CN209801439U - Vertical shell-and-tube structure steam electric boiler - Google Patents

Abstract

The utility model discloses a vertical shell and tube structure steam electric boiler belongs to boiler technical field. The steam electric boiler overcomes the defects that a large-tonnage steam electric boiler is lacked in the prior art and the current steam electric boiler generates gas slowly. The electric boiler mainly comprises an electric control cabinet and an electric boiler body, wherein the electric boiler body is of a vertical shell-and-tube structure and comprises a barrel body, a lower tube plate and an upper tube plate, the two ends of the barrel body are respectively provided with the lower tube plate and the upper tube plate, a plurality of tube holes are respectively formed in the lower tube plate and the upper tube plate, a plurality of electric heating tubes are fixedly welded in the tube holes and are connected with the electric control cabinet, a continuous blow-off pipe, a periodic blow-off pipe and a water distribution pipe are respectively installed on the barrel body, an even steam hole plate is installed on the upper side of the barrel body, a plurality of tube holes and a plurality of steam through holes are formed in the. The utility model is used for produce steam.

Description

Vertical shell-and-tube structure steam electric boiler

Technical Field

The utility model belongs to the technical field of the boiler, specifically speaking especially relates to a vertical shell and tube structure steam electric boiler.

Background

Currently in the boiler industry, particularly in the industrial field where large steam volume boilers are required, steam boilers are mostly coal-fired and oil-fired gas boilers, which generate flue gas when operating, causing environmental damage. Electric boilers are gradually emerging due to the compliance with the current national environmental protection requirements. Most steam electric boilers in the current market have the characteristic of small steam tonnage, the evaporation capacity of the steam electric boilers is less than two tons, users needing large-steam-quantity boilers cannot be met, and most steam electric boilers have the defect of slow gas production.

Disclosure of Invention

The utility model aims at providing a vertical shell and tube structure steam electric boiler to overcome and lack the slow shortcoming of large-tonnage steam electric boiler and current steam electric boiler production of gas among the prior art.

The utility model discloses an adopt following technical scheme to realize: the utility model provides a vertical shell and tube structure steam electric boiler, includes automatically controlled cabinet, electric boiler body is vertical shell and tube structure, electric boiler body includes barrel, lower tube sheet, top tube plate, and tube sheet and top tube plate under the barrel both ends were installed respectively are seted up a plurality of tube holes on lower tube sheet and the top tube sheet respectively, the tube hole in through welded fastening installation electrothermal tube, the electrothermal tube is connected with automatically controlled cabinet, install continuous blow off pipe, periodic blow off pipe and water distribution pipe on the barrel respectively, install the steam pipe on the top tube sheet, the even steam hole board of barrel side-mounting goes up the installation steam pipe on the tube sheet, sets up a plurality of tube holes and a plurality of steam through-hole on the even steam hole board.

Furthermore, the electric heating tube comprises a resistance wire, a lead-out rod and an insulator, the insulator is fixedly connected with the inner wall of the electric heating tube, the lead-out rod penetrates through the insulator and is connected with the resistance wire, and the resistance wire is wavy in the length direction.

Further, the number of the resistance wires is at least two.

Furthermore, a supporting ring is fixedly arranged in the electric heating tube, and a crack for fixing the resistance wire is formed in the supporting ring.

Further, the lower tube sheet and the upper tube sheet are flexible tube sheets.

further, a skirt is fixedly installed at the bottom of the electric boiler body.

Compared with the prior art, the beneficial effects of the utility model are that: the utility model can realize large evaporation capacity of steam, satisfy the user needing large steam boiler, through separating the electric boiler body from the electric control cabinet and welding a plurality of electric heating tubes on the tube plate, when large steam capacity is needed, we can increase the diameter of the upper tube plate and the lower tube plate and increase the number of the electric heating tubes; the utility model has no pollution in the operation process, the distribution density of the electric heating tubes is large, the water capacity in the electric boiler body is low, and the speed of producing steam and the heating efficiency are improved; the utility model discloses a vertical shell and tube structure, area is little, and the electrothermal tube passes through the welded mode with last tube sheet and lower tube sheet and fixes, makes the electrothermal tube when the heating, can also play the effect of supporting the tube sheet, has improved the structural strength of electric boiler body, can be better satisfy the utility model discloses a maximization.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

Fig. 2 is a schematic structural view of the electric heating tube of the present invention.

