Novel boiler phosphorus-free multifunctional water treatment agent

Abstract

The novel boiler phosphorus-free multifunctional water treatment agent comprises the following substances in parts by mass: 10-20 parts of dipotassium ethylene diamine tetraacetate, 6-10 parts of polyacrylamide, 8-16 parts of ethanolamine, 2-4 parts of an antioxidant, 1-2 parts of a surfactant, 2-4 parts of a scale corrosive, 1-2 parts of a stabilizer, 2-3 parts of a scale scouring agent and 0.5-1.5 parts of a dispersing agent. No phosphorus is added in water treatment, and safety and environmental protection are achieved; meanwhile, the water treatment agent disclosed by the invention can inhibit the formation of scale; scale attached to the inner wall of the boiler can be destroyed and scoured through the combined action of dipotassium ethylenediaminetetraacetate, polyacrylamide, ethanolamine, a surfactant, a scale corrosive agent and a scale scouring agent, and meanwhile rust formed on the inner wall of the boiler due to scale attachment can be destroyed and scoured; and on the premise of ensuring environmental protection, scale formation can be prevented, and scale attached to the inner wall of the boiler and rust on the inner wall of the boiler can be cleaned, so that normal use of the boiler is ensured.

Description

Technical Field

[0001] The invention belongs to the field of boiler water treatment agents, in particular to a novel non-phosphorus multifunctional boiler water treatment agent. Background Art

[0002] Boiler scale refers to solid matter formed by the deposition of minerals in water at high temperatures during boiler operation. The main components of boiler scale include calcium carbonate, calcium sulfate, calcium phosphate, silicate, etc. These components will reduce the heat transfer efficiency of the boiler, increase energy consumption, and may even cause safety accidents.

[0003] Therefore, during the operation of the current boiler, water treatment agents need to be added to the water added to the boiler to reduce the probability of scale formation. Previously, phosphorus-containing water treatment agents were more common. The use of phosphorus-containing water treatment agents can be traced back to the early 20th century and played an important role in the industrial and environmental protection fields. Later, they were widely used in boiler water treatment. The more common phosphorus-containing water treatment agents such as phosphates and nitrates are mainly used to prevent scaling and corrosion problems in water systems. For example, phosphates, as corrosion inhibitors, can effectively reduce corrosion and deposit formation on metal surfaces.

[0004] However, with the increasing awareness of environmental protection, the use of phosphorus-containing water treatment agents also faces challenges. Phosphorus-containing water treatment agents can cause eutrophication of water bodies and promote the proliferation of algae and other aquatic plants. After these plants die, they will release toxic gases such as methane, hydrogen sulfide, and ammonia, making the water turbid and smelly, leading to lack of oxygen in the water, which in turn affects the survival of aquatic organisms and even turns rivers and lakes into stagnant water, seriously affecting the ecological environment. In addition, fluorescent brighteners and other chemical components in phosphorus-containing detergents may have adverse effects on aquatic organisms.

[0005] At the same time, if phosphorus enters the human body, it will affect the body's absorption of calcium, leading to calcium deficiency, which may induce diseases such as rickets; at the same time, it is irritating and can irritate the skin, causing dermatitis, peeling, blistering, itching and other symptoms.

[0006] Therefore, the research and development of phosphorus-free water treatment agents is also underway. At present, scale has formed in many boilers and adheres to the inner wall of the boiler, which is difficult to clean. Moreover, since the boiler is mostly made of steel and the scale is mostly salt, its attachment to the inner wall of the boiler may accelerate the corrosion of the boiler and the growth of rust, thereby affecting the normal use of the boiler. Summary of the invention

[0007] The invention provides a novel non-phosphorus multifunctional boiler water treatment agent to solve the defects in the prior art.

[0008] The present invention is achieved through the following technical solutions:

[0009] The new type of boiler phosphorus-free multifunctional water treatment agent includes the following substances in parts by weight: 10-20 parts of dipotassium ethylenediaminetetraacetate, 6-10 parts of polyacrylamide, 8-16 parts of ethanolamine, 2-4 parts of antioxidant, 1-2 parts of surfactant, 2-4 parts of scale corrosive agent, 1-2 parts of stabilizer, 2-3 parts of scale flushing agent and 0.5-1.5 parts of dispersant.

[0010] The novel non-phosphorus multifunctional boiler water treatment agent as described above, wherein the molecular weight of the polyacrylamide is 1×10 8 -2×10 8 .

