Emergency plan text 2

2.1.1 Natural conditions

2.1.1.1 Location

Shenyang Xinji Chemical Co., Ltd. is located in Shenbei New District Chemical Industry Park, Shenyang City, Liaoning Province, covering an area of ​​100,000 square meters, including a production plant and an office area.

2.1.1.2 Meteorological conditions

Shenbei located in the northern suburb of Shenyang City, the main characteristics of the climate, winter by the Siberia continental climate control, multi-north, northwest wind, cold, long drying time. Spring and mild autumn weather, time is short, capricious, and high evaporation. Summer impact of oceanic climate, and more southerly and southwesterly winds, according to the district meteorological statistics, the maximum temperature of 34.6 ℃, minimum temperature of -32.7 ℃, annual average temperature of 7.2 ℃, relative humidity of 66%, the annual average precipitation the amount of 702.4 mm, mostly concentrated in the summer. The annual average wind speed 3.3 m / s, the maximum monthly average wind speed of 4.8 m / sec. Throughout the year, the number of smoke days 103 days, mainly in winter.

2.1.1.3 Hydrogeological conditions

Topographic for the features, the region is on the Liao alluvial plain, flat, altitude of 36 to 84 m, the relative height difference of 10 to 40 meters. The geomorphology of this area is divided into high river floodplain soil, loess-type sediment, light clay to heavy clay, and generally covers a height of 10.14 meters and a soil permeability coefficient of 0.05 to 0.1. The terrain of the plant area is slightly inclined from southeast to northwest. The distribution of top-down geological lithology is:

① Ploughing soil, plant layer of topsoil, layer thickness of 1 meter;

②Clay clay, yellow, wet, very loose, 5 m thick;

③Clay, gray, wet, relatively loose, layer thickness 8 meters;

④Fine sand, off-white, containing coarse sand 20%, layer thickness 4 meters;

⑤ Coarse sand, grayish white, loose, mixed with 20% garden gravel, layer thickness of 3 meters;

⑥Guanyuan gravel, yellow-brown, dominated by quartzite, followed by granite, with a small amount of pebbles and coarse sand mixed, the layer thickness is 6.5 meters;

⑦ Clay, yellow-brown, slightly wet, relatively loose, layer thickness 8.5 meters;

⑧ Clay, gray or black-gray, wet, plastic, loose, layer thickness 6 meters;

⑨ Clay, yellow, slightly wet, plastic, relatively hard, with a layer thickness of 3 meters;

⑩ Clay, gray, plastic, 12 m thick;

11 pebbles, yellow, mainly quartzite, followed by granite, the degree of turbidity is better, a particle size of 50 to 70 mm, the largest can reach 170 mm, with a small amount of coarse sand mixed with a thickness of 3 meters;

12 wet sandstone, yellow-brown sandstone, yellow-brown gray variegated, lithological surface has been weathered, very hard, 1 m thick.

2.1.1.4 Surface water conditions

Site north of the river, serious long river flows into the body of the Liaohe River pollution, which rises in the east village Shenbei, Ma Gang Qiu Township ditch, flowing in the Temple, water station, New Castle, Huang et al., In the high inflow of kain Liaohe. A total length of 32km, the basin area 112.25km2. As the industrial wastewater discharge for a long time, the high concentration of organic matter deposited continuously, so that the original crystal clear, fish in groups of river, now turned into a mass extinction, stinking Song Da.

2.1.2 Surrounding social environment

Environmentally sensitive target distribution plant near the company mainly residents, such as surface water, no rare flora and fauna, no historical sites and nature reserves.

