CN108840425A

CN108840425A - A kind of thiocarbohydrazide wastewater treatment method

Info

Publication number: CN108840425A
Application number: CN201810746584.5A
Authority: CN
Inventors: 郭秦; 崔利飞; 尹占杰; 田勤俭
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-07-09
Filing date: 2018-07-09
Publication date: 2018-11-20

Abstract

The invention discloses a kind of thiocarbohydrazide wastewater treatment methods, include the following steps：By the 4 tons i.e. waste water of a batch of material, it is squeezed into reaction kettle with pump, open stirring, open tail gas absorbing system, chlorine cylinder is set and is weighed on platform scale, it opens steel cylinder and leads to chlorine into kettle, reaction kettle is jacketed and then opens inwards into recirculated water, control the temperature of reaction kettle, utilize industrial 40% useless dilute sulfuric acid, it reacts, eliminate hydrazine hydrate and sulfur-containing compound therein, generate hydrazine sulfate and sulphur, substantially reduce its COD amount ammonia nitrogen amount, COD amount ammonia nitrogen amount removal rate is up to 95%, this method is simple and easy, energy conservation and environmental protection, high COD sulphur card waste water is set to be degraded, processing difficulty and processing cost are reduced for next step chemical processing effluent, 99% hydrazine sulfate and sulphur that by-product goes out can be sold, produce certain economic benefit.

Description

A kind of thiocarbohydrazide wastewater treatment method

Technical field

The invention belongs to field of waste water treatment, and in particular to a kind of thiocarbohydrazide wastewater treatment method.

Background technique

Waste water refers to the general name of the water being discharged in resident's active procedure and runoff rainwater, it includes sanitary sewage, Industry Waste Water and first rain diameter flow into other useless water such as sewer, refer generally to be unable to after certain technical treatment recycling or The water that certain standard is not achieved in pure processing difficulty is made after level-one pollution, thiocarbohydrazide, also known as sulfur carbazide, sulphur carbazide, Diamino thiocarbamide, 1.3- diamino thiocarbamide, N.N- is bis--（2.4- dimethylimino methyl）Methylamine is widely used in organic synthesis, It is the important raw materials for production of high-efficiency broad spectrum herbicide-metribuzin, the production of thiocarbohydrazide can generate a large amount of waste water.

Existing thiocarbohydrazide（Abbreviation sulphur card）Production production when, be with 80% hydrazine hydrate with carbon disulfide the system of reacting , it generates and largely contains 10% hydrazine hydrate and sulfur-containing waste water, extremely difficult, COD is up to 250000mg/L, and ammonia nitrogen amount is up to 10000mg/L, for this purpose, proposing a kind of thiocarbohydrazide wastewater treatment method.

Summary of the invention

The purpose of the present invention is to provide a kind of thiocarbohydrazide wastewater treatment methods, to solve to mention in above-mentioned background technique Existing thiocarbohydrazide out（Abbreviation sulphur card）Production is to be reacted to be made with carbon disulfide with 80% hydrazine hydrate in production, It generates and largely contains 10% hydrazine hydrate and sulfur-containing waste water, extremely difficult, COD is up to 250000mg/L, and ammonia nitrogen amount is up to 10000mg/ The problem of L.

To achieve the above object, present invention employs following technical solutions：

A kind of thiocarbohydrazide wastewater treatment method, includes the following steps：

S1, by 4 tons i.e. a batch of material waste water, squeezed into reaction kettle with pump, open stirring, open tail gas absorbing system；

S2, chlorine cylinder is set and is weighed on platform scale, opened steel cylinder and lead to chlorine into kettle；

S3, reaction kettle are jacketed and then open inwards into recirculated water, control the temperature of reaction kettle；

S4, when chlorine is 650 kilograms logical enough, whether the pH value detected in reaction kettle meets the requirements, if do not met, continues to anti- It answers and is passed through chlorine in kettle；

By filter press filters pressing, filter cake is the sulphur weight of recycling for S5, the waste water having friendly relations, and filtrate is put into sewage plant, carries out next Walk depths reason；

S6, COD removal rate 98%, convenient for carrying out further in-depth processing to waste water.

