CN111207510A - No fan formula solid heat accumulation electric boiler - Google Patents
No fan formula solid heat accumulation electric boiler Download PDFInfo
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- CN111207510A CN111207510A CN202010058193.1A CN202010058193A CN111207510A CN 111207510 A CN111207510 A CN 111207510A CN 202010058193 A CN202010058193 A CN 202010058193A CN 111207510 A CN111207510 A CN 111207510A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/0208—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply
- F24H7/0233—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid using electrical energy supply the transfer fluid being water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/0005—Details for water heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/16—Arrangements for water drainage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1818—Arrangement or mounting of electric heating means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H2250/00—Electrical heat generating means
- F24H2250/02—Resistances
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Abstract
The invention discloses a fan-free solid heat storage electric boiler which comprises a boiler shell, a heat storage part and a heat release part, wherein the heat storage part comprises a heat storage body, a fireproof support structure and a heating device; the lower part of the heat accumulator is provided with a fireproof support structure, and a heating device is arranged in the heat accumulator; the heat release part comprises a heating surface, an upper header, a lower header, a water inlet pipe and a water outlet pipe; the water outlet pipe and the water inlet pipe are respectively positioned at the top and the bottom of the electric boiler; the water inlet pipe is connected with a plurality of lower header boxes, and the lower header boxes are vertical to the extension direction of the water inlet pipe and parallel to the bottom surface of the electric boiler; the water outlet pipe is connected with a plurality of upper header tanks, and the upper header tanks are vertical to the extending direction of the water outlet pipe and parallel to the bottom surface of the electric boiler; a heating surface is vertically connected between the upper header and the lower header, and a row of heat accumulators are arranged on both sides of the heating surface. The invention not only carries out targeted optimization and solution to the defects of the fan type boiler, but also optimizes the internal structure of the fan-free solid heat storage boiler, has safe operation and good application prospect.
Description
Technical Field
The invention belongs to the technical field of heating equipment, and particularly relates to a fan-free solid heat storage electric boiler.
Background
The electric boiler using solid heat storage popularized at present in China is a heating device mainly using magnesia bricks for heat storage and using air as a heat energy transmission medium. The heat storage device adopted by the solid heat storage electric boiler is made of magnesia bricks, namely the magnesia bricks in the heat insulation shell are heated by electric energy, a plurality of longitudinal and transverse through holes are arranged on the whole heat storage device, when the heat storage device is needed, a fan is used for driving air in the holes of the solid heat storage bricks to flow, the air is used for taking away heat in the solid heat storage bricks, and then the heat is transferred to heat supply circulating water in the air/water heat exchanger.
The structure mode of using air as intermediate medium to carry heat drives the air to circulate in the air through the fan to take away heat, and the heat stored in the solid heat storage bricks can be taken away more uniformly and transferred to a heating system. However, this heat exchange method has some disadvantages: 1. in the heat transfer process, the specific heat capacity of air is very small, about a quarter of the specific heat capacity of water, so that a good heat exchange effect is achieved, a large air flow is needed, the power of a fan is in direct proportion to the air volume, and a high-power variable-frequency fan needs to be equipped under the working environment, so that the transfer cost is very high. 2. The greater the flow, the less efficient the same fan, and the less efficient the overall boiler. 3. In order to make the heat of the heat storage brick uniformly radiate, a plurality of longitudinal and transverse through holes are required to be arranged on the heat storage body to be used as air channels, the air channels are required to be arranged below and around the heat storage body, the whole volume of the boiler is enlarged by the arrangement mode, and meanwhile, the occupied area is large.
Therefore, due to the use of the fan, the solid heat storage electric boiler has a series of problems needing improvement, so that the use of the fan is eliminated, and the heat storage brick and a hot water pipeline are used for directly exchanging heat, thereby improving the research schedule in the field of solid heat storage heating equipment.
Disclosure of Invention
The invention provides a solid heat storage electric boiler without a fan, aiming at solving the problems of higher operation cost and large occupied area of the solid heat storage electric boiler caused by the use of the fan in the prior art.
