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CN-224208231-U - Energy recovery system for refined coal flotation and dehydration

CN224208231UCN 224208231 UCN224208231 UCN 224208231UCN-224208231-U

Abstract

The utility model provides an energy recovery system for clean coal flotation and dehydration, and relates to the technical field of clean coal flotation and dehydration equipment. The energy recovery system for the flotation and dehydration of the clean coal comprises a centrifugal dehydrator, a plate-type heat exchanger and a reagent storage mechanism, wherein the centrifugal dehydrator is used for processing water-containing clean coal produced by flotation equipment, the centrifugal dehydrator is at least provided with a first output pipe for discharging centrifugal liquid and a second output pipe plate-type heat exchanger for discharging dehydrated clean coal, the first output pipe is communicated with the first output pipe, the plate-type heat exchanger is provided with a first output port for discharging the centrifugal liquid after heat exchange, the reagent storage mechanism is communicated with the plate-type heat exchanger, the reagent storage mechanism is at least provided with a reagent outlet, a circulating communication pipeline is arranged between the plate-type heat exchanger and a water jacket layer, and a circulating water pump is arranged on the circulating communication pipeline and can drive circulating water to circulate between the plate-type heat exchanger and the water jacket layer, so that chemical reagent for the flotation is heated.

Inventors

  • ZHANG YULONG
  • HE CHANGJIANG
  • HE FAWANG

Assignees

  • 鄯善华越型煤制造有限公司

Dates

Publication Date
20260508
Application Date
20250425

Claims (10)

  1. 1. An energy recovery system for flotation and dehydration of clean coal, which is characterized by comprising: A centrifugal dehydrator (100) for treating water-containing clean coal produced by a flotation plant, said centrifugal dehydrator (100) having at least a first output pipe (112) for discharging the centrifugate and a second output pipe (114) for discharging the dehydrated clean coal A plate heat exchanger (200) communicating with the first output pipe (112), the plate heat exchanger (200) having a first output port (213) for discharging the heat exchanged centrifugal liquid, and A reagent storage mechanism (400) in communication with the plate heat exchanger (200), the reagent storage mechanism (400) having at least a reagent outlet (404); The circulating water pump (300) is arranged on the circulating communication pipeline, and the circulating water pump (300) can drive circulating water to circulate between the plate heat exchanger (200) and the water jacket layer (410), so that chemical reagent for flotation in the reagent storage mechanism (400) is heated.
  2. 2. The energy recovery system for refined coal flotation and dewatering according to claim 1, wherein the centrifugal dehydrator (100) comprises a centrifuge body (110) and a driving assembly (120), the centrifuge body (110) is provided with a centrifuge input pipe (111) and the first output pipe (112) and the second output pipe (114), and the driving assembly (120) is provided with at least a motor and a rotating shaft and a rotating drum which are arranged in the centrifuge body (110).
  3. 3. The energy recovery system for the flotation and dehydration of clean coal according to claim 1, wherein a filter (115) is arranged on a communicating pipeline between a first output pipe (112) of the centrifugal dehydrator (100) and the plate heat exchanger (200).
  4. 4. The energy recovery system for the flotation and dehydration of the clean coal according to claim 1, wherein the plate heat exchanger (200) is provided with at least a fixed compression plate (210), a first input port (211), a second input port (212), a second output port (214) and the first output port (213) are arranged on the fixed compression plate (210), the first input port (211) is communicated with the first output pipe (112), the second input port (212) is communicated with an output end (322) of the circulating water pump (300), and the second output port (214) is communicated with a water jacket layer (410) of the reagent storage mechanism (400).
  5. 5. The energy recovery system for refined coal flotation and dehydration as claimed in claim 4, wherein a supporting frame (220) is arranged on the plate heat exchanger (200), a first sliding rail (230) and a second sliding rail (240) are arranged between the supporting frame (220) and the fixed pressing plate (210), a movable pressing plate (250) is arranged on the first sliding rail (230) and the second sliding rail (240) in a sliding manner, and a cold-hot runner and a plurality of heat exchange plates (260) are arranged between the movable pressing plate (250) and the fixed pressing plate (210).
  6. 6. The energy recovery system for clean coal flotation and dewatering as set forth in claim 5, wherein said heat exchanging plate (260) is made of 316L stainless steel or titanium alloy material.
  7. 7. The energy recovery system for refined coal flotation and dewatering as claimed in any one of claims 1-6, characterized in that a stirring assembly (420) is provided on the reagent storage mechanism (400), the stirring assembly (420) comprising a stirring motor (421) provided outside the reagent storage mechanism (400), and a stirring shaft (422) and stirring blades (423) provided inside the reagent storage mechanism (400).
  8. 8. The energy recovery system for clean coal flotation and dewatering as claimed in any one of claims 1 to 6, wherein a second chemical inlet (402) and a water inlet (403) are provided at an upper outer portion of the reagent storage mechanism (400).
  9. 9. The energy recovery system for clean coal flotation dewatering as set forth in any one of claims 1 to 6, further comprising: the temperature control mechanism is at least provided with a PLC controller and a temperature sensor, the PLC controller is electrically communicated with the temperature sensor and the circulating water pump (300), the temperature sensor is arranged at a second output port (214) of the plate heat exchanger (200), and the temperature control mechanism can adjust the flow of the circulating water pump (300) according to the temperature of circulating water at the second output port (214).
  10. 10. The energy recovery system for clean coal flotation and dewatering as set forth in claim 9, wherein a three-way valve (500) is provided on a communication pipe between the second outlet (214) and the reagent storage means (400), a branch pipe of the three-way valve (500) is connected with a heating system (600), the three-way valve (500) is electrically connected with the temperature control means, and the temperature control means can perform flow distribution adjustment on both sides of the three-way valve (500) according to the temperature of circulating water at the second outlet (214).