Preferably, the amount ventilated in the S2 cannot be excessive, and chlorine is avoided to overflow.

Preferably, control temperature is at 35 degree or less after being passed through recirculated water in reaction kettle in the institute S3.

Preferably, the pH value in the S4 in reaction kettle stops logical chlorine at 3 or so.

Preferably, the sulphur weight recycled in the S5 is 200kg, and COD is 5000 mg/L or so, ammonia after treatment Nitrogen quantity 500mg/L.

Technical effect and advantage of the invention：A kind of thiocarbohydrazide wastewater treatment method proposed by the present invention, and it is existing Technology is compared, and is had the following advantages that：

1, it using industrial 40% useless dilute sulfuric acid, reacts, eliminates hydrazine hydrate and sulfur-containing compound therein, generate sulfuric acid Hydrazine and sulphur substantially reduce its COD amount ammonia nitrogen amount, and it is useless both to have handled thiocarbohydrazide up to 95% for COD amount ammonia nitrogen amount removal rate Water has handled industrial waste sulfuric acid again, and can generate certain economic benefit；

2, this method is simple and easy, energy conservation and environmental protection, and high COD sulphur card waste water is made to be degraded, and drops for next step chemical processing effluent Reduction process difficulty and processing cost, 99% hydrazine sulfate and sulphur that by-product goes out can be sold, and certain economic benefit is produced.

Specific embodiment

Below in conjunction with the embodiment of the present invention, technical scheme in the embodiment of the invention is clearly and completely described, Obviously, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments, based in the present invention Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the scope of protection of the invention.

Embodiment 1

The present invention provides a kind of thiocarbohydrazide wastewater treatment methods, include the following steps：

Embodiment 2

S1, by 2 tons i.e. a batch of material waste water, squeezed into reaction kettle with pump, open stirring, open tail gas absorbing system；

S4, when chlorine is 450 kilograms logical enough, whether the pH value detected in reaction kettle meets the requirements, if do not met, continues to anti- It answers and is passed through chlorine in kettle；

S6, COD removal rate 58%, convenient for carrying out further in-depth processing to waste water.

Embodiment 3

S1, by 3 tons i.e. a batch of material waste water, squeezed into reaction kettle with pump, open stirring, open tail gas absorbing system；

S4, when chlorine is 550 kilograms logical enough, whether the pH value detected in reaction kettle meets the requirements, if do not met, continues to anti- It answers and is passed through chlorine in kettle；

S6, COD removal rate 78%, convenient for carrying out further in-depth processing to waste water.

Finally it should be noted that：The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, Although the present invention is described in detail referring to the foregoing embodiments, for those skilled in the art, still may be used To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features, All within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should be included in of the invention Within protection scope.

Claims

1. a kind of thiocarbohydrazide wastewater treatment method, it is characterised in that：Include the following steps：

2. a kind of thiocarbohydrazide wastewater treatment method according to claim 1, it is characterised in that：It ventilates in the S2 Amount cannot be excessive, and chlorine is avoided to overflow.

3. a kind of thiocarbohydrazide wastewater treatment method according to claim 1, it is characterised in that：Reaction kettle in the S3 Control temperature is at 35 degree or less after being inside passed through recirculated water.

4. a kind of thiocarbohydrazide wastewater treatment method according to claim 1, it is characterised in that：Reaction kettle in the S4 Interior pH value stops logical chlorine at 3 or so.

5. a kind of thiocarbohydrazide wastewater treatment method according to claim 1, it is characterised in that：It is recycled in the S5 Sulphur weight is 200kg, and COD is 5000 mg/L or so, ammonia nitrogen amount 500mg/L after treatment.