BOILER

Claims

1. A boiler containing firebox, convective part and collectors for coolant; the said convective part contains, at least one block of, at least two batteries consisting of identical, at least partially finned steel coils, the mentioned coils contain distal and proximal ends connected to the said collectors, as well as, at least two U-shaped bends, wherein adjacent U-shaped bends are connected to each other by smooth pipes; the coils in the said batteries are arranged in rows parallel to each other in such a way that in the first of the said at least two oppositely located batteries the said smooth pipes are located on one side of the said convective part, and the bends of the U-shaped elbows are closer to the opposite side of the said convective part, and in the second of the said at least two oppositely located batteries the said smooth pipes are located on that side of the said convective part, near which the bends of the U-shaped elbows of the first of the said batteries are located, and the bends of the U-shaped elbows of the second battery are located closer to that side of the said convective part, on which the smooth pipes of the said first battery are located, wherein the U-shaped elbows of the coils of the said first battery are placed in mutually parallel planes with an offset relative to the U-shaped elbows of the coils of the said second battery in such a way,that the said U-shaped knees of the said first battery are arranged in a staggered manner relative to the U-shaped knees of the said second battery; the longitudinal gaps between the said smooth pipes of the adjacent coils of each of the said at least two batteries are closed with membranes; The transverse slits between the distal and proximal ends of the U-shaped elbows are closed with lids.

2. The boiler according to claim 1, wherein the above-mentioned coils are made substantially flat.

3. The boiler according to item 1, in which in each of the above-mentioned batteries the distal and proximal sections of the pipes of the first in order from the distal end of the coils of the U-shaped elbows are located in mutually parallel planes, the distal and proximal sections of the pipes of the second in order from the distal end of the coils of the U-shaped elbows, and so on up to the distal and proximal sections of the pipes of the last in order from the distal end of the coils of the U-shaped elbows are located in mutually parallel planes.

4. The boiler according to claim 1, in which the above-mentioned finning is made by welding a steel strip to a smooth steel pipe in a spiral.

5. The boiler according to claim 1, wherein the above-mentioned convective part comprises at least two of the above-mentioned blocks arranged in series or parallel to the flow of combustion products.

6. A boiler according to claim 1, in which partitions are installed in the gaps between the distal and proximal sections of the U-shaped elbows of one battery, designed in such a way as to ensure the passage of combustion products along a zigzag trajectory.

7. The boiler according to claim 1, wherein the above-mentioned convective part is located on the same axis as the above-mentioned combustion part.

8. The boiler according to claim 1, wherein said convective part is located at an angle to said combustion part.

9. The boiler according to claim 1, wherein said convective part is located substantially at right angles to said combustion part.

10. A boiler according to any one of paragraphs 1-9, in which the said combustion part is located below the said convective part.

11. A boiler according to any one of paragraphs 1-9, in which the said combustion part is located above the said convective part.

12. A boiler according to any one of paragraphs 1-9, in which the said combustion part is located at the same level relative to the said convective part.

13. The boiler according to item 1, in which at least two of the above-mentioned collectors are provided with partitions for changing the direction of movement of the coolant.