Description

Energy recovery system for refined coal flotation and dehydration Technical Field The utility model relates to the technical field of clean coal flotation and dehydration equipment, in particular to an energy recovery system for clean coal flotation and dehydration. Background The flotation process is one of the core steps in the coal washing process and is mainly used for sorting fine particles and micro-fine particle materials. The flotation and dehydration process of clean coal is an important link in coal flotation processing, and aims to reduce the moisture content of clean coal through dehydration and improve the product quality and economic benefit. Common flotation dehydration technology comprises high-pressure squeezing and air-flow filter pressing dehydration technology, two-stage dehydration technology of flotation clean coal, technology of recycling coarse clean coal by a vibrating arc screen and a slime centrifuge, and technology of hydrophobic agglomeration centrifugal filtration dehydration of fine flotation clean coal. In the process related to the dehydration of the centrifugal machine, waste heat is usually generated by the centrifugate, and is the result of the combined action of a plurality of factors such as mechanical friction and chemical reaction in the dehydration process of the clean coal, heat is generated by friction between a rotor and materials in the high-speed rotation process of the centrifugal dehydrator, and is transferred to the centrifugate to raise the temperature of the centrifugate, and chemical substances possibly contained in the centrifugate can be reacted in the dehydration process, so that the heat is released. In the prior art, however, the centrifugal liquid with the waste heat is usually directly sent to a filter press for filtering treatment, or is recovered through a sedimentation tank, a bucket elevator and the like, wherein the waste heat cannot be utilized, and the waste of energy sources is caused. Disclosure of utility model The utility model provides an energy recovery system for clean coal flotation dehydration, which can recover and utilize the waste heat of the centrifugate of a centrifugal machine to carry out waste heat on chemical reagents for flotation, improve the energy utilization rate and improve the coal washing flotation efficiency at the same time, and solves the problems that the waste heat in the centrifugate is directly sent to other working procedures for treatment and recovery, and the waste heat cannot be utilized to cause energy waste in the prior art. The technical scheme adopted by the utility model is as follows: An energy recovery system for flotation and dehydration of clean coal, comprising: A centrifugal dehydrator for treating the water-containing clean coal produced by the flotation equipment, wherein the centrifugal dehydrator is provided with at least a first output pipe for discharging centrifugal liquid and a second output pipe for discharging dehydrated clean coal A plate heat exchanger communicated with the first output pipe and provided with a first output port for discharging centrifugal liquid after heat exchange, and The reagent storage mechanism is communicated with the plate heat exchanger and is provided with at least a reagent outlet; The circulating water pump can drive circulating water to circularly flow between the plate heat exchanger and the water jacket layer, so that chemical reagent for flotation in the reagent storage mechanism is heated. The centrifugal dehydrator comprises a centrifugal body and a driving assembly, wherein the centrifugal body is provided with a centrifugal input pipe, a first output pipe and a second output pipe, and the driving assembly is at least provided with a motor, a rotating shaft and a rotating drum, and the rotating shaft and the rotating drum are arranged in the centrifugal body. Further, a filter is arranged on a communicating pipeline between the first output pipe of the centrifugal dehydrator and the plate heat exchanger. The plate heat exchanger is characterized by further comprising a fixed compression plate, wherein a first input port, a second output port and a first output port are arranged on the fixed compression plate, the first input port is communicated with the first output pipe, the second input port is communicated with the output end of the circulating water pump, and the second output port is communicated with the water jacket layer of the reagent storage mechanism. Further, a support frame is arranged on the plate heat exchanger, a first sliding rail and a second sliding rail are arranged between the support frame and the fixed compression plate, a movable compression plate is arranged on the first sliding rail and the second sliding rail in a sliding mode, and a cold-hot runner and a plurality of heat exchange plates are arranged between the movable compression plate and the fixed compression plate. Further, the heat exchange plates are made of 316L