WO2020029046A1 - Chaudière à récupération de chaleur de type à coque apte à l'élimination de cendres en ligne - Google Patents

Chaudière à récupération de chaleur de type à coque apte à l'élimination de cendres en ligne Download PDF

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Publication number
WO2020029046A1
WO2020029046A1 PCT/CN2018/099059 CN2018099059W WO2020029046A1 WO 2020029046 A1 WO2020029046 A1 WO 2020029046A1 CN 2018099059 W CN2018099059 W CN 2018099059W WO 2020029046 A1 WO2020029046 A1 WO 2020029046A1
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WO
WIPO (PCT)
Prior art keywords
boiler
shell
smoke box
ash
tube
Prior art date
Application number
PCT/CN2018/099059
Other languages
English (en)
Chinese (zh)
Inventor
刘祥斌
Original Assignee
江苏东九重工股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 江苏东九重工股份有限公司 filed Critical 江苏东九重工股份有限公司
Priority to PCT/CN2018/099059 priority Critical patent/WO2020029046A1/fr
Publication of WO2020029046A1 publication Critical patent/WO2020029046A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B1/00—Methods of steam generation characterised by form of heating method
    • F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
    • F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J1/00—Removing ash, clinker, or slag from combustion chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers

Definitions

  • the utility model belongs to a heat recovery system equipment, which is suitable for heat recovery of flue gas after incineration of waste gas and waste liquid in the chemical industry, and is particularly suitable for heat recovery of high-temperature flue gas from a cracking furnace in an alkylated waste sulfuric acid treatment device.
  • the boiler shell boiler heat exchange tubes are densely packed in the cylinder.
  • the heat exchange tubes are small diameter seamless tubes.
  • the high temperature furnace gas from the waste sulfuric acid cracking furnace flows continuously inside.
  • the ash accumulation speed in the tube is very fast.
  • the boiler is often shut down for safe operation. After the boiler cools down, it is manually entered into the furnace for dust removal, which causes a large amount of parking loss for users.
  • the high-temperature furnace gas from the waste sulfuric acid cracking furnace contains a small amount of molten cohesive dust and other types of dust. After running for a period of time, it is deposited on the inner wall of the heat exchange tube and blocked, due to the structural characteristics of the shell-type waste heat boiler It cannot be removed by mechanical means, and eventually the heat transfer of the boiler deteriorates and tube explosion accidents often occur.
  • the utility model aims at the above technical problems, and develops a shell-and-shell type waste heat boiler equipment with large diameter heat exchange tubes and capable of manually removing ash accumulated in the heat exchange tubes under the state of non-stop furnace under negative pressure.
  • a pot shell type waste heat boiler capable of online ash cleaning comprising: a pot shell, a steam drum, a front smoke box, a rear smoke box and a heat exchange tube, wherein the steam drum is located above the pot shell, and is composed of a rising pipe and a lowering pipe.
  • Tube support the bottom of the boiler body is supported on the cement pier by three supports; the heat exchange tube is a large-diameter heat exchange tube, and a first drop is set directly below the front smoke box side near the front tube plate side Ash hopper; a second ash drop hopper is set directly below the bottom of the rear smoke box near the side of the rear tube sheet; a heavy hammer-type automatic ash discharge valve is installed at the bottom of the first ash drop hopper and the bottom of the second ash drop hopper ; At the rear of the boiler, a number of ash cleaning channel devices are arranged on the rear smoke box in accordance with the number and position of the openings on the rear tube plate.
  • the three supports include a fixed support provided at the bottom of the boiler body, a first sliding support provided at the bottom of the front smoke box, and a second sliding support provided at the bottom of the rear smoke box.
  • the diameter of the heat exchange tube is 76 mm or more.
  • the surface of the front tube sheet is cast with a high temperature resistant fireproof protective layer.
  • a high temperature resistant protective sleeve is installed outside the boiler flue inlet.
  • a sealing cover is provided on each of the dust cleaning channel devices.
  • the ash cleaning channel device is set at the tail of the boiler, and is operated one by one.
  • the boiler can be cleaned without stopping the boiler, which reduces the economic loss caused by the shutdown of the boiler.
  • a heavy hammer-type automatic ash discharge valve is set at the bottom of the front and rear smoke bins, which can automatically fall when ash has accumulated to a certain amount, reducing the danger of manual operation.
  • FIG. 1 is a schematic diagram of a horizontal boiler shell type waste heat boiler according to the present invention
  • Fig. 1 the flue gas is diverted from the front smoke box 4, and the large-diameter heat exchange pipe 5 is flushed longitudinally, and the confluence is led out from the side to the next process in the rear smoke box 7.
  • the steam drum 1 is located above the pot shell 6 and is supported by the ascending pipe 3 and the descending pipe 2.
  • the boiler water enters the shell-side space of the pot shell 6 through the descending pipe 2 and then enters the steam drum 1 through the riser pipe 3 for steam-water separation after being heated.
  • the entire weight of the boiler is supported by three supports connected to the lower furnace body and the smoke box.
  • the fixed support 11 On the cement pier, the fixed support 11 is arranged below the furnace body, and the lower parts of the two ends of the cigarette box are respectively connected with the first sliding support 9 and the second sliding support 14 to meet the requirements of the expansion of the furnace body.
  • the dust cleaning channel device 8 can be quickly opened one by one, using a stainless steel cleaning rod, the cleaning rod is a long round steel of about ⁇ 20, and the top is equipped with a stainless steel wire brush to penetrate the cleaning channel 8
  • the steel wire brush directly reaches the inside of the large-diameter heat exchange tube 5 and pushes or withdraws the ash brush into the first ash dropping bucket 10 and the second ash dropping bucket 13 on the front and rear smoke boxes, and then passes the heavy-duty ash discharge valve 12 Free fall, and after the dust cleaning is completed, the sealing cover on the dust cleaning channel device 8 is closed.

