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CN-224229971-U - Steam generator

CN224229971UCN 224229971 UCN224229971 UCN 224229971UCN-224229971-U

Abstract

The utility model discloses a steam generator, which comprises a hearth and a plurality of heat exchange pipes arranged in the hearth, wherein the heat exchange pipes are annularly distributed to form a heat exchange pipe ring; the heat exchange tube ring is characterized in that a heat insulation part is arranged in the middle of the inner side of the heat exchange tube ring and divides the heat exchange tube ring into a main heat exchange area and a superheat area, the inside of the heat exchange tube ring below the heat insulation part is the main heat exchange area, the inside of the heat exchange tube ring above the heat insulation part is the superheat area, and a combustor is arranged in the main heat exchange area. The utility model improves the heat exchange effect, prolongs the service life and reduces the maintenance rate.

Inventors

  • CUI SHUQING
  • YIN HAIPENG

Assignees

  • 苏州成强能源科技有限公司

Dates

Publication Date
20260512
Application Date
20250519

Claims (14)

  1. 1. The utility model provides a steam generator, includes furnace and sets up a plurality of heat exchange tube in furnace, many heat exchange tube ring cloth constitutes a heat exchange tube circle, its characterized in that: The heat exchange pipes are vertically arranged, a space is reserved between every two adjacent heat exchange pipes, the bottoms of the heat exchange pipes are water inlets, and the tops of the heat exchange pipes are steam outlets; the middle part of the inner side of the heat exchange tube ring is provided with a heat insulation component which divides the heat exchange tube ring into a main heat exchange area and a superheat area; The inside of the heat exchange tube ring below the heat insulation component is a main heat exchange area, and the inside of the heat exchange tube ring above the heat insulation component is a superheating area; And a burner is arranged in the main heat exchange area.
  2. 2. The steam generator of claim 1, wherein the primary heat exchange zone in which the burner is disposed comprises a combustion zone; And high-temperature flue gas generated by the combustion of the burner exchanges heat with the heat exchange tube at the main heat exchange area and then is sent to the smoke side area outside the heat exchange tube ring, and enters the overheat area inside the heat exchange tube ring from the smoke side area outside the heat exchange tube ring to exchange heat with the heat exchange tube at the overheat area.
  3. 3. The steam generator according to claim 1 or 2, wherein liquid water enters the heat exchange tube from the water inlet, is heated to be in a vapor state by the main heat exchange area and the superheating area, and is sent out from the vapor outlet; And/or, the medium in the heat exchange tube is respectively a liquid phase region, a vapor-liquid two-phase mixing region and a vapor state region from the water inlet to the vapor outlet, the liquid phase region is arranged at the main heat exchange region, the vapor state region is arranged at the superheat region, and the vapor-liquid two-phase mixing region is arranged at the joint of the main heat exchange region and the superheat region.
  4. 4. A steam generator as set forth in claim 1, wherein a plurality of fins are provided at intervals on an outer surface of each of said heat exchange tubes, and wherein a plurality of said fins are disposed along an extending direction of said heat exchange tubes.
  5. 5. The steam generator of claim 4, wherein the two opposite sides of each fin are respectively provided with a bend, and the bends are abutted against the bends of the fins above or below adjacent fins, and the outer parts of the heat exchange tubes between two adjacent fins form a flue gas channel; and/or the side part of the fin on each heat exchange tube is in contact with the side part of the fin on the adjacent heat exchange tube, or the side part of the fin on each heat exchange tube is arranged close to the side part of the fin on the adjacent heat exchange tube.
  6. 6. The steam generator of claim 5, wherein the bent ends of the fins at the main heat exchange area are disposed outside the heat exchange tube collar.
  7. 7. The steam generator of claim 5, wherein the bent ends of the fins in the superheat zone are disposed outside the heat exchange tube collar; And/or the other end of the fin at the superheating area is arranged at the inner side of the heat exchange tube ring.
  8. 8. The steam generator of claim 4, wherein a plurality of outer guide plates are further arranged on the outer side of the heat exchange tube ring, the side parts of each outer guide plate are respectively connected with or contacted with the side parts of the adjacent outer guide plates, each outer guide plate is opposite to a heat exchange tube, and the outer guide plates are connected with the fins or the heat exchange tubes.
  9. 9. The steam generator of claim 8, wherein a plurality of inner side guide plates are arranged in the superheating area, the side parts of each inner side guide plate are respectively connected with or contacted with the side parts of the adjacent inner side guide plates, each inner side guide plate is opposite to a heat exchange tube, and the inner side guide plates are connected with the fins or the heat exchange tubes.
  10. 10. The steam generator of claim 9, wherein the outer baffle and the inner baffle are respectively provided with through holes, and the through holes are arranged at intervals from bottom to top.
  11. 11. The steam generator of claim 1, wherein each heat exchange tube is further provided with a disturbance embedded tube, the disturbance embedded tube is arranged above the heat insulation component, and a space is reserved between the disturbance embedded tube and the inner wall of the heat exchange tube; and/or the disturbance embedded pipe and the heat exchange pipe are coaxially arranged.
  12. 12. The steam generator of claim 1, wherein a water inlet header and a steam header are respectively arranged at the bottom and the top of the hearth, the water inlet at the bottom of the heat exchange tube is communicated with the water inlet header, and the steam outlet at the top of the heat exchange tube is communicated with the steam header.
  13. 13. The steam generator of claim 12, wherein a steam outlet is formed in the top of the steam header, a steam-water separation plate is arranged in the steam header, and the steam-water separation plate is arranged between the steam outlet and the steam outlet; and/or, the steam-water separation plate is a multi-stage steam-water separation plate.
  14. 14. The steam generator according to claim 1 or 2, wherein a condensing heat exchanger is arranged beside the hearth, and a plurality of rows of condensing side heat exchange tubes which are arranged at intervals are arranged in the condensing heat exchanger; The superheating area is provided with a first smoke outlet which is communicated with a smoke inlet of the condensing heat exchanger; And the condensing heat exchanger is provided with a smoke exhaust pipe, and the smoke inlet and the smoke exhaust pipe are respectively arranged on the upper side and the lower side of the condensing side heat exchange pipe.