The invention is realized according to the following technical scheme:
a solid heat-accumulating electric boiler without blower is composed of casing, heat accumulating unit and heat releasing unit,
the heat storage part comprises a heat storage body, a fireproof support structure and a heating device; a fireproof support structure is arranged at the lower part of the heat accumulator, and a heating device is arranged in the heat accumulator;
the heat release part comprises a heating surface, an upper header, a lower header, a water inlet pipe, a water outlet pipe, a pressure gauge, a thermometer, an atmosphere communicating pipe and a water drain valve; the water outlet pipe and the water inlet pipe are respectively positioned at the top and the bottom of the electric boiler; the water inlet pipe is connected with a plurality of lower collecting boxes, and the lower collecting boxes are perpendicular to the extending direction of the water inlet pipe and parallel to the bottom surface of the electric boiler; the water outlet pipe is connected with a plurality of upper header tanks, and the upper header tanks are vertical to the extending direction of the water outlet pipe and parallel to the bottom surface of the electric boiler; a heating surface is vertically connected between the upper header and the lower header which are opposite, and both sides of the heating surface are provided with a row of heat accumulators which are arranged in parallel with the heating surface.
Further, the heating device is a heating plate or a heating wire.
Furthermore, the heat accumulator is in a wall shape built by heat accumulation bricks, is arranged on two sides of the heating surface in parallel and is not in direct contact with the heating surface.
Furthermore, the water outlet pipe and the water inlet pipe are both positioned on one side of the heat accumulator and are positioned on the same plane in the vertical direction.
Furthermore, the heating surface is formed by connecting a plurality of pipelines in parallel.
Furthermore, the lower header and the upper header are respectively positioned below and above the heated surface, and the lower header and the upper header are positioned on the same plane in the vertical direction.
Further, an atmosphere communicating port, a thermometer interface and a pressure gauge interface are further arranged on the water outlet pipe and are respectively connected with an atmosphere communicating pipe, a thermometer and a pressure gauge.
Further, the atmosphere communicating port is located at the highest position of the water outlet pipe.
Furthermore, a water outlet is formed in the bottom of the electric boiler, and a water outlet valve is arranged on the water outlet.
Furthermore, the water inlet of the water inlet pipe and the water outlet of the water outlet pipe are located on the same side.
The invention has the advantages and beneficial effects that:
the invention carries out targeted optimization on the problems of large occupied area and high operating cost of the solid heat storage electric boiler adopting the fan as the heat exchange medium.
(1) The invention can realize the direct heat exchange between the hot water pipeline and the heat accumulator under the condition that no fan is used as a heat transmission medium, and obtains better heat exchange effect. Because the air duct is not arranged, compared with a fan type solid heat storage electric boiler, the structure is compact, the volume can be greatly reduced, and the occupied area is small.
(2) The boiler adopts a forced heat exchange mode, a fan is replaced by a water pump, the specific heat capacity of water is about 1/3 of air, the energy consumption of the water pump/the fan is in direct proportion to the flow, the energy consumption of about 2/3 can be saved, and therefore the operating cost can be greatly reduced.
(3) The heating wire of the traditional solid heat storage boiler is contacted with air, and the air is possibly punctured under the high-pressure working environment, so that the heating system is short-circuited. Aiming at the problem, the heating wire is built in the heat accumulator and is not in direct contact with air, so that the problem of air breakdown can be avoided.
The invention ensures the good and safe operation of the fan-free boiler.
(1) When the internal heating surface of the boiler is designed, according to the principle of supply and demand balance, the heat exchange quantity between the heat accumulator and the heating surface is controlled by controlling the pipe diameter of the heating surface, the length of the heated part and the number of parallel pipelines, so that the heat exchange quantity between the heat accumulator and the heating surface is equal to the heat absorption quantity required by the temperature rise of circulating water in the heating surface from the inlet temperature to the rated outlet temperature (the temperature is lower than the saturation temperature under the corresponding pressure).
And secondly, as a guarantee measure under the unexpected condition, an atmosphere communicating pipe is arranged at the highest position of the boiler, and a circulating water system of the boiler is set to be a normal pressure system.
The design mode can ensure that the temperature of the water at the outlet reaches the use requirement and basically ensure that the circulating water in the boiler cannot be vaporized.
