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CN-112594677-B - Vertical economizer of high-efficient heat transfer

CN112594677BCN 112594677 BCN112594677 BCN 112594677BCN-112594677-B

Abstract

A vertical economizer with high-efficiency heat exchange relates to boiler equipment and aims to solve the problem of low heat exchange efficiency of the existing economizer. The invention comprises a shell, a sleeve, a baffle, a tube plate and two groups of heat exchange straight tubes, wherein four tube plates are arranged in the shell, the four tube plates divide the shell into a first cavity, a second cavity, a third cavity, a fourth cavity and a fifth cavity from top to bottom in sequence, the second cavity is communicated with the third cavity, the baffle is arranged in the first cavity and divides the first cavity into a sixth cavity and a seventh cavity, the two groups of heat exchange straight tubes are arranged on the uppermost tube plate and the lowermost tube plate and are communicated with the first cavity and the fifth cavity, one group of heat exchange straight tubes are communicated with the sixth cavity, the other group of heat exchange straight tubes are communicated with the seventh cavity, and the sleeve is arranged on the two tube plates in the middle and is communicated with the second cavity and the fifth cavity. The invention increases the flow of the flue gas and the water, and improves the heat exchange efficiency of the economizer through multiple heat exchanges.

Inventors

  • ZHAO WENKUN

Assignees

  • 哈尔滨红旗锅炉有限公司

Dates

Publication Date
20260508
Application Date
20201217

Claims (8)

  1. 1. The utility model provides a vertical economizer of high-efficient heat transfer, a serial communication port, including casing (1), sleeve pipe (2), baffle (3), tube sheet (4) and two sets of heat exchange straight tube (5), be equipped with four tube sheet (4) in casing (1), four tube sheet (4) separate casing (1) from top to bottom into first cavity in proper order, second cavity (B), third cavity (C), fourth cavity (D) and fifth cavity (E), second cavity (B) and third cavity (C) intercommunication, baffle (3) set up in first cavity and separate into sixth cavity (A1) and seventh cavity (A2) with first cavity, two sets of heat exchange straight tube (5) set up on tube sheet (4) of uppermost and lowermost and with first cavity and fifth cavity (E) intercommunication, wherein one set of heat exchange straight tube (5) and sixth cavity (A1) intercommunication, another set of heat exchange (5) and seventh cavity (A2) intercommunication, sleeve pipe (2) set up two tube sheet (4) in the centre and separate into sixth cavity (A1) and fifth cavity (A2) and be equipped with heat exchange straight tube (5) and set up in the heat exchange straight tube (1) and the fifth cavity (A) intercommunication, the interval is equipped with between two sets of heat exchange straight tube (5) and six cavity (A1) and straight tube (E) is equipped with between the heat exchange straight tube (1), the seventh chamber (A2) is provided with a smoke outlet (h 2), the fourth chamber (D) is provided with a water inlet (h 3), and the third chamber (C) is provided with a water outlet (h 4); Each heat exchange straight pipe (5) communicated with the sixth cavity (A1) is provided with a spiral fin (6), and the spiral fin (6) is attached to a sleeve (2) sleeved on the heat exchange straight pipe (5) to form a spiral channel; The upper surface of a tube plate (4) at the top of the shell (1) is provided with an anti-corrosion layer (b) made of epoxy zinc-rich primer, the surface of the anti-corrosion layer (b) is provided with an expansion layer (c) made of epoxy coal tar pitch paint, and the expansion layer (c) is sequentially provided with a heat insulation layer (e) made of high-heat resistance pouring materials, a fire-resistant layer (d) made of fire-resistant pouring materials and a protective layer (f) made of thermal shock-resistant abrasive materials along the thickness direction of the tube plate (4).
  2. 2. A high efficiency heat exchanging vertical economizer according to claim 1 wherein each heat exchanging straight tube (5) of each set of heat exchanging straight tubes (5) is a threaded smoke tube.
  3. 3. The vertical economizer with high-efficiency heat exchange according to claim 1, wherein a plurality of transverse staggered baffle plates (7) are arranged in the third chamber (C), and the baffle plates (7) form a zigzag flow channel in the third chamber (C).
  4. 4. A vertical economizer with efficient heat exchange according to claim 1, characterized in that the water outlet (h 4) is arranged adjacent to the water inlet (h 3).
  5. 5. The vertical economizer with efficient heat exchange according to claim 1, wherein flange cover plates (8) are arranged at the top and the bottom of the shell (1), a first chamber is formed among the flange cover plates (8) at the top, the tube plates (4) at the top and the shell (1), a vertical partition plate (3) is arranged between the flange cover plates (8) at the top and the tube plates (4) at the top, a fifth chamber (E) is formed among the flange cover plates (8) at the bottom, the tube plates (4) at the bottom and the shell (1), and each flange cover plate (8) is detachably connected with the shell (1).
  6. 6. A high efficiency heat exchanging vertical coal economizer according to any one of claims 1-5, wherein the end of each heat exchanging straight tube (5) in each group of heat exchanging straight tubes (5) on the tube sheet (4) at the top and bottom of the housing (1) is provided with an anti-wear tube (a).
  7. 7. The efficient heat exchange vertical economizer as recited in claim 1 wherein the third chamber (C) is provided with an inspection manhole having a sealing flange.
  8. 8. A high efficiency heat exchanging vertical economizer according to claim 1 wherein each sleeve (2) is a threaded smoke tube.