Description

Steam generator Technical Field The present utility model relates to a boiler, and more particularly, to a steam generator. Background A steam generator, also called a steam heat source machine (commonly called a boiler), is a mechanical device that heats water into hot water or steam using the heat energy of fuel or other energy sources. As a traditional steam generator, a horizontal type or a vertical type is generally adopted, and the conventional working principle is that (taking the heating of water flowing from bottom to top in a heat exchange tube as an example) the heat exchange tube is heated to heat the liquid state in the heat exchange tube into a steam state, and a steam drum is arranged above the heat exchange tube, so that steam in the steam state is sent out through the steam drum. For the steam generator with water volume more than or equal to 30L, the steam generator belongs to special equipment and needs monitoring and preparation. Aiming at the steam generator with the water volume smaller than 30L, the steam generator does not belong to the category of special equipment, and monitoring, backup and annual inspection are not needed. In order to miniaturize the gas steam generator as much as possible, in the conventional structure, taking vertical equipment as an example, a circle of heat exchange tubes is generally adopted, a combustion area is formed inside the circle of heat exchange tubes, high-temperature flue gas and heat radiation are utilized to heat the circle of heat exchange tubes, and liquid state in the heat exchange tubes is heated to be in a vapor state (liquid state medium is fed in from the bottom of the heat exchange tubes, and vapor state medium is fed out from the top of the heat exchange tubes). In this structure, there are the following problems: The water in the heat exchange tube is gradually heated into steam from the liquid state from bottom to top, namely the heat exchange tube is sequentially in the liquid state, the steam-liquid mixed state and the steam state from bottom to top, and the steam state has poor heat transfer performance, but the temperatures of all the positions in the combustion area are basically consistent, the high temperature received by the heat exchange tube in the liquid state area and the steam-liquid mixed state area can be directly transferred into the liquid water to heat the liquid water, the temperature received by the heat exchange tube in the liquid state and the steam-liquid mixed state below is 800-1000 ℃, the heat can be transferred into the liquid water to heat the liquid water to the steam state, and the condition that the heat exchange tube is dry-burned does not occur, so that the heat exchange tube cannot be burnt out. However, due to poor heat transfer properties in the vapor state, the heat exchange tubes at the vapor state region are substantially equivalent to being dry burned, and the temperature may be close to 500 ℃ or more than 500 ℃. In order to solve the problem, the conventional steam generator adopts heat-resistant alloy steel which is special alloy steel and can resist high temperature of 500 ℃ or more at the upper layer heat exchange tube (steam state area). However, in this structure, since the region is often dry-burned, even the heat-resistant alloy steel is easily damaged, resulting in a relatively short service life, a relatively high maintenance rate, and a relatively high cost of the heat-resistant alloy steel. If the temperature is lowered, the service life can be prolonged, and the maintenance rate is reduced, but the problem of insufficient steam dryness exists. If the water vapor does not contain liquid water, the vapor quality is 100%. The steam dryness of the boiler meeting the standard should reach more than 97%, and the excellent steam dryness of the boiler should reach more than 99%. If the steam quality is insufficient, not only is more heat lost, but more energy is consumed (e.g., more fuel gas is consumed by the fuel gas steam generator). Meanwhile, if more water is contained in the steam, the production process requirements of some end users cannot be met. Disclosure of Invention The utility model aims to provide a steam generator, which can effectively prolong the service life of equipment, reduce the maintenance rate and the cost and effectively ensure the use effect of the equipment by using the structure. In order to achieve the aim, the utility model adopts the technical scheme that the steam generator comprises a hearth and a plurality of heat exchange pipes arranged in the hearth, wherein a plurality of heat exchange pipe rings form a heat exchange pipe ring, The heat exchange pipes are vertically arranged, a space is reserved between every two adjacent heat exchange pipes, the bottoms of the heat exchange pipes are water inlets, and the tops of the heat exchange pipes are steam outlets; the middle part of the inner side of the heat exchange tube ring is provided with a heat insulatio