Patent US4384923A successfully refreshed from Google Patents.
US4384923A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for the hygienization of carbonation sludges
Assignee: Deutsche Kommunal Anlagen Miete GmbH
•
Filing: 1981-07-06
•
Granted: 1983-05-24
•
Expires: 2001-07-06
Abstract
Abstract The invention relates to a process for the hygienization of carbonation sludges. For this purpose, these are mixed with wastes having a high calorific value and containing organic substances and are decomposed by pyrolysis, in the absence of air, at a temperature from 200° C. to 800° C., preferably 250° C. to 720° C. The fuel gases obtained in the decomposition by pyrolysis can be utilized for external heating of the thermal reactor, autothermic operation, that is to say self-sustaining operation, becoming possible when wastes of high calorific value are added to the carbonation sludge in such a quantity that the calorific value of the waste mixture is more than 1,000 kcal/kg.
Inventors
- 👤 Klaus Hillekamp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 06:58
CPC Classifications
C; C13; C13B; C13B20/00; C13B20/02; C13B20/04; C13B20/06; C02; C02F; C02F11/00; C02F11/10; C10; C10B; C10B53/00; Y; Y02; Y02W; Y02W10/00; Y02W10/40
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
71 words
A process for the thermal treatement of carbonation sludge obtained from the purification of raw juice from sugar refining to hygienize the same which comprises mixing the carbonation sludge with waste having a high calorific value and containing organic substances, wherein the resulting mixture is decomposed by pyrolysis, in the absence of air, at a temperature of from 200° C. to 800° C. thereby obtaining solid residues and combustible fuel gases.
Claim 2
Dependent Claim
71 words
A process for the thermal treatement of carbonation sludge obtained from the purification of raw juice from sugar refining to hygienize the same which comprises mixing the carbonation sludge with waste having a high calorific value and containing organic substances, wherein the resulting mixture is decomposed by pyrolysis, in the absence of air, at a temperature of from 200° C. to 800° C. thereby obtaining solid residues and combustible fuel gases.
Claim 3
Dependent Claim
15 words
The process of claim 1, wherein said temperature is from 250° C. to 720° C.
Claim 4
Dependent Claim
59 words
The process of claim 1, wherein said waste comprises an acid resin, and the mixing thereof with the carbonation sludge is carried out outside a thermal reactor in which the thermal treatment takes place, further wherein CO 2 is evolved and where decomposition of the mixture by pyrolysis takes place only after the evolution of CO 2 has ended.
Claim 5
Dependent Claim
12 words
The process of claim 1, wherein a thixotropic carbonation sludge is used.
Claim 6
Dependent Claim
48 words
The process of claim 1, wherein said carbonation sludge contains calcium carbonate and wherein said waste contains chlorine, the waste being added to said carbonation sludge in such quantity that the stoichiometric ratio of the chlorine, calculated as hydrogen chloride, to the calcium carbonate is 0.25 to 20.
Claim 7
Dependent Claim
60 words
The process of claim 1, wherein said waste contains chlorine, fluorine and sulfur and the carbonation sludge contains calcium carbonate, the waste being added to the carbonation sludge in an amount such that the stoichiometric ratio of chlorine, calculated as hydrogen chloride, fluorine, calculated as hydrogen fluoride, and sulfur, calculated as sulfuric acid, to calcium carbonate is 0.25 to 20.
Claim 8
Dependent Claim
27 words
The process of claim 1, wherein there is further added to the mixture which is to be decomposed by pyrolysis a material which will bind acid-forming substances.
Claim 9
Dependent Claim
48 words
A process as claimed in claim 1, wherein the waste contains heavy metals and the carbonation sludge contains calcium phosphate, the ratio of carbonation sludge to waste being such that the stoichiometric ratio of the heavy metals which are bound to the calcium phosphate is 0.2 to 5.
Claim 10
Dependent Claim
12 words
The process of claim 8, wherein said ratio is 0.25 to 3.
Claim 11
Dependent Claim
27 words
The process of claim 1, wherein said fuel gases are utilized at least in part for heating a thermal reactor in which the pyrolysis is carried out.
Claim 12
Dependent Claim
17 words
The process of claim 10, wherein the fuel gases are used to externally heat the thermal reactor.
Claim 13
Dependent Claim
18 words
The process of claim 11, wherein the fuel gases are utilized without purifying the same for said heating.
Claim 14
Dependent Claim
36 words
The process of claim 1, wherein the carbonation sludge is added to the waste in such quantity that the calorific value, Hu, of the resulting mixture is greater than 1,000 kcal/kg, whereby autothermic pyrolysis is effected.
Claim 15
Dependent Claim
11 words
The process of claim 1, wherein the carbonation sludge is dried.
Claim 16
Dependent Claim
23 words
The process of claim 1, wherein said carbonation sludge primarily comprises water, calcium carbonate and organic constituents which primarily comprise sucrose and aminoglucose.
Claim 17
Dependent Claim
15 words
The process of claim 1, wherein said pyrolysis is conducted in an externally heated reactor.
Claim 18
Dependent Claim
18 words
The process of claim 1, wherein said waste has a calorific value of 1,000 kcal/kg to 8,000 kcal/kg.
Claim 19
Dependent Claim
25 words
The process of claim 17, wherein the fuel gases resulting from said pyrolysis have a calorific value of from 2,000 to 10,000 kcal/Nm 3 .
Claim 20
Dependent Claim
21 words
The process of claim 1, wherein said carbonation sludge is in a very fine state whereby the same is highly reactive.
References Cited (Backward Citations)
DE92238C
Cited
CH484262A
Cited
US3733271A
Cited
DE2260616A1
Cited
US4123332A
Cited
US4272322A
Cited
DE2844741A1
Cited
DE2832414B1
Cited
DE2835267A1
Cited
DE2855510B1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-05-23 | 1986-11-22 | 1987-05-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-05-23 | 1990-11-22 | 1991-05-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-05-23 | 1994-11-22 | 1995-05-24 | $7700.00 | Window Closed / Lapsed |