Description

Vertical economizer of high-efficient heat transfer Technical Field The invention relates to boiler equipment, in particular to an economizer. Background The economizer is a device which is arranged at the lower part of the tail flue of the boiler and is used for recovering the waste heat of discharged smoke, and heats the boiler feed water into a heating surface of saturated water under the pressure of a steam drum. The flue gas flowing in the working process of the economizer exchanges heat with the heat exchange tube of the economizer, the temperature of the flue gas is reduced, the common flue gas flows outside the heat exchange tube, fins are arranged outside the heat exchange tube so as to improve the heat exchange, but the flue gas flows from one end of the economizer to the other end, the residence time is shorter, so that the heat exchange efficiency is lower, a large number of heat exchange tubes are required to be arranged to improve the heat exchange efficiency, the occupied space is larger, the utilization rate of equipment materials is lower, and the cost is higher. Disclosure of Invention The invention provides a vertical type coal economizer capable of efficiently exchanging heat, which aims to solve the problem of low heat exchanging efficiency of the existing coal economizer. The technical scheme adopted for solving the technical problems is as follows: The utility model provides a vertical economizer of high-efficient heat transfer, which comprises a housin, the sleeve pipe, the baffle, tube sheet and two sets of heat exchange straight tube, be equipped with four tube sheets in the casing, four tube sheets separate the casing from top to bottom in proper order into first cavity, the second cavity, the third cavity, fourth cavity and fifth cavity, second cavity and third cavity intercommunication, the baffle sets up in first cavity and separates into sixth cavity and seventh cavity with first cavity, two sets of heat exchange straight tube set up on the tube sheet of uppermost and lowermost and with first cavity and fifth cavity intercommunication, one set of heat exchange straight tube and sixth cavity intercommunication, another set of heat exchange straight tube and seventh cavity intercommunication, the sleeve pipe sets up on two tube sheets in the middle and with second cavity and fifth cavity intercommunication, set up the sleeve pipe and both are the interval setting on each heat exchange straight tube in the set of heat exchange straight tube with sixth cavity intercommunication, the seventh cavity is equipped with the smoke inlet, the fourth cavity is equipped with the smoke outlet, the third cavity is equipped with the delivery port. Preferably, each heat exchange straight tube in each group of heat exchange straight tubes is a threaded smoke tube. Preferably, each heat exchange straight pipe communicated with the cavity is provided with a spiral fin, and the spiral fins are attached to a sleeve sleeved on the heat exchange straight pipe to form a spiral channel. Preferably, a plurality of transverse staggered baffle plates are arranged in the third chamber, and the baffle plates form a folded flow channel in the third chamber. Preferably, the water outlet is located adjacent to the water inlet. Preferably, the top and the bottom of the shell are both provided with flange cover plates, a first cavity is formed among the flange cover plates at the top, the tube plates at the top and the shell, a vertical partition plate is arranged between the flange cover plates at the top and the tube plates at the top, a fifth cavity is formed among the flange cover plates at the bottom, the tube plates at the bottom and the shell, and each flange cover plate is detachably connected with the shell. Preferably, the end parts of each heat exchange straight pipe in each group of heat exchange straight pipes on the tube plates at the top and the bottom of the shell are provided with wear-resistant pipes. Preferably, the upper surface of the tube plate at the top of the shell is provided with an anti-corrosion layer made of epoxy zinc-rich primer, the surface of the anti-corrosion layer is provided with an expansion layer made of epoxy coal tar pitch paint, and the expansion layer is sequentially provided with a heat insulation layer made of high-heat resistance pouring materials, a fire-resistant layer made of fire-resistant pouring materials and a protective layer made of thermal shock resistant abrasive materials along the thickness direction of the tube plate. Preferably, the third chamber is provided with an inspection manhole, and the manhole is provided with a sealing flange. Preferably, each sleeve is a threaded smoke tube. Compared with the prior art, the invention has the following beneficial effects: 1. The invention sequentially enters the sixth chamber, the heat exchange straight pipe and the fifth chamber from the smoke inlet, and folds back the seventh chamber to be discharged from th