Apparatus and method for re-circulating wash water used in manufacturing glass fiber products
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C08L-001/00
C08L-003/00
C08L-005/00
C09D-101/00
C09D-103/00
C09D-105/00
C08L-001/26
C09D-101/26
C08L-003/02
C09D-004/00
C09J-004/00
출원번호
US-0313086
(2011-12-07)
등록번호
US-8821625
(2014-09-02)
발명자
/ 주소
Shallenberger, David L.
Burn, Terry
Chen, Liang
Cooper, William
출원인 / 주소
Owens Corning Intellectual Capital, LLC
대리인 / 주소
Calfee, Halter & Griswold LLP
인용정보
피인용 횟수 :
0인용 특허 :
29
초록▼
A method of re-circulating washwater used to clean production components for the manufacture of fibrous insulation, e.g. fiberglass is disclosed. The method includes providing a bulk washwater recovery loop to re-circulate washwater used to clean the downstream air components, as well as a separate
A method of re-circulating washwater used to clean production components for the manufacture of fibrous insulation, e.g. fiberglass is disclosed. The method includes providing a bulk washwater recovery loop to re-circulate washwater used to clean the downstream air components, as well as a separate hoodwall washwater recovery loop to re-circulate hoodwall washwater. Re-circulated hoodwall washwater may be used to clean the forming hood components and for preparation of binder dispersions. In the latter case, the pH of the hoodwall washwater is measured and the binder dispersion may be prepared with 100% hoodwall washwater, 100% makeup water, or a blend of each depending on and in response to the pH measurement.
대표청구항▼
1. A method of re-cycling washwater used to clean production components for the manufacture of mineral fiber products, the production components including at least forming hood components in which a low pH binder is used with mineral fibers to form a fibrous pack, the method comprising the steps of:
1. A method of re-cycling washwater used to clean production components for the manufacture of mineral fiber products, the production components including at least forming hood components in which a low pH binder is used with mineral fibers to form a fibrous pack, the method comprising the steps of: collecting washwater in a hoodwall washwater recovery loop that receives hoodwall washwater from a hoodwall cleaning system for cleaning the forming hoodwall and re-cycling the hoodwall washwater for re-use in the preparation of binder dispersions; measuring the pH of the hoodwall washwater in the hoodwall washwater recovery loop; and preparing a low pH binder dispersion, wherein preparing a low pH binder dispersion comprises preparing a natural starch binder dispersion, and wherein the proportion of hoodwall washwater used to prepare the binder dispersion is determined in response to said pH measurement, such that if the pH is less than a predetermined lower limit, L, the hoodwall washwater is used exclusively; if the pH is more than a predetermined upper limit, U, the hoodwall washwater is not used and makeup water is used instead; and if the pH is between L and U, a blend of hoodwall washwater and makeup water is used. 2. The method of claim 1 wherein if the pH is between L and U, the blend of hoodwall washwater and water from a makeup source is proportioned according to a step function algorithm. 3. The method of claim 1 wherein if the pH is between L and U, the blend of hoodwall washwater and water from a makeup source is proportioned according to a continuous function algorithm. 4. The method of claim 3 wherein if the pH is between L and U, the blend of hoodwall washwater and water from a makeup source is proportioned according to a linear function algorithm. 5. The method of claim 4 wherein if the pH is between L and U, the blend of hoodwall washwater and makeup water is proportioned such that the fraction of hoodwall washwater in the blend is (U-pH)/(U-L). 6. The method of claim 1, further comprising using hoodwall washwater recovery loop also to supply washwater to the hoodwall cleaning system. 7. The method of claim 1 wherein the mineral fibers comprise glass fibers. 8. The method of claim 7, further comprising a step of separating glass fibers and particulate binder from the hoodwall washwater. 9. A method of re-cycling washwater used to clean production components for the manufacture of mineral fiber products, the production components including at least forming hood components in which a low pH binder is used with mineral fibers to form a fibrous pack, the method comprising the steps of: collecting washwater in a hoodwall washwater recovery loop that receives hoodwall washwater from a hoodwall cleaning system for cleaning the forming hoodwall and re-cycling the hoodwall washwater for re-use in the preparation of binder dispersions; measuring the pH of the hoodwall washwater in the hoodwall washwater recovery loop; and preparing a low pH binder dispersion including one more of a natural starch, dextrin, or polysaccharide, wherein the proportion of hoodwall washwater used to prepare the binder dispersion is determined in response to said pH measurement, such that if the pH is less than a predetermined lower limit, L, the hoodwall washwater is used exclusively; if the pH is more than a predetermined upper limit, U, the hoodwall washwater is not used and makeup water is used instead; and if the pH is between L and U, a blend of hoodwall washwater and makeup water is used. 10. The method of claim 9, wherein if the pH is between L and U, the blend of hoodwall washwater and water from a makeup source is proportioned according to a step function algorithm. 11. The method of claim 9, wherein if the pH is between L and U, the blend of hoodwall washwater and water from a makeup source is proportioned according to a continuous function algorithm. 12. The method of claim 11, wherein if the pH is between L and U, the blend of hoodwall washwater and water from a makeup source is proportioned according to a linear function algorithm. 13. The method of claim 12, wherein if the pH is between L and U, the blend of hoodwall washwater and makeup water is proportioned such that the fraction of hoodwall washwater in the blend is (U-pH)/(U-L). 14. The method of claim 9, further comprising using hoodwall washwater recovery loop also to supply washwater to the hoodwall cleaning system. 15. The method of claim 9, wherein the mineral fibers comprise glass fibers. 16. The method of claim 7, further comprising a step of separating glass fibers and particulate binder from the hoodwall washwater.
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이 특허에 인용된 특허 (29)
Helbing Clarence H. (1315 Hale Rd. Shelbyville IN 46176), Apparatus for producing a fiberglass pack with two steps of binder application.
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Fachat Gaston (Ladenburg DEX) Sistermann Klaus (Neustadt DEX) Ungerer Heinz-Jrgen (Viernheim DEX), Apparatus for producing fibres from silicate raw materials such as basalt by blast drawing.
Freeman,Charles John; Charbonneau,Mark William; Packard,Richard Thomas, Control of pre-cured product moisture for formaldehyde-free fiberglass products.
Chen, Liang; Bullock, Kathleen M.; Downey, William E.; Pellegrin, Michael T.; Delaviz, Yadollah; Guigley, Kevin; Cline, Harry B., Polycarboxylic acid based co-binder.
Crowley Thomas N. (Myrtle Beach SC) Urbanski David M. (Philadelphia PA), Process for the treatment of waste water from a fiberglass manufacturing process.
Gaa Peter C. (Pittsburgh PA) Hedden Jerry C. (Shelby NC) Raghupathi Narasimhan (Murrysville PA), Treated glass fibers and aqueous dispersion and nonwoven mat of the glass fibers.
Guerro Gerald J. (Trumbull CT) Henderson ; Jr. William A. (Stamford CT) Singh Balwant (Stamford CT), Water soluble binder compositions containing beta-hydroxy urethanes and polyfunctional carboxylic acids.
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