[0011] In the novel non-phosphorus multifunctional boiler water treatment agent as described above, the antioxidant is any one of citric acid, butylated hydroxyanisole, glutathione and pentaerythritol or a mixture of any two or more thereof in any proportion.

[0012] In the novel non-phosphorus multifunctional boiler water treatment agent as described above, the surfactant is any one of sodium dodecylbenzene sulfonate, ammonium trihydrogen diformate, potassium carboxylate, and sodium formate, or a mixture of any two or more of them in any proportion.

[0013] The novel non-phosphorus multifunctional boiler water treatment agent as described above, wherein the scale corrosive agent is a sodium type cation exchange resin or a hydrogen type cation exchange resin.

[0014] In the novel non-phosphorus multifunctional boiler water treatment agent as described above, the stabilizer is any one of antimony lactate, lanthanum trifluoromethanesulfonate, and bis(isooctyl mercaptan) tin n-octylate.

[0015] The novel non-phosphorus multifunctional boiler water treatment agent as described above, wherein the scale flushing agent is any one of isopropyl alcohol, n-propyl alcohol, hydroxymethyl cellulose and polyvinyl pyrrolidone or a mixture of any two or more of them in any proportion.

[0016] The novel non-phosphorus multifunctional boiler water treatment agent as described above, wherein the dispersant is any one of polyacrylate, polyoxyethylene alkylphenol ether, polyethylene glycol ether and sodium lignin sulfonate or a mixture of any two or more of them in any proportion.

[0017] The preparation method of the novel non-phosphorus multi-functional boiler water treatment agent as described above comprises the following steps:

[0018] Step 1: Accurately weigh dipotassium ethylenediaminetetraacetic acid, polyacrylamide, ethanolamine, antioxidant, surfactant, scale corrosive agent, stabilizer, scale scouring agent, and dispersant according to the ratio;

[0019] Step 2: After weighing, crush and mix them, dry and package them to obtain the finished product.

[0020] The novel non-phosphorus multi-functional boiler water treatment agent as described above is crushed in step 2 and then passed through a 500-mesh sieve, and then dried at a temperature of 60-70° C. for 30-40 minutes.

[0021] The advantages of the present invention are: no phosphorus is added in the water treatment of the present invention, which is safe and environmentally friendly; at the same time, the water treatment agent of the present invention can not only inhibit the formation of scale, but also destroy and flush the scale attached to the inner wall of the boiler through the joint action of dipotassium ethylenediaminetetraacetic acid, polyacrylamide, ethanolamine, surfactant, scale corrosive agent and scale flushing agent, and at the same time, the rust formed on the inner wall of the boiler due to the attachment of scale can also be destroyed and flushed, so that the formation of scale can be prevented and the scale attached to the inner wall of the boiler and the rust on the inner wall of the boiler can be cleaned under the premise of ensuring environmental protection, so as to ensure the normal use of the boiler. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Example 1

[0024] Step 1: Accurately weigh 10 parts of dipotassium ethylenediaminetetraacetate and polyacrylamide (molecular weight 1×10 8 -2×10 8 ) 6 parts, ethanolamine 8 parts, glutathione 2 parts, sodium formate 1 part, hydrogen type cation exchange resin 2 parts, trifluoromethanesulfonate 1 part, polyvinyl pyrrolidone 2 parts, polyethylene glycol ether 0.5 parts;

[0025] Step 2: After weighing, crush and mix them, pass them through a 500-mesh sieve, and then dry them at 60°C for 40 minutes to obtain a new type of boiler phosphorus-free multi-functional water treatment agent.

[0026] Example 2

[0027] Step 1: Accurately weigh 20 parts of dipotassium ethylenediaminetetraacetate and polyacrylamide (molecular weight 1×10 8 -2×10 8) 10 parts, 16 parts of ethanolamine, 1 part of citric acid, 1 part of butylated hydroxyanisole, 1 part of glutathione, 1 part of pentaerythritol, 1 part of sodium dodecylbenzenesulfonate, 0.3 parts of ammonium trihydrodiformate, 0.5 parts of potassium carboxylate, 0.2 parts of sodium formate, 4 parts of sodium type cation exchange resin, 2 parts of bis(isooctyl mercaptan) tin n-octylate, 0.5 parts of isopropanol, 0.5 parts of n-propanol, 1 part of hydroxymethyl cellulose, 1 part of polyvinyl pyrrolidone, 0.2 parts of polyacrylate, 0.2 parts of polyoxyethylene alkylphenol ether, 0.7 parts of polyethylene glycol ether, and 0.4 parts of sodium lignin sulfonate;

[0028] Step 2: After weighing, crush and mix them, pass them through a 500-mesh sieve, and then dry them at 60-70℃ for 30-40min to obtain a new type of boiler phosphorus-free multi-functional water treatment agent.

