CN213630377U

CN213630377U - Small-size methyl alcohol once-through boiler mounting structure

Info

Publication number: CN213630377U
Application number: CN202022007233.8U
Authority: CN
Inventors: 吴占虎; 马军; 屈世存
Original assignee: Yulin Hydrocarbon Research Institute Co ltd
Current assignee: Yulin Hydrocarbon Research Institute Co ltd
Priority date: 2020-09-15
Filing date: 2020-09-15
Publication date: 2021-07-06
Anticipated expiration: 2030-09-15

Abstract

The utility model relates to a small-size methyl alcohol direct current boiler mounting structure, including inlet tube, outlet pipe, methyl alcohol storage tank, methyl alcohol day buffer tank, boiler chimney, the inlet tube passes through the pipe connection methyl alcohol direct current boiler and intakes, and the outlet pipe passes through the pipe connection methyl alcohol direct current boiler and goes out water, and the methyl alcohol storage tank passes through the fuel feed pipe and connects the day buffer tank of methyl alcohol, and methyl alcohol direct current boiler methyl alcohol combustor is connected to the day buffer tank of methyl alcohol, and the boiler chimney is connected methyl alcohol direct current boiler exhaust port. The application has compact structure, and ensures that the boiler is stable, safe, economic and reliable in the operation process.

Description

Small-size methyl alcohol once-through boiler mounting structure

Technical Field

The invention belongs to the field of boiler installation and construction, and particularly relates to an installation structure of a small methanol once-through boiler.

Background

The methanol once-through boiler is a boiler which generates steam or hot water with rated parameters by the pressure of a feed water pump when the feed water passes through a heating surface once. The once-through boiler has no boiler barrel, no steam drum is needed, the pipe diameter of the heating surface is very small, the total weight of the pressure-bearing part is light, and steel can be saved by 30-50%. The small once-through boiler can be divided into a single-tube type and a multi-tube type in structure, and actually, a multi-tube type structure is generally adopted. The multi-pipe small-sized once-through boiler is generally provided with an annular header at the upper part and an annular header at the lower part, and a pipe bundle and an evaporation pipe bundle are vertically arranged between the two headers. The water pipes are generally arranged into a plurality of circles, and the cylindrical part enclosed by the inner circles is a combustion chamber (hearth). Because the combustion gas flows in a W shape between the two circles of heating water pipes, the inner and outer circles of pipe bundles are both heating pipes. The water flows from bottom to top in the heating pipe and finally becomes hot water or steam. Feed water enters from the lower header by a feed pump, rises and evaporates after being heated in the heating pipe, and enters the upper header. The incompletely evaporated saturated water falls back into the heating pipe due to gravity and is heated again, the steam enters the steam-water separator from the upper header, is separated in the steam-water separator to become dry steam, and the water returns to the lower header from the downcomer. The burner is arranged at the upper part of the boiler, the nozzle is arranged downwards, and the radiant heat generated by combustion carries out radiant heat exchange with the inner ring and carries out convective heat exchange with the tube bundle when entering the channel between the inner ring and the outer ring. The flue gas after heat exchange is discharged to the atmosphere through a chimney. The principle of the single-pipe once-through boiler is the same as that of the multi-pipe once-through boiler, and the structure of the single-pipe once-through boiler is similar to that of the multi-pipe once-through boiler. The structure is similar to that of a household wall-mounted boiler and a water heater, a single coil pipe is spirally wound into two concentric cylinder bodies with different diameters, the cylinder wall is composed of the coil pipes, the inward side of the coil pipe of the inner cylinder is a radiation heating surface, and the rest are convection heating surfaces. The small-capacity once-through boiler mostly adopts a single pipe type.

