CN210241714U

CN210241714U - Low end difference type heating network heater

Info

Publication number: CN210241714U
Application number: CN201921002238.2U
Authority: CN
Inventors: Yugang Fang; 房玉刚; Linfeng Dong; 董林峰; Lishuai Fang; 房立帅
Original assignee: Shandong Lurun Thermal Power Technology Co ltd
Current assignee: Shandong Lurun Thermal Power Technology Co ltd
Priority date: 2019-06-28
Filing date: 2019-06-28
Publication date: 2020-04-03
Anticipated expiration: 2029-06-28

Abstract

The utility model discloses a low end difference type heat supply network heater, including front end pipe case, casing, tube bank, tube sheet and rear end pipe case, front end pipe case and rear end pipe case are connected with the casing through the tube sheet respectively, and the tube bank that the backup pad supported is arranged to the level in the casing, is equipped with steam inlet and drain trap on the casing, is equipped with the protecting against shock board between steam inlet and the tube bank, installs a plurality of changes condensate water flow to the weir on the inner wall of casing bottom. The steam from the steam inlet is dispersed through the anti-impact diversion of the anti-impact plate, so that the impact of the steam on the tube bundle is reduced, the steam is ensured to be contacted with all heat exchange tubes as far as possible, and the heat exchange efficiency is improved. The steam is condensed into water and then is gathered at the bottom of the shell, and all the condensed water flows in a turbulent way at the bottom of the shell under the forced action of the half-moon-shaped water weir, and does not flow away through the drain port stably. And the condensed water carries out secondary heat exchange with the tube bundle at the bottom of the shell again in the flowing process of the condensed water, and the heat in the condensed water is further utilized.

Description

Low end difference type heating network heater

Technical Field

The utility model relates to a heater technical field, in particular to poor type heat supply network heater of low side.

Background

With the increase of newly-built power plants and the increasing demand of central heating, the application of the heat supply network heater is more and more extensive, and the heat supply network heater is indispensable medium-hardness equipment no matter the power plant cogeneration project or the starting of the steam-heat exchange project of a heat supply company; the temperature of the condensed water of the heater of the heat supply network at the present stage is generally higher, most of the difference of the lower ends of the heaters is very large, the area of the heat exchanger can only be greatly increased if the temperature of the condensed water is reduced, however, the heat exchange coefficient of the shell-and-tube type is very low for water-water heat exchange, the cost is increased and the occupied area of equipment is increased simply by increasing the heat exchange area, and the transportation and installation of the equipment are not facilitated.

The low end difference type heat supply network heater is one new type of heat supply network heater with steam from steam turbine or boiler to heat the circulating water in hot water supplying system to meet the heat supply requirement. Compared with other heat supply network heater devices, the low-end-difference heat supply network heater has high heat exchange efficiency, greatly reduces the outlet water temperature of condensed water, and has outstanding effects on energy conservation and emission reduction. It is the most ideal steam heating equipment in the heat and power cogeneration project and the heating system of the heat supply network. The temperature of the condensed water generated by the existing low-end-difference type heat supply network heater is very high, the condensed water is gathered at the bottom of the shell and flows away through the drain hole stably, and the energy of the condensed water is wasted.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems existing in the prior art, the utility model provides a low end difference type heating network heater.

The utility model provides a technical scheme that its technical problem adopted is: this kind of low end difference type heat supply network heater, including front end pipe case, casing, tube bank, tube sheet and rear end pipe case, front end pipe case and rear end pipe case are connected with the casing through the tube sheet respectively, and the tube bank that the backup pad supported has been arranged to the level in the casing, is equipped with steam inlet and drain trap on the casing, and its characterized in that is equipped with the protecting against shock plate between steam inlet and the tube bank, installs the water weir that a plurality of changes condensate flow are to on the inner wall of casing bottom.

Further, be equipped with two steam inlet on the casing, correspond every steam inlet position and install an impingement baffle, the area of impingement baffle is greater than steam inlet's area.

Furthermore, a plurality of half moon-shaped water weirs for changing the flow direction of the condensed water are arranged on the inner wall of the bottom of the shell along the length direction of the shell, the outer diameter of each half moon-shaped water weir is matched with the shell, and the inner diameter of each half moon-shaped water weir is matched with the supporting plate.

Furthermore, the bottom of the water weir is provided with a liquid through hole.

To sum up, the utility model discloses an above-mentioned technical scheme's beneficial effect as follows:

1. through impingement plate impingement flow guide dispersion come from steam inlet's steam, reduced the impact of steam to the tube bank.

2. The steam dispersed by diversion enters the heat exchange tube bundle to exchange heat, so that the steam is ensured to contact with all the heat exchange tubes as much as possible, and the heat exchange efficiency is improved.