In the figure: 1. an electric control cabinet; 2. an electric boiler body; 3. a skirt; 4. an electric heating tube; 5. a wiring box; 2.1, lower tube plates; 2.2, a water distribution pipe; 2.3, a cylinder body; 2.4, a continuous sewage discharge pipe; 2.5, a steam homogenizing pore plate; 2.6, mounting a tube plate; 2.7, a periodic sewage draining pipe; 2.8, a steam pipe; 4.1, leading out a rod; 4.2, insulators; 4.3, resistance wires; 4.4, support ring.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings.

Example 1:

The utility model provides a vertical shell and tube structure steam electric boiler, includes automatically controlled cabinet 1, electric boiler body 2 is vertical shell and tube structure, electric boiler body 2 includes barrel 2.3, lower tube sheet 2.1, goes up tube sheet 2.6, and tube sheet 2.1 and last tube sheet 2.6 are installed respectively at barrel 2.3 both ends, set up a plurality of tube holes on lower tube sheet 2.1 and the last tube sheet 2.6 respectively, the tube hole in through welding fixed mounting electrothermal tube 4, electrothermal tube 4 is connected with cabinet 1, install automatically controlled pipe 2.4 in succession on barrel 2.3, periodic blow off pipe 2.7 and water distribution pipe 2.2 respectively, install steam pipe 2.8 on last tube sheet 2.6, even steam hole board 2.5 of barrel 2.3 upside installation, install steam pipe 2.8 on last tube sheet 2.6, set up a plurality of tube holes and a plurality of steam through-holes on the even orifice board 2.5 of steam.

The electric boiler body 2 of the utility model is of a vertical shell-and-tube structure, occupies small area, and the electric heating tube 4 is fixed with the lower tube plate 2.1 and the upper tube plate 2.6 in a welding mode, so that the electric heating tube 4 can also play a role of supporting the tube plates while heating, thereby improving the structural strength of the electric boiler body and better meeting the large-scale of the utility model; the utility model discloses when the operation, working medium in the electrothermal tube 4 heating electric boiler body 2 in the electric boiler body 2, the working medium is heated and forms the mixture of steam and water droplet, isolate the water droplet under electrothermal tube 4 and even vapour orifice plate 2.5 effect, at first because many electrothermal tubes 4 are staggered arrangement, the mixture of rising steam and water droplet rises in the clearance between many electrothermal tubes 4, the water droplet in the mixture can contact 4 outer walls of electric shock heat pipe, and adsorb by 4 outer walls of electrothermal tube and accomplish preliminary separation, then the mixture passes through even vapour orifice plate 2.5, the ascending speed greatly reduced of mixture, speed reduction is favorable to the gravity separation of steam and water droplet, even vapour orifice plate 2.5 can prevent that local steam load from concentrating, and then effectual steam space that utilizes, block the water droplet in the mixture. Meanwhile, feed water enters the bottom of the electric boiler body 2 through the water distribution pipe 2.2 to form hot water with high density, the hot water absorbs heat generated by the electric heating pipe 4 to realize natural circulation of working media, the continuous sewage discharge pipe 2.4 can discharge high-concentration boiler water in the electric boiler body 2, and the periodic sewage discharge pipe 2.7 can regularly replace the boiler water. The utility model discloses pollution-free in the operation process, the distribution density of electrothermal tube 4 is big moreover, accounts for the ratio at this internal water capacity of boiler and hangs down, has improved the speed of production steam and the efficiency that generates heat, receives the common gravity separation effect of electrothermal tube 4 and even steam hole board 2.5 during steam circulation moreover, and output steam quality is good.

the electric heating tube 4 comprises a resistance wire 4.3, a lead-out rod 4.1 and an insulator 4.2, the insulator 4.2 is fixedly connected with the inner wall of the electric heating tube 4, the lead-out rod 4.1 penetrates through the insulator 4.2 and is connected with the resistance wire 4.3, and the resistance wire 4.3 is wavy in the length direction.

Electrothermal tube 4 is including heating section and non-heating section, the heating section is 4 parts of electrothermal tube between 4.2 of both sides insulator, and non-heating section is 4 parts of electrothermal tube in the insulator 4.2 outside, sets up non-heating section and can avoid electrothermal tube 4 overheated, and protection electrothermal tube 4 can not warp or the fracture because of being heated with lower tube sheet 2.1 and upper tube sheet 2.6's welded joint, and the height that adds the hot section peak simultaneously is less than minimum safe water level, prevents that electrothermal tube 4 is overheated. Resistance wire 4.3 present wavy at length direction, wavy resistance wire 4.3 compares with traditional heliciform resistance wire 4.3, the anti damage to electrical components of inductance when reducible circular telegram or outage.

