SU1293108A1 - Method of treating petroleum sludge - Google Patents

Abstract

The invention relates to petrochemistry, in particular to the processing of oil sludge. The degree of recovery of oil products from sludge and environmental protection is achieved by using raw oil sludge mixed with solid pyrolysis product of sewage sludge at a mass ratio of (1-2) .: 1. Their processing is carried out by heating at 450-500 ° C for 1-3 hours, followed by condensation of the vapor-gas mixture formed. As a result of heat treatment, oil products and water are evaporated. The residue is a solid product of the mineral part of oil sludge. The return of secondary petroleum products to the production cycle for subsequent processing increases the recovery rate of petroleum products and solves the problem of environmental protection. The method provides an increase in the recovery rate from 90 to 98%, a reduction in energy consumption due to repeated use of the solid pyrolysis product of wastewater as a carrier and its simultaneous utilization. S (l

Description

The invention relates to petrochemical technology, in particular to methods for processing oil sludge.

The purpose of the invention is to increase the degree of recovery of oil products from sludge and protect the environment.

The method is carried out in the following way.

Thermal treatment is carried out at 450-550 ° C for 1.5 to 3 hours. The pyrolysis product of solid sediment of domestic and industrial wastewater is obtained by the method of pyrolysis of solid sediment of domestic and industrial sewage sludge from wastewater treatment plants at 400-580 ° С within 1 to 3h.

The composition of the solid pyrolysis product fluctuates within the following limits, May.%

Organic portion 20-35

Mineral part 65-80

Volatile7-15

W

15

20

the bulk of the sludge remaining on the sorbent.

After each thermal processing cycle, the sorbent is discharged with the ash part of the oil psham, which again enters the mixer, which additionally adds 10–20% of the new carrier (partially used instead). The carrier can be used many times during the thermal sludge treatment process. .

The mixture formed in the vapor-gas reactor causes condensation on cooling. The condenser containing nefteprodukta and water is separated by settling, after which the oil products are sent to the secondary processing of oil, and the water, being purified, is discharged into the sewers.

By varying the temperature of thermal treatment of sludge, it is possible to regulate the degree of extraction of oil

0 / The elemental composition of solid coal is 25 ducts. At 450-550 C, the yield of the nefterodist pyrolysis product (on average), May,% C is 56.7 N 7.3 O 26.8 S 2.7 N 6.5.

Physical and chemical properties Density, g / cm 1.7-2.3 Specific surface area, m / g 10-15.

The solid pyrolysis product is a powdered material.

Oil sludges have a composition that fluctuates over a wide range, wt.%

Oil products 5-60

Water 20-60

Mineral part 5-50.

As a result of heat treatment, oil shafts make it possible to almost completely select the products contained in them. I,

Oil sludge is pre-mixed in a mixer with a carrier in the ratio of sludge: carrier from 1: 1 to 2: 1 (by weight).

The resulting mixture enters a rotary drum furnace, where it is subjected to heat treatment at 450-550 ° C for 1.5 to 3 hours. As a result of heat treatment, oil products and water are evaporated and a solid product consisting of a mine is formed.

35

40

45

50

55

products reaches 97-98% of their potential content in the original sludge.

The advantages of the proposed JV / 1 method are an increase in the degree and attraction of oil products from oil sludge from 90 to 98%, a decrease in energy consumption due to repeated use of the solid product of pyrolysis of wastewater as a carrier, simultaneous utilization of solid pyrolysis of sludge wastewater.

Example 1. 1 kg of oil sludge containing 40% oil, 50% water and 10% mineral part are mixed with the pyrolysis product of household and industrial sludge solid sediment of the following composition, wt%: organic part 30, mineral part 70. Oil sludge and the product of pyrolysis is taken in a ratio of 2: 1 and heat treated in a reactor with electrical heating for 1.5 hours. In the result of heat treatment of sludge with a sorbent, g: gas 10, not products 387, water 486, solid product, including solid pyrolysis product wastewater x water, the mineral part of the sludge and part of heavy petroleum products 617. The output of non-thermal products is

387

-SP-100 97%,

five

0

The bulk of the sludge remaining on the sorbent.

After each thermal processing cycle, a sorbent is discharged from the reactor with the ash part of the oil pshamam, which again enters the mixer, to which additional 10–20% of the new carrier is added (partially instead of the used one).

The vapor-gas mixture formed in the reactor condenses upon cooling. The condenser, which contains oil products and water, is separated by settling, after which the oil products are sent to the secondary processing of oil, and the water, after being purified, is discharged into the sewers.

By varying the heat treatment temperature of the sludge, it is possible to adjust the degree of extraction of oil / 5 ducts. At 450-550 ° C, the output of oil is 5 ducts. At 450-550 ° C output nefte0

five

0

five

0

five

products reaches 97-98% of their potential content in the original sludge.

The advantages of the proposed method JV / 1 are to increase the degree of recovery of oil products from oil sludge from 90 to 98%, reduce energy consumption due to repeated use of solid waste product pyrolysis product as a carrier, while utilizing solid waste product pyrolysis product.