Abstract

L'invention concerne une chaudière à récupération de chaleur de type à coque apte à l'élimination de cendres en ligne comprenant une coque (6), un tambour à vapeur (1), une boîte à fumée avant (4), une boîte à fumée arrière (7) et un tube d'échange de chaleur (5), le tambour à vapeur (1) étant situé au-dessus de la coque (6) et étant supporté par un tube de colonne montante (3) et un tube de descente (2). Le fond d'un corps de chaudière de la chaudière est supporté sur un pilier de ciment par l'intermédiaire de trois supports. Le tube d'échange de chaleur (5) est un tube d'échange de chaleur de grand diamètre. Un premier godet à cendres (10) est disposé directement au-dessous d'un côté du fond de la boîte à fumée avant (4) à proximité d'un panneau de tube avant. Un second godet à cendres (13) est disposé directement au-dessous d'un côté du fond de la boîte à fumée arrière (7) à proximité d'un panneau de tube arrière. Une soupape de décharge de cendres automatique de type marteau lourd (12) est montée au fond du premier godet de cendres (10) et au fond du second seau de cendres (13). Au niveau d'une partie queue de la chaudière, de multiples dispositifs formant canal d'élimination de cendres dont le nombre et les positions sont cohérents avec le nombre et les positions de trous sur le panneau de tube arrière sont agencés au niveau de la boîte de fumée arrière (7). La chaudière à récupération de chaleur permet d'effectuer l'élimination des cendres sur un tube d'échange de chaleur de chaudière sans affecter le fonctionnement normal de la chaudière.
PCT/CN2018/099059 2018-08-06 2018-08-06 Chaudière à récupération de chaleur de type à coque apte à l'élimination de cendres en ligne WO2020029046A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/099059 WO2020029046A1 (fr) 2018-08-06 2018-08-06 Chaudière à récupération de chaleur de type à coque apte à l'élimination de cendres en ligne

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2018/099059 WO2020029046A1 (fr) 2018-08-06 2018-08-06 Chaudière à récupération de chaleur de type à coque apte à l'élimination de cendres en ligne

Publications (1)

Publication Number Publication Date
WO2020029046A1 true WO2020029046A1 (fr) 2020-02-13

Family

ID=69413926

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2018/099059 WO2020029046A1 (fr) 2018-08-06 2018-08-06 Chaudière à récupération de chaleur de type à coque apte à l'élimination de cendres en ligne

Country Status (1)

Country Link
WO (1) WO2020029046A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014126329A (ja) * 2012-12-27 2014-07-07 Kawasaki Heavy Ind Ltd ダスト除去装置を備えた排熱ボイラーおよび熱交換器
CN105202555A (zh) * 2015-11-02 2015-12-30 北京德海通科技有限公司 一种势能脉冲清灰装置
CN205424876U (zh) * 2016-03-09 2016-08-03 江苏东九重工股份有限公司 一种能够在线清灰的锅壳式余热锅炉
CN207584795U (zh) * 2017-10-18 2018-07-06 中国华电科工集团有限公司 一种用于火电厂低低温省煤器的清灰装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2014126329A (ja) * 2012-12-27 2014-07-07 Kawasaki Heavy Ind Ltd ダスト除去装置を備えた排熱ボイラーおよび熱交換器
CN105202555A (zh) * 2015-11-02 2015-12-30 北京德海通科技有限公司 一种势能脉冲清灰装置
CN205424876U (zh) * 2016-03-09 2016-08-03 江苏东九重工股份有限公司 一种能够在线清灰的锅壳式余热锅炉
CN207584795U (zh) * 2017-10-18 2018-07-06 中国华电科工集团有限公司 一种用于火电厂低低温省煤器的清灰装置

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