(2) In the form of a boiler, a forced circulation mode is adopted, and the lift of a water pump meets the total resistance of the most unfavorable pipeline in the selection of the water pump. Secondly, the connection mode of the water inlet and outlet pipes and the header adopts the structural mode that the port for circulating water to enter and the port for circulating water to flow out are on the same side, namely, the connection of the water inlet and outlet pipes and the connection of the upper header and the lower header all adopt U-shaped structures, and compared with the z-shaped structures that the port for circulating water to flow in and the port for circulating water to flow out are respectively on two sides, the U-shaped structures are favorable for reducing the nonuniformity of distribution.
The design mode can reduce the flow deviation of the parallel pipelines and reduce the operation hazard caused by the flow deviation.
Drawings
FIG. 1 is a top cross-sectional view of a fanless solid heat storage electric boiler of the present invention;
FIG. 2 is a front sectional view of the solid heat-accumulating electric boiler without fans of the present invention;
FIG. 3 is a left side view of a heated surface arrangement of the present invention;
FIG. 4 is a top cross-sectional view of the thermal mass and heating apparatus of the present invention;
FIG. 5 is a front cross-sectional view of the heat accumulator and its heating apparatus of the present invention;
FIG. 6 is a left side cross-sectional view of the heat accumulator and its heating apparatus of the present invention;
FIG. 7 is a schematic diagram of the heat exchange between the heat accumulator of the present invention and a heated surface;
FIG. 8 is a schematic view of a Z-connection of the header;
fig. 9 is a schematic view of the U-shaped connection of the header of the present invention.
Wherein, 1-boiler shell; 2-a heat accumulator; 3-a refractory support structure; 4-a heating device; 5-a water inlet; 6-water inlet pipe; 7-lower header; 8-heating surface; 9-upper header; 10-water outlet pipe; 11-a water outlet; 12-atmospheric communication port; 13-thermometer interface; 14-pressure gauge interface; and 15-a water drainage opening.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
As shown in the following figures 1-9, the heat accumulation system boiler system can be divided into two parts of heat accumulation and heat release, which are independent from each other and have high safety factor.
The basic construction of the boiler comprises a heat accumulator 2, heating material, a refractory support structure 3 and insulation material, and is an independent heat accumulation system. The heat accumulator 2 is built into a wall-like shape by heat accumulation bricks, is arranged on two sides of the heated surface 8 in parallel and is not in direct contact with the heated surface 8, a fireproof and insulating supporting device is arranged at the lower part of the heat accumulator to support the heat accumulator, and heating devices such as a heating plate or a heating wire are arranged in the heat accumulator 2 to heat the heat accumulator 2. The heating system is directly connected to the heat accumulator 2 by using 10-110kV high-voltage electricity, generates heat by adopting a resistance heating principle, transfers the heat in a heat conduction mode and stores the heat in a heat storage material, wherein the energy storage temperature can reach 800 ℃, and the process is the heat storage process of the heat accumulator 2.
The heat release system comprises a heating surface 8, an upper header 9, a lower header 7, a water inlet pipe 6, a water outlet pipe 10, a pressure gauge, a thermometer, an atmosphere communicating pipe, a safety valve, a water drain valve and the like. The heat release system adopts the longitudinal symmetry structure, and inlet tube 6 and outlet pipe 10 are located heat accumulator 2 one side, are located the coplanar in vertical direction, and inlet tube 6 is located the boiler lower extreme, and outlet pipe 10 is located the boiler highest point. The lower header 7 and the upper header 9 are respectively positioned below and above the heated surface 8 and are also positioned on the same plane in the vertical direction, the heated surface 8 is vertically connected between the upper header and the lower header, the heated surface 8 is formed by connecting a plurality of pipelines in parallel, the inlet of the lower header 7 is connected to the water inlet pipe 6, and the outlet of the upper header 9 is connected to the water outlet pipe 10.
A row of heat accumulators 2 are arranged on both sides of each row of heating surface 8 in parallel to release heat to the rows of heat accumulators, and the heat accumulators 2 are not in direct contact with the heating surface 8.
The highest position of the boiler water outlet pipe 10 is provided with an atmosphere communicating port 12 so as to timely remove gas generated by vaporization of water in the boiler and prevent the boiler from being damaged by overpressure.
A pressure gauge borrowing port 14 and a temperature gauge interface 13 are formed in a boiler water outlet 10 pipe, so that a corresponding instrument can be installed when the boiler operates, and the operation condition of the boiler can be monitored in real time.