The small methanol once-through boiler has the main advantages of small water capacity, high starting and temperature rising speed, compact structure, small occupied area and convenient installation. The heating surface is designed uniquely, the effective heat exchange area is large, the exhaust gas temperature is low, and the heat efficiency is high. The heating surface of the coil pipe can expand freely, the thermal stress caused by boiler starting, boiler shutdown and the like can be greatly reduced, and the safety is good. Is particularly suitable for middle and small enterprises, facility agriculture, agricultural product processing, businesses, institutions and schools. Because the methanol fuel is liquid fuel, the methanol fuel is safer in use, cleaner and more environment-friendly than gaseous fuel, and is convenient to store, transport and use. It is particularly suited to distributed thermal energy technology. The distributed heat energy technology can accurately match the heat equipment for use, and the optimal energy-saving effect is achieved.

Disclosure of Invention

The invention mainly aims at the installation problem in the application process of the prior small methanol once-through boiler, and provides an effective and cost-saving methanol once-through boiler installation structure.

The technical scheme provided by the application is as follows:

the utility model provides a small-size methyl alcohol direct current boiler mounting structure, includes the inlet tube, the outlet pipe, the methyl alcohol storage tank, methyl alcohol day-used buffer tank, boiler chimney, the inlet tube passes through the pipe connection methyl alcohol direct current boiler and intakes, and the inlet tube is equipped with thermometer, moisturizing case, drain, multistage tubing pump along the direction of intaking in proper order, the moisturizing case is through moisturizing union coupling water softening device. The water outlet pipe is connected with the water outlet of the methanol once-through boiler through a pipeline, and the water outlet pipe is sequentially provided with a flowmeter and a pressure gauge along the water outlet direction. The methanol storage tank is connected with a daily methanol buffer tank through a fuel liquid supply pipe, a methanol fuel pump and a valve are sequentially arranged on the fuel liquid supply pipe between the methanol storage tank and the daily methanol buffer tank along the fuel supply direction, and the methanol fuel is pumped into the daily methanol buffer tank from the methanol storage tank; the daily buffer tank of methyl alcohol flows to the methyl alcohol combustor through supplying liquid pipeline automatically, and methyl alcohol combustor import department is equipped with the stainless steel filter, and methyl alcohol boiler chimney is connected methyl alcohol once-through boiler exhaust port, discharges the flue gas in the atmosphere.

In a preferred embodiment of the invention, the height of the water replenishing tank is more than 1.6m from the water outlet, the top of the water replenishing tank is open, the pressure difference is ensured, and the pressure in a water heating pipeline is buffered in the operation process.

In a preferred embodiment of the invention, the boiler feed water is provided with a softened water filtering device, and after the softened water is treated by the softened water filtering device, the water quality reaches the hardness of less than or equal to 0.04mmol/L, pH (25 ℃) of 9.0-11.0, the dissolved oxygen of less than or equal to 0.10mg/L and the dissolved solid of less than or equal to 4.0 multiplied by 10³And mg/L.

In a preferred embodiment of the invention, the methanol supply pipeline has a certain gradient, the gradient is determined by the positions of the storage tank and the burner in the actual installation process, and the principle is to ensure that the fuel liquid level is higher than the fuel inlet of the once-through boiler, and no liquid loading and no residue exist in the pipeline.

In a preferred embodiment of the invention, the installation structure of the small methanol once-through boiler is characterized in that a stainless steel filter is installed at the inlet of a burner to filter residues in methanol fuel and prevent an electromagnetic pump of the burner from being blocked.

In a preferred embodiment of the invention, the filter is selected by calculating the effective filtering area through the diameter of the pipeline and selecting the effective filtering area to the sectional area of the pipeline with the ratio not less than 1.2.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings

FIG. 1 is a schematic illustration of the installation of a preferred embodiment of the present invention;

description of reference numerals: 1. the device comprises a water inlet pipe, 2, a water outlet pipe, 3, a water supplementing pipe, 4, a fuel liquid supply pipe, 5, a methanol storage tank, 6, a methanol daily buffer tank, 7, a methanol direct-flow boiler, 8, a water supplementing tank, 9, a multistage pipeline pump, 10, a boiler chimney, 11, a methanol burner, 12, a pressure gauge, 13, a flow meter, 14, a thermometer, 15, a sewage outlet, 16, a boiler foundation, 17, a filter, 18, a valve, 19, a methanol fuel pump, 20 and a softened water device.

