Systems and methods for processing solid powders

1. A system for gasification of a solid powder, comprising:

one or more conveying tanks configured to receive a solid powder;

one or more solid pumps disposed downstream of and in communication with the one or more respective conveying tanks; and

a gasifier disposed downstream of and in fluid communication with the one or more solid pumps;

the system further comprising a buffer vessel comprising a cooling element, the buffer vessel disposed between and in fluid communication with the one or more solid pumps and the gasifier.

2. The system of claim 1 , wherein the one or more solid pumps are disposed below the one or more respective conveying tanks.

3. The system of claim 1 , further comprising a feeding apparatus disposed between and in fluid communication with the one or more solid pumps and the gasifier.

4. The system of claim 3 , wherein one or more of the one or more solid pumps and the feeding apparatus are disposed below the gasifier.

5. The system of claim 1 , wherein the buffer vessel is located above the gasifier.

6. The system of claim 1 , further comprising a buffer hopper disposed below and in fluid communication with the one or more solid pumps and the gasifier.

7. The system of claim 1 , wherein the one or more solid pumps are located above the gasifier.

8. The system of claim 1 , further comprising a milling apparatus, one or more gas-solid separators configured to convey the solid powder to the one or more respective conveying tanks and a storage tank in fluid communication with the milling apparatus and the one or more gas-solid separators.

9. A conveyance unit for conveying a solid powder for gasification, comprising:

one or more gas-solid separators configured to convey solid powder into one or more conveying tanks;

one or more conveying tanks configured to receive the solid powder from the one or more gas-solid separators;

one or more solid pumps disposed downstream of the one or more respective conveying tanks and configured to pressurize and convey the solid powder from the one or more respective conveying tanks for gasification;

a buffer hopper comprising a pressurizing gas inlet, the buffer hopper disposed below a gasifier and in fluid communication with the one or more solid pumps; and

a buffer vessel comprising a cooling element disposed downstream of the buffer hopper and in fluid communication with the buffer hopper and the gasifier.

10. The conveyance unit of claim 9 , further comprising a feeding apparatus disposed downstream of and in fluid communication with the one or more solid pumps.

11. A method for gasification of a solid powder, comprising:

introducing a solid powder into one or more conveying tanks;

introducing the solid powder from the one or more conveying tanks into one or more respective solid pumps disposed downstream of the one or more respective conveying tanks;

providing a buffer hopper comprising a pressurizing gas inlet to receive and convey the solid powder from the one or more solid pumps, wherein the buffer hopper is disposed below a gasifier;

providing a buffer vessel comprising a cooling element to receive and convey the solid powder from the buffer hopper into the gasifier, wherein the buffer vessel is disposed above the gasifier; and

pressurizing and conveying the solid powder into the gasifier.

12. A method of claim 11 , wherein the one or more solid pumps are located above the gasifier.

13. A method of claim 11 , further comprising providing a feeding apparatus to convey the solid powder from the one or more solid pumps into the gasifier.

14. A method of claim 11 , wherein the one or more solid pumps are located below the gasifier.