Equipment and method for cooperative treatment of drilling solid waste by using cement kiln

A drilling waste and co-processing technology, applied in combustion methods, cement production, lighting and heating equipment, etc., can solve problems such as insufficient mixing of raw materials, ecological environment damage, and fluctuations in cement quality

Pending Publication Date: 2019-01-25
乐山华宇欣和石油科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two major problems in the thermal decomposition method: one is that an external energy source is required to heat the cuttings to a high temperature, resulting in a serious waste of resources
A large number of additional pollution control devices need to be built, and fly ash is still hazardous waste; second, there is no perfect treatment process for the generated harmful gas substances, which is easy to cause secondary pollution
[0004] Chinese patent applications CN201611090583.7 and CN201710022627.0 are processed by biological fermentation. This method has harsh environmental conditions, less processing capacity, long processing cycle, and high cost. If not properly controlled, it is easy to cause damage to the local ecological environment. , this type of processing technology is not yet mature
Since the polluted soil is simply crushed, it cannot fully mix and react with the raw meal, which will eventually lead to fluctuations in cement quality
[0009] The technological process described in the above technology does not fully control the secondary pollution that may be generated during the treatment process, and does not meet the relevant requirements for the treatment of hazardous solid waste in cement kilns

Method used

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  • Equipment and method for cooperative treatment of drilling solid waste by using cement kiln
  • Equipment and method for cooperative treatment of drilling solid waste by using cement kiln
  • Equipment and method for cooperative treatment of drilling solid waste by using cement kiln

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0053] The oil-based mud cuttings in this case were taken from a shale gas drilling well in Sichuan after solid-liquid separation. The chemical composition, phase composition and thermal performance test results are shown in Table 1. Figure 4 and Figure 5 . Wherein Table 1 specifies the chemical composition and content of cuttings; Figure 4 It is the XRD diffraction pattern of the cuttings. The test results show that the cuttings mainly contain mineral phases such as quartz, limestone, dolomite, barite, and mica. Figure 5 It is the result of TG-DSC detection of cuttings. The analysis shows that the weight loss in the temperature range of 200°C is 2.49%, and most of the weight loss of this part is water volatilization. The loss is the decomposition of organic matter, so it can be seen that the water content in the cuttings is small, and most of the loss on ignition is caused by the volatilization of white oil.

[0054] Table 1 The chemical composition and content of oil-...

Embodiment 2

[0057] The oil-bearing soil in this case was taken from polluted soil near a mining platform in Changqing. The chemical composition is shown in Table 2. Its composition is also mainly composed of silicon oxide, aluminum oxide, iron oxide, and calcium oxide, and is close to the composition of drilling cuttings.

[0058] Table 2 Chemical composition and content of oil-bearing soil, unit: %;

[0059] Loss on ignition

Embodiment 3

[0061] The cuttings and cement raw materials in Example 1 are used for batching, and are designed as components of ordinary Portland cement clinker, and are calcined at 1450° C. for 30 minutes. The clinker is mixed with 5% dihydrate gypsum powder and ground into cement. The specific surface area is controlled at 342±10m 2 kg range. See Table 3, Table 4 and Table 5 for the specific batching scheme, clinker chemical composition and cement performance.

[0062] Table 3 ingredient scheme

[0063]

[0064] Table 4 Detection of clinker chemical composition, unit: %;

[0065] index

LOSS

SiO 2

Al 2 o 3

Fe 2 o 3

CaO

MgO

SO 3

f-CaO

IR

R 2 o

Cl-

sample

0.31

22.84

3.58

5.16

63.40

2.75

0.73

0.37

0.36

0.41

0.037

standard

≤3.0

/

/

/

/

≤5.0

≤3.5

/

≤0.75

≤0.75

≤0.06

[0066] Table 5 cement physical properties

[0067]

[0068] Accordin...

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Abstract

The invention discloses equipment and method for cooperative treatment of drilling solid waste by using a cement kiln. The equipment comprises the cement rotary kiln, a drilling waste storage and treatment closed system, a waste gas collecting and sealing treatment system and a waste water and waste liquid collecting and treatment system. The drilling waste is oil-based mud drilling rock debris oroil-containing soil, and the systems are fully closed. According to the equipment and method, the cement kiln is used for cooperative treatment of the oil-based mud drilling rock debris and the oil-containing soil, people only need to conduct adaptive reconstruction on an existing cement production line and pollution control facilities of the existing cement production line, the oil-based mud drilling rock debris and the oil-containing soil can serve as full-substitute materials, waste oil substances can serve as part of fuel to replace coal powder, and the consumption of fire coal and silicon materials of ton products can be reduced. Besides, emission of the pollutants can not be increased, hazardous solid waste of the similar kind can be effectively treated, and the purposes of recycling, reduction and harmless treatment of the hazardous solid waste are achieved.

Description

technical field [0001] The invention belongs to the technical field of solid waste treatment, and relates to a technical method for cooperating with cement kilns to process waste, in particular to a method for cooperating with cement kilns to process solid waste generated during the drilling and production of oil and gas wells: oil-based mud drilling cuttings, Oil-bearing soil, equipment and method for preparing Portland cement. Background technique [0002] Oil-based drilling mud is a drilling fluid with white oil or diesel oil as the continuous phase. Compared with water-based drilling mud, it has the advantages of high temperature resistance, salt and calcium erosion resistance, good borehole wall stability, good lubricity, and less damage to oil and gas layers. . It is widely used in complex wells and shale gas wells. However, during the drilling process of oil and gas resources development with oil-based mud, a large amount of oil-based mud drilling cuttings are produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B7/24C04B7/36F23G5/00F23G5/033F23G5/04F23G5/08F23G5/20F23G7/00F23G7/14
CPCF23G5/008F23G5/033F23G5/04F23G5/08F23G5/20F23G7/00F23G7/14C04B7/24C04B7/36F23G2209/24F23G2209/14F23G2204/101F23G2203/20F23G2201/10F23G2201/80F23G2201/70Y02P40/10
Inventor 赵加李志强汤可石
Owner 乐山华宇欣和石油科技有限公司
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