HP 18 Specifications. Water-tube vertical boilers
- - the vertical arrangement of the pipes of a small diameter (with this location in the pipes of deposits is significantly less than when horizontal).
- - Water-tube shielding of the furnace chamber reduces, compared with horizontal-water-tube boilers, specific material intensity.
Vertically water-tube water boilers are boilers of the heating class. These include:
- - steel sectional boilers types "HP" (Fig. 3.33), "NIIS", "ZIO", etc.;
- - steel monoblock boilers types "KVA" (Fig. 3.34), "KV-G", "TVG", etc.
Assembly of section boilers are produced at the place. The monoblock is supplied with the form of use ready for operation. The technical characteristics of vertically water-tube water boilers are shown in Table. 3.15-3.18.
Fig. 3.33. Vertical-water-tube water heating boiler HP-18 (steel sectional):1 - hatch cover for cleaning; 2 - a firewall made of refractory brick; 3 - pipe section; 4 - gas duct.
Steel section boilers work under the discharge due to the natural thrust created by the chimney.
Steel section boilers are designed to heat water to a temperature not higher than 115 0s. The NP-18 boiler sections are welded from three pipes D 89 mm (vertically installed pipes. 3.33) and one pipe D 108 mm (collector), in which the vertical pipes are installed at the top and bottom. The inner series of pipes are separated from the other two rows by a vertical partition from a refractory brick forming radiation (side screens) and a convective part of the boiler. From the furnace, high-temperature combustion products through the opening are flowed into the convective part of the boiler. Running down along the convective part, combustion products enter the gas - 4. From the gas cooled, cooled combustion products go to the smoke tube. Steel sectional boilers operate on solid, liquid and gaseous types of fuels.
Table 3.15. Specifications of vertically-water-tube water boilers of brands: "HP", "Nadilla", "NIIS" (steel sectional).| Type of boiler | Number of sections | Surface area of \u200b\u200bheating, m 2 | Specific heat removal, mcal / (m 2 × h) | Gas consumption, m 3 / h | ||
| boiler | middle section | front section | ||||
| HP-17. | 24 | 40 | 1,67 | - | 10 | 59 |
| NR-18. | 16-32 | 27-53 | 1,67 | - | 10 | 38 |
| NR-18m. | - | 74 | - | - | 16 | 163 |
| "Nadashia" | 3-6 | 20-47 | 9 | 2 | 12 | 34-80 |
| "NIISU-5" | 4-7 | 25-46 | 7,1 | 5,5 | 12 | 42-78 |
The efficiency of these boilers is within 80-85%
Table 3.16. Specifications of vertically-water-tube water boilers Zo-mg brand.
Fig. 3.34. Vertical Water-tube Water Heat Copper - KVA (Monoblock)
1 - boiler housing; 2 - ambrusura; 3 - the box of the gas plant; 4 - burner; 5 - Pipe system.
Boilers "KVA" types, "KV-G", "TVG" work under excess pressure. Create an overpressure of air supplied by the blast fan, and the fuel coming into the fuel burner. In the burner there is a mixture of fuel and air and the entire fuel tract works under the superior. The furnaces of these boilers are formed by the inner walls of the pipe system of the boilers. The gas discovery of the furnace chambers is provided by the welded membranes installed in the gaps between the pipes. The pipe system is designed to heal water and organizing the movement of combustion products in the interlock space (flow around the heat transfer surface). The pipe system forms the radiation-screen and convective part of the boiler. The pipe system consists of two ring collectors interconnected by straight vertical pipes located in several concentric circles in a checker order. The upper and lower collectors have stamped pipe grilles to which pipes are welded. Ring collectors are usually closed with removable lids.
Table 3.17. Specifications of vertically-water water-tube boilers "KVA" (monoblock).| Name of parameter | KVA-0.4 / 95 | Kva -1,0 / 95 |
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The disadvantages of monoblock boilers include high stresses of thermophysical and thermal nature, arising in inter-tube membranes. In order to maintain gas content for boilers of this type, non-stop operation mode is preferred.
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