[0029] Example 3

[0030] Step 1: Accurately weigh 13 parts of dipotassium ethylenediaminetetraacetate and polyacrylamide (molecular weight 1×10 8 -2×10 8 ) 9 parts, ethanolamine 11 parts, citric acid 0.5 parts, pentaerythritol 2 parts, sodium dodecylbenzene sulfonate 0.5 parts, ammonium trihydrodiformate 1.1 parts, sodium type cation exchange resin 4 parts, antimony lactate 1.7 parts, scale scouring agent isopropyl alcohol 1 part, hydroxymethyl cellulose 1 part, polyacrylate 0.5 parts, and sodium lignin sulfonate 0.5 parts;

[0031] Step 2: After weighing, crush and mix them, pass them through a 500-mesh sieve, and then dry them at 68°C for 34 minutes to obtain a new type of boiler phosphorus-free multi-functional water treatment agent.

[0032] Example 4

[0033] Step 1: Accurately weigh 17 parts of dipotassium ethylenediaminetetraacetate and polyacrylamide (molecular weight 1×10 8 -2×10 8 ) 9 parts, ethanolamine 8 parts, citric acid 1 part, butylated hydroxyanisole 1 part, glutathione 1 part, ammonium trihydrodiformate 0.3 parts, potassium carboxylate 0.2 parts, sodium formate 0.4 parts, hydrogen type cation exchange resin 4 parts, lanthanum trifluoromethanesulfonate 2 parts, isopropanol 1 part, hydroxymethyl cellulose 1 part, polyvinyl pyrrolidone 1 part, polyoxyethylene alkylphenol ether 0.5 parts, polyethylene glycol ether 0.5 parts, sodium lignin sulfonate 0.5 parts;

[0034] Step 2: After weighing, crush and mix them, pass them through a 500-mesh sieve, and then dry them at 65°C for 40 minutes to obtain a new type of boiler phosphorus-free multi-functional water treatment agent.

[0035] Example 5

[0036] Step 1: Accurately weigh 15 parts of dipotassium ethylenediaminetetraacetate and polyacrylamide (molecular weight 1×10 8 -2×10 8 ) 10 parts, 14 parts of ethanolamine, 1 part of glutathione, 2 parts of pentaerythritol, 1 part of sodium formate, 3 parts of sodium type cation exchange resin, 2 parts of lanthanum trifluoromethanesulfonate, 2 parts of hydroxymethyl cellulose, 1 part of polyvinyl pyrrolidone, 1 part of polyacrylate, and 0.5 parts of sodium lignin sulfonate;

[0037] Step 2: After weighing, crush and mix them, pass them through a 500-mesh sieve, and then dry them at 62°C for 39 minutes to obtain a new type of boiler phosphorus-free multi-functional water treatment agent.

[0038] Example 6

[0039] Step 1: Accurately weigh 15 parts of dipotassium ethylenediaminetetraacetate and polyacrylamide (molecular weight 1×10 8 -2×10 8 ) 8 parts, ethanolamine 12 parts, glutathione 3 parts, potassium carboxylate 1.5 parts, hydrogen type cation exchange resin 3 parts, trifluoromethanesulfonate lanthanum 1.5 parts, scale scouring agent polyvinyl pyrrolidone 2.5 parts, sodium lignin sulfonate 1 part;

[0040] Step 2: After weighing, crush and mix them, pass them through a 500-mesh sieve, and then dry them at 65°C for 35 minutes to obtain a new type of boiler phosphorus-free multi-functional water treatment agent.

[0041] The performance of Examples 1-6 and the control example (a boiler descaling agent of model GL-020) was tested.