Example 1. 1 kg of oil sludge containing 40% oil, 50% water and 10% of the mineral part are mixed with the pyrolysis product of solid residue of domestic and industrial sewage of the following composition, wt.%: Organic part 30, mineral part 70. Oil sludge and pyrolysis product taken in a ratio of 2: 1 and subjected to heat treatment in an electrically heated reactor for 1.5 hours. As a result of heat treatment of oil sludge with a sorbent, g: gas 10, oil products 387, water 486, solid product comprising the pyrolysis product of solid residue with intramural water, mineral sludge portion and a portion of heavy petroleum oil 617. Yield

387

-SP-100 97%,

, Example 2. The sludge composition according to example 1 is pre-mixed with the pyrolysis product of solid sediment of domestic and industrial wastewater of the following composition, wt.%: Organic part 25, mineral part 75. Oil sludge and product, pyrolysis is taken in a ratio of 2 : 1 and subjected to heat treatment at 500 ° C for 1.5 hours. As a result of condensation of the vapor-gas mixture, g: gas 24, petroleum products 392, water 480, a solid product containing the mineral portion of the sludge 604. The yield of petroleum products is

392,400

100 98%.

Froze The sludge composition of example 1 is pre-mixed with the pyrolysis product of solid residue of household and industrial wastewater of the following composition, wt.%: Organic part 35, mineral part 65. Oil sludge and pyrolysis product are taken in a 2: 1 ratio and heat treated at 550 ° C for 2 hours. After heat treatment, g: 28 gas, 388 oil products, 472 water, a solid product containing the mineral part of the sludge 612 are obtained. The yield of oil products is

388 400

100 97%.

Example 4. The sludge composition of Example 1 is pre-mixed with the pyrolysis product of solid sediment of domestic and industrial wastewater of the following composition, wt%, organic part 30, mineral part 70. Oil sludge and pyrolysis product are taken in accordance with 2: 1 and heat treated at при50 s for 1.5 hours. After heat treatment, g: gas 8, oil 360, water 495, solid product comprising a sorbent, the mineral part of the sludge and a part of heavy oil 637 are obtained.

360 400

100 90%.

At a temperature of 350 ° C, the yield of petroleum products is 90%, since

part of the heavy oil products remains on the carrier.

Example 5 (for comparison). The sludges of the composition of Example 1 are pre-mixed and mixed with the pyrolysis product of solid sewage sludge of the following composition, wt%: organic part 30, mineral part 70. Sludge and pyrolysis product are taken

in the ratio of 2: 1 and subjected to heat treatment at 600 ° C for 1.5.4. After heat treatment, g: gas 30, petroleum products 393, -waters 412, solid product containing the mineral part of the sludge, 625 are obtained. The yield of petroleum products is

393

Ш 2 Increasing the temperature of heat treatment of oil sludge from 550 to 600 С practically does not lead to an increase in the yield of oil products. Therefore, it is impractical to increase the heat treatment temperature above,

PRI me R 6. Oil sludge composition according to example 1 is mixed with

the volume of pyrolysis of solid sewage sludge composition according to example 2 in the ratio of 1: 1 and subjected to heat treatment at 500 ° C for 3 hours; After heat treatment, they receive, g: gas 25, oil products 392, water, 475, solid product containing the mineral part of the sludge, 1t08. The yield of petroleum products is

392

155 ° Example 7, Oil sludge composition according to example 1 is mixed with the pyrolysis product of solid sewage sludge composition according to example 2 in a 1: 2 ratio and subjected to heat treatment for 1.5 hours. After heat treatment, get g: gas 25, oil products 380, water

480, solid product containing mineral part of the sludge ,. 2115. The yield of petroleum products is

III PRI MER 8. Oil sludge composition according to example 1 is mixed with the pyrolysis product of solid sewage sludge composition according to example 1 in a ratio of 3: 1 and subjected to heat treatment at 500 ° C for 1.5 h. After heat treatment, g : gas 80, oil 959, water 1321, solid product, including mineral part. sludge, 1640. The yield of petroleum products is

959 T200

100 80%.

Example 9. Oil sludges of a composition according to Example 1 are mixed with the pyrolysis product of solid sewage sludge of the following composition, wt%: organic part 30, mineral part 70 in a 2: 1 ratio and heat treated at 500 ° C for 1 hour After heat treatment, g: gas 20, oil 340, water 485, solid product containing the mineral part of the sludge 655 are obtained. The yield of oil products is

W ° about "Example 10. The sludge composition according to example 1 is mixed with the product of the pyrolysis of solid sewage sludge composition according to example 9 in a ratio of 2: 1 and subjected to heat treatment at 500 C for 3.5 hours

After heat treatment receive, g:

I

Editor I. Casarda: Order 337/22

Compiled by N. Bogdanova

Tehred V.Kadar Proofreader S.-Shekmar

Circulation 464 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, Projecto st., 4

gas 25, petroleum products 392, water A79, solid product containing the mineral part of the sludge, 604. The yield of petroleum products is

392

50 0 ° 5 The increase in heat treatment time is impractical because the output

petroleum products does not increase.

The proposed method of processing sludge using as a carrier of the pyrolysis product of solid sewage sludge makes it possible to comprehensively and economically effectively solve the problem of environmental protection and return of secondary petroleum products to the production cycle for subsequent processing.

Claims (1)

Invention Formula Method for processing oil sludge by heat treatment at 450-550 ° C, followed by condensation of the vapor-gas mixture formed, characterized in that, in order to increase the degree of recovery of oil products from sludge and environmental protection, the feedstock is pre-mixed with solid pyrolysis of sewage sludge at a mass ratio of (1-2): 1.