The lowest part of the boiler is provided with a water discharge opening 15, and circulating water in the boiler is discharged under the conditions of maintenance, shutdown of the boiler and the like.
The function and the working process of each part of the boiler are as follows:
in the working process of the boiler, the heat accumulator 2 is used as a heat source, when the temperature of the heat accumulator 2 reaches 200-.
The lower header 7 serves to distribute the flow and evenly distribute the flow in the inlet pipe 6 to the heated surface 8.
The upper header 9 plays a role in collecting, and collects the flow in the heating surface 8 to the water outlet pipe 10, and the upper header and the lower header do not participate in direct heat exchange.
The heating surface 8 is a main heat exchange structure which is provided with a plurality of parallel single pipelines, and the main heat exchange structure is mainly used for exchanging heat and heating with the heat accumulators 2 which are arranged on two sides of the heating surface in parallel, and then the circulating water flowing through the heating surface takes away the heat absorbed by the circulating water to heat and heat the circulating water.
Circulating water flows into a water inlet pipe 6 positioned at the lower part through a water inlet 5, further flows into a lower collecting box 7, is distributed to a heated surface 8 from the lower collecting box 7, flows through the heated surface 8 from bottom to top in the heated surface 8, absorbs heat in the flowing process, is heated, finally flows into high-temperature water at the upper end of the heated surface 8, flows into an upper collecting box 9 and is then sent out from a water outlet 11. Obviously, the circulating water is heated once, the feed water is respectively heated from the next flow to the top in a plurality of parallel single pipelines under the pressure head action of the water pump, and the feed water is heated into high-temperature water from low-temperature water, so that the circulating water is a typical once-through boiler.
The bottom-up circulation mode has the unique point that bubbles generated in the system can be discharged to the highest point along with water flow, otherwise, the bubbles are carried by the water flow to flow downwards, and if the water flow speed is low, the bubbles can be stagnated and gathered to form an air lock.
Set up atmosphere communicating pipe at the boiler top and play the effect that in time gets rid of gas and keep the boiler ordinary pressure, if the boiler takes place the vaporization, can in time discharge through atmosphere communicating pipe, avoid the boiler to produce the superpressure danger.
The main working steps of the invention are as follows:
the first step is as follows: calculating the length of the heated portion of the heated surface
The method comprises the steps of firstly collecting rated thermal power and rated inlet and outlet temperatures of a boiler, the temperature of a heat accumulator and the emissivity of the surface of the heat accumulator, calculating the radiant heat exchange quantity of the heat accumulator on a heating surface and the heat demand quantity of circulating water in the heating surface for heating from the inlet temperature to the outlet temperature, enabling the radiant heat exchange quantity and the heat demand quantity to be equal, obtaining a relational expression of the length of the heated part of the heating surface and the number of parallel pipelines, enabling the length of the heated part of the heating surface and the number of the parallel pipelines to be in inverse proportion, and.
Wherein:
A1＝2L(m+1)s
A2＝πdL·m
A1X1，2＝A2X2，1＝A2
finishing to obtain: length of heated portion of heated surface
In the formula sigma0-absolute blackbody radiation constant, σ 0 ═ 5.67 × 10-8W/(m2 · K4);
A2-heat exchange area of the heated surface, m2；
A1-heat transfer area of heat accumulator, m2；
X1，2The angular coefficient of surface 1 to surface 2, here the angular coefficient of the heat exchange surface of the regenerator to the heating surface;
ε1-emissivity of the surface of the thermal mass;
ε2-emissivity of the heated surface;
Twal-temperature of the surface of the thermal mass, K;
Tpi-the temperature of the heated surface, here calculated as the average of the heated surface inlet and outlet water temperatures, K.
d is the pipe diameter of the heating surface, m;
s is the spacing between parallel heating surface pipes, and m is 2.5 x d.
Since other quantities are known, the formula is actually the relationship between the length L of the heated portion of the heating surface and the number of parallel pipes:
L＝f(m，n)
the second step is that: calculate the pipe diameter of header and business turn over water pipe
In order to avoid water flow blockage, when the pipe diameter is selected, the flow velocity under the corresponding pipe diameter is calculated, the flow velocity of the water inlet pipe is not more than that of the lower collection box, and the flow velocity of the lower collection box is not more than that of the heating surface vertical pipe.