3. The steam is condensed into water and then is gathered at the bottom of the shell, and all the condensed water flows in a turbulent way at the bottom of the shell under the forced action of the half-moon-shaped water weir, and does not flow away through the drain port stably. And the condensed water carries out secondary heat exchange with the tube bundle at the bottom of the shell again in the flowing process of the condensed water, and the heat in the condensed water is further utilized.

4. The bottom of the half-moon-shaped water weir is provided with a liquid through hole, so that condensed water at the water weir can be ensured to be in flow all the time, and a dead water area can not be formed.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a cross-sectional view of fig. 1A-a.

FIG. 3 is a schematic view of a half-moon shaped weir.

In the figure:

1. front end tube case, 2, tube sheet, 3, casing, 4, tube bank, 5, rear end tube case, 6, semilunar weir, 7, steam inlet, 8, drain, 9, protecting against the plate, 10, the liquid through-hole.

Detailed Description

The features and principles of the present invention will be described in detail below with reference to the accompanying drawings, and the illustrated embodiments are only for explaining the present invention, and do not limit the scope of the present invention.

As shown in fig. 1 and 2, the low end difference type heat supply network heater includes a front end tube box 1, a shell 3, a tube bundle 4, a tube plate 2 and a rear end tube box 5, wherein the front end tube box 1 and the rear end tube box 5 are respectively connected with the shell 3 through the tube plate 2. A tube bundle 4 supported by a supporting plate is horizontally arranged in the shell 3, and a steam inlet 7 and a drain port 8 are arranged on the shell 3.

Be equipped with two steam inlet 7 on the casing 3, correspond 7 positions of every steam inlet and install a impingement baffle 9, impingement baffle 9 is located between steam inlet 7 and tube bank 4, and impingement baffle 9's area is greater than steam inlet 7's area. The impact of the steam on the tube bundle 4 is reduced by dispersing the steam from the steam inlet 7 through the impact prevention guide of the impact prevention plate 9. In addition, the steam dispersed by diversion enters the heat exchange tube bundle 4 for heat exchange, so that the steam is ensured to contact with all the heat exchange tubes as much as possible, and the heat exchange efficiency is improved.

As shown in fig. 2 and 3, a plurality of water weirs for changing the flow direction of the condensed water are installed on the inner wall of the bottom of the housing 3, specifically, a plurality of meniscus water weirs 6 for changing the flow direction of the condensed water are installed on the inner wall of the bottom of the housing 3 along the length direction of the housing 3, the outer diameter of the meniscus water weirs 6 is matched with the housing 3, and the inner diameter is matched with the supporting plate. Namely, the bottom of the half-moon-shaped water weir 6 is matched with the pipe diameter of the inner wall of the shell 3, fixed on the inner wall of the shell 3 and can be directly welded on the inner wall of the shell 3. The inner diameter of the half-moon shaped weir 6 does not interfere with the support plate.

The steam is condensed into water and then gathered at the bottom of the shell 3, and all the condensed water flows in a turbulent way at the bottom of the shell 3 under the forced action of the half-moon-shaped water weir 6 and does not flow away through the drain port 8 stably. The condensed water carries out secondary heat exchange with the tube bundle 4 at the bottom of the shell 3 again in the flowing process, and the heat in the condensed water is further utilized.

The bottom of the weir is provided with a liquid through hole 10, namely the liquid through hole 10 is arranged between the bottom of the weir and the shell 3, so that condensed water at the weir can be ensured to be in flow all the time, a dead water area can not be formed, and the utilization rate of heat in the condensed water is improved.

The above-mentioned embodiments are merely illustrative of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, which is defined by the appended claims.

Claims

1. The low end difference type heat supply network heater comprises a front end pipe box, a shell, a pipe bundle, a pipe plate and a rear end pipe box, wherein the front end pipe box and the rear end pipe box are respectively connected with the shell through the pipe plate, the pipe bundle supported by a supporting plate is horizontally arranged in the shell, and the shell is provided with a steam inlet and a drain opening.

2. The low end difference type heat net heater of claim 1, wherein the housing is provided with two steam inlets, a baffle is installed corresponding to each steam inlet, and the area of the baffle is larger than that of the steam inlet.

3. The low end difference type heater of claim 1, wherein a plurality of meniscus dams changing the flow direction of the condensed water are installed on the inner wall of the bottom of the case along the length direction of the case, and the meniscus dams have an outer diameter matched with the case and an inner diameter matched with the supporting plate.

4. A low end differential type heat supply network heater according to claim 1 or 3, wherein the bottom of the water weir is provided with a liquid through hole.