CN103468333B - OILY water sludge coke slurry and preparation method - Google Patents

Abstract

The present invention relates to a method for preparing aqueous coke slurry and oily sludge; 100% by mass, consists of the following components: 50% petroleum coke and 75%; oily sludge from 0.1% to 15%; dispersant 0.001% to 1%; oily sludge modification agents from 0% to 1%; the balance being water; dispersing agent is a naphthalene sulfonates, polycarboxylates, lignin sulfonates or humic acid surfactant or a mixture of several substances; oily sludge modifying agent is a divalent or trivalent iron, aluminum or calcium ions metal inorganic salt; crude oil content sludge formation in the mining, transport, processing , water mixture; oily sludge coke water slurry prepared by the present process has a high calorific value, good fluidity and stability, easy to store, transport and atomization, combustion or gasification as feedstock, a large-scale application.

Description

OILY water sludge coke slurry and preparation method

FIELD

[0001] The present invention relates to a high-concentration, high stability oil sludge, petroleum coke slurry mixing and preparation method, particularly relates to a water slurry of a high power stability of oil sludge and its preparation method.

Background technique

[0002] Petroleum coke is a delayed coker oil refining companies in the production of light oil is a by-product, similar to the physical form of coal. High content of petroleum coke, high calorific value, low volatile, anthracite with similar properties. Its low calorific is about 1.5~2 times the normal thermal coal. But the water power pulp disadvantage of poor stability, the production process requires the use of a method of adding a stabilizer to increase the water coke slurry stabilization time. Stabilizers will not only increase the cost of water power pulp slurry, and the apparent viscosity of the slurry will increase, reducing the petroleum coke slurry concentration using economy. Coke slurry and the water is easy to form dilatant fluid, which contrary to yield pseudoplastic properties of the slurry over the slurry fuel. Also, because petroleum coke low volatile, less reactive, difficult ignition and combustion, gasification efficiency is not high.

[0003] In crude oil production, transportation, processing will produce a lot of oil sludge. This sludge yield, high oil content, high heavy oil component, and also contains a lot of toxic benzene malodorous substances and heavy metals was phenols, anthracene, pyrene, it was 1998 on July 1 was included in the "national List of hazardous wastes", is a toxic, flammable waste. The method of treatment of oil sludge and abroad are: solvent extraction, biological treatment, incineration and the like. Since the oily sludge is often sufficient oil emulsion, the oil is difficult to achieve - effective separation of water. And oily sludge moisture content can not support high spontaneous combustion, resulting in increased oil sludge and emissions, increased treatment costs. Oily sludge currently no safe and reliable, and efficient approach taking into account the efficiency gains, and the petrochemical industry is needed to solve a major problem.

SUMMARY

[0004] The object of the present invention is to provide one kind of water-oily sludge and coke slurry preparation method proposed prepared by mixing petroleum coke oily sludge and oil sludge coke water slurry. After addition of sludge, significantly improved the stability of aqueous slurry, can fully meet production needs. Meanwhile, the process may take advantage of oily sludge water, heat. Oily sludge and other light hydrocarbons, volatile organic compounds increase the slurry fuel, and heating value, to compensate for the disadvantages of volatile water coke slurry and partial combustion gasification of a low difficulty. Water sludge coke slurry prepared pumpable and readily atomized, and storage stability ignition combustion and gasification. Without reducing the water slurry coke concentration on the combustible components, greatly improve the stability of the aqueous slurry of coke. While energy directly oily sludge, petroleum coke efficient use of resources and oily sludge.

[0005] The present invention is oil sludge coke slurry water to 100% by mass of the components by the following composition:

[0006] Petroleum coke 50% ~ 75%;. Oily sludge ~ 15% 1% billion; dispersant of 0.001% ~ 1%; oily sludge modification agents 0% ~ 1%; the balance being water.

[0007] The high carbon content of the solid by-products formed after petroleum coke is petroleum processing.

[0008] The oil-containing industrial sludge arbitrary ratio formed during mixing oil, water mixture, which may also contain one or more emulsifying agents, solid particles, including inorganic salts.

[0009] The aqueous oily sludge coke slurry naphthalene sulfonate dispersant is a substance or a mixture of several polycarboxylates, lignin sulfonates or humic acid surface active agents.

[0010] The oily sludge modifier is iron, aluminum, calcium divalent, trivalent metal ions of inorganic salts.

[0011] Preparation of the oily sludge coke water slurry of the present invention, comprising the steps of:

[0012] a • oily sludge and oil sludge modification agents diluted with water and the mixture was stirred to prepare a mixture of modified oil sludge;

[0013] b • modifying the oily sludge petroleum coke, a dispersing agent was added a mixed solution prepared in step a grinding mill, the solid particle size <〇.5ram water so as to obtain the oily sludge coke slurry.