The third step: calculating the pipe diameter of an atmosphere communicating pipe
The atmosphere communicating pipe is additionally arranged at the highest point of the water outlet main pipe of the hot water boiler system, so that steam generated by vaporization can be timely removed, the vaporization degree in the system is relieved, and the probability of safety accidents such as water attack, overpressure and the like of the system is reduced.
The pipeline of the atmosphere communicating pipe must be large enough, and the pipe diameter of the atmosphere communicating pipe is calculated according to the following formula:
Dd＝20+88Q
dd is the equivalent diameter of the atmosphere communicating pipe, mm;
q-rated thermal power, MW, of the hot water boiler.
The fourth step: calculating the size of the Heat accumulator
The volume of the heat accumulator is related to the stored heat, and is calculated according to the time required for continuous heat release and the heat release temperature difference of the heat accumulator.
Q'＝cmΔt
Wherein:
m＝ρV
V＝bHx
finishing to obtain:
width of heat accumulator: b 2s (m +1)
Height of heat accumulator: h ═ L
Thickness of heat accumulator:
wherein Q' -the heat that the heat accumulator needs to store, J;
q-rated thermal power of the boiler, W;
τ — continuous heat release time of the heat accumulator, s;
m is the mass of the heat accumulator, kg;
n is the number of rows of heating surfaces;
rho-density of heat accumulator, kg/m3；
c-specific heat capacity of the heat accumulator, J/(kg. DEG C.);
v-volume of heat accumulator, m3；
x is the thickness of the heat accumulator, m.
Width of heat accumulator: b 2s (m +1)
Height of heat accumulator: h ═ L
The fifth step: calculating the thickness of the insulating layer
Because the heat storage temperature of the heat accumulator is higher and can reach about 800 ℃, the heat accumulator is used for preserving heat of the surface without heat exchange between the heat accumulator and the heated surface in order to prevent the heat accumulator from losing too much to the outside and causing low heat efficiency and prevent scalding. Therefore, a proper heat accumulator heat insulation material needs to be selected, so that the energy loss of the heat accumulator is reduced to the minimum, the efficiency of the boiler is improved to the maximum extent, meanwhile, the rationality of the external temperature of the boiler is ensured, and the safety is improved.
Under the condition of allowing heat dissipation loss, the thickness of the heat preservation layer is as follows:
in the formula twal-the temperature of the thermal mass, deg.c;
ta-temperature of the surrounding air, ° c;
lambda-thermal conductivity of the insulation material, W/(m)2·℃)；
h-heat convection coefficient between the surface of the insulation layer and the ambient air, W/(m)2·℃)；
q-heat dissipation, W/m2。
And a sixth step: hydrodynamic calculation
The mechanical flow boiler hydrodynamic calculation task is to calculate hydrodynamic characteristics and flow resistance in a boiler heating pipe and determine the pump lift by calculating the flow resistance.
When a single-phase fluid flows in the tube, the total pressure drop can be calculated by:
ΔP＝ΔPmc+ΔPjb±ΔPzw+ΔPjs
△ P in the formula is total pressure drop, Pa;
△Pmc-the frictional resistance of the single-phase fluid, Pa;
△Pjb-local resistance of the single-phase fluid, Pa;
△Pzw-the gravitational pressure drop, Pa, of the single-phase fluid; (the fluid is positive when rising and negative when falling)
△Pjs-the accelerated pressure drop, Pa, of the single-phase fluid.
Wherein:
v-integral average specific volume of fluid along the length of the tube, m3/kg；
Rho W is calculated, namely the mass flow rate of the working medium in the pipe is kg/(. square meter.s);
λ -coefficient of frictional resistance.
ξjbThe local resistance coefficient is obtained by experiments.
Wherein
Δh＝(hc-hj)
In the formula
-the arithmetic mean density of working medium inlet and outlet in the pipe, kg/m3；
△ h-height difference of inlet and outlet of pipe, m;
hc、hj-the height of the inlet and outlet of the tube, m, respectively.
Accelerated pressure drop △ P for boiler hydraulic calculations at low pressurejsThe losses are relatively small and therefore the acceleration drop is generally ignored in the calculation process. And selecting the water pump lift larger than the total pressure drop according to the calculated total pressure drop, so that the circulating water power of the boiler can be ensured.
