US3661719A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-polluting by-product coal carbonization plant
Assignee: Individual
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Filing: 1970-10-28
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Granted: 1972-05-09
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Expires: 1990-10-28
Abstract
Abstract As coal is heated to produce coke and coke oven gas the coke is delivered to a reactor where a bed of it is maintained. Most of the tar and ammonia and oil are removed from the coke oven gas and then the gas is passed through the coke bed. A tar plant receives the tar removed from the gas and produces coal tar pitch, which is delivered with calcium carbonate to the reactor to desulfurize the coke and gas therein and enriches the gas. The desulfurized gas is continuously removed from the reactor and cooled. Periodically a batch of desulfurized coke is withdrawn from the reactor. Steam is produced in cooling the coke and is used in heating an ammonia still. Water from the still is processed and used in an ammonia scrubber along with make-up water produced by condensing water vapor from the coke oven combustion gas. Only nonpolluting products leave the system. The rest are consumed or recirculated in it.
Inventors
- 👤 John J Kelmar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 12:45
CPC Classifications
C; C10; C10L; C10L9/00; C10B; C10B57/00; C10B57/005; Y; Y02; Y02P; Y02P20/00; Y02P20/10; Y02P20/129
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
41 words
The method recited in claim 1, including producing steam by waste heat from said coal heating and by heat removed from said gas in cooling it, and using said steam to spray said tar pitch and calcium carbonate onto said bed.
Claim 2
Dependent Claim
68 words
The method recited in claim 1, including using steam, substantially pure oxygen and some of said removed coke oven gas to produce the heat for the coal and form products of combustion that include carbon dioxide gas and water vapor, condensing said vapor and separating it from the carbon dioxide, liquefying the carbon dioxide, and using liquefied carbon dioxide as a refrigerant in the production of liquid oxygen.
Claim 3
Dependent Claim
23 words
The method recited in claim 3, including cooling said removed coke oven gas with water, and cooling the water with liquid carbon dioxide.
Claim 4
Dependent Claim
26 words
The method recited in claim 3, including using at least some of said ammonia and some of said liquid carbon dioxide in the making of urea.
Claim 5
Dependent Claim
137 words
By-product coal carbonization Apparatus comprising a coke oven for reducing coal to coke and having an outlet for coke oven gas, a reactor, means for delivering coke from said oven to the reactor to maintain a bed of coke therein, means for removing most of the tar and ammonia and oil from said gas and then delivering the gas to the reactor, a tar plant that receives said tar removed from said gas and produces coal tar pitch, means for making calcium carbonate, means for delivering said pitch and calcium carbonate to the reactor to desulfurize the coke and gas therein, means for continuously removing the gas from the reactor after it has passed through said coke bed, means for cooling the removed gas, and means for periodically withdrawing a batch of desulfurized coke from the reactor.
Claim 6
Dependent Claim
39 words
Apparatus according to claim 6, including waste heat boilers associated with the coke oven and said gas removing means for generating steam, and means for spraying said pitch and calcium carbonate into the reactor by means of said steam.
Claim 7
Dependent Claim
52 words
Apparatus according to claim 6, including hopper means beneath the reactor for receiving coke therefrom, valves for periodically admitting coke to and discharging it from said hopper means, water jacketing surrounding said hopper means, and means for circulating a cooling liquid through said jacketing to cool the coke in the hopper means.
Claim 8
Dependent Claim
94 words
Apparatus according to claim 6, in which said coke-delivering means include a coke hopper connected with the top of the reactor, the hopper and reactor being surrounded by water jackets, and said apparatus includes a steam chamber, conduits for delivering steam to said chamber from said water jackets, a waste heat boiler associated with the coke oven for generating steam, a conduit connecting the boiler with said chamber, and a conduit connecting said chamber with said delivering means for said pitch and calcium carbonate to spray the pitch and calcium carbonate into the reactor.
Claim 9
Dependent Claim
82 words
Apparatus according to claim 6, including an ammonia still, means for water-cooling the coke and thereby generating steam, means for conducting the steam to the ammonia still to heat the still, a reverse osmosis system for processing liquid from said still and discharging water, ammonia scrubbing means, means delivering water from said system to the scrubbing means, means for condensing water vapor from the coke oven combustion gases, and means for supplying the condensed vapor to said scrubbing means as make-up water.
Claim 10
Dependent Claim
80 words
Apparatus according to claim 6, including means for delivering steam, substantially pure oxygen and some of said removed coke oven gas to the coke oven to fire the oven and form products of combustion that include carbon dioxide gas and water vapor, means for condensing said vapor and separating it from the carbon dioxide, a carbon dioxide liquefying plant, a liquid oxygen plant, and means for delivering liquid carbon dioxide to the liquid oxygen plant to furnish the refrigeration therefor.
Claim 11
Dependent Claim
33 words
Apparatus according to claim 11, in which said means for cooling the coke oven gas include a water circuit and means for cooling the water in said circuit with said liquid carbon dioxide.
Claim 12
Dependent Claim
30 words
Apparatus according to claim 11, including a urea plant, and means for delivering at least some of said ammonia and some of said liquid carbon dioxide to said urea plant.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-09 | 1975-11-08 | 1976-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-09 | 1979-11-08 | 1980-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-09 | 1983-11-08 | 1984-05-09 | $7700.00 | Window Closed / Lapsed |