Harmless treatment device for ion exchange resin production waste liquid

Abstract

The utility model discloses a harmless treatment device for ion exchange resin production waste liquid, which comprises a multi-effect evaporator, a separation device, an activated carbon adsorption reaction kettle, a filter press, a zinc sulfate synthesis reaction kettle and a centrifugal separation reaction kettle, an evaporation residual liquid outlet of the multi-effect evaporator is connected with an activated carbon adsorption reaction kettle, the activated carbon adsorption reaction kettle is connected with an activated carbon inlet, an outlet of the activated carbon adsorption reaction kettle is connected with a filter press, and a filtrate outlet of the filter press is connected with a zinc sulfate synthesis reaction kettle. The zinc sulfate synthesis reaction kettle is connected with a zinc oxide inlet, and an outlet of the zinc sulfate synthesis reaction kettle is connected with a centrifugal separation reaction kettle. According to the device, organic matters in the resin waste liquid are removed to obtain relatively pure sulfuric acid, and an industrial zinc sulfate product is obtained through subsequent utilization of the sulfuric acid, so that resource utilization of the waste liquid is realized.

Description

[Technical field]

[0001] The utility model relates to the technical field of waste liquid treatment, in particular to the technical field of a harmless disposal device for waste liquid produced by ion exchange resin. [Background technology]

[0002] A large amount of acidic waste liquid is generated in the production process of styrene anion exchange resin and other types of resins. Its components are acidic inorganic acids and organic matter such as sulfuric acid, hydrochloric acid, methanol, methylal, etc., which are difficult to handle, high in cost and highly harmful to the environment during the disposal process. [Utility Model Content]

[0003] The purpose of the utility model is to solve the problems in the prior art and to provide a harmless disposal device for waste liquid produced by ion exchange resin, which can solve the above problems.

[0004] To achieve the above-mentioned purpose, the utility model proposes a harmless disposal device for ion exchange resin production waste liquid, comprising a multiple-effect evaporator, a separation device, an activated carbon adsorption reactor, a filter press, a zinc sulfate synthesis reactor and a centrifugal separation reactor, wherein the evaporation liquid outlet of the multiple-effect evaporator is connected with the separation device, the evaporation residual liquid outlet of the multiple-effect evaporator is connected with the activated carbon adsorption reactor, the activated carbon adsorption reactor is connected with an activated carbon inlet, the outlet of the activated carbon adsorption reactor is connected with the filter press, the filtrate outlet of the filter press is connected with the zinc sulfate synthesis reactor, the zinc sulfate synthesis reactor is connected with a zinc oxide inlet, the outlet of the zinc sulfate synthesis reactor is connected with the centrifugal separation reactor, the centrifugal liquid outlet of the centrifugal separation reactor is connected with a centrifugal liquid recovery pipe, and the centrifugal liquid recovery pipe is connected with the zinc sulfate synthesis reactor.

[0005] Preferably, the separation device comprises a distillation separation tower, a reboiler, a condenser, a methanol collecting tank and a hydrochloric acid collecting tank, the mixed liquid evaporated from the multi-effect evaporator is connected to the distillation separation tower through a feed pipe, a liquid discharge pipe is provided at the bottom of the distillation separation tower, the liquid discharge pipe is connected to a hydrochloric acid return pipe and a hydrochloric acid collecting pipe, the hydrochloric acid return pipe is connected to a reboiler, the gas phase discharge pipe of the reboiler is connected to the bottom of the distillation separation tower, the hydrochloric acid collecting pipe is connected to the hydrochloric acid collecting tank, a gas discharge pipe is provided at the top of the distillation separation tower, the gas discharge pipe is connected to the condenser inlet, the outlet of the condenser is connected to a methanol discharge pipe, the methanol discharge pipe is connected to a methanol return pipe and a methanol collecting pipe, the methanol discharge pipe is connected to the top of the distillation separation tower through a methanol return pipe, and the methanol discharge pipe is connected to the methanol collecting tank through a methanol collecting pipe.