Detailed Description

The present invention will now be described in further detail with reference to the accompanying drawings and examples, which are simplified schematic drawings illustrating only the basic structure of the present invention in a schematic manner, and thus showing only the constitution related to the present invention.

The utility model provides a small-size methyl alcohol direct current boiler mounting structure, includes inlet tube (1), outlet pipe (2), methyl alcohol storage tank (5), methyl alcohol day-used buffer tank (6), boiler chimney (10), inlet tube (1) is intake through the pipe connection methyl alcohol direct current boiler, and inlet tube (1) is equipped with thermometer (14), moisturizing case (8), drain (15) along the direction of intaking in proper order, multistage pipeline pump (9), moisturizing case (8) are through moisturizing pipe (3) connection demineralized water device (20). The water outlet pipe (2) is connected with the water outlet of the methanol direct-flow boiler (7) through a pipeline, and a flowmeter (13) and a pressure gauge (12) are sequentially arranged on the water outlet pipe (2) along the water outlet direction. The methanol storage tank (5) is connected with a daily methanol buffer tank (6) through a fuel supply pipe (4), the fuel supply pipe (4) between the methanol storage tank (5) and the daily methanol buffer tank (6) is sequentially provided with a methanol fuel pump (19) and a valve (18) along the fuel supply direction, and the methanol fuel is pumped into the daily methanol buffer tank (6) from the methanol storage tank (5); the methanol daily buffer tank (6) automatically flows to the methanol burner (11) through the fuel liquid supply pipe (4), a stainless steel filter (17) is arranged at the fuel inlet of the methanol burner (11), and a methanol boiler chimney (10) is connected with a smoke outlet of the methanol direct-flow boiler (7) and discharges smoke into the atmosphere.

As shown in FIG. 1, the application process of the small methanol once-through boiler installation structure comprises the following steps:

(1) preparation work is required before construction and installation, boiler installation quality is guaranteed, installation period is shortened, construction cost is reduced, and the boiler can be put into service and safely operated as soon as possible. Installation construction drawings are seriously reviewed, and raw materials, semi-finished products, structural parts, construction machinery, equipment and the like are strictly checked. The inspection method has the advantages that the inspection method needs to carefully participate in unpacking and acceptance inspection work of equipment and materials, the inspected products need to be identified by a certificate and technical specifications according to construction specification, important parts need to be re-inspected, and the inspected products can be used after being qualified, so that the adverse phenomena of equipment machines and tools, worker shrinkage and the like caused by the pause of installation work due to the defects or parts shortage of construction equipment and materials are avoided.

(2) And (6) field exploration. Before installation, the condition and the installation environment of an installation site need to be observed, and the road traffic, the equipment loading and unloading, the installation position, the reserved space, the positions of the bracket and the embedded part need to be verified, so that the device is prepared in advance for next approach construction and installation.

(3) Manufacturing a foundation 16 of the boiler 7 and the storage tank 5, embedding anchor bolts, checking the size of the foundation according to the size of equipment, controlling the size error in a required range, and keeping a safe distance between the boiler 7 and the storage tank 5. The methanol storage tank 5 is buried underground or installed in a safe position according to the requirements of the building design fire protection code GB 50016, the material is generally required to be a double-layer stainless steel tank, and a carbon steel tank (the thickness is more than 3 mm) can be used for reducing the cost.

