Solid-liquid separation device

Patent metadata

Field	Value
Publication number	US-2018001226-A1
Application number	US-201515537691-A
Country	US
Kind code	A1
Filing date	Jan 23, 2015
Priority date	Jan 23, 2015
Publication date	Jan 4, 2018
Grant date	—

Abstract

A solid-liquid separation device performs dehydration or deoiling from a treated object using a substance A that is a gas at normal temperature and pressure and is capable of dissolving water and oil when liquefied. The separation device includes a substance B that circulates while generating phase change in a closed system, a compressor that compresses the substance B, a first heat exchanger that condenses substance B and evaporates of the substance A, an expansion valve that decompresses the condensed substance B, a second heat exchanger that evaporates substance B and condenses substance A, and a treatment tank wherein substance A is mixed with the treated object, substance A is evaporated while separated from the liquid in the first heat exchanger, and condensed in the second heat exchanger. The center of gravity of the first heat exchanger is lower than the second heat exchanger in a vertical direction.

First claim

1 . A solid-liquid separation device that performs dehydration or deoiling from an object to be treated that is a mixture of water and a solid, a mixture of oil and a solid, or a mixture of water, oil, and a solid, as the object to be treated, using a substance A capable of dissolving water and oil, the solid-liquid separation device comprising:
a substance B that is circulated while generating phase change in a closed system; a compressor that compresses the substance B; a first heat exchanger that exchanges heat of condensation of the substance B and heat of evaporation of the substance A; expansion means that decompresses the condensed substance B; a second heat exchanger that exchanges heat of evaporation of the substance B and heat of condensation of the substance A; and a treatment tank in which the substance A is mixed with the object to be treated, the substance A having been evaporated while separated from the water or the oil in the first heat exchanger, and condensed in the second heat exchanger, wherein a center of gravity of the first heat exchanger is installed in a lower portion than a center of gravity of the second heat exchanger in a vertical direction.

2 . The solid-liquid separation device according to claim 1 , wherein
a flow path of the substance B is installed below a liquid level of the substance A in the first heat exchanger.

3 . The solid-liquid separation device according to claim 1 , wherein
a flow path of the substance B is installed above a liquid level of the substance A in the second heat exchanger.

4 . The solid-liquid separation device according to claim 1 , wherein
a gas-liquid separator is installed in an upper portion of the first heat exchanger and downstream of a flow path of the substance A.

5 . The solid-liquid separation device according to claim 1 , wherein
a gas-liquid separator is installed in a lower portion of the second heat exchanger and downstream of a flow path of the substance A.

6 . The solid-liquid separation device according to claim 1 , wherein
a liquid feed pump for the substance A is installed in a lower portion of the first heat exchanger and the second heat exchanger in the vertical direction.

7 . A solid-liquid separation method of performing dehydration or deoiling from an object to be treated that is a mixture of water and a solid, a mixture of oil and a solid, or a mixture of water, oil, and a solid, as the object to be treated, using a substance A capable of dissolving water and oil, the solid-liquid separation method comprising:
a substance B that is circulated while generating phase change in a closed system; compressing the substance B; exchanging heat of condensation of the substance B and heat of evaporation of the substance A by a first heat exchanger; decompressing the condensed substance B; exchanging heat of evaporation of the substance B and heat of condensation of the substance A by a second heat exchanger; and mixing the substance A with the object to be treated, the substance A having been evaporated while separated from the water or the oil in the first heat exchanger, and condensed in the second heat exchanger; and installing a center of gravity of the first heat exchanger in a lower portion than a center of gravity of the second heat exchanger in a vertical direction.

8 . The solid-liquid separation method according to claim 7 , wherein
a flow path of the substance B is installed below a liquid level of the substance A in the first heat exchanger.

9 . The solid-liquid separation method according to claim 7 , wherein
a flow path of the substance B is installed above a liquid level of the substance A in the second heat exchanger.

10 . The solid-liquid separation method according to claim 7 , wherein
a gas-liquid separator is installed in an upper portion of the first heat exchanger and downstream of a flow path of the substance A.

11 . The solid-liquid separation method according to claim 7 , wherein
a gas-liquid separator is installed in a lower portion of the second heat exchanger and downstream of a flow path of the substance A.

12 . The solid-liquid separation method according to claim 7 , wherein
a liquid feed pump for the substance A is installed in a lower portion of the first heat exchanger and the second heat exchanger in the vertical direction.

Assignees

• Hitachi Ltd

Inventors

• Sano Tadashi
• Matsuzawa Mitsuhiro
• Sekiya Sachio
• Kokugan Yoko

Classifications

• B01J20/34

  Regenerating or reactivating · CPC title

• B01J20/3416

  of sorbents or filter aids comprising free carbon, e.g. activated carbon · CPC title

• B01D11/02

  of solids · CPC title

• C02F1/283

  using coal, charred products, or inorganic mixtures containing them · CPC title

• B01D3/40

  Extractive distillation · CPC title