (1), a heating assembly, a steam inlet header (4), a steam outlet header (5) and ‌ ultrasonic anti-blocking assemblies; the heating assembly is arranged in the pipeline shell (1) in a horizontal matrix manner and comprises a heating unit and heating pipe headers (3), and the heating pipe headers (3) are arranged at two ends of the heating unit; The steam inlet header (4) and the steam outlet header (5) are arranged on the pipeline shell (1), a steam inlet (6) and a steam outlet (7) are correspondingly arranged on the steam inlet header (4) and the steam outlet header (5), and the steam inlet (6) and the steam outlet (7) respectively correspond to the heating pipe headers (3) at two ends of the heating unit; The ‌ ultrasonic anti-blocking assembly comprises an ultrasonic transducer (8) which is respectively arranged on the steam inlet header (4) and the steam outlet header (5).
  2. 2. The non-clogging stoker preheating device of claim 1, wherein the heating unit comprises a plurality of groups of heating pipes (2) which are arranged in a horizontal matrix in the pipeline shell (1), and the heating pipe header (3) is respectively arranged at two ends of each group of heating pipes (2).
  3. 3. The non-clogging stokehole preheating device of claim 1, wherein gaps are reserved between the heating pipe headers (3) corresponding to two ends of the heating pipes (2), and the heating pipe headers (3) are reserved with the inner wall of the pipeline shell (1).
  4. 4. The non-blocking pre-heating device for the water-coal-slurry stoker according to claim 1, wherein a diversion cone (11) is arranged on the outer side of the heating pipe header (3) and used for reducing vortex resistance of the water-coal-slurry in the flowing process.
  5. 5. The non-clogging stokehold preheating device of claim 1, wherein the middle section of the pipeline housing (1) is provided with an ultrasonic transducer (8).
  6. 6. The non-clogging stokehold preheating device of claim 1, wherein the pipe housing (1), the heating pipe (2), the heating pipe header (3), the steam inlet header (4) and the steam outlet header (5) are all made of metal materials.

Description

Non-blocking preheating device in front of coal water slurry furnace Technical Field The utility model belongs to the technical field of coal water slurry combustion, and particularly relates to an anti-blocking efficient heating device for preheating of a coal water slurry furnace. Background The water-coal slurry is a novel high-efficiency clean coal-based fuel, and the combustion process comprises a heating stage, a water evaporation stage, volatile matter precipitation combustion, carbon particle ignition and burnout stages and the like. However, the coal water slurry heating and water evaporation stage may lead to a delay in ignition and a decrease in combustion stability. The study shows that the preheating of the front of the coal water slurry can shorten the ignition induction period and stabilize ignition and combustion. When the preheating temperature is higher, the water evaporation rate is high, and partial water vapor is possibly caused to stay in slurry drops to form a steam explosion effect, so that secondary atomization is generated, the burnout time of carbon particles is shortened, the temperature of a combustion center is increased, and the incomplete combustion rate is reduced. Therefore, the preheating of the water-coal-slurry in front of the furnace is important for the reliable operation and the efficient stable combustion of the combustion system. However, when the water-coal-slurry is heated at present, the scaling blockage of the heater is a bottleneck for restricting the preheating popularization and application of the water-coal-slurry in front of the furnace. The method mainly comprises the steps that calcium, magnesium and other ions in the coal water slurry can be separated out and crystallized to form a scale layer when being heated, organic matters are heated and converged to form viscous matters, the viscous matters adhere to the pipe wall and form a complex scale layer, when the flow speed is low, flowing dead angles and vortex areas are easy to occur, solid particles and the viscous matters are deposited, and the inner wall of the pipe can be eroded and worn by the solid particles at high speed to accelerate scaling and influence structural integrity. The existing sleeve type heater is difficult to scale and block, but has low heating efficiency, the shell and tube type heater has high heating efficiency, but has serious blocking, the spiral baffle plate heat exchanger is adopted to prolong the blocking time, but the shell flow rate is low, the scaling blocking problem can not be avoided, the overhaul workload after scaling is large, the long-term stable operation of the system is influenced, and the key problem of preventing the popularization of the preheating technology in front of the coal water slurry furnace is solved. Because of the scaling and blocking problems in the heating process of the coal water slurry, the popularization and implementation of the pre-heating technology of the coal water slurry in front of the furnace are affected and limited. Disclosure of utility model The utility model aims to provide a heat exchanger for heating coal water slurry, which solves the problems of scaling, low heat transfer efficiency and high maintenance cost of the traditional heater by combining structural optimization with an ultrasonic technology. The aims of long-term stable operation, no scaling, no blockage, high heating efficiency and no maintenance are fulfilled, and the method has important significance for popularization and application of the coal water slurry combustion technology. In order to achieve the above purpose, the present utility model adopts the following technical scheme: A non-blocking preheating device in front of a coal water slurry furnace comprises a pipeline shell, a heating assembly, a steam inlet header, a steam outlet header and ‌ ultrasonic anti-blocking assemblies; The heating assembly is suitable for the pipeline shell by adopting horizontal matrix arrangement and comprises a heating unit and heating pipe headers, wherein the heating pipe headers are arranged at two ends of the heating unit; The steam inlet header and the steam outlet header are arranged on the pipeline shell, a steam inlet and a steam outlet are correspondingly arranged on the steam inlet header and the steam outlet header, and the steam inlet and the steam outlet respectively correspond to the heating pipe headers at two ends of the heating unit; The ‌ ultrasonic anti-blocking assembly comprises an ultrasonic transducer which is respectively arranged on the steam inlet header and the steam outlet header. Preferably, the heating unit comprises a plurality of groups of heating pipes which are arranged in a horizontal matrix in the pipeline shell, and the heating pipe header is respectively arranged at two ends of each group of heating pipes. Preferably, gaps are reserved between the heating pipe headers corresponding to the two ends of the heating pipes, and gaps are rese