US145409A - Improvement in reusing alkaline solutions from treating straw - Google Patents
Improvement in reusing alkaline solutions from treating straw Download PDFInfo
- Publication number
- US145409A US145409A US145409DA US145409A US 145409 A US145409 A US 145409A US 145409D A US145409D A US 145409DA US 145409 A US145409 A US 145409A
- Authority
- US
- United States
- Prior art keywords
- tank
- improvement
- alkaline solutions
- reusing
- treating straw
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000012670 alkaline solution Substances 0.000 title description 7
- 239000010902 straw Substances 0.000 title description 3
- 239000000463 material Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 239000003518 caustics Substances 0.000 description 2
- 239000002657 fibrous material Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000013707 sensory perception of sound Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 235000013311 vegetables Nutrition 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C11/00—Regeneration of pulp liquors or effluent waste waters
- D21C11/06—Treatment of pulp gases; Recovery of the heat content of the gases; Treatment of gases arising from various sources in pulp and paper mills; Regeneration of gaseous SO2, e.g. arising from liquors containing sulfur compounds
Definitions
- A represents a cylindrical tank, having trunnions a (1 adapted to hearings on a suitable frame.
- trunnions a (1 adapted to hearings on a suitable frame.
- I place the vegetable fibrous material to be treated, together with a suitable quantity of a solution of caustic alkali. While the tank revolves a jet of steam from a pipe, I), is introduced to it through one of the trunnions a.
- the cover d of a man-hole in the tank is removed, and the contents are permitted to fall onto a slotted 9r perforated platform in a tank, B, the fluid contents flowing through the platform into the tank, while the stock remains on the platform, where it is thoroughly washed preparatory to its removal, the water with which the material is washed taking up the alkali which remains in the fibers, and falling into the tank below.
- the alkaline solution is forced through a pipe, f, into a reservoir, D, having a perforated diaphragm, h, supporting suitable filtering material 1', through which the fluid percolates, leaving behind all particles of iibrous material and other foreign matter which it had held in suspension.
- the filteredliquid is, consequently, in the requisite pure condition to be restored to and reused in the revolving digesting-tank. It is, however, first pumped into the reservoir E during the time the digesting-tank is in operation, so that when this tank is emptied there will be a supply from which'it can be at once replenished.
- the alkaline solution necessarily loses much of its strength from the time it leaves the digestingtank until it reaches the reservoir E; hence, it becomes necessary to re-enforce it with a proper quantity of fresh caustic alkali before it is returned to the digesting-tank.
Landscapes
- Paper (AREA)
- Treatment Of Fiber Materials (AREA)
Description
.I. H. DUGAN.
Rousing Alkaline Solutions from Treat i'ng ,Straw.
Patented Deb. 9,1873. i
WITNESSES.
UNITED STATES PATENT QFFICE.
JAMES II. DUGAN, OF BLOOMFIELD, NEIV JERSEY.
IMPROVEMENT IN REUSING ALKALINE SOLUTIONS FROM TREATING STRAW.
Specification forming part of Letters Patent No. 145,409, dated Decrmber 9,1873; application filed October 26, 1872.
To all whom it may concern Be it known that I, JAMES H. DUGAN, of Bloomfield, Essex county, New Jersey, have invented an Improvement in the Reuse of Alkaline Solutions, of which the following is,
treatment of another batch of fibrous material.
In carrying my invention into efi'ect, I employ apparatus, substantially as illustrated in the accompanying drawing, in which A represents a cylindrical tank, having trunnions a (1 adapted to hearings on a suitable frame. Into this tank I place the vegetable fibrous material to be treated, together with a suitable quantity of a solution of caustic alkali. While the tank revolves a jet of steam from a pipe, I), is introduced to it through one of the trunnions a. After the material has been't-reated for a suitable length of time, the cover d of a man-hole in the tank is removed, and the contents are permitted to fall onto a slotted 9r perforated platform in a tank, B, the fluid contents flowing through the platform into the tank, while the stock remains on the platform, where it is thoroughly washed preparatory to its removal, the water with which the material is washed taking up the alkali which remains in the fibers, and falling into the tank below. From the tank B the alkaline solution is forced through a pipe, f, into a reservoir, D, having a perforated diaphragm, h, supporting suitable filtering material 1', through which the fluid percolates, leaving behind all particles of iibrous material and other foreign matter which it had held in suspension. The filteredliquid is, consequently, in the requisite pure condition to be restored to and reused in the revolving digesting-tank. It is, however, first pumped into the reservoir E during the time the digesting-tank is in operation, so that when this tank is emptied there will be a supply from which'it can be at once replenished. The alkaline solution necessarily loses much of its strength from the time it leaves the digestingtank until it reaches the reservoir E; hence, it becomes necessary to re-enforce it with a proper quantity of fresh caustic alkali before it is returned to the digesting-tank.
I do not claim, broadly, the re-enforeing of alkaline solutions in the manufacture of paperpulp; but
I claim The combination, with a tank, A, of a draining-tank, B, and filtering-reservoir D, operating together, as and for the purpose specified.
In testimony whereof I have signed my ,name to this specification in the presence of two subscribing witnesses.
4 JAMES H. DUGAN.
Vitnesses ABRAHAM ll/IANNERS, DANIEL E. DUGAN.
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US145409A true US145409A (en) | 1873-12-09 |
Family
ID=2214823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US145409D Expired - Lifetime US145409A (en) | Improvement in reusing alkaline solutions from treating straw |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US145409A (en) |
-
0
- US US145409D patent/US145409A/en not_active Expired - Lifetime
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