[0006] Beneficial effects of the utility model: The utility model adopts vacuum distillation, activated carbon adsorption and other processes to remove organic matter in resin waste liquid, obtain relatively pure sulfuric acid, and obtain industrial zinc sulfate products through subsequent utilization of sulfuric acid, so as to realize resource utilization of the waste liquid; after the resin waste liquid is subjected to multi-effect evaporation, chloride ions and low-boiling point organic matter are separated by vacuum distillation to obtain hydrochloric acid and low-volatile organic matter. Hydrochloric acid is sold as a commodity, and low-volatile organic matter can enter the sewage treatment station as a carbon source; the distillation residue is sulfuric acid and partially carbonized organic matter, which is adsorbed by activated carbon and then filtered to obtain pure sulfuric acid; the waste activated carbon is regenerated and reused. Pure sulfuric acid reacts with water and zinc oxide and is centrifugally filtered to obtain industrial zinc sulfate heptahydrate.

[0007] The features and advantages of the present invention will be described in detail through embodiments in conjunction with the accompanying drawings.

Brief Description of the Drawings

[0008] Figure 1 It is a process flow chart of the utility model;

[0009] Figure 2 It is a schematic diagram of the harmless disposal device of the utility model;

[0010] Figure 3 It is a schematic diagram of the separation device of the utility model.

[0011] In the figure: 1-multiple-effect evaporator; 2-separation device; 3-activated carbon adsorption reactor; 4-filter press; 5-zinc sulfate synthesis reactor; 6-centrifugal separation reactor; 21-distillation separation tower; 22-reboiler; 23-condenser; 24-methanol collection tank; 25-hydrochloric acid collection tank; 211-feeding pipe; 212-gas discharge pipe; 213-liquid discharge pipe; 214-hydrochloric acid return pipe; 215-hydrochloric acid collection pipe; 221-gas phase discharge pipe; 231-methanol discharge pipe; 232-methanol return pipe; 233-methanol collection pipe. [Specific implementation method]

[0012] See also Figure 1-3 A method for harmlessly disposing waste liquid from ion exchange resin production comprises the following steps:

[0013] S1: The resin waste liquid is evaporated at low temperature and under negative pressure by a multi-effect evaporator. A mixed gas of methanol and dilute hydrochloric acid is evaporated from the resin waste liquid. The mixed gas is condensed to obtain an evaporated liquid. The evaporated liquid enters a separation device, and the methanol and the dilute hydrochloric acid are separated by the separation device. The separated hydrochloric acid is sold as a commodity, and the methanol can enter a sewage treatment plant as a carbon source.

[0014] The temperature range of low temperature negative pressure evaporation is -5-10℃.

[0015] S2: The carbonized organic matter in the evaporation residual liquid is adsorbed by powdered activated carbon, and sulfuric acid is obtained after filtration. The activated carbon is regenerated and reused;

[0016] S3: adding zinc oxide to the obtained sulfuric acid to react, and obtaining industrial zinc sulfate heptahydrate after centrifugal filtration, and the centrifuge liquid is reused.

[0017] A harmless disposal device for waste liquid produced by ion exchange resin, comprising a multiple-effect evaporator 1, a separation device 2, an activated carbon adsorption reactor 3, a filter press 4, a zinc sulfate synthesis reactor 5 and a centrifugal separation reactor 6, wherein the evaporation liquid outlet of the multiple-effect evaporator 1 is connected with the separation device 2, the evaporation residual liquid outlet of the multiple-effect evaporator 1 is connected with the activated carbon adsorption reactor 3, the activated carbon adsorption reactor 3 is connected with an activated carbon inlet, the outlet of the activated carbon adsorption reactor 3 is connected with the filter press 4, the filtrate outlet of the filter press 4 is connected with the zinc sulfate synthesis reactor 5, the zinc sulfate synthesis reactor 5 is connected with a zinc oxide inlet, the outlet of the zinc sulfate synthesis reactor 5 is connected with the centrifugal separation reactor 6, the centrifugal liquid outlet of the centrifugal separation reactor 6 is connected with a centrifugal liquid recovery pipe, and the centrifugal liquid recovery pipe is connected with the zinc sulfate synthesis reactor 5, the separation device 2 comprises a rectification separation tower 21, a reboiler 22, a condenser 23, a methanol collection tank 24 and a hydrochloric acid collection tank 2 5, the mixed liquid evaporated from the multiple-effect evaporator 1 is connected to the distillation separation tower 21 through the feed pipe 211, the bottom of the distillation separation tower 21 is provided with a liquid discharge pipe 213, the liquid discharge pipe 213 is connected to a hydrochloric acid return pipe 214 and a hydrochloric acid collecting pipe 215, the hydrochloric acid return pipe 214 is connected to a reboiler 22, the gas phase discharge pipe 221 of the reboiler 22 is connected to the bottom of the distillation separation tower 21, the hydrochloric acid collecting pipe 215 is connected to the hydrochloric acid collecting tank 25, A gas discharge pipe 212 is provided at the top of the distillation separation tower 21, and the gas discharge pipe 212 is connected to the inlet of the condenser 23. The outlet of the condenser 23 is connected to a methanol discharge pipe 231. The methanol discharge pipe 231 is connected to a methanol return pipe 232 and a methanol collecting pipe 233. The methanol discharge pipe 231 is connected to the top of the distillation separation tower 21 through the methanol return pipe 232, and the methanol discharge pipe 231 is connected to the methanol collecting tank 24 through the methanol collecting pipe 233.