The number of the resistance wires 4.3 is at least two.

A supporting ring 4.4 is fixedly arranged in the electric heating tube 4, and a crack for fixing the resistance wire 4.3 is formed on the supporting ring 4.4.

Support ring 4.4 fixed mounting in electrothermal tube 4, resistance wire 4.3 is fixed in the crack of support ring 4.4, and support ring can make resistance wire 4.3 distribute at electrothermal tube 4 inner wall and satisfy insulating nature requirement.

The lower tube plate 2.1 and the upper tube plate 2.6 are flexible tube plates.

Lower tube sheet 2.1 and upper tube sheet 2.6 and barrel 2.3 realize being connected through the butt joint full penetration structure, 4 both ends of electrothermal tube pass down tube sheet 2.1 respectively and go up the tube hole on the tube sheet 2.6 and with lower tube sheet 2.1 and upper tube sheet 2.6 welded fastening. The lower tube plate 2.1 and the upper tube plate 2.6 adopt flexible tube plates, and the flexible tube plates have good structural continuity, so that the thickness of the flexible tube plates can be designed to be thinner than that of the rigid tube plates under the same use condition with the rigid tube plates, and the tube plates and the cylinder body 2.3 can be welded in equal thickness.

Even steam hole board 2.5 and electric boiler body 2 welded fastening, tubular hole on even steam hole board 2.5 is passed to electrothermal tube 4 moreover.

Electric boiler body 2 bottom fixed mounting skirt 3.

The electric boiler body 2 is placed on the skirt 3 and fixed with the working surface through the skirt 3.

Electric boiler body top installation wiring case 5. 4 tops of electrothermal tube are passed through the wire and are connected with automatically controlled cabinet 1, the wire at top is connected with automatically controlled cabinet 1 behind wiring case 5.

Claims (6)

1. The utility model provides a vertical shell and tube structure steam electric boiler, includes automatically controlled cabinet (1), electric boiler body (2), its characterized in that: the electric boiler is characterized in that the electric boiler body (2) is of a vertical shell-and-tube structure, the electric boiler body (2) comprises a barrel body (2.3), a lower tube plate (2.1) and an upper tube plate (2.6), the two ends of the barrel body (2.3) are respectively provided with the lower tube plate (2.1) and the upper tube plate (2.6), a plurality of tube holes are respectively formed in the lower tube plate (2.1) and the upper tube plate (2.6), the tube holes are internally provided with electric heating tubes (4) through welding and fixing, the electric heating tubes (4) are connected with an electric control cabinet (1), the barrel body (2.3) is respectively provided with continuous blow-off tubes (2.4), regular blow-off tubes (2.7) and water distribution tubes (2.2), the upper tube plate (2.6) is provided with steam tubes (2.8), the steam hole plate (2.5) is arranged on the upper side of the barrel body (2.3), and a plurality of tube.

2. The vertical shell-and-tube structured steam electric boiler according to claim 1, characterized in that: the electric heating tube (4) comprises a resistance wire (4.3), a lead-out rod (4.1) and an insulator (4.2), the insulator (4.2) is fixedly connected with the inner wall of the electric heating tube (4), the lead-out rod (4.1) penetrates through the insulator (4.2) and is connected with the resistance wire (4.3), and the resistance wire (4.3) is wavy in the length direction.

3. The vertical shell and tube structured steam electric boiler of claim 2, further characterized by: the number of the resistance wires (4.3) is at least two.

4. The vertical shell-and-tube structured steam electric boiler according to claim 3, characterized in that: a supporting ring (4.4) is fixedly arranged in the electric heating tube (4), and a crack for fixing the resistance wire is formed in the supporting ring (4.4).

5. The vertical shell-and-tube structured steam electric boiler according to claim 1, characterized in that: the lower tube plate (2.1) and the upper tube plate (2.6) are flexible tube plates.

6. The vertical shell-and-tube structured steam electric boiler according to any one of claims 1 to 5, characterized in that: and a skirt (3) is fixedly installed at the bottom of the electric boiler body (2).