[0014] seen from the above disclosed technical solution, the present invention utilizes sludge, petroleum coke, coke prepared aqueous slurry of oil sludge, sludge full use of water, heat. The present invention is simple, less energy consumption, low cost, and less secondary pollution generated. This preparation method has the advantage of improved rheology and stability of the aqueous slurry of coke. The obtained aqueous slurry of coke yield pseudoplastic fluid, place a long time will not produce a hard precipitate, and good fluidity, suitable for sending Li, can be used as fuel combustion or gasification feedstock.

[0015] Oily sludge coke water slurry of the present invention, not only the high combustible component, and can improve water-volatile coke slurry water partial enhance the combustibility of coke slurry. A lot of iron, nickel and the like contained in the oily sludge components, the reactivity of petroleum coke can be improved, thereby enhancing the utilization efficiency of the petroleum coke.

High concentrations of oily sludge coke water slurry preparation of the present invention [0016] This can be burned as fuel or gasified starting material. Only make full use of the calorific value of oil sludge, but also to overcome the oily sludge of high water content, high heat energy disadvantage. By high temperature is effective to destroy the toxic oil sludge, hazardous organic pollutants, the drawbacks of prior art call toxic exhaust emissions and waste water, to obtain a double economic and environmental benefits.

BRIEF DESCRIPTION

[0017] FIG. 1 is a schematic view showing a process flow of oil sludge coke water slurry of the present invention

Detailed ways

[0018] Example 1

[0019] 1. Materials

[0020] (1) a refinery sludge, a water content of 59.9wt%;

[0021] (2) petroleum coke in a refinery, a sulfur content of 4.88wt%, an ash content of 0 • 15wt%;

[0022] ⑶ dispersing agent (sodium naphthalene sulfonate formaldehyde condensates);

[0023] ⑷ sludge modification agents (ferric sulfate);

[0024] ⑸ water.

[0025] 2. Preparation Conditions

[0026] (1) raw material ratio (mass percent)

[0027] 67.65% petroleum coke, oil sludge 3 • Island%, 28 • 53% parts water, 0 • 34% parts of a dispersing agent, 0.1% sludge modification agents parts.

[0028] (2) Preparation

[0029] First, the modified sludge mixed with oily sludge agents, and the hook are stirred, to obtain the modified sludge. The petroleum coke grinding and mixing water, and a dispersant, to obtain an aqueous slurry coke.

[0030] 3. Product Performance

[0031] ① external shape: black slurry. At 25 ° C, an apparent viscosity of 1099mPa • s, have good [0032] good flowability, Li sent;

[0033] ② solid content ratio (mass%): 69%;

[0034] ③ slurry of solid particle size: less than 500 microns;

[0035] ④ Stability: 8 days no precipitation occurs soft, hard precipitation does not occur 12 days.

[0036] Example 2

[0037] 1. Materials

[0038] Example 1 with

[0039] 2. Preparation Conditions

[0040] (1) raw material ratio (mass percent)

[0041] Petroleum coke 65 • 39%, oily sludge 6 • 54%, 27 • 54% parts water, 0 • 33% parts of a dispersant, sludge modification agents 0.20% parts.

[0042] (2) Preparation

[0043] Example 1 with

[0044] 3. The wide product performance

[0045] ① external shape: black slurry. At 25 ° C, an apparent viscosity of l〇63mPa • s, with good flowability, pumpable;

[0046] ② solid content ratio (mass%): 68%;

[0047] ③ slurry of solid particle size: less than 500 microns;

[0048] ④ Stability: 15 days no precipitation occurred hard.

Claims (1)

A coke slurry oil sludge water, characterized in that: on 100% by mass, consisting of the following constituents: petroleum coke 67.65%; 3.38% oily sludge; dispersing 0 • 34%; oily sludge changed of drug square • 1%; the balance being water; solids content oily sludge coke water slurry obtained was 69%; alternatively, _ 100% by mass, consists of the following components: 65.39% petroleum coke; oil sludge 6.54%; dispersant 0 • 33%; oily sludge modification agents 0.2%; the balance being water; solids content oily sludge coke water slurry obtained was 68%; wherein said dispersant is sodium naphthalene sulfonate formaldehyde condensate; oil sludge modification agents according to ferric sulfate; the oleaginous crude oil sludge formation in the mining, transportation, processing, water, or a mixture further comprises an emulsifier, solid particles, including one or more inorganic salts, a water content of 59 • 9%; sulfur content of the petroleum coke is 4.88%, ash square • 15%; oily sludge according to water power slurry was prepared by the following method:. a oily sludge and oil sludge modification agents were mixed and stirred and diluted with water to prepare a modified oil sludge Prepared solution; b • petroleum coke, oil sludge dispersant and modifiers added to the mixture in the grinding mill, the solid particle size <0.5mm〇