(4) A water heating system is installed, a water inlet pipe 1 is pressurized through a multistage pipeline pump 9 to enable water to be heated to a water outlet pipe 2 through a direct-current pot body, heating equipment (mainly a radiator) is arranged between the water inlet pipe and the water outlet pipe, a softened water filtering device 20 and a water supplementing tank 8 are installed at the position of the water inlet pipe 1, the height of the water supplementing tank 8 is more than 1.5m of the water outlet pipe, the top of the water supplementing tank is open, pressure difference is guaranteed, water is supplemented in the operation process, and the pressure in the water;

(5) a methanol fuel liquid supply system is installed, methanol fuel enters a methanol daily buffer tank 6 from a methanol storage tank 5 through a methanol fuel pump 19 and is automatically conveyed to a burner 11 through pressure difference, a methanol liquid supply pipeline 4 has a certain gradient, the gradient is determined by the positions of the storage tank 5 and the burner 11 in the actual installation process, the principle is that the liquid level of the fuel is higher than that of a fuel inlet of a direct-flow boiler 7, no liquid loading and no residue exist in the pipeline;

(6) installing a boiler chimney 10, wherein the height of the chimney 10 is selected according to the whole position of a boiler room, the tightness of a flue is ensured by an asbestos rope at a connecting surface, in order to ensure the negative pressure of a hearth, the height of the chimney 10 is more than 3m, and a sampling port is arranged at 1m of the chimney to facilitate the detection of smoke exhaust gas;

(7) the boiler 7 and the storage tank 5 are grounded, the storage tank 5 is required to be provided with a breather valve, a liquid level meter, a leakage detection alarm instrument and the like (not shown in the figure), the inlet of the combustor 11 is provided with a stainless steel filter 17 for filtering residues in methanol fuel and preventing an electromagnetic pump of the combustor 11 from being blocked, the model selection of the filter 17 calculates the effective filtering area through the diameter of a pipeline, and the selection is carried out by taking the method that the ratio of the effective filtering area to the sectional area of the pipeline is not less than 1.2;

(8) a direct-current boiler control cabinet is arranged and hung on one side close to a door to conveniently control starting and stopping;

(9) the waste pipe 15 is connected to a waste tank or other safety place and the pipe must be firmly fixed to prevent displacement during waste discharge.

(10) The methanol once-through boiler 7 was subjected to trial operation and acceptance.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that various changes and modifications may be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims

1. The utility model provides a small-size methyl alcohol once-through boiler mounting structure, includes inlet tube (1), outlet pipe (2), methyl alcohol storage tank (5), methyl alcohol day-use buffer tank (6), boiler chimney (10), its characterized in that: the methanol direct-flow boiler is characterized in that a water inlet pipe (1) is connected with a methanol direct-flow boiler (7) through a pipeline to feed water, a water outlet pipe (2) is connected with the methanol direct-flow boiler (7) through a pipeline to discharge water, a methanol storage tank (5) is connected with a methanol daily buffer tank (6) through a fuel liquid supply pipe (4), the methanol daily buffer tank (6) automatically flows through the fuel liquid supply pipe (4) to convey methanol fuel to a methanol burner (11), and a boiler chimney (10) is connected with a smoke exhaust port of the methanol direct-flow boiler (7.

2. The small methanol once-through boiler mounting structure according to claim 1, wherein the water inlet pipe (1) is sequentially provided with a thermometer (14), a water replenishing tank (8), a sewage discharge outlet (15) and a multistage pipeline pump (9) along a water inlet direction, and the water replenishing tank (8) is connected with a water softening device (20) through a water replenishing pipe (3).

3. The small methanol once-through boiler mounting structure according to claim 1, wherein the outlet pipe (2) is provided with a flow meter (13) and a pressure gauge (12) in sequence along the outlet direction.

4. The small methanol once-through boiler installation structure according to claim 1, wherein a methanol fuel pump (19) and a valve (18) are sequentially arranged in a fuel supply pipe (4) between the methanol storage tank (5) and the methanol day buffer tank (6) along a fuel supply direction.

5. The small methanol once-through boiler installation structure as set forth in claim 1, wherein a stainless steel filter (17) is installed at an inlet of the burner (11) to filter the residue in the methanol fuel.

6. The small methanol once-through boiler installation structure according to claim 1, characterized in that the methanol storage tank (5) is provided with a breather valve, a liquid level meter and a leakage detection alarm.