[0042] First, 21 electric heating rods were placed in high salt water (calcium ion concentration was 0.1 mol / L, magnesium ion concentration was 0.1 mol / L, carbonate concentration was 0.1 mol / L, sulfate concentration was 0.1 mol / L because carbonate and sulfate accounted for the vast majority of scale, and cations were mainly calcium ions and magnesium ions, so the above ions were selected as the main scale components for operation), and heated repeatedly until a uniform scale layer was formed on the surface of the electric heating rod, and the scale layer thickness was 2±0.2 mm. The preparation was completed. After completion, they were placed in beakers filled with 500 ml of water, and then each group of three was named Example 1 Group, Example 2 Group, Example 3 Group, Example 4 Group, Example 5 Group, Example 6 Group and Control Group in sequence, and then all were heated to 60°C and a rotor was added for magnetic stirring to simulate boiler water flow, and 30 g of the corresponding water treatment agent was added to each group, and the changes in scale on the surface of the electric heating rod were observed and continuously observed, with the 2 / 3 shedding of scale on the surface of the electric heating rod as the termination point and the time recorded, and the final average was recorded for each group. The specific data are shown in Table 1.

[0043] Group Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparison example Time (min) 37.2 34.9 33.8 41.5 38.2 33.6 89.3

[0044] Table 1

[0045] The above method is then used to replace the electric heating rod with a scale layer with an iron plate with similar surface rust and put it into the corresponding beaker. Other operations are the same. The scale changes on the surface of the electric heating rod are observed and continuously observed. The end point is when 3 / 4 of the rust on the iron plate falls off, and the time is recorded. The final average is recorded for each group. The specific data are shown in Table 2.

[0046] Group Example 1 Example 2 Example 3 Example 4 Example 5 Example 6 Comparison example Time (min) 12.3 13.4 11.5 12.6 13.7 12.1 38.5

[0047] Table 2

[0048] It can be seen from the data in Table 1 and Table 2 that the performance of Examples 1-6 of the present invention in treating attached scale and rust is far superior to that of the comparative example. Therefore, the new type of boiler phosphorus-free multi-functional water treatment agent prepared by the present invention can not only inhibit the formation of scale, but also quickly destroy and flush the scale attached to the inner wall of the boiler. At the same time, it can also destroy and flush the rust formed on the inner wall of the boiler due to scale attachment, thereby realizing multifunctional cleaning of the inside of the boiler, ensuring the long-term and stable use of the boiler, and reducing the boiler accident rate.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. New type of boiler phosphorus-free multi-functional water treatment agent, characterized by: The invention comprises the following substances in parts by weight: 10-20 parts of dipotassium ethylenediaminetetraacetate, 6-10 parts of polyacrylamide, 8-16 parts of ethanolamine, 2-4 parts of antioxidant, 1-2 parts of surfactant, 2-4 parts of scale corrosive agent, 1-2 parts of stabilizer, 2-3 parts of scale flushing agent and 0.5-1.5 parts of dispersant.

2. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized in that: The molecular weight of the polyacrylamide is 1×10 8 -2×10 8 .

3. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized in that: The antioxidant is any one of citric acid, butylated hydroxyanisole, glutathione and pentaerythritol or a mixture of any two or more of them in any proportion.

4. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized in that: The surfactant is any one of sodium dodecylbenzene sulfonate, ammonium trihydrogen diformate, potassium carboxylate and sodium formate, or a mixture of any two or more of them in any proportion.

5. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized in that: The scale corrosive agent is a sodium type cation exchange resin or a hydrogen type cation exchange resin.

6. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized in that: The stabilizer is any one of antimony lactate, lanthanum trifluoromethanesulfonate and bis(isooctyl mercaptan) tin n-octylate.

7. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized by: The scale flushing agent is any one of isopropyl alcohol, n-propyl alcohol, hydroxymethyl cellulose and polyvinyl pyrrolidone or a mixture of any two or more of them in any proportion.

8. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized by: The dispersant is any one of polyvinyl ester, polyoxyethylene alkylphenol ether, polyethylene glycol ether and sodium lignin sulfonate or a mixture of any two or more of them in any proportion.

9. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized in that: The preparation method thereof comprises the following steps: Step 1: Accurately weigh dipotassium ethylenediaminetetraacetic acid, polyacrylamide, ethanolamine, antioxidant, surfactant, scale corrosive agent, stabilizer, scale scouring agent, and dispersant according to the ratio; Step 2: After weighing, crush and mix them, dry and package them to obtain the finished product.

10. The novel non-phosphorus multifunctional boiler water treatment agent according to claim 1 is characterized by: After being crushed in step 2, the powder is sieved through a 500-mesh sieve and then dried at a temperature of 60-70° C. for 30-40 minutes.