[0018] The above embodiments are intended to illustrate the present invention, not to limit the present invention. Any solution that is a simple transformation of the present invention falls within the protection scope of the present invention.

Claims

1. A harmless disposal device for ion exchange resin production waste liquid, characterized in that: The invention comprises a multiple-effect evaporator (1), a separation device (2), an activated carbon adsorption reactor (3), a filter press (4), a zinc sulfate synthesis reactor (5) and a centrifugal separation reactor (6), wherein the evaporation liquid outlet of the multiple-effect evaporator (1) is connected to the separation device (2), the evaporation residual liquid outlet of the multiple-effect evaporator (1) is connected to the activated carbon adsorption reactor (3), the activated carbon adsorption reactor (3) is connected to the activated carbon inlet, the outlet of the activated carbon adsorption reactor (3) is connected to the filter press (4), the filtrate outlet of the filter press (4) is connected to the zinc sulfate synthesis reactor (5), the zinc sulfate synthesis reactor (5) is connected to the zinc oxide inlet, the outlet of the zinc sulfate synthesis reactor (5) is connected to the centrifugal separation reactor (6), the centrifugal liquid outlet of the centrifugal separation reactor (6) is connected to a centrifugal liquid recovery pipe, and the centrifugal liquid recovery pipe is connected to the zinc sulfate synthesis reactor (5).

2. The harmless disposal device for ion exchange resin production waste liquid according to claim 1, characterized in that: The separation device (2) comprises a distillation separation tower (21), a reboiler (22), a condenser (23), a methanol collection tank (24) and a hydrochloric acid collection tank (25); the mixed liquid evaporated from the multiple-effect evaporator (1) is connected to the distillation separation tower (21) via a feed pipe (211).

3. The harmless disposal device for ion exchange resin production waste liquid according to claim 2, characterized in that: A liquid discharge pipe (213) is provided at the bottom of the distillation separation tower (21), the liquid discharge pipe (213) is connected to a hydrochloric acid return pipe (214) and a hydrochloric acid collecting pipe (215), the hydrochloric acid return pipe (214) is connected to a reboiler (22), a gas phase discharge pipe (221) of the reboiler (22) is connected to the bottom of the distillation separation tower (21), and the hydrochloric acid collecting pipe (215) is connected to a hydrochloric acid collecting tank (25).

4. The harmless disposal device for ion exchange resin production waste liquid according to claim 2, characterized in that: A gas discharge pipe (212) is provided at the top of the distillation separation tower (21), the gas discharge pipe (212) is connected to the inlet of the condenser (23), the outlet of the condenser (23) is connected to a methanol discharge pipe (231), the methanol discharge pipe (231) is in communication with a methanol return pipe (232) and a methanol collection pipe (233), the methanol discharge pipe (231) is connected to the top of the distillation separation tower (21) via the methanol return pipe (232), and the methanol discharge pipe (231) is connected to a methanol collection tank (24) via the methanol collection pipe (233).

5. The harmless disposal device for ion exchange resin production waste liquid according to claim 1, characterized in that: The multiple-effect evaporator (1) is a vacuum decompression type multiple-effect evaporator.

Images