Apparatus and method for controlled chemical blending
First Claim
1. A chemical blending apparatus comprising:
- (a) more than one chemical blending vessel with tops and bottoms and with inlets at the tops;
(b) a pair of automatic inlet valves connected to each chemical blending vessel, one automatic inlet valve with a large inlet orifice and one automatic inlet valve with a relatively much smaller inlet orifice;
(c) at least two chemical batch tanks for holding chemicals to be blended, each chemical batch tank connected to said pair of automatic inlet valves;
(d) a pump connected to said chemical batch tanks for high speed delivery of chemicals from said chemical batch tanks to said automatic inlet valves;
(e) a weight cell means for measuring the weight of chemicals added to said chemical blending vessels, connected to said chemical blending vessel;
(f) a controller means for controlling the transfer of chemicals and opening and closing said automatic inlet valves, connected to said weight cell means; and
(g) a discharge line connected to the bottoms of said chemical blending vessels and to a receiving station, containing a static mixer and connected to a discharge line pump and a filter and sampling means so that a resultant blend of chemicals is mixed, filtered, and sampled after discharge from said chemical blending vessels and prior to delivery to said receiving station.
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Accused Products
Abstract
A chemical blending system having more than one chemical blending vessel (12, 12'"'"') with inlets at the top. A pair of automatic inlet valves are connected to the top of each chemical blending vessel, one with a large inlet orifice and one with a relatively much smaller inlet orifice. At least two chemical batch tanks are connected to the pair of automatic inlet valves and chemicals to be mixed are delivered there at high speed by pumps. Weight cell devices (30) are attached to the bottom of each blending vessel. A controller/computer is connected for the automatic control of pumps (28, 36) and valves (20, 50, 58). A discharge line is connected to the bottom of blending vessels and to a receiving station, and includes pulsation dampeners (38), filters (40) and static mixers (42). A sampling device (46) is connected a recirculation line for the sampling of the blended chemical during recirculation and prior to delivery. Drain valve and drain line are connected to the bottom of the blending vessel for the draining and delivery of unused chemical to remote recovery tank (54). When one blending vessel is delivering appropriately blended chemical, another chemical blending vessel is being filled so that an essentially continuous, uninterrupted supply of appropriately and quickly blended chemical is available.
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Citations
13 Claims
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1. A chemical blending apparatus comprising:
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(a) more than one chemical blending vessel with tops and bottoms and with inlets at the tops; (b) a pair of automatic inlet valves connected to each chemical blending vessel, one automatic inlet valve with a large inlet orifice and one automatic inlet valve with a relatively much smaller inlet orifice; (c) at least two chemical batch tanks for holding chemicals to be blended, each chemical batch tank connected to said pair of automatic inlet valves; (d) a pump connected to said chemical batch tanks for high speed delivery of chemicals from said chemical batch tanks to said automatic inlet valves; (e) a weight cell means for measuring the weight of chemicals added to said chemical blending vessels, connected to said chemical blending vessel; (f) a controller means for controlling the transfer of chemicals and opening and closing said automatic inlet valves, connected to said weight cell means; and (g) a discharge line connected to the bottoms of said chemical blending vessels and to a receiving station, containing a static mixer and connected to a discharge line pump and a filter and sampling means so that a resultant blend of chemicals is mixed, filtered, and sampled after discharge from said chemical blending vessels and prior to delivery to said receiving station. - View Dependent Claims (2, 3, 4, 5)
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6. A chemical blending apparatus comprising:
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(a) two chemical blending vessels for simultaneous blending and discharging of blended chemicals, with tops with inlets and cone shaped bottoms; (b) a pair of automatic inlet valves connected to said inlets, one automatic inlet valve with a large inlet orifice and one automatic inlet valve with a relatively much smaller inlet orifice; (c) a plurality of chemical batch tanks for holding chemicals to be blended, each chemical batch tank connected to said pair of automatic inlet valves; (d) a pump connected to each chemical batch tank for high speed delivery of chemical from said chemical batch tank to said pair of automatic inlet valves; (e) a weight cell means for measuring the weight of chemicals added to said chemical blending vessels, connected to each of said chemical blending vessels; (f) a controller means for controlling the transfer of chemicals and opening and closing said automatic inlet valves, connected to said weight cell means; and (g) a discharge line connected to the bottom of each of said chemical blending vessels and to a receiving station, containing a static mixer, and connected to a discharge line pump and filter and a sampling means so that a resultant blend of chemicals is mixed, filtered, and sampled after discharge from said chemical blending vessels and prior to delivery to said receiving station. - View Dependent Claims (7, 8)
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9. A chemical blending method comprising the steps of:
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(a) providing two chemical blending vessels with top inlets and coned bottoms; (b) connecting a pair of automatic inlet valves to said top inlets, said pair of automatic inlet valves provided with one large inlet orifice and one with a relatively much smaller inlet orifice; (c) connecting at least two chemical batch tanks for holding chemicals to be blended to each of said pairs of automatic inlet valves; (d) connecting a pump to each of said chemical batch tanks, for high speed delivery of chemicals from said chemical batch tanks to said pairs of automatic inlet valves; (e) connecting a weight cell means to each of said chemical blending vessels for measuring the weight of chemicals added to said chemical blending vessels; (f) connecting a controller means for controlling the transfer of chemicals and opening and closing said pairs of automatic inlet valves, to said weight cell means; (g) connecting a discharge line to the bottom of each of said chemical blending vessels and to a receiving station, and providing a static mixer, a discharge line pump, a filter and a sampling means within said discharge line so that a resultant blend of chemicals is mixed, filtered, and sampled after discharge from said chemical blending vessels and prior to delivery to said receiving station; and (h) operating said controller means so that said pump connected to said chemical batch tanks pumps a selected chemical at high speed through the automatic inlet valve with a large inlet orifice until such time as the weight cell means indicates that a majority of the selected chemical has been pumped to the chemical blending vessel when the controller means then directs the selected chemical to the automatic inlet valve with the relatively much smaller inlet orifice for high speed delivery of the remainder of the required chemical until such time as the weight cell means indicates that the proper weight for that selected chemical has been achieved at which point the controller means directs the addition of a second and following chemicals to the chemical blending vessel in a similar manner. - View Dependent Claims (10, 11, 12, 13)
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Specification