The surrounding environment sensitive targets are shown in the following table 2-1:

Table 2-1 Surrounding environment sensitive targets

 

Environmental category	Serial number	Environmentally sensitive targets	And the orientation of the enterprise	Distance from the nearest factory boundary (m)		Sensitive target	Environmental quality standards
surroundings Air	1	Liuwangtun	NW	1800		Residential area	Secondary standard in "Ambient Air Quality Standard" (GB3095-1996)
	2	New castle	NE	1700		Residential area
	3	Xinchengzi Zhen	SE	1900		Residential promiscuous area
	4	Residential area	S	800		Residential area
	5	Wuwu Village	ES	1700		Residential area
Surface water	1	Long river	N	1500		river	Class III Standards in Surface Water Environmental Quality Standards (GB3838-2002)
Groundwater	1	groundwater	——				Class III Standard in Groundwater Quality Standard (GB14848-93)
noise	—	——	——	——	——		Acoustic Environmental Quality Standards (GB3096-2008) Class 1 and 2 standards

Environmental protection objectives: The company is located in the Shenbei New District Chemical Industry Park in Shenyang City. There are no rare animal and plant resources, no scenic spots and natural reserves around the plant.

2.1.3 Environmental risk sources

Shenyang Xinji Chemical Co., Ltd. currently has only one production line with an annual output of 1,000 tons of optical brightener CF-351, which mainly includes production workshops such as esterification workshop, condensation workshop, brine recovery workshop, and drying workshop.

2.1.3.1 Overview of production process

(1) Esterification process: Dichlorobenzyl and triethyl phosphite are added to the esterification kettle to carry out the esterification reaction. After the reaction, the remaining triethyl phosphite is distilled off, and the remaining materials are sent to the condensation workshop. Esterification reaction equation:

 

(2) Condensation process: Esterate, sulfonate, and dimethyl sulfoxide are added to the condensation reaction kettle, and sodium methoxide is added dropwise from the sodium methoxide metering tank under stirring, and the reaction is completed. The material is conveyed to the filter press by the condensation material conveying pump, the mother hydraulic pressure is to the dimethyl sulfoxide, the mother liquid intermediate storage tank, and the dimethyl sulfoxide mother liquid conveying pump is sent to the solvent recovery workshop. The crude product enters a salting-out kettle for salting out, and then is filtered to obtain a wet cake. The cake is sent to a drying workshop, dried by a rotary flash drying system, and then packed into a warehouse.

Condensation reaction equation:

 

O

‖

O

‖

 

 

 

 

CH2P(OCH3)2+2CH3ONa

CHO＋(CH3O)2P－CH2

2

　　　　　　　　　　  

‖

O

 

 

SO3Na

 

 

 

 

+2CH3OH+2NaOP(OCH3)2

CH＝CH

CH＝CH

　　　　　          

 

④

SO3Na

SO3Na

 

(Note: ④ sodium dimethoxyphosphate. Condensation conversion rate is 96%)

(3) Process brine recovery process: The salt produced by pressure filtration in the salting-out process. Water is added to the salt distribution kettle, and the crude salt produced in the salting-out and pressure filtration processes is added under stirring. Hour, take the supernatant and measure the specific gravity to determine the brine saturation. Add flocculant (add 1/1000 of water) and stir for 1 hour. The material was cooled to 50 ° C and left to stand for 20 hours. Celite was added when the temperature of the feed liquid was cooled to 30 ° C, and stirred for 0.5 hours. Circulate the filter press. When the filtrate is clear, transfer to the receiving tank. The resulting brine is put into production.

(4) Drying process: This workshop includes a set of rotary flash dryer and pelletizing device. The flash-dried materials are qualified and obtained after mixing and packaging. The wet product is granulated and packaged by a granulating device to obtain a product.

(5) Solvent recovery process: The filtrate from the chloromethylation workshop enters the cyclohexane distillation kettle, and the distilled gas is condensed and recovered for reuse. The solvent from the esterification workshop enters the distillation kettle for atmospheric distillation, and the gas is rectified under a certain reflux ratio, and then reused after condensation. The solvent from the condensation workshop enters the DMSO (dimethyl sulfoxide) evaporation kettle under reduced pressure, and the gas is condensed. The solution is pumped to a DMSO (dimethyl sulfoxide) rectification column, which is distilled under reduced pressure. The gas is condensed and reused.