When designing boilers with different thermal powers, designing and calculating according to new boiler parameters, and repeating the steps to obtain new design sizes of the boilers.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides a no fan formula solid heat accumulation electric boiler, includes boiler shell (1), heat accumulation portion and exothermic portion, its characterized in that:
the heat storage part comprises a heat storage body (2), a fireproof support structure (3) and a heating device (4); a fireproof support structure (3) is arranged at the lower part of the heat accumulator (2), and a heating device (4) is arranged in the heat accumulator (2);
the heat release part comprises a heating surface (8), an upper header (9), a lower header (7), a water inlet pipe (6), a water outlet pipe (10), a pressure gauge, a thermometer, an atmosphere communicating pipe and a water drain valve; the water outlet pipe (10) and the water inlet pipe (6) are respectively positioned at the top and the bottom of the electric boiler; the water inlet pipe (6) is connected with a plurality of lower collecting boxes (7), and the lower collecting boxes (7) are vertical to the extending direction of the water inlet pipe (6) and parallel to the bottom surface of the electric boiler; the water outlet pipe (10) is connected with a plurality of upper headers (9), and the upper headers (9) are vertical to the extending direction of the water outlet pipe (10) and parallel to the bottom surface of the electric boiler; a heating surface (8) is vertically connected between the upper header (9) and the lower header (7) which are opposite, and a row of heat accumulators (2) which are arranged in parallel with each other are arranged on both sides of the heating surface (8).
2. The solid heat storage electric boiler without fan according to claim 1, characterized in that the heating means (4) is a heating plate or a heating wire.
3. The solid heat-accumulating electric boiler without fans of claim 1, characterized in that the heat-accumulating bodies (2) are constructed in the shape of walls made of heat-accumulating bricks, arranged in parallel on both sides of the heated surface (8), and are not in direct contact with the heated surface (8).
4. A solid state heat-accumulating electric boiler without blower according to claim 1 characterized in that the outlet pipe (10) and the inlet pipe (6) are located on the heat accumulator (2) side and are vertically on the same plane.
5. The solid heat-accumulating electric boiler without blower according to claim 1 characterized in that the heating surface (8) is formed by connecting a plurality of pipes in parallel.
6. The solid heat-accumulating electric boiler without blower according to claim 1, characterized in that the lower header (7) and the upper header (9) are located below and above the heated surface (8), respectively, and the lower header (7) and the upper header (9) are located on the same plane in the vertical direction.
7. The solid heat-accumulating electric boiler without blower as claimed in claim 1, characterized in that the outlet pipe (10) is further provided with an atmosphere communicating port (12), a thermometer port (13) and a pressure gauge port (14) respectively connected to an atmosphere communicating pipe, a thermometer and a pressure gauge.
8. The solid heat-accumulating electric boiler without blower according to claim 7, characterized in that the atmosphere communication port (12) is located at the highest position of the water outlet pipe (10).
9. The solid heat-accumulating electric boiler without fans of claim 1, characterized in that the bottom of the electric boiler is provided with a drain opening (15), and a drain valve is arranged on the drain opening (15).
10. The solid heat-accumulating electric boiler without blower according to claim 1, characterized in that the inlet (5) of the inlet pipe (6) and the outlet (11) of the outlet pipe (10) are located on the same side.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112066553A (en) * | 2020-09-16 | 2020-12-11 | 河北建筑工程学院 | Solid electric heat accumulation boiler provided with heat exchange tubes |
| CN112856805A (en) * | 2021-01-18 | 2021-05-28 | 河北建筑工程学院 | Safe and efficient solid heat storage electric boiler with variable heat transfer surface |
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| CN112066553A (en) * | 2020-09-16 | 2020-12-11 | 河北建筑工程学院 | Solid electric heat accumulation boiler provided with heat exchange tubes |
| CN112856805A (en) * | 2021-01-18 | 2021-05-28 | 河北建筑工程学院 | Safe and efficient solid heat storage electric boiler with variable heat transfer surface |
| CN112856805B (en) * | 2021-01-18 | 2023-03-10 | 河北建筑工程学院 | Safe and efficient solid heat storage electric boiler with variable heat transfer surface |
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